Integral multi-way synchronous switching valve and switching method

Abstract

The invention discloses an integral type multi-way synchronous switching valve and a switching method. The integral type multi-way synchronous switching valve comprises a multi-way synchronous valve body, a multi-way synchronous valve element, a driving piston cylinder, a driving piston and a driving air source. A plurality of sets of large cylindrical through holes with the same diameter are symmetrically distributed in the length direction and the width direction of the multi-way synchronous valve body. A plurality of large cylindrical blind holes are symmetrically formed in the driving piston cylinder along the center line in the length direction; two small cylindrical through holes are formed in the center line of the driving piston cylinder in the width direction and correspond to the two small cylindrical through holes of the multi-way synchronous valve body in position, and a gas channel is formed. The driving piston is pushed by driving pressure provided by the driving air source to move in the large cylindrical blind hole of the driving piston cylinder, the multi-way synchronous valve element is pushed to move in the multi-way synchronous valve body, and switching of two working positions of the multi-way synchronous switching valve is achieved. The multi-channel synchronous switching function can be realized, the size is small, and the execution reliability is high.

Description

Technical Field

[0001] The 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 16-channel independent measurement, 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 gases 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 structures. If the method of disassembling the pipeline is used to zero 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, as a measuring instrument, the pressure scanning valve 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 path 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 achieved.

[0004] In summary, the pressure scanning valve needs to realize the 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 valve widely used in the market is realized by an integrated valve, that is, a reversing valve, an oil inlet check valve, a safety valve, an overload valve, an oil replenishing valve, etc. are integrated. The multi-way reversing valve is formed by combining these reversing valves in parallel, series, or series-parallel. The control method can be manual or solenoid valve control, hydraulic control, electro-hydraulic control, proportional solenoid control, computer control, etc., but 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, have 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, including a multi-way synchronous valve body, a multi-way synchronous valve core, 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 groups of large cylindrical through holes with the same diameter, which are symmetrically distributed along the length and width directions, and are the movement tracks of the multi-way synchronous valve spool. The multi-way synchronous valve spool matches the number of large cylindrical through holes of the multi-way synchronous valve body;

[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 vertically;

[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 are the tracks for the driving piston to move, and 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 through a third small cylindrical blind hole in a perpendicular direction 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 types of grooves with unequal spacing, 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, 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.

[0016] Preferably, threaded holes are symmetrically provided on the two end surfaces 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 surface 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 an axial O-ring is provided on the step hole.

[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, adjust the driving air source pressure to the driving pressure value, and 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 multi-way synchronous valve core to instantly and synchronously complete the working position switching. At this time, the multi-way synchronous valve body forms multiple independent channels for the upper and lower passages;

[0021] Connect the driving air source and the right driving piston cylinder, turn on the driving air source, adjust the driving air source pressure to the driving pressure value, and 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 valve core 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, and the multi-way synchronous valve has a small size and high execution reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solution 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. For those skilled in the art, other drawings can be obtained based on these drawings without creative work:

[0024] Figure 1 is a structural schematic 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-driving piston cylinder, 6-driving piston, 7-axial O-type sealing ring, 8-radial O-type sealing ring, 9-first screw, 10-second screw, 11-driving air source. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are 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 integrated multi-way synchronous switching valve of the embodiment of the present invention includes a multi-way synchronous valve body 1, a multi-way synchronous valve core, a side cover plate 4, a drive piston cylinder 5, a drive piston 6, an axial O-ring 7, a radial O-ring 8, a first screw 9, a second screw 10, and a drive air source 11.

[0029] The multi-way synchronous valve body 1 is provided with a plurality of groups of large cylindrical through holes 12 with the same diameter, which are symmetrically distributed along the length and width directions, and are the movement tracks 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 vertically 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 measuring working state, and the first small cylindrical through hole 14 and the second small cylindrical through hole 15 form a calibration (purge) working state, and 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 step holes in the outward direction, and an axial O-type sealing ring 7 is arranged on the step hole to realize the axial sealing between the multi-way synchronous valve body 1 and its connecting piece. The multi-way synchronous valve body 1 is symmetrically provided with threaded holes at both end faces, and the center of the two side faces of the multi-way synchronous valve body 1 is provided with threaded holes.

[0030] The number of large cylindrical through holes 12 of the multi-way synchronous valve core matches that of the multi-way synchronous valve body 1. The multi-way synchronous valve core includes a first multi-way synchronous valve core 2 and a second multi-way synchronous valve core 3. The first multi-way synchronous valve core 2 is provided with evenly distributed grooves, and the second multi-way synchronous valve core 3 is provided with three grooves of unequal spacing. The different settings of the grooves enable the valve core to cooperate with the valve body at different positions, and can achieve single-channel connection in the measurement state and multi-channel connection in the calibration (purge) state. A radial O-ring 8 is provided on the groove to achieve radial sealing between the multi-way synchronous valve core and the multi-way synchronous valve body 1, and a chamfer is provided on the sharp edge of the multi-way synchronous valve core. A step hole is provided at the center of the side cover plate 4, and a first screw 9 is installed on the step hole. The first screw 9 connects the side cover plate 4 to the multi-way synchronous valve body 1 through the step hole on the side cover plate 4 and the threaded hole on the side of the multi-way synchronous valve body 1.

[0031] The driving piston cylinder 5 is symmetrically provided with a plurality of large cylindrical blind holes 16 along the center line of the length direction, and a second small cylindrical blind hole 17 concentric with the large cylindrical blind hole 16 is provided at the bottom of the large cylindrical blind hole 16, and all the second small cylindrical blind holes 17 are connected through a third small cylindrical blind hole 18 perpendicular to the large cylindrical blind hole 16, and the large cylindrical blind hole 16 is the track for the driving piston 6 to move. The second small cylindrical blind hole 17 and the third small cylindrical blind hole 18 are the gas path for the driving gas source to push the driving piston. There are two third small cylindrical through holes 19 at the center line of the driving piston cylinder 5 along the width direction, which correspond to the positions of the two second small cylindrical through holes 15 of the multi-way synchronous valve body 1 to form a gas passage; the left and right sides of the large cylindrical blind hole 16 are provided with step holes, and the step holes are provided with second screws, and the second screws connect the driving piston cylinder 5 with the multi-way synchronous valve body 1 through the step holes on the driving piston cylinder 5 and the threaded holes on the end surface of the multi-way synchronous valve body 1. The driving piston 6 moves in the large cylindrical blind hole 16 of the driving piston cylinder 5 under the driving pressure provided by the driving gas source 11, pushing the first multi-way synchronous valve spool 2 and the second multi-way synchronous valve spool 3 to move in the multi-way synchronous valve body 1, realizing the switching of the two working positions of the multi-way synchronous switching valve. A groove is provided on the outer circumference of the driving piston 6, and a radial O-ring 8 is provided on the groove to realize the sealing between the driving piston 6 and the driving piston cylinder 5. The driving gas 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 and 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, and 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 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. 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 summarize, according to the integrated multi-way synchronous switching valve of the embodiment of the present invention, the multi-way synchronous valve body and the multi-way synchronous valve core form a multi-way synchronous two-position multi-ventilation air 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 integrated valve body and the ingenious cooperation of the valve and core combination, the switching of two functions is realized. Function one is multi-way independent connection, that is, the upper air port of the integrated 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 integrated 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 integrated 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 can realize multiple synchronous independent channels through precise air path mechanical structure design, and can also realize bidirectional multiple 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 realized by driving the valve core through the driving gas 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 that needs to overcome the large friction force to push the valve body;

[0039] 3. The present invention realizes multi-channel 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 only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

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 groups of large cylindrical through holes with the same diameter, which are symmetrically distributed along the length and width directions, and are the movement tracks of the multi-way synchronous valve spool. The multi-way synchronous valve spool matches the number of large cylindrical through holes of the multi-way synchronous valve body; 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 vertically; 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 are the tracks for the driving piston to move, and 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 through a third small cylindrical blind hole in a perpendicular direction 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, the second multi-way synchronous valve core is provided with three types of 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 arranged at the two end surfaces of the multi-way synchronous valve body, and step holes are arranged on the left and right sides of the large cylindrical blind hole. A second screw is arranged 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 surface 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 an axial O-type sealing ring is provided on the step hole.

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, adjust the driving air source pressure to the driving pressure value, and 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 multi-way synchronous valve core to instantly and synchronously complete the working position switching. At this time, the multi-way synchronous valve body forms multiple independent channels for the upper and lower passages; Connect the driving air source and the right driving piston cylinder, turn on the driving air source, adjust the driving air source pressure to the driving pressure value, and 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 valve core 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.

Images