Reversing assembly for controlling air inlet flow and air bag pump

Abstract

The utility model belongs to the field of air bag pumps, and particularly relates to a reversing assembly for controlling air inlet flow and an air bag pump. The reversing assembly comprises an end piece, a flow control piece and a reversing piece. The flow control piece comprises a mounting cavity formed in the side face of the air inlet pipe of the end piece, a cock with a spiral groove formed in the side face, a threaded rod located in the mounting cavity and an adjusting rod penetrating through the end piece and extending into the mounting cavity, a limiting pin with one end extending into the spiral groove is arranged on the side wall of the mounting cavity, and one end of the threaded rod is in threaded sleeve connection with the cock; the other end of the threaded rod is rotationally connected with the inner wall of the mounting cavity, and the adjusting rod is used for driving the threaded rod to rotate so as to drive the plug cock to rotate spirally. The reversing assembly is provided with a flow control piece which can control gas inlet and outlet and can control the gas inlet flow at the same time, in-situ gas flow regulation and control of the air bag pump are achieved, and the output flow of the air bag pump is convenient to adjust.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of wind bag pump, concretely relates to a reversing assembly of controlling air intake flow and wind bag pump. BACKGROUND

[0002] The information disclosed in this Background section is for the purpose of providing context for the utility model only, and is not necessarily recognized as prior art by the patent office.

[0003] The wind bag pump is an indispensable pump body equipment in the semiconductor production industry chain, is a kind of non-metallic pump body for conveying high-purity acid and alkali, and can also be used to convey other high-purity fluids.The wind bag pump is powered by compressed air, and the internal bag reciprocates to drive the liquid to be conveyed.The pump cavity of the wind bag is divided into two working chambers, each working chamber is divided into two parts, i.e., a gas phase working chamber and a liquid phase working chamber, compressed air enters the gas phase working chamber of the pump, the compressed wind bag deforms and moves, and the compressed air is controlled to enter the two gas phase working chambers in turn by the reversing valve, and the liquid is pumped by the alternating liquid suction and discharge of the liquid phase chamber to realize the conveying of the liquid.

[0004] The output flow of the wind bag pump can be adjusted by changing the gas source pressure of compressed air or by changing the valve opening of the output pipeline.Therefore, the existing wind bag pump adjustment has the following situations: adjusting the gas source pressure while keeping the output pipeline valve opening unchanged, adjusting the output pipeline valve opening while keeping the gas source pressure unchanged, or adjusting the gas source pressure and the output pipeline valve opening simultaneously.Whichever adjustment method is used, a corresponding adjusting valve needs to be arranged on the connecting pipeline outside the wind bag pump, which not only increases the equipment investment, but also makes the operation inconvenient due to the long distance between the adjusting valve installation position and the wind bag pump, and increases the running resistance of the wind bag pump.

[0005] The wind bag pump with the wind bag inside as the gas working chamber is often provided with a reversing assembly connected with the wind bag, and the reversing assembly can cyclically switch the gas in and out to realize the switching of the wind bag movement direction.The reversing assembly is the passage for the compressed air to enter and exit the wind bag pump, but the reversing assembly in the prior art cannot control the gas flow, and still needs to rely on the external valve to realize the adjustment of the gas intake flow and the output flow. UTILITY MODEL CONTENTS

[0006] In order to solve the problem that the reversing assembly of the wind bag pump in the prior art cannot control the gas flow, the utility model aims to provide a reversing assembly of controlling air intake flow and wind bag pump, the reversing assembly is provided with a flow control member, which can control the gas in and out while controlling the gas intake flow, realizes the in-situ regulation of the wind bag pump to control the air intake flow, and is convenient for adjusting the output flow of the wind bag pump.

[0007] In order to achieve the above object, the utility model is through the following technical scheme to realize:

[0008] First, the utility model provides a kind of reversing assembly for controlling intake flow, for air bag pump, the reversing assembly includes end piece, flow control piece and reversing piece;

[0009] The end piece is equipped with intake pipe, reversing cavity and reversing pipe, the reversing cavity is communicated with the reversing pipe;

[0010] The flow control piece includes installation cavity being opened in the side surface of the intake pipe, side surface opening spiral groove's plug, the threaded rod being located in the inside of installation cavity and the adjusting rod being inserted into the installation cavity of end piece, the side wall of installation cavity is provided with one end and is inserted into the limiting pin of spiral groove, the one end of threaded rod is threadedly connected with the plug, the other end of threaded rod is rotatably connected with the inner wall of installation cavity, and the adjusting rod is used to drive the threaded rod rotation and further drive the plug spiral rotation;

[0011] The reversing piece includes cylinder body with one end open and connecting rod, the cylinder body is slidably connected with the reversing cavity, the outside of the closed end of the cylinder body is equipped with sealing element, and the part not covered by sealing element is equipped with through hole, the sealing element is oppositely arranged with the sealing end surface of the reversing pipe, one end of the connecting rod is inserted into the cylinder body, and the connecting rod is used to drive the cylinder body to slide.

[0012] Flow control piece realizes the adjustment to intake flow by changing the proportion of plug inserted into intake pipe, and the axial movement of plug is realized by threaded rod and limiting pin together. By adjusting rod driving threaded rod rotation, while the threaded rod fixed in axis direction rotates circumferentially, limiting pin is inserted into spiral groove to generate limiting effect and provide axial force, so that plug rotates spirally to realize axial displacement, and further realize the control to intake flow. Limiting pin can provide axial force when plug rotates spirally, and can limit the axial displacement degree and rotation number of plug, to prevent plug from being separated from threaded rod. Threaded rod is rotatably connected with installation cavity by connecting member existing in prior art such as bearing, and axial fixation and circumferential rotation of threaded rod are satisfied.

[0013] During the working process of air bag pump, reversing piece changes state switching with the expansion and contraction of air bag, changes the sealing state between sealing element and reversing pipe to realize reversing.

[0014] Optionally, the threaded rod is fixedly connected with meshing bevel gear, one end of the adjusting rod inserted into the installation cavity is fixedly connected with rotating bevel gear, and the meshing bevel gear and the rotating bevel gear are vertically engaged.

[0015] When adjusting rod rotates, rotating bevel gear rotates, and meshing bevel gear is driven to rotate by meshing effect, and further drive threaded rod to rotate.

[0016] Further optionally, an inner wall of the mounting cavity is provided with a fixing block with a fixing hole, the adjusting rod is slidably connected with the fixing block through the fixing hole, and the fixing block abuts against the rotating bevel gear.

[0017] The fixing block is used for fixing the adjusting rod and the rotating bevel gear, and preventing the adjusting rod from sliding to make the rotating bevel gear deviate from the working position.

[0018] Optionally, an axial length of the plug is greater than or equal to a diameter of the air inlet pipe, a length of the threaded rod is less than or equal to an axial length of the mounting cavity, and the axial length of the plug and the length of the threaded rod are greater than a sum of the diameter of the air inlet pipe and the axial length of the mounting cavity.

[0019] By limiting the size relationship of the plug, the threaded rod, the mounting cavity and the air inlet pipe, the closing ratio of the plug to the air inlet pipe can be improved, and the plug and the threaded rod can be prevented from being separated.

[0020] Optionally, an end of the adjusting rod extending out of the end piece is provided with a handle.

[0021] Optionally, an end of the connecting rod extending into the cylinder body is provided with an inner edge portion, an open end of the cylinder body is provided with an outer edge portion, and a gap for gas flow exists between the cylinder body and the connecting rod.

[0022] When the wind bag is stretched, the connecting rod moves away from the closed end of the cylinder body along with the wind bag, and when the inner edge portion contacts the outer edge portion, the connecting rod drives the cylinder body to move to make the sealing element separate from the sealing end surface of the reversing pipe, the gas in the wind bag is discharged through the reversing pipe, and the wind bag is reversed to the compression direction. When the wind bag is compressed, the connecting rod moves towards the closed end of the cylinder body along with the wind bag, and when the inner edge portion contacts the closed end, the connecting rod drives the cylinder body to move to make the sealing element contact the sealing end surface of the reversing pipe to form a seal. At this time, the air inlet pipe supplies air to the wind bag, and the wind bag is reversed to the stretching direction.

[0023] Optionally, an axial length of the connecting rod is greater than a sum of an axial length of an inner cavity of the cylinder body and a thickness of the open end wall.

[0024] The axial length of the connecting rod is limited to prevent the connecting rod from being too short to drive the cylinder body to move, so that the reversing element fails.

[0025] Optionally, the sealing element is a plate-shaped structure or a suction disc-shaped structure with an area greater than a cross-sectional area of the reversing pipe.

[0026] Optionally, the sealing element extends into the reversing pipe to seal the reversing pipe.

[0027] In a second aspect, the utility model provides a kind of wind bag pump, including the reversing assembly and wind bag as described in first aspect, the end piece is connected with the wind bag to be arranged in the opening end of the driving air bag of the wind bag, the air inlet pipe is communicated with the driving air bag, the connecting rod is connected with the wind bag in the one end of the cylinder body.

[0028] The above one or more technical solutions of the utility model have the following beneficial effects:

[0029] By setting flow control piece reversing assembly can control the flow of gas in and out at the same time, realizes that wind bag pump in situ regulates gas flow, it is convenient to adjust the output flow of wind bag pump, equipment cost is reduced.

[0030] Flow control piece sets up linkage stopcock, threaded rod, adjusting rod and limit pin, adjusting rod is rotated using threaded rod, stopcock is rotated and is made to screw rotation by the effect of limit pin and threaded rod, the opening of air inlet pipe is adjusted by axial displacement, realizes air inlet flow control.

[0031] The setting of flow control piece does not affect the original function of reversing assembly and wind bag pump, wherein each component cooperates and restricts each other, so that flow control piece can stably realize its function, and the stable regulation and control of gas flow is improved. BRIEF DESCRIPTION OF DRAWINGS

[0032] The drawings constituting part of the specification of the utility model are used to provide further understanding of the utility model, and the illustrative embodiment of the utility model and its explanation are used to explain the utility model, and do not constitute undue limitation on the utility model.

[0033] Figure 1 It is cross-sectional structure diagram of reversing assembly in example 1;

[0034] Figure 2 It is cross-sectional structure diagram of flow control piece in example 1, 2 and 3;

[0035] Figure 3 It is cross-sectional structure diagram of reversing assembly in example 2;

[0036] Figure 4 It is cross-sectional structure diagram of reversing assembly in example 3;

[0037] Figure 5 It is cross-sectional structure diagram of reversing assembly in example 4;

[0038] Figure 6 It is partial cross-sectional structure diagram of wind bag pump in example 5;

[0039] In the diagram, 100 is the reversing assembly, 110 is the end piece, 111 is the intake pipe, 112 is the reversing cavity, 113 is the reversing tube, 120 is the flow control component, 121 is the mounting cavity, 122 is the stopcock, 123 is the threaded rod, 124 is the adjusting rod, 125 is the limit pin, 126 is the meshing bevel gear, 127 is the rotating bevel gear, 128 is the fixing block, 129 is the throttle, 130 is the reversing component, 131 is the cylinder, 132 is the connecting rod, 133 is the seal, 134 is the through hole, 135 is the inner edge, 136 is the outer edge, 200 is the airbag, and 210 is the drive airbag. Detailed Implementation

[0040] To enable those skilled in the art to better understand the technical solution of this utility model, the technical solution of this utility model will be described in detail below with reference to specific embodiments and comparative examples.

[0041] Example 1

[0042] like Figure 1 As shown, the reversing assembly 100 for controlling the intake airflow includes an end piece 110, a flow control piece 120, and a reversing piece 130.

[0043] The end piece 110 is provided with an air inlet pipe 111, a reversing cavity 112 and a reversing pipe 113, and the reversing cavity 112 is connected to the reversing pipe 113.

[0044] like Figure 2 As shown, the flow control component 120 includes a mounting cavity 121 formed on the side of the intake pipe 111, a plug 122 with a spiral groove (not shown) on its side, a threaded rod 123 located inside the mounting cavity 121, and an adjusting rod 124 with a through end piece 110 extending into the mounting cavity 121. A limiting pin 125 with one end extending into the spiral groove is provided on the side wall of the mounting cavity 121. One end of the threaded rod 123 is threadedly connected to the plug 122, and the other end of the threaded rod 123 is rotatably connected to the inner wall of the mounting cavity 121 via a bearing (not shown). A meshing bevel gear 126 is fixedly connected to the threaded rod 123, and a rotating bevel gear 127 is fixedly connected to the end of the adjusting rod 124 extending into the mounting cavity 121. The meshing bevel gear 126 and the rotating bevel gear 127 mesh perpendicularly. The inner wall of the mounting cavity 121 is provided with a fixing block 128 with a fixing hole (not shown). The adjusting rod 124 passes through the fixing hole and is slidably connected to the fixing block 128. The fixing block 128 abuts against the rotating bevel gear 127. One end of the adjusting rod 124 extending out of the end piece 110 is provided with a handle 129.

[0045] The flow control member 120 adjusts the intake flow by changing the proportion of the plug 122 extending into the intake pipe 111, and the axial movement of the plug 122 is achieved by the cooperation of the threaded rod 123 and the limiting pin 125. When the adjusting rod 124 rotates, the rotating bevel gear 127 rotates, and through the meshing action, the meshing bevel gear 126 is driven to rotate, and in turn, the threaded rod 123 is rotated. Rotating the adjusting rod 124 drives the threaded rod 123 to rotate, and the limiting pin 125 extends into the spiral groove to provide a limiting effect and an axial force while rotating circumferentially, causing the plug 122 to rotate in a spiral manner and thereby achieving axial displacement, and in turn, controlling the intake flow. The limiting pin 125 can provide an axial force when the plug 122 rotates, and on the other hand, it can limit the axial displacement degree and the number of rotations of the plug 122, preventing the plug 122 from being detached from the threaded rod 123. The threaded rod 123 is rotationally connected to the mounting cavity 121 through bearings or the like, satisfying the axial fixation and circumferential rotation of the threaded rod 123. The fixed block 128 is used to fix the adjusting rod 124 and the rotating bevel gear 127, preventing the adjusting rod 124 from slipping and causing the rotating bevel gear 127 to disengage from the working position.

[0046] The axial length of the plug 122 is greater than or equal to the diameter of the intake pipe 111, the length of the threaded rod 123 is less than or equal to the axial length of the mounting cavity 121, and the axial length of the plug 122 and the length of the threaded rod 123 are greater than the sum of the diameter of the intake pipe 111 and the axial length of the mounting cavity 121. The above size relationship can improve the blocking proportion of the plug 122 to the intake pipe 111, preventing the plug 122 from being detached from the threaded rod 123.

[0047] The reversing member 130 includes a cylinder 131 with one open end and a connecting rod 132. The cylinder 131 is slidably connected to the reversing cavity 112, the closed end of the cylinder 131 is provided with a sealing member 133, and the part not covered by the sealing member 133 is provided with a through hole 134, and the sealing member 133 is arranged opposite to the sealing end face of the reversing pipe 113. One end of the connecting rod 132 extends into the cylinder 131, and the end of the connecting rod 132 extending into the cylinder 131 is provided with an inner edge 135, and the open end of the cylinder 131 is provided with an outer edge 136, and there is a gap between the cylinder 131 and the connecting rod 132 for gas flow. The sealing member 133 is a plate structure with an area greater than the cross-sectional area of the reversing pipe. The axial length of the connecting rod 132 is greater than the sum of the axial length of the inner cavity of the cylinder 131 and the thickness of the open end wall.

[0048] Example 2

[0049] As shown in Figure 3 , the reversing assembly 100 for controlling the intake flow includes an end piece 110, a flow control member 120, and a reversing member 130.

[0050] The end piece 110 is provided with an air inlet pipe 111, a reversing cavity 112 and a reversing pipe 113, and the reversing cavity 112 is communicated with the reversing pipe 113.

[0051] As shown in Figure 2 , the flow control piece 120 comprises a mounting cavity 121 opened in the side surface of the air inlet pipe 111, a plug 122 with a helical groove (not shown) opened in the side surface, a threaded rod 123 located in the mounting cavity 121, and an adjusting rod 124 penetrating the end piece 110 and extending into the mounting cavity 121, and the side wall of the mounting cavity 121 is provided with a limiting pin 125 extending into the helical groove. One end of the threaded rod 123 is threadedly connected with the plug 122, and the other end of the threaded rod 123 is rotatably connected with the inner wall of the mounting cavity 121 through a bearing (not shown). The threaded rod 123 is fixedly connected with an engaging bevel gear 126, the adjusting rod 124 is fixedly connected with a rotating bevel gear 127 at the end extending into the mounting cavity 121, and the engaging bevel gear 126 and the rotating bevel gear 127 are vertically engaged. The inner wall of the mounting cavity 121 is provided with a fixing block 128 with a fixing hole (not shown) opened therein, the adjusting rod 124 is slidingly connected with the fixing block 128 through the fixing hole, and the fixing block 128 is in abutment with the rotating bevel gear 127. The end of the adjusting rod 124 extending out of the end piece 110 is provided with a handle 129.

[0052] The reversing piece 130 comprises a cylinder 131 with an open end and a connecting rod 132. The cylinder 131 is slidingly connected with the reversing cavity 112, the outer side of the closed end of the cylinder 131 is provided with a sealing piece 133, and the part not covered by the sealing piece 133 is provided with a through hole 134, and the sealing piece 133 is arranged opposite to the sealing end surface of the reversing pipe 113. One end of the connecting rod 132 extends into the cylinder 131, the end of the connecting rod 132 extending into the cylinder 131 is provided with an inner edge portion 135, the open end of the cylinder 131 is provided with an outer edge portion 136, and there is a gap between the cylinder 131 and the connecting rod 132 for gas flow. The sealing piece 133 is a suction disc structure with an area greater than the cross-sectional area of the reversing pipe.

[0053] Embodiment 3

[0054] As shown in Figure 4 , the reversing assembly 100 for controlling the air inlet flow comprises an end piece 110, a flow control piece 120 and a reversing piece 130.

[0055] The end piece 110 is provided with an air inlet pipe 111, a reversing cavity 112 and a reversing pipe 113, and the reversing cavity 112 is communicated with the reversing pipe 113.

[0056] As shown in Figure 2As shown, the flow control member 120 includes a mounting cavity 121 opened in the side of the air inlet pipe 111, a plug 122 with a helical groove (not shown) opened in the side, a threaded rod 123 inside the mounting cavity 121, and an adjusting rod 124 extending into the mounting cavity 121 through the end piece 110. The side wall of the mounting cavity 121 is provided with a limiting pin 125 extending into the helical groove. One end of the threaded rod 123 is threadedly connected with the plug 122, and the other end of the threaded rod 123 is rotatably connected with the inner wall of the mounting cavity 121 through a bearing (not shown). The threaded rod 123 is fixedly connected with an engaging bevel gear 126, and the adjusting rod 124 is fixedly connected with a rotating bevel gear 127 at the end extending into the mounting cavity 121. The engaging bevel gear 126 and the rotating bevel gear 127 are vertically engaged. The inner wall of the mounting cavity 121 is provided with a fixing block 128 with a fixing hole (not shown) opened therein, and the adjusting rod 124 is slidably connected with the fixing block 128 through the fixing hole. The fixing block 128 is in abutment with the rotating bevel gear 127. The end of the adjusting rod 124 extending out of the end piece 110 is provided with a handle 129.

[0057] The reversing member 130 includes a cylinder 131 with an open end and a connecting rod 132. The cylinder 131 is slidably connected with the reversing cavity 112. The outer side of the closed end of the cylinder 131 is provided with a sealing member 133, and the part not covered by the sealing member 133 is provided with a through hole 134. The sealing member 133 is arranged opposite to the sealing end surface of the reversing pipe 113. One end of the connecting rod 132 extends into the cylinder 131. The end of the connecting rod 132 extending into the cylinder 131 is provided with an inner edge portion 135. The open end of the cylinder 131 is provided with an outer edge portion 136. There is a gap between the cylinder 131 and the connecting rod 132 for gas flow. The sealing member 133 extends into the reversing pipe 113 to seal the reversing pipe.

[0058] Example 4

[0059] As shown in the figure, the reversing assembly 100 for controlling the air inlet flow includes an end piece 110, a flow control member 120, and a reversing member 130. Figure 5 The end piece 110 is provided with an air inlet pipe 111, a reversing cavity 112, and a reversing pipe 113. The reversing cavity 112 is in communication with the reversing pipe 113.

[0060]

[0061] ​The flow control member 120 comprises a mounting cavity 121 formed in the side of the air inlet pipe 111, a plug 122 with a helical groove (not shown) formed in the side, a threaded rod 123 located inside the mounting cavity 121, and an adjusting rod 124 extending through the end member 110 into the mounting cavity 121. The side wall of the mounting cavity 121 is provided with a limiting pin 125 extending into the helical groove. One end of the threaded rod 123 is threadedly connected with the plug 122, and the other end of the threaded rod 123 is rotatably connected with the inner wall of the mounting cavity 121 through a bearing (not shown). The adjusting rod 124 is used to drive the threaded rod 123 to rotate, thereby driving the plug 122 to rotate helically.

[0062] The reversing member 130 comprises a cylinder 131 with one end open and a connecting rod 132. The cylinder 131 is slidably connected with the reversing cavity 112. The outer side of the closed end of the cylinder 131 is provided with a sealing member 133, and the part not covered by the sealing member 133 is provided with a through hole 134. The sealing member 133 is arranged opposite to the sealing end surface of the reversing pipe 113. One end of the connecting rod 132 extends into the cylinder 131 and is used to drive the cylinder 131 to move axially.

[0063] Embodiment 5

[0064] As shown in Figure 5 , the air bag pump comprises a reversing assembly 100 and an air bag 200.

[0065] The reversing assembly 100 comprises an end member 110, a flow control member 120, and a reversing member 130.

[0066] The end member 110 is provided with an air inlet pipe 111, a reversing cavity 112, and a reversing pipe 113. The reversing cavity 112 is in communication with the reversing pipe 113.

[0067] As shown in Figure 2 , the flow control member 120 comprises a mounting cavity 121 formed in the side of the air inlet pipe 111, a plug 122 with a helical groove (not shown) formed in the side, a threaded rod 123 located inside the mounting cavity 121, and an adjusting rod 124 extending through the end member 110 into the mounting cavity 121. The side wall of the mounting cavity 121 is provided with a limiting pin 125 extending into the helical groove. One end of the threaded rod 123 is threadedly connected with the plug 122, and the other end of the threaded rod 123 is rotatably connected with the inner wall of the mounting cavity 121 through a bearing (not shown). The threaded rod 123 is fixedly connected with a meshing bevel gear 126, and the adjusting rod 124 is fixedly connected with a rotating bevel gear 127 at the end extending into the mounting cavity 121. The meshing bevel gear 126 and the rotating bevel gear 127 are vertically engaged. The inner wall of the mounting cavity 121 is provided with a fixing block 128 with a fixing hole (not shown) formed therein. The adjusting rod 124 extends through the fixing hole and is slidably connected with the fixing block 128. The fixing block 128 is in abutment with the rotating bevel gear 127. The end of the adjusting rod 124 extending out of the end member 110 is provided with a handle 129.

[0068] The flow control member 120 adjusts the air intake flow by changing the proportion of the plug 122 extending into the air intake pipe 111, and the axial movement of the plug 122 is realized by the cooperation of the threaded rod 123 and the limiting pin 125. When the adjusting rod 124 rotates, the rotating bevel gear 127 rotates, and through the meshing action, the meshing bevel gear 126 is driven to rotate, and then the threaded rod 123 is rotated. Rotating the adjusting rod 124 drives the threaded rod 123 to rotate, and the threaded rod 123 rotates circumferentially while the limiting pin 125 extends into the spiral groove to provide a limiting effect and an axial force, so that the plug 122 rotates in a spiral manner to realize axial displacement, thereby realizing control of the air intake flow. The limiting pin 125 can provide an axial force when the plug 122 rotates, and can limit the axial displacement degree and the number of rotations of the plug 122, preventing the plug 122 from being detached from the threaded rod 123. The threaded rod 123 is rotatably connected to the mounting cavity 121 through bearings and the like, which satisfies the axial fixation and circumferential rotation of the threaded rod 123. The fixed block 128 is used to fix the adjusting rod 124 and the rotating bevel gear 127, preventing the adjusting rod 124 from sliding and causing the rotating bevel gear 127 to disengage from the working position.

[0069] The axial length of the plug 122 is greater than or equal to the diameter of the air intake pipe 111, the length of the threaded rod 123 is less than or equal to the axial length of the mounting cavity 121, and the axial length of the plug 122 and the length of the threaded rod 123 are greater than the sum of the diameter of the air intake pipe 111 and the axial length of the mounting cavity 121. The above size relationship can improve the blocking proportion of the plug 122 to the air intake pipe 111, and prevent the plug 122 from being detached from the threaded rod 123.

[0070] The reversing member 130 includes a cylinder 131 with one open end and a connecting rod 132. The cylinder 131 is slidably connected to the reversing cavity 112, the outer side of the closed end of the cylinder 131 is provided with a sealing member 133, and the part not covered by the sealing member 133 is provided with a through hole 134, and the sealing member 133 is arranged opposite to the sealing end face of the reversing pipe 113. One end of the connecting rod 132 extends into the cylinder 131, and the end of the connecting rod 132 extending into the cylinder 131 is provided with an inner edge 135, and the open end of the cylinder 131 is provided with an outer edge 136, and there is a gap between the cylinder 131 and the connecting rod 132 for gas flow. The sealing member 133 is a plate structure with an area greater than the cross-sectional area of the reversing pipe. The axial length of the connecting rod 132 is greater than the sum of the axial length of the inner cavity of the cylinder 131 and the thickness of the open end wall.

[0071] The end member 110 is connected to the air bag 200 to surround the open end of the driving air bag 210 of the air bag 200, the air intake pipe 111 communicates with the driving air bag 210, and the end of the connecting rod 132 extending out of the cylinder 131 is connected to the air bag 200.

[0072] When the air bag 200 is stretched, the connecting rod 132 moves with the air bag 200 away from the closed end of the cylinder 131, and when the inner edge 135 contacts the outer edge 136, the connecting rod 132 drives the cylinder 131 to move to separate the sealing piece 133 from the sealing end surface of the reversing pipe 113, the gas in the air bag 200 is discharged through the reversing pipe 113, and the air bag 200 is reversed to the compression direction. When the air bag 200 is compressed, the connecting rod 132 moves with the air bag 200 to the closed end of the cylinder 131, and when the inner edge 135 contacts the closed end, the connecting rod 132 drives the cylinder 131 to move to the reversing pipe 113 to make the sealing piece 133 contact the sealing end surface of the reversing pipe 113 to form a seal, at this time, the air inlet pipe 111 supplies air to the air bag 200, and the air bag 200 is reversed to the stretching direction.

[0073] The preferred embodiments of the present application have been described above by way of example only, not for limitation, and various changes and modifications can be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A reversing assembly for controlling the flow of intake air, characterized by, The reversing assembly for the wind bag pump comprises an end piece, a flow control piece and a reversing piece. The end piece is provided with an air inlet pipe, a reversing cavity and a reversing pipe, and the reversing cavity is communicated with the reversing pipe. The flow control piece comprises a mounting cavity opened on the side of the air inlet pipe, a tap with a helical slot opened on the side, a threaded rod located inside the mounting cavity and an adjusting rod penetrating the end piece and extending into the mounting cavity, the side wall of the mounting cavity is provided with a limiting pin extending into the helical slot, one end of the threaded rod is threadedly connected with the tap, the other end of the threaded rod is rotationally connected with the inner wall of the mounting cavity, and the adjusting rod is used to drive the threaded rod to rotate and in turn drive the tap to rotate. The reversing piece comprises a cylinder with an open end and a connecting rod, the cylinder is slidably connected with the reversing cavity, the outer side of the closed end of the cylinder is provided with a sealing piece, and the part of the outer side of the closed end of the cylinder not covered by the sealing piece is provided with a through hole, the sealing piece is arranged opposite to the sealing end surface of the reversing pipe, and one end of the connecting rod extends into the cylinder and is used to drive the cylinder to slide.

2. The commutation assembly of claim 1, wherein, The threaded rod is fixedly connected with an engaging bevel gear, one end of the adjusting rod extending into the mounting cavity is fixedly connected with a rotating bevel gear, and the engaging bevel gear and the rotating bevel gear are vertically engaged.

3. The commutation assembly of claim 2, wherein, The inner wall of the mounting cavity is provided with a fixing block with a fixing hole, the adjusting rod penetrates the fixing hole and is slidably connected with the fixing block, and the fixing block abuts against the rotating bevel gear.

4. The commutation assembly of claim 1, wherein, The axial length of the tap is greater than or equal to the diameter of the air inlet pipe, the length of the threaded rod is less than or equal to the axial length of the mounting cavity, and the axial length of the tap and the length of the threaded rod are greater than the sum of the diameter of the air inlet pipe and the axial length of the mounting cavity.

5. The commutation assembly of claim 1, wherein, One end of the adjusting rod extending out of the end piece is provided with a handle.

6. The commutation assembly of claim 1, wherein, One end of the connecting rod extending into the cylinder is provided with an inner edge, the open end of the cylinder is provided with an outer edge, and there is a gap between the cylinder and the connecting rod for gas flow.

7. The commutation assembly of claim 1, wherein, The axial length of the connecting rod is greater than the sum of the axial length of the inner cavity of the cylinder and the thickness of the open end wall.

8. The commutation assembly of claim 1, wherein, The sealing piece is a plate-shaped structure or a sucker-shaped structure with an area greater than the cross-sectional area of the reversing pipe.

9. The commutation assembly of claim 1, wherein, The sealing piece extends into the reversing pipe to seal the reversing pipe.

10. A wind sock pump characterized by, The reversing assembly comprises the end piece, the flow control piece and the reversing piece, and the end piece is connected with the wind bag to surround the open end of a driving air bag of the wind bag, the air inlet pipe is communicated with the driving air bag, and one end of the connecting rod extending out of the cylinder is connected with the wind bag.

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