A pneumatically actuated reversing valve

Abstract

The present invention discloses a pneumatically driven reversing valve, which relates to the technical field of reversing valves and includes an upper housing, an intermediate housing, a lower housing, an upper pressing block, a first elastic member, a second elastic member, a flow channel plate, a lower pressing block and a diaphragm. The flow channel plate includes a central cylinder and a disc fixedly sleeved outside the central cylinder. A plurality of output port groups are uniformly arranged along the circumferential direction on the side wall of the disc. Each output port group includes an adjacent first output port and a second output port. A first cylinder is arranged at the lower part of the middle plate of the upper pressing block. A plurality of arc-shaped plates are arranged along the circumferential direction at the bottom of the first cylinder. The arc-shaped plates are used to block the first output port or the second output port in each output port group. Each time the upper pressing block rotates, it can change the opening and closing states of the first output port and the second output port in at least two output port groups. This pneumatically driven reversing valve reduces the number of gas pipeline, reduces the failure rate and the difficulty of troubleshooting, and can realize the logic control of multiple gas circuits.

Description

Technical Field

[0001] The present invention relates to the technical field of reversing valves, and particularly to a reversing valve driven by air pressure. Background Art

[0002] Most of the existing pneumatic pumps on the market are single-channel input and single-channel output. One pneumatic pump requires a corresponding section of gas circuit for control. The more functions the entire system has, the more complex the structure is, and the more pneumatic pumps are required. As a result, more gas circuits are needed, which will cause the gas circuit pipes to be entangled with each other, leading to failures. At the same time, the existing pneumatic pumps are difficult to perform the functions of a logic controller. Summary of the Invention

[0003] To solve the above technical problems, the present invention provides a reversing valve driven by air pressure, which reduces the number of gas circuit pipes, reduces the failure rate and the difficulty of troubleshooting, and can realize the logical control of multiple gas circuits.

[0004] To achieve the above object, the present invention provides the following solution:

[0005] The present invention provides a pneumatically driven reversing valve, which comprises an upper housing, an intermediate housing, a lower housing, an upper pressing block, a first elastic member, a second elastic member, a flow channel plate, a lower pressing block and a diaphragm. The lower end of the upper housing, the flow channel plate and the upper end of the intermediate housing are sequentially connected from top to bottom. The lower end of the intermediate housing, the diaphragm and the upper end of the lower housing are sequentially connected from top to bottom. A gas input hole is provided on the side wall of the lower housing. The flow channel plate includes a central cylinder and a disk fixedly sleeved outside the central cylinder. A plurality of vertical guiding ribs are uniformly arranged along the circumferential direction on the inner wall of the central cylinder. A guiding groove is formed between any two adjacent guiding ribs. A gas channel is provided in the disk. An input port is provided on the side wall of the disk. A plurality of output port groups are uniformly arranged along the circumferential direction on the side wall of the disk. Each output port group includes a first output port and a second output port arranged adjacent to each other. The input port, the first output port and the second output port are all communicated with the gas channel. A first circular groove is provided at the upper part of the disk. The upper pressing block includes a first cylindrical rod, an intermediate plate and a second cylindrical rod which are sequentially connected from top to bottom. A first cylinder is provided at the lower part of the intermediate plate. A plurality of arc-shaped plates are arranged along the circumferential direction at the bottom of the first cylinder. A plurality of arc-shaped plates are all located in the first circular groove. The arc-shaped plates are used to block the first output port or the second output port in each output port group. Each time the upper pressing block rotates, it can change the opening and closing states of the first output port and the second output port in at least two output port groups. A plurality of vertical upper tooth columns are uniformly arranged along the circumferential direction on the outer wall of the second cylindrical rod. The second cylindrical rod is located in the central cylinder. Each upper tooth column can be inserted into any one of the guiding grooves. The first elastic member is sleeved on the first cylindrical rod. The top end of the first cylindrical rod can pass through the top surface of the upper housing and extend to the outside. The lower pressing block includes a bottom plate and a third cylindrical rod provided on the upper part of the bottom plate. The bottom plate is connected to the diaphragm and is located above the diaphragm. A plurality of vertical lower tooth columns are uniformly arranged along the circumferential direction on the outer wall of the third cylindrical rod. The second elastic member is sleeved outside a plurality of the lower tooth columns. The third cylindrical rod is located in the central cylinder. Each lower tooth column can be inserted into any one of the guiding grooves. The lower end of the upper tooth column has a first inclined tooth. The upper end of the lower tooth column has a second inclined tooth. The upper end of the guiding rib has a third inclined tooth. The second inclined tooth and the third inclined tooth are both matched with the first inclined tooth in structure.

[0006] Preferably, an input hose, a plurality of first output hoses and a plurality of second output hoses are further included. The gas passage includes an annular passage, an input passage, a plurality of first output passages and a plurality of second output passages. The annular passage is arranged in the middle of the disc body. The input port is communicated with the annular passage through the input passage. Each first output port is communicated with the annular passage through a first output passage. Each second output port is communicated with the outside through a second output passage. A second circular groove is arranged at the lower part of the disc body. The inner diameter of the first circular groove is larger than the outer diameter of the second circular groove. The input hose extends into the annular passage through the input port and the input passage. Each first output hose extends into the annular passage through a first output port and a first output passage. Each second output hose extends to one end of a second output passage close to the center of the disc body through a second output port. Vent holes are arranged on the pipe walls of each first output hose, and the vent holes correspond to the positions of the second circular groove.

[0007] Preferably, the disc body is in a disc shape. The input passage and the first output passages extend along the radial direction of the disc body. The second output passage includes a horizontal passage and a vertical passage. Two ends of each horizontal passage are respectively communicated with the second output port and the lower part of the vertical passage. The upper end of the vertical passage penetrates through the upper surface of the disc body. The horizontal passage is parallel to the first output passage. The second output hose is arranged in the horizontal passage.

[0008] Preferably, a top plate and a flange bearing are further included. The inner ring of the flange bearing is fixedly sleeved on the first cylindrical rod. The top plate is fixedly sleeved on the outer ring of the flange bearing. A first annular accommodating groove for accommodating the lower end of the first elastic member is arranged at the upper part of the top plate.

[0009] Preferably, a guiding cylinder and a limiting ring are arranged at the lower part of the top surface of the upper housing. The top end of the first cylindrical rod can penetrate through the guiding cylinder and the top surface of the upper housing to extend to the outside. The limiting ring is sleeved on the outside of the guiding cylinder. A second annular accommodating groove for accommodating the upper end of the first elastic member is formed between the limiting ring and the guiding cylinder.

[0010] Preferably, a pressure maintaining block is further included. The pressure maintaining block is sleeved on the outside of the lower end of the central cylinder and is located above the second elastic member.

[0011] Preferably, the pressure-holding block includes a second cylinder, a circular ring plate, and a third cylinder that are connected in sequence from top to bottom. The second cylinder is disposed at the outer edge of the circular ring plate, and the third cylinder is disposed at the inner edge of the circular ring plate. The third cylinder is slidably sleeved outside the lower end of the central cylinder, and the second cylinder can extend into the second circular ring groove.

[0012] Preferably, a support ring is provided on the upper part of the bottom plate. The lower end of the second elastic member is sleeved outside the support ring, and the upper end of the second elastic member is sleeved outside the third cylinder. A support column and a limit block are sequentially provided on the lower part of the bottom plate from top to bottom, and the diaphragm is sleeved outside the support column.

[0013] Preferably, it further includes a plurality of first bolts, a plurality of first nuts, a plurality of second bolts, and a plurality of second nuts. A plurality of first bumps are circumferentially provided on the outer wall of the lower end of the upper housing. A plurality of second bumps are circumferentially provided on the outer wall of the disk body. A plurality of third bumps are circumferentially provided on the outer wall of the upper end of the intermediate housing. Each first bolt sequentially passes through a first bump, a second bump, and a third bump and is installed with a first nut; a plurality of fourth bumps are circumferentially provided on the outer wall of the lower end of the intermediate housing. A plurality of fifth bumps are circumferentially provided on the outer wall of the upper end of the lower housing. Each second bolt sequentially passes through a fourth bump, the diaphragm, and a fifth bump and is installed with a second nut.

[0014] Preferably, the first elastic member is a first light spring, and the second elastic member is a second light spring; the upper housing, the intermediate housing, the lower housing, the upper pressure block, the flow channel disk, the lower pressure block, and the pressure-holding block are all made of ABS material.

[0015] The present invention has achieved the following technical effects compared with the prior art:

[0016] The pneumatically driven reversing valve of the present invention includes an upper housing, an intermediate housing, a lower housing, an upper pressure block, a first elastic member, a second elastic member, a flow channel disk, a lower pressure block, and a diaphragm. An input port is provided on the side wall of the disk body. A plurality of output port groups are evenly arranged circumferentially on the side wall of the disk body. Each output port group includes an adjacent first output port and a second output port. The input port is used to connect to a gas source, and the first output port and the second output port are used to connect to a pneumatic pump. The pneumatically driven reversing valve in the present invention is used as a diverter to distribute the gas from one gas source to multiple pneumatic pumps, greatly reducing the number of gas pipeline, reducing the failure rate and the difficulty of troubleshooting. At the same time, in the present invention, the opening and closing of the first output port and the second output port in each output port group can be adjusted by controlling the gas path input pulse, thereby realizing the logical control of multiple gas paths. Description of the Drawings

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 A cross-sectional view of the pneumatically driven reversing valve provided by the present invention;

[0019] Figure 2 The first exploded view of the pneumatically driven reversing valve provided by the present invention;

[0020] Figure 3 The second exploded view of the pneumatically driven reversing valve provided by the present invention;

[0021] Figure 4 The third exploded view of the pneumatically driven reversing valve provided by the present invention;

[0022] Figure 5 The three-dimensional structure diagram of the upper pressure block in the pneumatically driven reversing valve provided by the present invention;

[0023] Figure 6 The three-dimensional structure diagram of the lower pressure block in the pneumatically driven reversing valve provided by the present invention;

[0024] Figure 7 The three-dimensional structure diagram of the pressure maintaining block in the pneumatically driven reversing valve provided by the present invention;

[0025] Figure 8 The first three-dimensional structure diagram of the flow channel plate in the pneumatically driven reversing valve provided by the present invention;

[0026] Figure 9 The second three-dimensional structure diagram of the flow channel plate in the pneumatically driven reversing valve provided by the present invention;

[0027] Figure 10 A cross-sectional view of the flow channel plate in the pneumatically driven reversing valve provided by the present invention;

[0028] Figure 11 A cross-sectional view of the flow channel plate and the upper pressure block in the pneumatically driven reversing valve provided by the present invention.

[0029] Description of reference numerals: 100, pneumatically actuated reversing valve; 1, upper housing; 2, first elastic member; 3, top plate; 4, flange bearing; 5, upper pressing block; 51, first cylindrical rod; 52, intermediate plate; 53, second cylindrical rod; 54, first cylinder; 55, arc plate; 56, upper tooth column; 57, first inclined tooth; 6, flow channel plate; 61, central cylinder; 62, guiding rib; 63, plate body; 64, input port; 65, first output port; 66, second output port; 67, first annular groove; 68, second annular groove; 69, annular channel; 610, input channel; 611, first output channel; 612, horizontal channel; 613, vertical channel; 614, third inclined tooth; 7, pressure maintaining block; 71, second cylinder; 72, annular plate; 73, third cylinder; 8, intermediate housing; 9, lower pressing block; 91, bottom plate; 92, third cylindrical rod; 93, lower tooth column; 94, second inclined tooth; 95, supporting ring; 96, supporting column; 97, limiting block; 10, second elastic member; 11, diaphragm; 12, lower housing; 13, round hole; 14, guiding cylinder; 15, limiting ring; 16, gas input hole; 17, first convex block; 18, second convex block; 19, third convex block; 20, fourth convex block; 21, fifth convex block. Detailed implementation manners

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0031] The object of the present invention is to provide a pneumatically actuated reversing valve, which reduces the number of gas pipeline, reduces the failure rate and the difficulty of troubleshooting, and can realize the logic control of multiple gas circuits.

[0032] In order to make the above objects, features and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation manners.

[0033] As Figures 1-11As shown in the figure, this embodiment provides a pneumatically driven reversing valve 100, which includes an upper housing 1, an intermediate housing 8, a lower housing 12, an upper pressing block 5, a first elastic member 2, a second elastic member 10, a flow channel disk 6, a lower pressing block 9, and a diaphragm 11. The upper housing 1 has an open lower end structure, the intermediate housing 8 has open upper and lower ends structures, and the lower housing 12 has an open upper end structure. The lower end of the upper housing 1, the flow channel disk 6, and the upper end of the intermediate housing 8 are sequentially connected from top to bottom. The lower end of the intermediate housing 8, the diaphragm 11, and the upper end of the lower housing 12 are sequentially connected from top to bottom. A gas input hole 16 is provided on the side wall of the lower housing 12, and the gas input hole 16 is used to connect with an air pipe. An elastic air chamber is formed between the diaphragm 11 and the lower housing 12. During use, pulsed air pressure is input into the elastic air chamber through the air pipe and the gas input hole 16. The flow channel disk 6 includes a central cylinder 61 and a disk body 63 fixedly sleeved outside the central cylinder 61. The disk body 63 is arranged in the middle of the central cylinder 61 in the vertical direction, that is, both the upper and lower ends of the central cylinder 61 protrude relative to the upper and lower surfaces of the disk body 63. A plurality of vertical guide ribs 62 are evenly arranged along the circumferential direction on the inner wall of the central cylinder 61. A guide groove is formed between any two adjacent guide ribs 62. A gas channel is provided in the disk body 63. An input port 64 is provided on the side wall of the disk body 63. A plurality of output port groups are evenly arranged along the circumferential direction on the side wall of the disk body 63. Each output port group includes a first output port 65 and a second output port 66 arranged adjacent to each other. The input port 64, the first output port 65, and the second output port 66 are all communicated with the gas channel. A first circular groove 67 is provided on the upper part of the disk body 63.

[0034] As Figure 5As shown in the figure, the upper pressing block 5 includes a first cylindrical rod 51, an intermediate plate 52, and a second cylindrical rod 53 that are connected in sequence from top to bottom. A first cylinder 54 is provided at the lower part of the intermediate plate 52. A plurality of arc-shaped plates 55 are arranged circumferentially at the bottom of the first cylinder 54. There is a gap between any two adjacent arc-shaped plates 55. The plurality of arc-shaped plates 55 are all located in the first circular ring groove 67. The arc-shaped plates 55 are used to block the first outlet 65 or the second outlet 66 in each outlet group, so that one of the first outlet 65 and the second outlet 66 in each outlet group is in an open state and the other is in a closed state. Each rotation of the upper pressing block 5 can change the opening and closing states of the first outlet 65 and the second outlet 66 in at least two outlet groups. Before and after the upper pressing block 5 rotates, the arc-shaped plates 55 never block the inlet 64. A plurality of vertical upper tooth columns 56 are evenly arranged circumferentially on the outer wall of the second cylindrical rod 53. The second cylindrical rod 53 is located in the central cylinder 61. Each upper tooth column 56 can be inserted into any one of the guide grooves. The first elastic member 2 is sleeved on the first cylindrical rod 51. The top end of the first cylindrical rod 51 can pass through the top surface of the upper housing 1 and extend to the outside. A circular hole 13 for the first cylindrical rod 51 to pass through is provided on the top surface of the upper housing 1. The circular hole 13 can guide the first arc-shaped rod in the vertical direction. The first elastic member 2 is used to drive the upper pressing block 5 to reset after it is squeezed and lifted by the lower pressing block 9.

[0035] As Figure 6 shown in the figure, the lower pressing block 9 includes a bottom plate 91 and a third cylindrical rod 92 provided on the upper part of the bottom plate 91. The bottom plate 91 is connected to the diaphragm 11 and is located above the diaphragm 11. A plurality of vertical lower tooth columns 93 are evenly arranged circumferentially on the outer wall of the third cylindrical rod 92. The second elastic member 10 is sleeved on the outside of the plurality of lower tooth columns 93. The second elastic member 10 is used to drive the lower pressing block 9 to reset after it is driven to move upward by the bulged diaphragm 11. The third cylindrical rod 92 is located in the central cylinder 61. Each lower tooth column 93 can be inserted into any one of the guide grooves. The lower end of the upper tooth column 56 has a first inclined tooth 57. The bottom end of the first inclined tooth 57 extends below the bottom surface of the second cylindrical rod 53. The upper end of the lower tooth column 93 has a second inclined tooth 94. The top end of the second inclined tooth 94 extends above the top surface of the third cylindrical rod 92. The upper end of the guide rib 62 has a third inclined tooth 614. Both the second inclined tooth 94 and the third inclined tooth 614 are matched with the first inclined tooth 57 in structure. Specifically, the upper end of the second inclined tooth 94 has two symmetrically arranged inclined surfaces. One inclined surface of the second inclined tooth 94 can be attached to the inclined surface of the first inclined tooth 57. The inclined surface of the third inclined tooth 614 can be attached to the inclined surface of the first inclined tooth 57. In this embodiment, the inclined surfaces of the first inclined tooth 57, the second inclined tooth 94, and the third inclined tooth 614 are all spiral inclined surfaces.

[0036] Specifically, the number of guiding ribs 62, upper tooth columns 56, lower tooth columns 93 and output port groups is the same. In this embodiment, the number of guiding ribs 62, upper tooth columns 56, lower tooth columns 93 and output port groups is n. External gas enters the lower housing 12 through the gas input hole 16. Under the action of air pressure, the diaphragm 11 bulges upward, causing the lower pressing block 9 to move upward. The lower pressing block 9 drives the upper pressing block 5 to move upward, so that the upper tooth column 56 of the upper pressing block 5 is disengaged from one guiding groove and falls into another adjacent guiding groove under the action of the inclined surface of the third inclined tooth 614 on the guiding rib 62, causing the upper pressing block 5 to rotate 360° / n each time. The gas introduced into the gas input hole 16 is filled in a pulsed manner. Each time gas is introduced, the upper pressing block 5 rotates once. In this specific embodiment, the guiding ribs 62, upper tooth columns 56, lower tooth columns 93 and output port groups are all provided with four.

[0037] Such as Figures 8-11As shown, the present embodiment further includes an input hose, a plurality of first output hoses and a plurality of second output hoses. The gas passage includes an annular passage 69, an input passage 610, a plurality of first output passages 611 and a plurality of second output passages. An annular passage 69 is provided in the middle of the disk body 63. The input port 64 is communicated with the annular passage 69 through the input passage 610. Each first output port 65 is communicated with the annular passage 69 through a first output passage 611. Each second output port 66 is communicated with the outside through a second output passage. A second circular groove 68 is provided at the lower part of the disk body 63. The inner diameter of the first circular groove 67 is larger than the outer diameter of the second circular groove 68. The input hose extends into the annular passage 69 through the input port 64 and the input passage 610. The input hose will sequentially pass through the first circular groove 67 and the second circular groove 68 during the process of penetrating from the outside to the inside. Each first output hose extends into the annular passage 69 through a first output port 65 and a first output passage 611. Each first output hose will sequentially pass through the first circular groove 67 and the second circular groove 68 during the process of penetrating from the outside to the inside. Each second output hose extends to one end of a second output passage close to the center of the disk body 63 through a second output port 66. Each second output hose will sequentially pass through the first circular groove 67 and the second circular groove 68 during the process of penetrating from the outside to the inside. Vent holes are provided on the tube walls of each first output hose, and the vent holes correspond to the position of the second circular groove 68. Before and after the upper pressing block 5 rotates, the arc-shaped plate 55 will not press on the input hose, that is, before and after the upper pressing block 5 rotates, the arc-shaped plate 55 will not block the input port 64. The arc-shaped plate 55 realizes the blocking of the first output port 65 or the second output port 66 in each output port group by pressing on the first output hose or the second output hose. The gas of the first output port 65 comes from the gas that enters the annular passage 69 through the input hose and is output through the first output hose. The gas of the second output port 66 comes from the gas that enters the annular passage 69 through the input hose and then enters the first output hose, and is discharged from the vent hole in the first output hose. The gas discharged to the outside through the vent hole is then output through the second output hose.

[0038] As Figure 10As shown, the disk body 63 is disk-shaped. The input channel 610 and the first output channel 611 are both arranged to extend along the radial direction of the disk body 63. The second output channel includes a horizontal channel 612 and a vertical channel 613. Both ends of each horizontal channel 612 are respectively communicated with the second output port 66 and the lower part of the vertical channel 613. The upper end of the vertical channel 613 penetrates through the upper surface of the disk body 63. The horizontal channel 612 is parallel to the first output channel 611. The second output hose is arranged in the horizontal channel 612. The gas discharged to the outside through the vent holes on the first output hose enters the second output hose located in the horizontal channel 612 through the vertical channel 613, and then can be discharged from the second output port 66. In this embodiment, the annular channel 69 is a circular annular channel, and the inner diameter of the second circular ring groove 68 is larger than the outer diameter of the annular channel 69.

[0039] This embodiment further includes a top plate 3 and a flange bearing 4. The inner ring of the flange bearing 4 is fixedly sleeved on the first cylindrical rod 51, and the top plate 3 is fixedly sleeved on the outer ring of the flange bearing 4. A first annular accommodating groove for accommodating the lower end of the first elastic member 2 is arranged on the upper part of the top plate 3.

[0040] A guiding cylinder 14 and a limiting ring 15 are arranged below the top surface of the upper shell 1. The guiding cylinder 14 corresponds to the position of the circular hole 13 on the top surface of the upper shell 1. The top end of the first cylindrical rod 51 can pass through the guiding cylinder 14 and the circular hole 13 of the upper shell 1 and extend to the outside. By providing the guiding cylinder 14, the guiding effect of the first cylindrical rod 51 in the vertical direction is improved. The limiting ring 15 is sleeved outside the guiding cylinder 14. A second annular accommodating groove for accommodating the upper end of the first elastic member 2 is formed between the limiting ring 15 and the guiding cylinder 14. The first elastic member 2 is stably installed by the cooperation of the second annular accommodating groove and the first annular accommodating groove.

[0041] This embodiment further includes a pressure maintaining block 7. The pressure maintaining block 7 is sleeved outside the lower end of the central cylinder 61 and is located above the second elastic member 10. As Figure 7 shown, the pressure maintaining block 7 includes a second cylinder 71, a circular ring plate 72 and a third cylinder 73 which are connected in sequence from top to bottom. The second cylinder 71 is arranged at the outer edge of the circular ring plate 72, and the third cylinder 73 is arranged at the inner edge of the circular ring plate 72. The third cylinder 73 is slidably sleeved outside the lower end of the central cylinder 61. By sleeving on the central cylinder 61, the movement of the pressure maintaining block 7 in the vertical direction is guided. The second cylinder 71 can extend into the second circular ring groove 68. In the initial state, the second cylinder 71 extends into the lower part of the second circular ring groove 68, that is, the second cylinder 71 does not squeeze the input hose, the first output hose and the second output hose passing through the second circular ring groove 68.

[0042] On the upper part of the bottom plate 91, a supporting ring 95 is provided. The lower end of the second elastic member 10 is sleeved outside the supporting ring 95, and the upper end of the second elastic member 10 is sleeved outside the third cylinder 73, so that the second elastic member 10 is stably installed. On the lower part of the bottom plate 91, a support column 96 and a limit block 97 are sequentially arranged from top to bottom. The diaphragm 11 is sleeved outside the support column 96, and the limit block 97 is used to prevent the diaphragm 11 from slipping off the support column 96.

[0043] In this embodiment, it also includes a plurality of first bolts, a plurality of first nuts, a plurality of second bolts and a plurality of second nuts. A plurality of first bumps 17 are arranged along the circumferential direction on the outer wall of the lower end of the upper housing 1. A plurality of second bumps 18 are arranged along the circumferential direction on the outer wall of the disc body 63. A plurality of third bumps 19 are arranged along the circumferential direction on the outer wall of the upper end of the middle housing 8. Each first bolt sequentially passes through a first bump 17, a second bump 18 and a third bump 19 and is installed with a first nut, so as to realize the fixation of the upper housing 1, the disc body 63 and the middle housing 8; A plurality of fourth bumps 20 are arranged along the circumferential direction on the outer wall of the lower end of the middle housing 8. A plurality of fifth bumps 21 are arranged along the circumferential direction on the outer wall of the upper end of the lower housing 12. Each second bolt sequentially passes through a fourth bump 20, the diaphragm 11 and a fifth bump 21 and is installed with a second nut, so as to realize the fixation of the middle housing 8, the diaphragm 11 and the lower housing 12.

[0044] In this specific embodiment, the diaphragm 11 is a silica gel diaphragm, the first elastic member 2 is a first light spring, and the second elastic member 10 is a second light spring; The upper housing 1, the middle housing 8, the lower housing 12, the upper pressing block 5, the flow channel disc 6, the lower pressing block 9 and the pressure maintaining block 7 are all made of ABS material and are manufactured by 3D printing technology, which shortens the manufacturing cycle, greatly reduces the weight and cost, and can be mass-produced.

[0045] The specific use process is as follows: When external gas enters the elastic air cavity formed between the lower housing 12 and the diaphragm 11 through the air pipe and the gas input hole 16 on the lower housing 12, the elastic air cavity elastically expands, the diaphragm 11 bulges upward, and squeezes the lower pressing block 9 to move upward. Under the pushing action of the lower tooth column 93 on the upper tooth column 56, the upper pressing block 5 is pushed by the lower pressing block 9 to move upward. Since the upper pressing block 5 and the top plate 3 are subjected to the thrust of the first elastic member 2, when the first inclined tooth 57 at the lower end of the upper tooth column 56 in the upper pressing block 5 moves above the inclined surface of the third inclined tooth 614 at the upper end of the guiding rib 62 in the central cylinder 61, the first inclined tooth 57 at the lower end of the upper tooth column 56 will slide along the inclined surface of the third inclined tooth 614, so that each upper tooth column 56 disengages from one guiding groove and falls into another adjacent guiding groove. In this way, under the action of the inclined surface, the upper pressing block 5 will rotate 90°, and at the same time drive the plurality of arc-shaped plates 55 on the upper pressing block 5 to rotate 90°. Specifically, Figure 11The initial state will be described. Output port groups are provided on the upper, lower, left, and right sides of the flow channel plate 6. The input port 64 is located in the upper left of the flow channel plate 6. When the upper pressing block 5 is in the Figure 11 state shown in Figure 11 , the first output port 65 on the lower side of the flow channel plate 6 is in the open state, and the second output port 66 is in the closed state; the first output ports 65 on the left, right, and upper sides of the flow channel plate 6 are in the closed state, and the second output ports 66 are in the open state. When the upper pressing block 5 rotates clockwise by 90°, the first output port 65 on the left side of the flow channel plate 6 is in the open state, and the second output port 66 is in the closed state; the first output ports 65 on the right, upper, and lower sides of the flow channel plate 6 are in the closed state, and the second output ports 66 are in the open state. It can be seen that after this rotation, the opening and closing states of the first output port 65 and the second output port 66 in the output port groups on the lower and left sides of the flow channel plate 6 are switched. That is, in this embodiment, every time the upper pressing block 5 rotates once, the opening and closing states of the first output port 65 and the second output port 66 in the two output port groups are switched.

[0046] In this embodiment, the input port 64 on the side wall of the disk body 63 is used to connect to the air source, and the first output port 65 and the second output port 66 are used to connect to the pneumatic pump. The pneumatically driven reversing valve 100 in this embodiment is used as a diverter to distribute the gas from one air source to multiple pneumatic pumps, greatly reducing the number of air pipeline, reducing the failure rate and the difficulty of troubleshooting. At the same time, in this embodiment, the opening and closing of the first output port 65 and the second output port 66 in each output port group can be adjusted by controlling the air path input pulse, thereby realizing the logical control of multiple air paths. In this embodiment, the volume of the pneumatic rotation module is reduced, which can adapt to the application scenarios of small spaces, improving flexibility. And the pneumatically driven reversing valve 100 in this embodiment does not contain electronic devices and can be used under harsh conditions such as strong magnetic fields and explosion-proof requirements.

[0047] In this specification, specific examples are used to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A pneumatically actuated directional control valve, characterized in that, It includes an upper housing, an intermediate housing, a lower housing, an upper pressing block, a first elastic member, a second elastic member, a runner plate, a lower pressing block and a diaphragm. The lower end of the upper housing, the runner plate and the upper end of the intermediate housing are connected in sequence from top to bottom. The lower end of the intermediate housing, the diaphragm and the upper end of the lower housing are connected in sequence from top to bottom. A gas input hole is provided on the side wall of the lower housing. The runner plate includes a central cylinder and a disk body fixedly sleeved outside the central cylinder. A plurality of vertical guide ribs are uniformly arranged along the circumferential direction on the inner wall of the central cylinder. A guide groove is formed between any two adjacent guide ribs. A gas channel is provided in the disk body. An input port is provided on the side wall of the disk body. A plurality of output port groups are uniformly arranged along the circumferential direction on the side wall of the disk body. Each output port group includes a first output port and a second output port arranged adjacent to each other. The input port, the first output port and the second output port are all communicated with the gas channel. A first circular groove is provided on the upper part of the disk body. The upper pressing block includes a first cylindrical rod, an intermediate plate and a second cylindrical rod connected in sequence from top to bottom. A first cylinder is provided on the lower part of the intermediate plate. A plurality of arc-shaped plates are arranged along the circumferential direction at the bottom of the first cylinder. A plurality of arc-shaped plates are all located in the first circular groove. The arc-shaped plates are used to block the first output port or the second output port in each output port group. Each time the upper pressing block rotates, it can change the opening and closing states of the first output port and the second output port in at least two output port groups. A plurality of vertical upper tooth columns are uniformly arranged along the circumferential direction on the outer wall of the second cylindrical rod. The second cylindrical rod is located in the central cylinder. Each upper tooth column can be inserted into any one of the guide grooves. The first elastic member is sleeved on the first cylindrical rod. The top end of the first cylindrical rod can pass through the top surface of the upper housing and extend to the outside. The lower pressing block includes a bottom plate and a third cylindrical rod provided on the upper part of the bottom plate. The bottom plate is connected to the diaphragm and is located above the diaphragm. A plurality of vertical lower tooth columns are uniformly arranged along the circumferential direction on the outer wall of the third cylindrical rod. The second elastic member is sleeved outside a plurality of the lower tooth columns. The third cylindrical rod is located in the central cylinder. Each lower tooth column can be inserted into any one of the guide grooves. The lower end of the upper tooth column has a first inclined tooth. The upper end of the lower tooth column has a second inclined tooth. The upper end of the guide rib has a third inclined tooth. The second inclined tooth and the third inclined tooth are both matched with the first inclined tooth in structure.

2. The pneumatically actuated reversing valve according to claim 1, characterized in that, It further includes an input hose, a plurality of first output hoses and a plurality of second output hoses. The gas channel includes an annular channel, an input channel, a plurality of first output channels and a plurality of second output channels. The annular channel is provided in the middle of the disk body. The input port is communicated with the annular channel through the input channel. Each first output port is communicated with the annular channel through a first output channel. Each second output port is communicated with the outside through a second output channel. A second circular groove is provided at the lower part of the disk body. The inner diameter of the first circular groove is greater than the outer diameter of the second circular groove. The input hose extends into the annular channel through the input port and the input channel. Each first output hose extends into the annular channel through a first output port and a first output channel. Each second output hose extends to one end of a second output channel close to the center of the disk body through a second output port. Vent holes are provided on the tube walls of each first output hose, and the vent holes correspond to the positions of the second circular groove.

3. The pneumatically actuated directional control valve according to claim 2, characterized in that, The disk body is in a disk shape. The input channel and the first output channels are arranged to extend along the radial direction of the disk body. The second output channel includes a horizontal channel and a vertical channel. The two ends of each horizontal channel are respectively communicated with the second output port and the lower part of the vertical channel. The upper end of the vertical channel penetrates through the upper surface of the disk body. The horizontal channel is parallel to the first output channels. The second output hose is arranged in the horizontal channel.

4. The pneumatically actuated reversing valve according to claim 1, characterized in that, It further includes a top plate and a flange bearing. The inner ring of the flange bearing is fixedly sleeved on the first cylindrical rod. The top plate is fixedly sleeved on the outer ring of the flange bearing. A first annular accommodating groove for accommodating the lower end of the first elastic member is provided at the upper part of the top plate.

5. The pneumatically actuated reversing valve according to claim 1, characterized in that, A guiding cylinder and a limiting ring are provided at the lower part of the top surface of the upper housing. The top end of the first cylindrical rod can pass through the guiding cylinder and the top surface of the upper housing and extend to the outside. The limiting ring is sleeved on the outside of the guiding cylinder. A second annular accommodating groove for accommodating the upper end of the first elastic member is formed between the limiting ring and the guiding cylinder.

6. The pneumatically actuated directional control valve according to claim 2, characterized in that, It further includes a pressure maintaining block. The pressure maintaining block is sleeved on the outside of the lower end of the central cylinder and is located above the second elastic member.

7. The pneumatically actuated reversing valve according to claim 6, characterized in that, The pressure maintaining block includes a second cylinder, a circular ring plate and a third cylinder which are connected in sequence from top to bottom. The second cylinder is arranged at the outer edge of the circular ring plate. The third cylinder is arranged at the inner edge of the circular ring plate. The third cylinder is slidably sleeved on the outside of the lower end of the central cylinder. The second cylinder can extend into the second circular groove.

8. The pneumatically actuated directional control valve according to claim 7, characterized in that, A supporting ring is provided at the upper part of the bottom plate. The lower end of the second elastic member is sleeved on the outside of the supporting ring. The upper end of the second elastic member is sleeved on the outside of the third cylinder. A supporting column and a limiting block are arranged at the lower part of the bottom plate in sequence from top to bottom. The diaphragm is sleeved on the outside of the supporting column.

9. The pneumatically actuated directional control valve according to claim 1, characterized in that, It further includes a plurality of first bolts, a plurality of first nuts, a plurality of second bolts and a plurality of second nuts. A plurality of first bumps are circumferentially arranged on the outer wall of the lower end of the upper housing. A plurality of second bumps are circumferentially arranged on the outer wall of the disc body. A plurality of third bumps are circumferentially arranged on the outer wall of the upper end of the intermediate housing. Each of the first bolts sequentially passes through one of the first bumps, one of the second bumps and one of the third bumps and is installed with one of the first nuts; A plurality of fourth bumps are circumferentially arranged on the outer wall of the lower end of the intermediate housing. A plurality of fifth bumps are circumferentially arranged on the outer wall of the upper end of the lower housing. Each of the second bolts sequentially passes through one of the fourth bumps, the diaphragm and one of the fifth bumps and is installed with one of the second nuts.

10. The pneumatically actuated reversing valve according to claim 6, characterized in that, The first elastic member is a first light spring, and the second elastic member is a second light spring; The upper housing, the intermediate housing, the lower housing, the upper pressing block, the flow channel disc, the lower pressing block and the pressure maintaining block are all made of ABS material.

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