Dustproof gate valve

Abstract

A dustproof gate valve includes: a housing; two swing arms, one end of which is disposed on both sides of a movable ring, with a plurality of elastic elements provided between the movable ring and a second plate; a sliding valve plate having a plate body and two roller assemblies, each roller assembly having an arm roller for rolling against the two swing arms respectively; and a driver. Each of the two swing arms has a pressure flange, and a closing positioning groove and an opening positioning groove formed by the recess of the pressure flange, allowing the arm rollers of the two roller assemblies to roll against or into the groove. When the arm roller of the two roller assemblies rolls into the opening positioning groove, the movable ring pushes against the first plate, and a sealing ring abuts against the first plate to achieve a seal.

Description

Technical Field

[0001] This invention relates to gate valves, and in particular to a dustproof gate valve. Prior Technology

[0002] Taiwan Patent No. TW I551798, corresponding to US Patent No. 9,464,721, discloses a gate valve with a locking function. This patent mainly uses an actuator to drive a rocker arm, which in turn drives a slide to move. When the rocker arm moves to the second locking position, the valve on the slide closes its valve port, achieving the effect of locking the valve at the same time as closing.

[0003] However, if the technology mentioned above is used in a relatively dirty environment, such as an environment with a lot of dust, it can achieve the effect of sealing and blocking dust when closed, but when opened, since the valve is away from the valve port and the valve port is connected to the internal space of the gate valve, dust will easily enter the gate valve through the valve port and contaminate the internal components of the gate valve.

[0004] Taiwan Patent No. TW I716250, corresponding to the US Patent No. US 11,112,012 B2, discloses a gate valve with a dustproof function. This patent mainly uses a dustproof tube (Figure 41) to block the gap between the valve port and the gate valve body when the valve is opened, thereby preventing dust from easily entering the gate valve.

[0005] However, although the aforementioned case pertains to prior art as claimed by the applicant in this case, its structure could be further simplified. For example, the dustproof effect could be achieved without using a dustproof tube. Furthermore, the simplification of the structure could also result in different operating states, thus becoming the issue that this case seeks to address. Summary of the Invention

[0006] The main objective of this invention is to provide a dustproof gate valve that can maintain its dustproof effect when opened without using a dustproof pipe.

[0007] To achieve the above objectives, the present invention provides a dustproof gate valve, comprising: a housing having a first plate and a second plate, wherein the housing has an accommodating space located between the first plate and the second plate, the first plate having a through first valve port; two swing arms, parallel to each other and each pivotally mounted within the housing with one end rotatably, the remaining portions of the two swing arms being located within the accommodating space, the other ends of the two swing arms being located on both sides of a movable ring, the movable ring forming a second valve port, and being movably mounted on the second plate in a manner that allows it to move away from or towards the first plate, the first valve port and the second valve port facing each other, and the movable ring and the second plate being in an airtight relationship, the portion of the movable ring facing the first plate having an abutment. The first plate has a sealing ring on its contact surface, and a plurality of elastic elements are provided between the movable ring and the second plate. The elastic restoring force causes the movable ring to move toward the first plate. A sliding valve plate has a plate body and two roller sets respectively disposed on both sides of the plate body and moving with the plate body. Each roller set has a plurality of plate rollers for rolling against the first plate, and each of the two roller sets has an arm roller for rolling against the two swing arms. A driver is disposed on either the first plate or the second plate, and the driver is connected to the sliding valve plate to drive the sliding valve plate to move within the accommodating space, thereby causing the two roller sets to move relative to the two swing arms. Each of the two swing arms has a pressing edge and a bearing formed by the pressing edge. The recess forms a closed positioning groove and an open positioning groove, allowing the arm rollers of the two roller assemblies to roll against or into them. The closed positioning groove is positioned between the open positioning groove and the movable ring. When the arm rollers of the two roller assemblies roll into the open positioning groove, the plate system is not located between the movable ring and the first plate, and the plurality of elastic members hold the movable ring against the first plate, achieving a seal by the sealing ring against the first plate. At this time, the first valve port and the second valve port are connected, allowing gas to pass through, but the gas will not enter the accommodating space due to the sealing relationship of the sealing ring. When the arm rollers of the two roller assemblies roll against the pressure edge but do not roll into the open or closed positioning groove, The arm rollers of the two roller assembly press down on the two swing arms to make them swing, thereby forcing the movable ring to overcome the elastic force of the plurality of elastic members and move the movable ring away from the first plate, thus creating a gap between the movable ring and the first plate, allowing the plate body to enter; wherein, when the arm rollers of the two roller assembly roll into the closing positioning groove, the plate body enters between the movable ring and the first plate and completely covers the first valve port, the plurality of elastic members keep the movable ring pushing against the plate body and complete the seal by the sealing ring against the plate body, at this time the first valve port and the second valve port are separated by the plate body and are not connected, so gas cannot pass through, and gas will not enter the accommodating space through the second valve port due to the sealing relationship of the sealing ring.

[0008] Therefore, the present invention achieves an airtight effect by using the sealing ring to abut against the first plate, which can effectively prevent dust and maintain the dustproof effect when opened without the need for a dustproof tube, thus achieving the aforementioned objective of the present invention. Simple Explanation of the Diagram

[0009] Figure 1 is a perspective view of the first preferred embodiment of the present invention. Figure 2 is a partially cutaway perspective view of the first preferred embodiment of the present invention. Figure 3 is a top view of the internal structure of the first preferred embodiment of the present invention, showing the internal state after the shell is removed. Figure 4 is a partial cross-sectional view of Figure 3, mainly showing the arc-shaped concave part of the plate. Figure 5 is a sectional view along section line 5-5 in Figure 3. Figure 6 is a cross-sectional view along section line 6-6 in Figure 3. Figure 7 is a magnified view of a portion of Figure 6. Figure 8 is a schematic diagram of the operation of the first preferred embodiment of the present invention, and its perspective is similar to that of Figure 5. Figure 9 is a magnified view of a portion of Figure 8. Figure 10 is another schematic diagram of the operation of the first preferred embodiment of the present invention, and its perspective is similar to that of Figure 5. Figure 11 is a magnified view of a portion of Figure 10. Figure 12 is a perspective view of another embodiment of the first preferred embodiment of the present invention. Figure 13 is a perspective view of the second preferred embodiment of the present invention. Figure 14 is a sectional view along section line 14-14 in Figure 13. Implementation

[0010] To illustrate the technical features of this invention in detail, the following preferred embodiments are described below with reference to the accompanying drawings, wherein:

[0011] As shown in Figures 1 to 7, the present invention describes a dustproof gate valve 10 through a first preferred embodiment, which mainly consists of a housing 11, two swing arms 21, a sliding valve plate 31, and a driver 41, wherein:

[0012] The housing 11 has a first plate 12 and a second plate 16, and a receiving space 19 is located between the first plate 12 and the second plate 16 within the housing 11. The first plate 12 has a through first valve port 121. In this first embodiment, the first plate 12 has a first flange 13, and the first valve port 121 is formed on the first flange 13. The second plate 16 has a second flange 17.

[0013] The two swing arms 21 are parallel to each other and each is pivotally mounted in the housing 11 with one end rotatably. The rest of the two swing arms 21 are located in the accommodating space 19. The other end of the two swing arms 21 is located on both sides of a movable ring 25. The movable ring 25 forms a second valve port 251 and is movably mounted on the second flange 17 in a manner that allows it to move away from or towards the first plate 12. The first valve port 121 and the second valve port 251 face each other, and the movable ring 25 and the second flange 17 are in an airtight relationship. The portion of the movable ring 25 facing the first plate 12 has an abutment surface 26, on which a sealing ring 261 is provided. A plurality of elastic elements 27 are provided between the movable ring 25 and the second flange 17. In this first embodiment, a spring is used as an example. Its elastic restoring force causes the movable ring 25 to move towards the first plate 12. In this first embodiment, both the first valve port 121 and the second valve port 251 are circular perforations.

[0014] The sliding valve plate 31 has a plate body 32 and two roller groups 34 respectively disposed on both sides of the plate body 32 and moving together with the plate body 32. Each roller group 34 has a plurality of plate rollers 341 for rolling against the first plate 12, and each of the two roller groups 34 has an arm roller 342 for rolling against the two swing arms 21 respectively. The arm rollers 342 of each roller group 34 are located between the first plate 12 and the two swing arms 21. In this first embodiment, the plate body 32 has an arc-shaped recess 321 recessed inward from one edge, and the arc-shaped recess 321 faces the first valve port 121.

[0015] The actuator 41, located on the first plate 12, is connected to the sliding valve plate 31 and drives the sliding valve plate 31 to move within the accommodating space 19, thereby causing the two roller assembly 34 to move relative to the two swing arms 21. In this first embodiment, the actuator 41 has a knob 42 and a connecting arm 44. The plate 32 has a drive groove 323. The outer end of the connecting arm 44 has a slider 441 located within the drive groove 323. The knob 42 is operated to drive the outer end of the connecting arm 44 to perform a circular motion. The slider 441 moves along the drive groove 323, acting on the groove wall of the drive groove 323, thereby moving the plate 32. This structure allows the user to manually operate the knob 42 to actuate the plate 32. However, the aforementioned actuator 41 can also be replaced by a pneumatic device such as an air compressor, or an electric device such as a motor in conjunction with a screw, depending on the requirements. Since this can be directly understood from the existing known technology, it is not required to show it in the diagram.

[0016] Each of the two swing arms 21 has a pressing edge 211, and a closing positioning groove 22 and an opening positioning groove 24 formed by the recess of the pressing edge 211, allowing the arm rollers 342 of the two roller assemblies 34 to roll into or against the groove. The closing positioning groove 22 is positioned between the opening positioning groove 24 and the movable ring 25. In this first embodiment, the bottom of both the opening positioning groove 24 and the closing positioning groove 22 is arc-shaped, which facilitates the arm rollers 342 to fit in shape after rolling in. This not only allows the arm rollers 342 to be at their maximum depth after rolling in, but also makes it easier for the arm rollers 342 to roll out.

[0017] When the arm roller 342 of the two roller assembly 34 rolls into the opening positioning groove 24, the plate 32 is not located between the movable ring 25 and the first plate 12, and the plurality of elastic members 27 keep the movable ring 25 pressed against the first flange 13 of the first plate 12, and the sealing ring 261 abuts against the first flange 13 to complete the seal. At this time, the first valve port 121 and the second valve port 251 are connected, allowing gas to pass through, but gas or dust will not enter the accommodating space 19 due to the sealing relationship of the sealing ring 261.

[0018] When the arm roller 342 of the second roller group 34 rolls against the pressure edge 211 and does not roll into the opening positioning groove 24 or the closing positioning groove 22, the arm roller 342 of the second roller group 34 presses the two swing arms 21 to swing by rolling against the pressure edge 211, thereby forcing the movable ring 25 to overcome the elastic force of the plurality of elastic members 27 and move the movable ring 25 away from the first plate 12, thereby forming a gap S between the movable ring 25 and the first plate 12, which allows the plate body 32 to enter.

[0019] When the arm roller 342 of the second roller group 34 rolls into the closing positioning groove 22, the plate 32 enters between the movable ring 25 and the first plate 12 and completely covers the first valve port 121. The plurality of elastic members 27 keep the movable ring 25 pushing against the plate 32 and complete the sealing by the sealing ring 261 against the plate 32. At this time, the first valve port 121 and the second valve port 251 are separated by the plate 32 and do not communicate with each other, so gas cannot pass through. Moreover, gas will not enter the accommodating space 19 through the second valve port 251 due to the sealing relationship of the sealing ring 261.

[0020] In this first embodiment, the first plate 12 and the second plate 16 are combined to form two sidewalls 191 located on both sides of the accommodating space 19, and each roller assembly 34 further has a plurality of side rollers 343 for rolling against the two sidewalls 191. This structure facilitates the two roller assemblies 34 in stabilizing the sliding valve plate 31 within the accommodating space 19 by means of the plurality of side rollers 343. However, the aforementioned plurality of side rollers 343 can also be omitted. For example, when an air compressor or screw motor is used as the actuator 41 (not shown in the figure), since the actuator 41 itself has directional properties during driving, the rolling guidance of the plurality of side rollers 343 is not required.

[0021] The structure of this first embodiment has been described above. Next, the operational state of this first embodiment will be described.

[0022] As shown in Figures 1 to 7, the open state is displayed. At this time, the arm roller 342 of the two roller assembly 34 is located within the open positioning groove 24. The sealing ring 261 abuts against the first flange 13 to form a seal. The plate 32 is located within the accommodating space 19 but does not enter between the movable ring 25 and the first plate 12. The first valve port 121 communicates with the second valve port 251, allowing gas (not shown) to pass through. However, due to the sealing relationship between the sealing ring 261 and the first flange 13, the gas will not enter the accommodating space 19. This provides a dustproof effect in the open state. The arc-shaped recess 321 of the plate 32 does not interfere with the first flange 13, but allows some structures on both sides of the plate 32 to be closer to the first valve port 121, thereby shortening the overall required stroke of the plate 32 and reducing the overall structural length. However, the arc-shaped recess 321 may be omitted, depending on actual needs.

[0023] Figures 8 and 9 illustrate the process of transitioning from the open state to the closed state. At this time, the user operates the actuator 41 to force the sliding valve plate 31 to move. The arm roller 342 of the two roller assembly 34 rolls out of the open positioning groove 24 and abuts against the pressure flange 211, but has not yet entered the closed positioning groove 22. Therefore, the two swing arms 21 are forced to swing, causing the movable ring 25 to overcome the restoring elastic force of the plurality of elastic elements 27 and move away from the first flange 13. A gap S is formed between the movable ring 25 and the first flange 13, allowing the plate 32 to enter.

[0024] As shown in Figures 10 and 11, the device is in the closed state. At this time, the arm roller 342 of the two roller assembly 34 is located within the closed positioning groove 22, and the plate 32 is positioned between the movable ring 25 and the first flange 13, completely covering the first valve port 121. The plurality of elastic members 27 push the movable ring 25 to cause the sealing ring 261 to abut against the plate 32. This effectively closes the first valve port 121. At this time, the first valve port 121 and the second valve port 251 are blocked by the plate 32 and cannot communicate, preventing gas from passing through. Similarly, due to the sealing relationship of the sealing ring 261, gas will not enter the accommodating space 19 through the second valve port 251.

[0025] To switch from the off state to the on state, simply reverse the above steps.

[0026] In the aforementioned operation, the rolling relationship between the arm roller 342 of the two roller assembly 34 and the opening positioning groove 24, closing positioning groove 22 and pressure edge 211 of the two swing arms 21 plays a key role. When the arm roller 342 rolls against the pressure edge 211, it forces the two swing arms 21 to swing downward (taking the direction in Figure 9 as an example). However, when the arm roller 342 is located in the opening positioning groove 24 or the closing positioning groove 22, its depth prevents the two swing arms 21 from being pressed downward, thereby allowing the plurality of elastic members 27 to push the movable ring 25 upward so that its sealing ring 261 abuts against the first flange 13 or the plate 32 to form an airtight relationship.

[0027] As can be seen from the above, in this first embodiment, when opened, the sealing ring 261 can abut against the first flange 13 to form an airtight effect, which can effectively prevent dust. It can maintain the dust prevention effect when opened without the need to use a dustproof tube, thus solving the problems encountered in the prior art.

[0028] In the aforementioned first embodiment, both the first flange 13 and the second flange 17 are circular. However, they can also be made into other shapes as needed, such as the first flange 13' and the second flange 17' which are rectangular as shown in FIG12, so that the first valve port 121' and the second valve port 251' are both rectangular. In this case, the movable ring (not shown in the figure) is also rectangular.

[0029] As shown in Figures 13 and 14, the present invention describes a dustproof gate valve 10'' through a second preferred embodiment, which is mainly the same as the aforementioned first embodiment, except that:

[0030] The first plate 12'' does not have the first flange as in the first embodiment, but instead directly forms the first valve port 121'' and a mating surface 122''. When the movable ring 25'' abuts against the first plate 12'', the sealing ring 261'' abuts against the mating surface 122'' to produce a sealing effect, thereby providing a dustproof effect.

[0031] The aforementioned structure of this second embodiment can still provide a dustproof effect when the first flange is not required.

[0032] The remaining structure and effects of this second embodiment are the same as those of the first embodiment described above, and will not be repeated hereafter.

[0033] The above description is merely an illustration of the present invention through embodiments and cannot be used to limit the scope of the patent application of the present invention. Any simple variations or equivalent implementations made in accordance with the scope of the patent application and the contents of the patent specification of the present invention should be covered by the scope of the patent application of the present invention.

[0034] 10: Dustproof gate valve 11: Shell 12: First board 121: First valve port 13: First flange 16: Second board 17: Second flange 19: Storage space 191: Sidewall 21: Arm Swing 211: Pressure Edge 22: Close the positioning slot 24: Open the positioning slot 25: Activity Ring 251: Second valve port 26: Contact surface 261: Sealing ring 27: Elastic component 31: Sliding valve plate 32:Plate body 321: Arc-shaped concave part 323: Drive slide 34: Roller Set 341: Plate Roller 342: Arm Roller 343: Side Roller 41: Driver 42: Knob 44: Linkage boom 441: Slider S: Gap 121': First valve port 13': First flange 17': Second flange 251': Second valve port 10'': Dustproof gate valve 12'': First board 121'': First valve port 122'': Dating surface 25'': Activity ring 261'': Sealing ring

Claims

1. A dustproof gate valve, comprising: a housing having a first plate and a second plate, wherein the housing has an accommodating space located between the first plate and the second plate, the first plate having a through first valve port; two swing arms, parallel to each other and each pivotally mounted within the housing at one end, the remaining portions of the two swing arms being located within the accommodating space, the other ends of the two swing arms being disposed on both sides of a movable ring, the movable ring forming a second valve port, and being movably disposed on the second plate such that it can be moved away from or towards the first plate, the first valve port and the second valve port facing each other, and the movable ring and the second plate being in an airtight relationship, the portion of the movable ring facing the first plate having an abutment surface, a sealing ring being disposed on the abutment surface, and a plurality of elastic members being disposed between the movable ring and the second plate, the elastic restoring force of which... The system moves the movable ring toward the first plate; a sliding valve plate has a plate body and two roller groups respectively disposed on both sides of the plate body and move with the plate body, each roller group having a plurality of plate rollers for rolling against the first plate, and each of the two roller groups having an arm roller for rolling against the two swing arms respectively; and a driver, disposed on one of the first plate or the second plate, the driver being connected to the sliding valve plate for driving the sliding valve plate to move within the accommodating space, thereby causing the two roller groups to move relative to the two swing arms; characterized in that: each of the two swing arms has a pressing edge, and a closing positioning groove and an opening positioning groove formed by the recess of the pressing edge, which allow the arm rollers of the two roller groups to roll against or roll into, the closing positioning groove being positioned between the opening positioning groove and the movable ring; wherein. When the arm roller of the two roller assembly rolls into the opening positioning groove, the plate system is not located between the movable ring and the first plate, and the plurality of elastic members keep the movable ring pressed against the first plate and achieve a seal by the sealing ring against the first plate. At this time, the first valve port and the second valve port are connected, allowing gas to pass through, but the gas will not enter the accommodating space due to the sealing relationship of the sealing ring. When the arm roller of the two roller assembly rolls against the pressure edge but does not roll into the opening or closing positioning groove, the arm roller of the two roller assembly presses down on the two swing arms to make them swing, thereby forcing the movable ring to overcome the... The elastic force of the multiple elastic elements moves the movable ring away from the first plate, thereby creating a gap between the movable ring and the first plate, allowing the plate body to enter. When the arm roller of the two roller group rolls into the closing positioning groove, the plate system enters between the movable ring and the first plate and completely covers the first valve port. The multiple elastic elements keep the movable ring pressed against the plate body, and the sealing ring abuts against the plate body to complete the seal. At this time, the first valve port and the second valve port are separated by the plate body and are not connected, so gas cannot pass through. Moreover, due to the sealing relationship of the sealing ring, gas will not enter the accommodating space through the second valve port.

2. The dustproof gate valve according to claim 1, wherein: The driver has a knob and a linkage arm, and the plate has a drive groove. The outer end of the linkage arm has a slider located in the drive groove. The knob is operated to drive the outer end of the linkage arm to perform a circular motion. The slider moves along the drive groove to act on the groove wall of the drive groove, thereby driving the plate to move.

3. The dustproof gate valve according to claim 1, wherein: The first valve port and the second valve port are circular perforations. The plate system has an arc-shaped recessed part from one edge inward, and the arc-shaped recessed part faces the first valve port.

4. The dustproof gate valve according to claim 1, wherein: The first valve port and the second valve port are rectangular through holes.

5. The dustproof gate valve according to claim 1, wherein: The first plate has a first flange, and the first valve port is formed on the first flange. When the arm roller of the two roller group rolls into the opening positioning groove, the plurality of elastic members keep the movable ring pushing against the first flange and complete the sealing by the sealing ring.

6. The dustproof gate valve according to claim 1, wherein: The second plate has a second flange, and the movable ring system is movably disposed on the second flange and maintains an airtight relationship with the second flange.

7. The dustproof gate valve according to claim 1, wherein: The first plate and the second plate are combined to form two side walls located on both sides of the accommodating space, and each roller assembly further has a plurality of side rollers for rolling against the two side walls.

8. The dustproof gate valve according to claim 1, wherein: The bottom of both the opening and closing positioning slots is arc-shaped.

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