A multiple push rod in-line fluid on-off control mechanism

Abstract

The utility model discloses a kind of multi-push rod series connection type fluid on-off control mechanism, including gas source input, valve body lock seat, valve body, piston push rod, cylinder plug rod, the cylinder plug rod is arranged in the cylinder inside valve body in series connection with at least one piston push rod, on-off component is arranged on cylinder plug rod, on-off component is moved by cylinder plug rod;Sealing element is installed between cylinder plug rod, piston push rod and the cylinder inside valve body;The cylinder end in valve body is equipped with gas path, gas source input is communicated with the gas path, gas can be moved by gas path synchronously to push multiple series connection piston push rod and cylinder plug rod.Multiple push rod series connection design is passed to the mechanism, can enhance driving force under same cylinder diameter, or reduce overall volume under equivalent driving force, with fault redundancy performance simultaneously, when partial push rod appears card stagnation, remaining push rod can still drive overall motion, ensure that dental sandblasting equipment is stably operated.

Description

Technical Field

[0001] This utility model relates to the field of ceramic valve technology, specifically to a multi-push rod series fluid on / off control mechanism. Background Technology

[0002] In dental treatment, dental air polishing equipment is a commonly used tool. It achieves functions such as cleaning and whitening teeth by spraying air polishing powder. The start and stop of air polishing powder spraying requires rapid response control, which is usually achieved by a ceramic valve installed on the main delivery pipeline of the equipment.

[0003] The existing ceramic valve works by using an input air source to drive a piston rod within a cylinder, which in turn moves an on / off assembly, connecting or disconnecting the through-hole on the assembly, ultimately controlling the flow of the sandblasting powder fluid. However, this existing technology has significant drawbacks: 1. In order to ensure sufficient pushing force when the air pressure drives the piston rod, a larger lateral area of ​​the top of the rod needs to be designed. This directly leads to an increase in the cylinder diameter and a larger overall size of the ceramic valve. In dental equipment with limited installation space, it is difficult to adapt flexibly and causes inconvenience to the installation work. 2. The piston push rod is a single-push structure. If it malfunctions or gets stuck due to seal failure, the entire ceramic valve will be unable to control the sand powder flow, causing the dental sandblasting equipment to malfunction and affecting the treatment process. Utility Model Content

[0004] This utility model addresses the shortcomings of existing technologies by providing a multi-push rod series fluid on / off control mechanism, achieving stronger driving force, smaller cylinder diameter, and better fault redundancy performance, thus solving the problems of large size, inconvenient installation, and inability to function properly after a malfunction in existing ceramic valves.

[0005] The technical solution to achieve the purpose of this utility model is: A multi-push-rod series fluid on / off control mechanism includes an air source input, a valve body locking seat, a valve body, a piston push rod, a cylinder piston rod, a return spring, a piston rod sealing ring, and an air passage sealing screw, wherein: The on / off component is mounted on the cylinder piston rod, which drives the on / off component to move and realize the control function of the sand passage on / off. The cylinder piston rod and at least one piston push rod are connected in series in the cylinder inside the valve body to form a series push rod assembly. The number of series push rods can be flexibly adjusted according to the actual driving force requirements. Sealing rings are installed at the contact points between the cylinder piston rod and the cylinder inside the valve body, and at the contact points between the piston push rod and the cylinder. Through the sealing effect of the sealing element, gas leakage inside the cylinder is prevented, ensuring that the air pressure can effectively act on the push rod assembly. The valve body is also equipped with an air passage. The output end of the air source input is connected to the air passage. The air passage sealing screw is installed at the air passage port at the end of the valve body to seal the air passage and prevent gas from leaking from the air passage connection. The return spring is installed inside the cylinder. One end of it is fixedly connected to the series push rod assembly (piston push rod or cylinder piston rod), and the other end is in contact with the inner wall of the valve body. It is used to drive the series push rod assembly to move in the opposite direction to reset when the air source stops input.

[0006] The switching component is made of ceramic sheet, and the surface roughness of the ceramic sheet is less than Ra0.2μm.

[0007] The number of piston push rods is no less than two. After multiple piston push rods are connected in series, one end is connected to the cylinder piston rod, and the other end extends to the end of the valve body near the air source input side.

[0008] The air passage inside the valve body has a branched structure, with the number of branched ports matching the number of piston push rods, and each branched port corresponding to the top force-bearing surface of a piston push rod.

[0009] The return spring is a cylindrical helical spring, initially in a slightly compressed state, and is sleeved on the piston rod or placed between the cylinder piston rod and the valve body.

[0010] The multi-push rod series fluid on / off control mechanism provided by this utility model has the following advantages compared with the prior art: 1. Optimization of pushing force and cylinder size: Through the structural design of multiple piston push rods connected in series with cylinder piston rods, the pushing force can be multiplied by the superposition of the force-bearing areas of multiple push rods when the cylinder diameter remains unchanged. If it is only necessary to maintain the same pushing force as existing technology, the cylinder diameter can be greatly reduced, effectively solving the installation and layout problem of "insufficient circumferential space but sufficient axial space" in dental equipment, and improving the compactness of the equipment structure. 2. Enhanced Fault Redundancy: The multiple piston push rods connected in series are independently and synchronously subjected to force. When one or more push rods malfunction (such as jamming), the driving force generated by the other normal push rods under air pressure can drive the faulty push rod to reciprocate together. This can not only release the jammed state of the faulty push rod, but also ensure the normal operation of the series push rod assembly as a whole, ensuring that the ceramic valve can continuously control the sand powder flow and ensuring the stable operation of the dental sandblasting equipment. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of a multi-push rod series fluid on / off control mechanism. In the diagram: 1. Air source input 2. Valve body locking seat 3. Air passage sealing screw 4. Valve body 5. Sealing ring 6. Cylinder piston rod 7. On / off assembly 8. Return spring 9. Piston push rod 10. Air passage. Detailed Implementation

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this is not intended to limit the present invention. Example

[0013] like Figure 1 As shown, a multi-push rod series fluid on / off control mechanism mainly consists of an air source input 1, a valve body locking seat 2, a valve body 4, a piston push rod 9, a cylinder piston rod 6, a sealing ring 5, a return spring 8, and an air circuit sealing screw 3.

[0014] The on / off assembly 7 is mounted on the cylinder piston rod 6. The cylinder piston rod 6 drives the on / off assembly 7 to move, jointly undertaking the control function of opening and closing the sand passage. Multiple piston push rods 9 can be provided and are installed in series with the cylinder piston rod 6 in the cylinder inside the valve body 4. Sealing rings 5 ​​are installed at the contact points between the cylinder piston rod 6, the piston push rod 9 and the cylinder to ensure the airtightness of the cylinder and prevent gas leakage from affecting the pushing effect.

[0015] The air passage sealing screw 3 is installed on the top of the cylinder of the valve body 4 to seal the air passage 10 inside the valve body 4 and prevent gas from leaking from the air passage connection. The return spring 8 is installed inside the cylinder of the valve body 4, with one end connected to the piston push rod 9 or the cylinder plug rod 6, and the other end fixed in the corresponding position of the cylinder inside the valve body 4, to drive the push rod assembly to reset when the air source stops input.

[0016] When the dental sandblasting equipment needs to spray sandblasting powder, the air source enters the cylinder inside the valve body 4 through the air source input 1. With the help of the air passage 10 inside the valve body 4, the gas is evenly distributed to different positions of the cylinder, and at the same time acts on multiple piston push rods 9 and cylinder plug rods 6 connected in series, generating a strong driving force, which drives the on / off component 7 to move, so that the through hole on the on / off component 7 is connected to the through hole of the on / off component, and the sandblasting powder is smoothly sprayed along the sand path.

[0017] When the equipment stops spraying, the air source stops input, the reset spring 8 releases its elastic potential energy, pulls the piston push rod 9 and the cylinder piston rod 6 to move in the opposite direction, the on / off component 7 resets, the through hole is opened, and the sandblasting powder stops being conveyed.

[0018] If one or more piston rods 9 become stuck, the driving force generated by the other normal piston rods 9 under air pressure can drive the stuck rod to move together, thereby releasing the stuck state and ensuring the ceramic valve continues to work normally.

Claims

1. A multi-push rod series fluid on / off control mechanism, comprising an air source input (1), a valve body locking seat (2), a valve body (4), a piston push rod (6), and a cylinder piston rod (9), characterized in that: The cylinder piston rod (6) and at least one piston push rod (9) are connected in series in the cylinder inside the valve body (4). The on / off assembly (7) is located on the cylinder piston rod (6) and is driven by the cylinder piston rod (6). A seal (5) is installed between the cylinder piston rod (6), the piston push rod (9) and the cylinder inside the valve body (4). The cylinder end inside the valve body (4) is provided with an air passage. The air source input (1) is connected to the air passage. The gas can be driven by the air passage to move multiple piston push rods (6) and cylinder piston rods (9) connected in series.

2. The multi-push rod series fluid on / off control mechanism according to claim 1, characterized in that, The switching component (7) is a ceramic sheet made of ceramic material.

3. The multi-push rod series fluid on / off control mechanism according to claim 2, characterized in that, The surface roughness of the ceramic sheet is less than Ra0.2μm.

4. The multi-push rod series fluid on / off control mechanism according to claim 1, characterized in that, The valve body is also provided with a reset spring (8). The reset spring (8) is installed inside the valve body (8). One end of the reset spring (8) is connected to the piston push rod (6) or the cylinder piston rod (9), and the other end is in contact with the inner wall of the valve body (4) to drive the piston push rod (6) and the cylinder piston rod (9) to reset.

5. The multi-push rod series fluid on / off control mechanism according to claim 1, characterized in that, The valve body (4) is also provided with an air passage (10), the output end of the air source input (1) is connected to the air passage (10), and the air passage sealing screw (3) is installed at the air passage port at the end of the valve body.

6. The multi-push rod series fluid on / off control mechanism according to claim 1, characterized in that, The number of piston push rods (9) is not less than two. After multiple piston push rods (9) are connected in series, one end is connected to the cylinder piston rod (6), and the other end extends to the end of the valve body (4) near the side of the air source input (1).

7. The multi-push rod series fluid on / off control mechanism according to claim 1, characterized in that, The air passage (10) inside the valve body (4) has a bifurcated structure. The number of bifurcated ports is the same as the number of piston push rods (9), and each bifurcated port corresponds to the top force-bearing surface of a piston push rod (9).

8. The multi-push rod series fluid on / off control mechanism according to claim 4, characterized in that, The reset spring (8) is a cylindrical helical spring, initially in a slightly compressed state, and is sleeved on the piston rod (6) or placed between the cylinder piston rod (9) and the valve body (3).

9. A multi-push rod series fluid on / off control mechanism according to claim 1, characterized in that, The sealing element is a sealing ring.

10. A multi-push rod series fluid on / off control mechanism according to any one of claims 1-9, characterized in that, The push rod assembly formed by the cylinder piston rod (6) and the piston push rod (9) in series moves synchronously under the action of air pressure, driving the on / off assembly to move, so as to realize the connection or disconnection of the through hole on the on / off assembly with the through hole of the on / off assembly.

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