An integrated multi-way synchronous switching valve and switching method

Abstract

The present invention discloses an integrated multi-way synchronous switching valve and a switching method. The integrated multi-way synchronous switching valve includes a multi-way synchronous valve body, a multi-way synchronous valve spool, a driving piston cylinder, a driving piston, and a driving air source. The multi-way synchronous valve body is provided with multiple groups of large cylindrical through holes of the same diameter, symmetrically distributed along the length and width directions. The driving piston cylinder is symmetrically provided with multiple large cylindrical blind holes along the center line of the length direction. The driving piston cylinder has two small cylindrical through holes at the center line of the width direction, corresponding to the positions of the two small cylindrical through holes of the multi-way synchronous valve body, forming a gas passage. The driving piston moves within the large cylindrical blind holes of the driving piston cylinder under the driving pressure provided by the driving air source, pushing the multi-way synchronous valve spool to move within the multi-way synchronous valve body, thereby switching the multi-way synchronous switching valve between two working positions. The present invention can realize the multi-way synchronous switching function, is compact, and has high execution reliability.

Description

Technical Field

[0001] The present invention belongs to the technical field of pneumatic transmission, and in particular relates to an integral multi-way synchronous switching valve and a switching method. Background Art

[0002] With the development of gas pressure testing technology, the demand for high-integration and high-density pressure measuring instruments is becoming more and more widespread. The pressure scanning valve is a pressure testing instrument widely used in wind tunnel tests, engine test benches, and building wind load tests. This type of pressure scanning monitoring instrument is generally multi-channel (16 channels and above) and can realize multi-channel synchronous measurement and calibration (purge) and other functions. That is, when the pressure scanning valve is in working measurement, it can realize the function of independent measurement of 16 channels, that is, the multi-channel independent channel measurement function is the basic function of the pressure scanning valve.

[0003] However, as a highly integrated pressure scanning valve, it can measure multiple (more than 16) pressure signals, which means that it has to introduce the gas in multiple pressure inlet pipelines into the corresponding pressure sensors. Pressure instruments generally have time drift and temperature drift due to their own sensitive components and circuit structure. If the method of disassembling the pipeline is used to reset it, it will not only bring a lot of workload, but also have the potential risk of affecting the air tightness of the pipeline. In addition, the pressure scanning valve, as a measuring instrument, needs to be calibrated periodically, and there is also the disadvantage of disassembly. Even if the workload and impact of these disassembly are put aside, if single-channel calibration is used one by one when calibrating it, the doubling of the workload is self-evident. This requires the pressure scanning valve to have a multi-channel synchronous calibration function, that is, the multi-channel sensors can be synchronously connected to one gas channel to achieve synchronous zeroing and periodic calibration. In addition, the pressure scanning valve will inevitably be contaminated during operation and the pipeline needs to be cleaned and purged synchronously, that is, another set of multi-channel connections must be realized.

[0004] In summary, the pressure scanning valve needs to realize synchronous measurement and calibration (purge) functions through a multi-way synchronous switching valve, that is, in the measurement state, the multiple channels are independent, and in the calibration state, a group of multiple channels are connected to realize the purge function and clean the pipeline; a group of multiple channels are connected to realize the synchronous calibration and zeroing of all sensors.

[0005] At present, the reversing valves widely used in the market are realized by integrated valves, that is, the reversing valve, oil inlet check valve, safety valve, overload valve, oil replenishing valve and the like are integrated. The multi-way reversing valve is formed by combining these reversing valves in parallel, series or series-parallel. The control mode can be manual or solenoid valve control, hydraulic control, electro-hydraulic control, proportional solenoid control and computer control, etc. However, these integrated valves are relatively large in size and synchronization is not easy to ensure, and cannot meet the requirements of multi-way synchronous measurement and calibration (purging) of pressure scanning valves and high integration. Summary of the Invention

[0006] The object of the present invention is to provide an integrated multi-way synchronous switching valve and a switching method, which can realize the multi-way synchronous switching function, has a small size and high execution reliability.

[0007] In order to achieve the above-mentioned object, one aspect of the present invention provides an integrated multi-way synchronous switching valve, comprising a multi-way synchronous valve body, a multi-way synchronous valve spool, a driving piston cylinder, a driving piston and a driving air source;

[0008] The multi-way synchronous valve body is provided with a plurality of large cylindrical through holes of the same diameter symmetrically distributed along the length and width directions, which serve as the movement track of the multi-way synchronous valve spool. The number of the multi-way synchronous valve spool and the large cylindrical through holes of the multi-way synchronous valve body are matched;

[0009] The large cylindrical through hole is provided with a first small cylindrical blind hole staggered in the vertical direction of the upper and lower parts, and a first small cylindrical through hole is provided in the vertical direction of the left and right parts. Two second small cylindrical through holes are provided at the symmetrical center position of the large cylindrical through hole, and the second small cylindrical through holes intersect the first small cylindrical through hole perpendicularly.

[0010] The driving piston cylinder is symmetrically provided with a plurality of large cylindrical blind holes along the center line of the length direction. The large cylindrical blind holes serve as tracks for the driving piston to move. The driving air source provides driving pressure for the driving piston.

[0011] A second small cylindrical blind hole is provided at the bottom of the large cylindrical blind hole, which is concentric with the large cylindrical blind hole. The second small cylindrical blind hole is connected to a third small cylindrical blind hole perpendicular to the large cylindrical blind hole. The second small cylindrical blind hole and the third small cylindrical blind hole are the air paths for the driving air source to push the driving piston.

[0012] There are two third small cylindrical through holes at the center line of the driving piston cylinder along the width direction, which correspond to the positions of the two second small cylindrical through holes of the multi-way synchronous valve body to form a gas passage;

[0013] The driving piston moves in the large cylindrical blind hole of the driving piston cylinder under the push of the driving pressure provided by the driving air source, pushing the valve core of the multi-way synchronous valve to move in the valve body of the multi-way synchronous valve, thereby realizing the switching of the two working positions of the multi-way synchronous switching valve.

[0014] Preferably, the multi-way synchronous valve core includes a first multi-way synchronous valve core and a second multi-way synchronous valve core, the first multi-way synchronous valve core is provided with evenly distributed grooves, the second multi-way synchronous valve core is provided with three grooves with unequal spacings, and radial O-rings are provided on the grooves.

[0015] Preferably, the integral multi-way synchronous switching valve also includes a side cover plate, threaded holes are provided at the centers of the two side surfaces of the multi-way synchronous valve body, a step hole is provided at the center position of the side cover plate, and a first screw is provided on the step hole. The first screw connects the side cover plate and the multi-way synchronous valve body together through the step hole on the side cover plate and the threaded hole on the side surface of the multi-way synchronous valve body.

[0016] Preferably, threaded holes are symmetrically provided on both end faces of the multi-way synchronous valve body, and step holes are provided on the left and right sides of the large cylindrical blind hole. A second screw is provided on the step hole, and the second screw connects the driving piston cylinder and the multi-way synchronous valve body together through the step hole on the driving piston cylinder and the threaded hole on the end face of the multi-way synchronous valve body.

[0017] Preferably, the first small cylindrical blind hole, the first small cylindrical through hole and the second small cylindrical through hole are all provided with step holes in the outward direction, and axial O-rings are provided on the step holes.

[0018] Preferably, a groove is provided on the outer circumference of the driving piston, and a radial O-ring is provided on the groove to achieve sealing between the driving piston and the driving piston cylinder.

[0019] Another aspect of the present invention provides a switching method of an integrated multi-way synchronous switching valve, which uses the above-mentioned integrated multi-way synchronous switching valve to achieve multi-way synchronous switching, including:

[0020] Connect the driving air source to the left driving piston cylinder, turn on the driving air source, and adjust the driving air source pressure to the driving pressure value. The driving pressure generated by the driving air source reaches the driving piston instantly and synchronously through the second small cylindrical blind hole and the third small cylindrical blind hole on the driving piston cylinder. The driving piston pushes the spool of the multi-way synchronous valve to instantly and synchronously complete the working position switching. At this time, the valve body of the multi-way synchronous valve forms multiple independent channels for the upper and lower passages.

[0021] Connect the driving air source to the right driving piston cylinder, turn on the driving air source, and adjust the driving air source pressure to the driving pressure value. The driving pressure generated by the driving air source reaches the driving piston instantly and synchronously through the second small cylindrical blind hole and the third small cylindrical blind hole on the driving piston cylinder. The driving piston pushes the spool of the multi-way synchronous valve to instantly and synchronously complete the working position switching. At this time, the upper and lower channels of the multi-way synchronous valve body are all disconnected, all channels in the upper half of the multi-way synchronous valve body are connected, and all channels in the lower half of the multi-way synchronous valve body are connected.

[0022] According to the above-mentioned aspects of the present invention, the integrated multi-way synchronous switching valve and the switching method realize the multi-way synchronous switching function through the precise mechanical structure of the multi-way synchronous valve body and the multi-way synchronous valve core, which has a small size and high execution reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the present invention, the following briefly introduces the drawings used in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive efforts.

[0024] Figure 1 This is a structural diagram of an integrated multi-way synchronous switching valve according to an embodiment of the present invention;

[0025] Figure 2 yes Figure 1 A-direction view.

[0026] Among them: 1-multi-way synchronous valve body, 2-first multi-way synchronous valve core, 3-second multi-way synchronous valve core, 4-side cover plate, 5-drive piston cylinder, 6-drive piston, 7-axial O-type sealing ring, 8-radial O-type sealing ring, 9-first screw, 10-second screw, 11-drive air source. DETAILED DESCRIPTION

[0027] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0028] One embodiment of the present invention provides an integrated multi-way synchronous switching valve, such as Figure 1 and Figure 2 As shown, the integral multi-way synchronous switching valve of an embodiment of the present invention includes a multi-way synchronous valve body 1, a multi-way synchronous valve valve core, a side cover plate 4, a driving piston cylinder 5, a driving piston 6, an axial O-ring 7, a radial O-ring 8, a first screw 9, a second screw 10, and a driving air source 11.

[0029] The multi-way synchronous valve body 1 is provided with a plurality of large cylindrical through holes 12 of the same diameter that are symmetrically distributed along the length and width directions, which serve as the movement track of the multi-way synchronous valve spool. The large cylindrical through hole 12 is provided with a first small cylindrical blind hole 13 in a staggered manner in the vertical direction up and down, and a first small cylindrical through hole 14 in the vertical direction left and right. Two second small cylindrical through holes 15 are provided at the symmetrical center position of the large cylindrical through hole 12, and the second small cylindrical through hole 15 at the center position intersects perpendicularly with the first small cylindrical through hole 14 vertically left and right. The first small cylindrical blind hole 13 and the second small cylindrical through hole 15 form a measurement working state, and the first small cylindrical through hole 14 and the second small cylindrical through hole 15 form a calibration (purge) working state. The multi-way synchronous valve spool moves in the large cylindrical through hole 12. The first small cylindrical blind hole 13, the first small cylindrical through hole 14, and the second small cylindrical through hole 15 are all provided with stepped holes in the outward direction. Axial O-rings 7 are provided on the stepped holes to achieve axial sealing between the multi-way synchronous valve body 1 and its connecting parts. Threaded holes are symmetrically provided on both end surfaces of the multi-way synchronous valve body 1, and threaded holes are provided at the centers of both side surfaces of the multi-way synchronous valve body 1.

[0030] The multi-way synchronous valve spool matches the number of large cylindrical holes 12 in the multi-way synchronous valve body 1. The multi-way synchronous valve spool includes two types: a first multi-way synchronous valve spool 2 and a second multi-way synchronous valve spool 3. The first multi-way synchronous valve spool 2 is provided with evenly distributed grooves, while the second multi-way synchronous valve spool 3 is provided with three types of grooves with unequal spacing. The different groove arrangements enable the spool to cooperate with the valve body in different positions, enabling single-channel connection in the measurement state and multi-channel connection in the calibration (purging) state. A radial O-ring 8 is provided on the groove to achieve radial sealing between the multi-way synchronous valve spool and the multi-way synchronous valve body 1. The sharp edges of the multi-way synchronous valve spool are chamfered. A stepped hole is provided at the center of the side cover plate 4, and a first screw 9 is installed in the stepped hole. The first screw 9 connects the side cover plate 4 to the multi-way synchronous valve body 1 through the stepped hole in the side cover plate 4 and the threaded hole on the side of the multi-way synchronous valve body 1.

[0031] The drive piston cylinder 5 is symmetrically provided with multiple large cylindrical blind holes 16 along its longitudinal centerline. At the bottom of each large cylindrical blind hole 16 is a second small cylindrical blind hole 17, concentric with the large cylindrical blind hole 16. All of these second small cylindrical blind holes 17 are connected by a third small cylindrical blind hole 18, perpendicular to the large cylindrical blind hole 16. The large cylindrical blind hole 16 serves as a track for the movement of the drive piston 6. The second and third small cylindrical blind holes 17, 18, form the air path for the driving air source to propel the drive piston. Two third small cylindrical through-holes 19 are located along the widthwise centerline of the drive piston cylinder 5, corresponding to the two second small cylindrical through-holes 15 in the multi-way synchronous valve body 1, forming a gas passage. Stepped holes are provided on either side of the large cylindrical blind hole 16, each equipped with a second screw. These second screws connect the drive piston cylinder 5 to the multi-way synchronous valve body 1 through the stepped hole in the drive piston cylinder 5 and the threaded hole on the end face of the multi-way synchronous valve body 1. Driven by the driving pressure provided by the driving air source 11, the driving piston 6 moves within the large cylindrical blind hole 16 of the driving piston cylinder 5, pushing the first multi-way synchronous valve spool 2 and the second multi-way synchronous valve spool 3 within the multi-way synchronous valve body 1, thereby switching the multi-way synchronous switching valve between the two operating positions. The driving piston 6 is provided with a groove on its outer circumference, and a radial O-ring 8 is installed in this groove to achieve a seal between the driving piston 6 and the driving piston cylinder 5. The driving air source 11 provides driving pressure for the driving piston.

[0032] An embodiment of the present invention further provides a switching method of an integrated multi-way synchronous switching valve, which uses the integrated multi-way synchronous switching valve of the above embodiment to achieve multi-way synchronous switching, including:

[0033] Connect the driving air source 11 to the left driving piston cylinder 5, turn on the driving air source 11, adjust the pressure of the driving air source 11 to the driving pressure value, and the driving pressure generated by the driving air source 11 reaches the driving piston 6 instantly and synchronously through the second small cylindrical blind hole 17 and the third small cylindrical blind hole 18 on the driving piston cylinder 5. The driving piston 6 pushes the multi-way synchronous valve core to instantly and synchronously complete the working position switching ( Figure 1 In the figure, the two extreme positions of the valve core are the positions of the solid line and the dotted line), at this time, the first small cylindrical through hole 14 is independently connected, and the multi-way synchronous valve body 1 forms multiple independent channels for the upper and lower passages.

[0034] Connect the driving air source 11 and the right driving piston cylinder 5, turn on the driving air source 11, adjust the pressure of the driving air source 11 to the driving pressure value, and the driving pressure generated by the driving air source 11 reaches the driving piston 6 instantaneously and synchronously through the second small cylindrical blind hole 17 and the third small cylindrical blind hole 18 on the driving piston cylinder 5. The driving piston 6 pushes the spool of the multi-way synchronous valve to instantly and synchronously complete the working position switching. At this time, the upper and lower channels of the first small cylindrical through hole 14 are all disconnected, and all the first small cylindrical through holes 14 in the upper half of the multi-way synchronous valve body 1 are connected, and all the first small cylindrical through holes 14 in the lower half of the multi-way synchronous valve body 1 are connected.

[0035] To sum up, according to the embodiment of the present invention, the integral multi-way synchronous switching valve, the multi-way synchronous valve body and the multi-way synchronous valve core form a multi-way synchronous two-position multi-ventilation path, and the driving air source pushes the driving piston to drive the multi-way synchronous valve core to move. Through the precise air path design of the integral valve body and the ingenious coordination of the valve and core combination, the switching of the two functions is realized. Function one is multi-way independent connection, that is, the upper air port of the integral valve body is independently connected with the lower air port of the valve body through the action of the valve core, which satisfies the pressure scanning measurement function; Function two is that the upper air port of the integral valve body is disconnected from the lower air port of the valve body one by one through the action of the valve core, and at the same time, all the upper air ports of the integral valve body are connected, and all the lower air ports are connected, which satisfies the calibration (purge) function of the pressure scanning valve.

[0036] Therefore, the integrated multi-way synchronous switching valve and the switching method according to the embodiment of the present invention have the following beneficial effects:

[0037] 1. The present invention, through the design of precise air path mechanical structure, can realize multiple synchronous independent channels, and can also realize bidirectional multi-channel synchronous connection while disconnecting independent channels, thus solving the problem that the existing pneumatic transmission valve is large in size and only has the function of a single independent channel;

[0038] 2. The function switching of the present invention is achieved by driving the valve core through a driving air source, which has the advantages of small contact area, small friction and good synchronization, making up for the deficiency of the existing multi-way reversing valve in overcoming the large friction force of pushing the valve body;

[0039] 3. The present invention realizes multi-way synchronous connection and disconnection through valve core combination, has good functional switching synchronization and high reliability, and solves the problem of unsatisfactory synchronization of traditional combination valves.

[0040] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims.

Claims

1. An integrated multi-way synchronous switching valve, characterized in that: It includes a multi-way synchronous valve body, a multi-way synchronous valve core, a driving piston cylinder, a driving piston and a driving air source; The multi-way synchronous valve body is provided with a plurality of large cylindrical through holes of the same diameter symmetrically distributed along the length and width directions, which serve as the movement track of the multi-way synchronous valve spool. The number of the multi-way synchronous valve spool and the large cylindrical through holes of the multi-way synchronous valve body are matched; The large cylindrical through hole is provided with a first small cylindrical blind hole staggered in the vertical direction of the upper and lower parts, and a first small cylindrical through hole is provided in the vertical direction of the left and right parts. Two second small cylindrical through holes are provided at the symmetrical center position of the large cylindrical through hole, and the second small cylindrical through holes intersect the first small cylindrical through hole perpendicularly. The driving piston cylinder is symmetrically provided with a plurality of large cylindrical blind holes along the center line of the length direction. The large cylindrical blind holes serve as tracks for the driving piston to move. The driving air source provides driving pressure for the driving piston. A second small cylindrical blind hole is provided at the bottom of the large cylindrical blind hole, which is concentric with the large cylindrical blind hole. The second small cylindrical blind hole is connected to a third small cylindrical blind hole perpendicular to the large cylindrical blind hole. The second small cylindrical blind hole and the third small cylindrical blind hole are the air paths for the driving air source to push the driving piston. There are two third small cylindrical through holes at the center line of the driving piston cylinder along the width direction, which correspond to the positions of the two second small cylindrical through holes of the multi-way synchronous valve body to form a gas passage; The driving piston moves in the large cylindrical blind hole of the driving piston cylinder under the push of the driving pressure provided by the driving air source, pushing the valve core of the multi-way synchronous valve to move in the valve body of the multi-way synchronous valve, thereby realizing the switching of the two working positions of the multi-way synchronous switching valve.

2. The integrated multi-way synchronous switching valve according to claim 1, characterized in that: The multi-way synchronous valve core includes a first multi-way synchronous valve core and a second multi-way synchronous valve core. The first multi-way synchronous valve core is provided with evenly distributed grooves, and the second multi-way synchronous valve core is provided with three grooves with unequal spacing, and radial O-rings are provided on the grooves.

3. The integrated multi-way synchronous switching valve according to claim 1 or 2, characterized in that: It also includes a side cover plate, threaded holes are provided at the centers of the two side surfaces of the multi-way synchronous valve body, a step hole is provided at the center position of the side cover plate, a first screw is provided on the step hole, and the first screw connects the side cover plate and the multi-way synchronous valve body together through the step hole on the side cover plate and the threaded hole on the side surface of the multi-way synchronous valve body.

4. The integrated multi-way synchronous switching valve according to claim 1 or 2, characterized in that: Threaded holes are symmetrically provided at both end faces of the multi-way synchronous valve body, and step holes are provided on the left and right sides of the large cylindrical blind hole. A second screw is provided on the step hole. The second screw connects the driving piston cylinder and the multi-way synchronous valve body together through the step hole on the driving piston cylinder and the threaded hole on the end face of the multi-way synchronous valve body.

5. The integrated multi-way synchronous switching valve according to claim 1 or 2, characterized in that: The first small cylindrical blind hole, the first small cylindrical through hole and the second small cylindrical through hole are all provided with step holes in the outward direction, and axial O-type sealing rings are provided on the step holes.

6. The integrated multi-way synchronous switching valve according to claim 1 or 2, characterized in that: A groove is provided on the outer circumference of the driving piston, and a radial O-type sealing ring is provided on the groove to achieve sealing between the driving piston and the driving piston cylinder.

7. A switching method for an integrated multi-way synchronous switching valve, characterized in that: The integrated multi-way synchronous switching valve according to any one of claims 1 to 6 is used to realize multi-way synchronous switching, comprising: Connect the driving air source to the left driving piston cylinder, turn on the driving air source, and adjust the driving air source pressure to the driving pressure value. The driving pressure generated by the driving air source reaches the driving piston instantly and synchronously through the second small cylindrical blind hole and the third small cylindrical blind hole on the driving piston cylinder. The driving piston pushes the spool of the multi-way synchronous valve to instantly and synchronously complete the working position switching. At this time, the valve body of the multi-way synchronous valve forms multiple independent channels for the upper and lower passages. Connect the driving air source to the right driving piston cylinder, turn on the driving air source, and adjust the driving air source pressure to the driving pressure value. The driving pressure generated by the driving air source reaches the driving piston instantly and synchronously through the second small cylindrical blind hole and the third small cylindrical blind hole on the driving piston cylinder. The driving piston pushes the spool of the multi-way synchronous valve to instantly and synchronously complete the working position switching. At this time, the upper and lower channels of the multi-way synchronous valve body are all disconnected, all channels in the upper half of the multi-way synchronous valve body are connected, and all channels in the lower half of the multi-way synchronous valve body are connected.

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