CN115807867A - Check valve and fluid delivery system - Google Patents

Abstract

The invention provides a one-way valve and a fluid conveying system. Wherein, the valve body is equipped with first passageway, and the outer wall of valve body is equipped with the first connecting portion that sets up along the circumferential direction of first passageway. The valve plate is rotationally engaged with the valve body so that the valve plate can open or close the first passage. The first connecting piece is provided with a second channel, and the outer wall of the first connecting piece is provided with a second connecting part. The second connecting piece is provided with a third channel, and the outer wall of the second connecting piece is provided with a third connecting part. When the two ends of the first channel are respectively communicated with the second channel and the third channel correspondingly, the first connecting part is in sealing fit with the second connecting part and the third connecting part. The check valve in this application forms through the mode of assembly, and its is small, light in weight, is convenient for install and carry. In addition, the valve plate is connected with the valve body in a rotating mode, opening pressure is almost not generated, and the sensitivity of the one-way valve and the sensitivity of the fluid conveying system are improved.

Description

Check valve and fluid delivery system

technical field

The invention relates to the field of fluid delivery, in particular to a check valve and a fluid delivery system.

Background technique

Check valves can be used in hydraulic systems to prevent reverse flow of liquid, or in pneumatic systems to prevent reverse flow of compressed air. The traditional one-way valve is formed by casting. Therefore, the traditional one-way valve is bulky, heavy and inconvenient to carry.

Contents of the invention

Based on this, it is necessary to provide a one-way valve and a fluid delivery system to solve the problems that the traditional one-way valve is bulky, heavy and inconvenient to carry.

Its technical scheme is as follows:

In one aspect, a check valve is provided, comprising:

A valve body, the valve body is provided with a first channel, and the outer wall of the valve body is provided with a first connecting portion arranged along the circumferential direction of the first channel;

a valve plate, the valve plate is rotatably engaged with the valve body, so that the valve plate can open or close the first channel;

a first connecting piece, the first connecting piece is provided with a second channel, and the outer wall of the first connecting piece is provided with a second connecting portion arranged along the circumferential direction of the second channel; and

a second connecting piece, the second connecting piece is provided with a third channel, and the outer wall of the second connecting piece is provided with a third connecting portion arranged along the circumferential direction of the third channel;

Wherein, when the two ends of the first channel communicate with the second channel and the third channel respectively, the first connecting part is in sealing fit with the second connecting part and the third connecting part.

The technical scheme is further described below:

In one of the embodiments, the one-way valve further includes a sealing member provided with a through hole, the inner wall of the through hole is in sealing connection with the first connecting part, when the two ends of the first channel are respectively connected to the second When the second channel and the third channel communicate with each other, the sealing member can seal fit with both the second connecting portion and the third connecting portion.

In one of the embodiments, the inner wall of the through hole is provided with a first groove arranged along the axial direction of the first channel, and the first connecting part is inserted into the first groove and is connected with the first groove. The inner wall of the first groove is sealed and connected.

In one of the embodiments, the side of the second connecting part close to the first connecting part is provided with a second groove arranged along the circumferential direction of the second channel, and the sealing member A first protrusion is provided along the axial direction of the channel and on a side close to the second connecting part, the first protrusion is arranged along the circumferential direction of the first channel and corresponds to the second groove, When both ends of the first channel communicate with the second channel and the third channel respectively, the first protrusion is sealingly connected with the inner wall of the second groove;

And/or, the side of the third connecting part close to the first connecting part is provided with a third groove arranged along the circumferential direction of the third channel, and the sealing member The second protrusion on the side of the axial direction and close to the third connecting part, the third protrusion is arranged along the circumferential direction of the first passage and corresponding to the third groove, when the first When two ends of a channel communicate with the second channel and the third channel respectively, the second protrusion is in sealing connection with the inner wall of the third groove.

In one of the embodiments, the one-way valve further includes a locking member, and the locking member is used to lock the first connecting part, the second connecting part and the third connecting part as one .

In one of the embodiments, the outer diameter of the sealing member is larger than the outer diameter of the second connecting portion and the outer diameter of the third connecting portion, and the locking member is configured as a clamp, when the clamp When the first connecting part, the second connecting part and the third connecting part are locked into one body, the sealing member is in conflict with the inner wall of the clamp.

In one of the embodiments, the one-way valve further includes a sealing sleeve, the sealing sleeve is passed through the first channel, and the outer wall of the sealing sleeve near the end of the first connecting piece is provided along the a first flange disposed in the circumferential direction of the first channel, the first flange fits on the end of the valve body close to the first connecting piece, when the valve plate closes the first channel, The first flange is capable of sealingly engaging the valve plate with the valve body.

In one of the embodiments, the end of the valve body close to the first connecting piece is provided with a fourth connecting portion for rotationally connecting with the valve plate, and the first flange is provided with a fourth connecting portion. Corresponding to the avoidance groove set at the top.

In one of the embodiments, the outer wall of the sealing sleeve near the end of the second connecting piece is provided with a second flange along the circumferential direction of the first channel, and the second flange is connected to the The valve body is attached to one end of the second connecting piece, and when the two ends of the first channel communicate with the second channel and the third channel respectively, the second flange can connect the valve body to the second channel. The second connecting part is sealed.

In another aspect, a fluid delivery system is provided, which is characterized by including the one-way valve.

In the one-way valve and the fluid delivery system in the above embodiments, when in use, the first connecting piece and the second connecting piece are correspondingly connected to the connection in the fluid delivery system, and the valve plate can close the first channel under the action of gravity . When the fluid in the fluid delivery system flows forward, the valve plate can open the first channel under the impact force of the fluid to ensure that the fluid can pass through the third channel, the first channel and the second channel smoothly. When the fluid in the fluid delivery system flows in the reverse direction, the valve plate will be more closely opposed to the valve body under the impact force of the fluid, so as to ensure that the fluid cannot pass through the first channel. Compared with the traditional cast one-way valve, the one-way valve in the present application is formed by assembly, which is small in size and light in weight, and is easy to install and carry. In addition, compared with the traditional threaded one-way valve, the valve plate and the valve body are rotatably connected in this application, so there is almost no cracking pressure, which improves the sensitivity of the one-way valve and the fluid delivery system.

Description of drawings

The accompanying drawings constituting a part of this application are used to provide further understanding of the present invention, and the schematic embodiments and descriptions of the present invention are used to explain the present invention, and do not constitute an improper limitation of the present invention.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained based on these drawings without creative effort.

Fig. 1 is the explosion diagram of the one-way valve of an embodiment;

Fig. 2 is a schematic structural view of the one-way valve in Fig. 1 when the locking member is not assembled;

Fig. 3 is a schematic structural view of the seal in Fig. 1;

Fig. 4 is a schematic structural diagram of the first connector in Fig. 1;

FIG. 5 is a schematic structural diagram of the sealing sleeve in FIG. 1 .

Explanation of reference signs:

10. One-way valve; 100. Valve body; 110. First channel; 120. First connecting part; 130. Fourth connecting part; 200. Valve plate; 300. First connecting piece; 310. Second channel; 320 , the second connecting portion; 330, the second groove; 400, the second connecting piece; 410, the third channel; 420, the third connecting portion; 500, the seal; 510, the through hole; 520, the first groove; 530, the first protrusion; 540, the second protrusion; 600, the locking member; 700, the sealing sleeve; 710, the first flange; 711, the escape groove; 720, the second flange.

Detailed ways

In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

In one embodiment, a fluid delivery system comprising a one-way valve 10 is provided. In this way, the one-way valve 10 can effectively prevent the fluid in the fluid delivery system from flowing backwards, improving the reliability of the fluid delivery system.

Wherein, the fluid can be liquid or gas.

As shown in FIGS. 1 and 2 , in one embodiment, a one-way valve 10 is provided, including a valve body 100 , a valve plate 200 , a first connecting piece 300 and a second connecting piece 400 . Wherein, the valve body 100 is provided with a first channel 110 , and the outer wall of the valve body 100 is provided with a first connecting portion 120 arranged along the circumferential direction of the first channel 110 . The valve plate 200 is rotatably matched with the valve body 100 so that the valve plate 200 can open or close the first channel 110 . The first connecting part 300 is provided with a second channel 310 , and the outer wall of the first connecting part 300 is provided with a second connecting part 320 arranged along the circumferential direction of the second channel 310 . The second connecting part 300 is provided with a third channel 410 , and the outer wall of the second connecting part 400 is provided with a third connecting part 420 arranged along the circumferential direction of the third channel 410 . When the two ends of the first channel 110 communicate with the second channel 310 and the third channel 410 respectively, the first connection part 120 and the second connection part 320 and the third connection part 420 are sealed.

In the one-way valve 10 in the above embodiment, when in use, the first connector 300 and the second connector 400 are correspondingly connected to the connection in the fluid delivery system, and the valve plate 200 can close the first channel under the action of gravity 110. When the fluid in the fluid delivery system flows in the forward direction (as shown in the direction A in FIG. 2 ), the valve plate 200 can open the first channel 110 under the impact of the fluid to ensure that the fluid can pass through the third channel 410 smoothly. , the first channel 110 and the second channel 310 . When the fluid in the fluid delivery system flows in the reverse direction (as shown in the B direction in FIG. 2 ), the valve plate 200 is more tightly opposed to the valve body 100 under the impact force of the fluid, ensuring that the fluid cannot pass through the first channel 110 . Compared with traditional cast one-way valves, the one-way valve 10 in the present application is formed by assembly, which is small in size and light in weight, and is easy to install and carry. In addition, compared with the traditional threaded one-way valve, the valve plate 200 is rotatably connected with the valve body 100 in this application, so there is almost no cracking pressure, which improves the sensitivity of the one-way valve 10 .

Wherein, both the first connecting piece 300 and the second connecting piece 400 can be flanges, clamp joints or other connecting structures. The first connecting piece 300 and the second connecting piece 400 can be correspondingly connected to the joints in the fluid delivery system by plugging or screwing.

Wherein, the valve plate 200 is rotatably matched with the valve body 100, which may be a rotatable connection between the valve plate 200 and one end of the valve body 100, or may be a rotatable connection between the valve plate 200 and the inner wall of the first channel 110, as long as the valve plate 200 can correspond to It only needs to open or close the first channel 110 . The valve plate 200 may be a thin plate made of 316L material. In this way, the sensitivity of the one-way valve 10 is further improved.

Wherein, the first connecting portion 120 may be disposed at one end of the valve body 100 or at the middle of the valve body 100 . The outer diameter of the valve body 100 can be flexibly adjusted according to actual needs. The valve plate 200 may be disposed at one end of the valve body 100 or in the middle of the valve body 100 . Specifically in this embodiment, the first connecting portion 120 is configured as a first annular flange. The second connecting portion 320 is configured as a second annular flange. The third connecting portion 420 is configured as a third annular flange. The valve plate 200 is set at one end of the valve body 100 , the first connecting portion 120 is set at the end of the valve body 100 away from the valve plate 200 , and one of the first connecting piece 300 and the second connecting piece 400 is sleeved on the outer wall of the valve body 100 .

As shown in Figures 1 and 2, further, the one-way valve 10 further includes a seal 500 with a through hole 510, the inner wall of the through hole 510 is in sealing connection with the first connecting part 120, when the two ends of the first channel 110 When communicating with the second channel 310 and the third channel 410 respectively, the sealing member 500 can seal fit with both the second connection part 320 and the third connection part 420 . In this way, the reliability of the seal between the first connecting piece 300 , the valve body 100 and the second connecting piece 400 is increased, preventing fluid from flowing from between the first connecting piece 300 and the valve body 100 or from between the second connecting piece 400 and the valve body 100 Intermittent leakage improves the reliability of the one-way valve 10.

Wherein, the sealing member 500 may be a sealing gasket, a sealing ring or other sealing connections.

As shown in FIGS. 1 and 3 , optionally, the inner wall of the through hole 510 is provided with a first groove 520 arranged along the axial direction of the first channel 110 , and the first connecting portion 120 is plugged into the first groove 520 Fit and sealingly connect with the inner wall of the first groove 520 . In this way, the sealing member 500 can be fixed on the first connection part 120 so as to seal the first connection part 120 with the second connection part 320 and the third connection part 420 . In addition, the first connecting part 120 is inserted into the first groove 520, so that the contact area between the first connecting part 120 and the sealing member 500 increases, so that the first connecting part 120 and the second connecting part 320 and the third The reliability of the sealing fit between the connection parts 420 is increased, thereby improving the reliability of the one-way valve 10 .

As shown in Figure 1, Figure 3 and Figure 4, optionally, the side of the second connecting part 320 close to the first connecting part 120 is provided with a second groove 330 arranged along the circumferential direction of the second channel 310, sealing The member 500 is provided with a first protrusion 530 along the axial direction of the first channel 110 and on a side close to the second connecting portion 320 , and the first protrusion 530 is along the circumferential direction of the first channel 110 and corresponds to the second groove 330 It is provided that when the two ends of the first channel 110 communicate with the second channel 310 and the third channel 410 respectively, the first protrusion 530 is in sealing connection with the inner wall of the second groove 330 . In this way, the contact area between the second connecting portion 320 and the sealing member 500 is increased, so that the reliability of the sealing fit between the first connecting portion 120 and the second connecting portion 320 is increased, and the reliability of the one-way valve 10 is improved.

As shown in FIG. 1 and FIG. 3 , optionally, the side of the third connecting portion 420 close to the first connecting portion 120 is provided with a third groove arranged along the circumferential direction of the third channel 410 , and the sealing member 500 is along the The axial direction of the first channel 110 and the second protrusion 540 on the side close to the third connecting part 420, the third protrusion is arranged along the circumferential direction of the first channel 110 and corresponding to the third groove, when the first channel 110 When the two ends of the second protrusion 540 communicate with the second channel 310 and the third channel 410 respectively, the second protrusion 540 is in sealing connection with the inner wall of the third groove. In this way, the contact area between the third connecting portion 420 and the sealing member 500 is increased, so that the reliability of the sealing fit between the first connecting portion 120 and the third connecting portion 420 is increased, and the reliability of the one-way valve 10 is improved.

Specifically in this embodiment, the structural shape of the second connecting member 400 is the same as that of the first connecting member 300 .

As shown in FIG. 1 , in one embodiment, the one-way valve 10 further includes a locking member 600, and the locking member 600 is used to lock the first connecting portion 120, the second connecting portion 320 and the third connecting portion 420 as One. In this way, the first connecting piece 300 , the valve body 100 and the second connecting piece 400 can be locked together stably and reliably, which improves the reliability of the one-way valve 10 .

Wherein, the locking member 600 may be a clamp, a bolt or other locking structures.

As shown in FIG. 1 , FIG. 2 and FIG. 3 , optionally, the outer diameter of the sealing member 500 is larger than the outer diameter of the second connecting portion 320 and the outer diameter of the third connecting portion 420 , and the locking member 600 is configured as a hoop. When the clip locks the first connecting portion 120 , the second connecting portion 320 and the third connecting portion 420 into one body, the sealing member 500 interferes with the inner wall of the clip. In this way, the sealing member 500 can fill the gap between the clamp and the valve body 100, ensuring that the valve body 100, the first connecting member 300, the second connecting member 400 and the clamp will not move relative to each other, improving the one-way sealing effect. Valve 10 reliability.

As shown in FIG. 1 , FIG. 2 and FIG. 5 , in one embodiment, the one-way valve 10 further includes a sealing sleeve 700 , the sealing sleeve 700 is passed through the first channel 110 , and the sealing sleeve 700 is close to one end of the first connecting member 300 The outer wall of the outer wall is provided with a first flange 710 arranged along the circumferential direction of the first passage 110, and the first flange 710 fits with the end of the valve body 100 close to the first connecting piece 300, when the valve plate 200 closes the first passage 110 , the first flange 710 can seal the valve plate 200 with the valve body 100 . In this way, when the valve plate 200 closes the first channel 110, the first flange 710 can fill the gap between the valve plate 200 and the valve body 100, preventing fluid from leaking from the connection between the valve plate 200 and the valve body 100, ensuring that the fluid does not The reverse flow in the one-way valve 10 improves the reliability of the one-way valve 10 .

As shown in Figures 1 and 5, further, the end of the valve body 100 close to the first connecting piece 300 is provided with a fourth connecting part 130 for rotationally connecting with the valve plate 200, and the first flange 710 is provided with a fourth connecting part 130. The part 130 corresponds to the escape groove 711 provided. In this way, the valve plate 200 will not interfere with the first flange 710 during the process of opening or closing the first channel 110 , which improves the reliability of the one-way valve 10 .

Optionally, the fourth connecting part 130 includes a first connecting plate and a second connecting plate arranged at intervals, the first connecting plate is provided with a first connecting hole, and the second connecting plate is provided with a second connecting plate corresponding to the first connecting hole. The connecting hole, the valve plate 200 is provided with a connecting channel, and the one-way valve 10 also includes a connecting pin, which can sequentially pass through the first connecting hole, the connecting channel and the second connecting hole to rotatably connect the valve plate 200 to the valve body 100 . In this way, it is ensured that the valve plate 200 can rotate smoothly relative to the valve body 100 to open or close the first channel 110 .

As shown in FIG. 1 , FIG. 2 and FIG. 5 , optionally, the outer wall of the sealing sleeve 700 near the end of the second connecting piece 400 is provided with a second Flange 720, the second flange 720 fits with the end of the valve body 100 close to the second connecting piece 400, when the two ends of the first channel 110 are respectively connected to the second channel 310 and the third channel When 410 is correspondingly communicated, the second flange 720 can seal fit the valve body 100 with the second connecting piece 400 . In this way, the second flange 720 can fill the gap between the second connecting piece 400 and the valve body 100, preventing fluid from leaking from the gap between the valve body 100 and the second connecting piece 400, and improving the reliability of the one-way valve 10. sex.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial" , "radial", "circumferential" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the referred device or Elements must have certain orientations, be constructed and operate in certain orientations, and therefore should not be construed as limitations on the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

In the present invention, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrated; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise specified limit. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

In the present invention, unless otherwise clearly specified and limited, the first feature may be in direct contact with the first feature or the first and second feature may be in direct contact with the second feature through an intermediary. touch. Moreover, "above", "above" and "above" the first feature on the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "beneath" and "beneath" the first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is less horizontally than the second feature.

It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions are for the purpose of illustration only and are not intended to represent the only embodiment.

It should also be understood that when explaining the connection relationship or positional relationship of elements, although not explicitly described, the connection relationship and positional relationship are interpreted as including an error range, and the error range should be accepted by a specific value determined by those skilled in the art. within the range of deviation. For example, "about," "approximately," or "substantially" can mean within one or more standard deviations, without limitation.

The technical features of the above embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, they should be It is considered to be within the range described in this specification.

The above examples only express several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it should not be construed as limiting the scope of the patent for the invention. It should be pointed out that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention should be based on the appended claims.

Claims (10)

1. A check valve, characterized in that, comprising: A valve body, the valve body is provided with a first channel, and the outer wall of the valve body is provided with a first connecting portion arranged along the circumferential direction of the first channel; a valve plate, the valve plate is rotatably engaged with the valve body, so that the valve plate can open or close the first channel; a first connecting piece, the first connecting piece is provided with a second channel, and the outer wall of the first connecting piece is provided with a second connecting portion arranged along the circumferential direction of the second channel; and a second connecting piece, the second connecting piece is provided with a third channel, and the outer wall of the second connecting piece is provided with a third connecting portion arranged along the circumferential direction of the third channel; Wherein, when the two ends of the first channel communicate with the second channel and the third channel respectively, the first connecting part is in sealing fit with the second connecting part and the third connecting part. 2. The one-way valve according to claim 1, characterized in that, the one-way valve further comprises a seal member provided with a through hole, the inner wall of the through hole is in sealing connection with the first connecting portion, when the When the two ends of the first channel communicate with the second channel and the third channel respectively, the sealing member can seal fit with both the second connecting part and the third connecting part. 3. The one-way valve according to claim 2, characterized in that, the inner wall of the through hole is provided with a first groove arranged along the axial direction of the first channel, and the first connecting portion is connected with the The first groove is plug-fitted and sealed with the inner wall of the first groove. 4. The one-way valve according to claim 2, characterized in that, a side of the second connecting portion close to the first connecting portion is provided with a second recess arranged along the circumferential direction of the second passage. a groove, the seal is provided with a first protrusion along the axial direction of the first channel and on a side close to the second connecting part, and the first protrusion is along the circumferential direction of the first channel and Corresponding to the second groove, when the two ends of the first channel communicate with the second channel and the third channel respectively, the first protrusion is sealingly connected with the inner wall of the second groove; And/or, the side of the third connecting part close to the first connecting part is provided with a third groove arranged along the circumferential direction of the third channel, and the sealing member The second protrusion on the side of the axial direction and close to the third connecting part, the third protrusion is arranged along the circumferential direction of the first passage and corresponding to the third groove, when the first When two ends of a channel communicate with the second channel and the third channel respectively, the second protrusion is in sealing connection with the inner wall of the third groove. 5. The one-way valve according to claim 2, characterized in that, the one-way valve further comprises a locking member, and the locking member is used to connect the first connecting portion, the second connecting portion and The third connecting part is locked as a whole. 6. The one-way valve according to claim 5, wherein the outer diameter of the sealing member is larger than the outer diameters of the second connecting portion and the third connecting portion, and the locking member It is set as a clamp, and when the clamp locks the first connection part, the second connection part and the third connection part into one body, the sealing member interferes with the inner wall of the clamp . 7. The one-way valve according to any one of claims 1 to 6, characterized in that, the one-way valve further comprises a sealing sleeve, the sealing sleeve is passed through the first channel, and the sealing sleeve is close to The outer wall of one end of the first connecting piece is provided with a first flange arranged along the circumferential direction of the first channel, and the first flange is in close contact with the end of the valve body close to the first connecting piece. When the valve plate closes the first channel, the first flange can seal the valve plate with the valve body. 8. The one-way valve according to claim 7, characterized in that, one end of the valve body close to the first connecting piece is provided with a fourth connecting portion for rotationally connecting with the valve plate, and the first The flange is provided with an escape groove corresponding to the fourth connecting portion. 9. The one-way valve according to claim 7, characterized in that, the outer wall of the sealing sleeve near the end of the second connecting piece is provided with a second flange arranged along the circumferential direction of the first channel , the second flange is attached to the end of the valve body close to the second connecting piece, when the two ends of the first channel communicate with the second channel and the third channel respectively, the second channel The flange is capable of sealingly fitting the valve body with the second connecting piece. 10. A fluid delivery system, characterized by comprising the one-way valve according to any one of claims 1-9.

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