One-way valve and metering pump with same

Abstract

The utility model discloses a one-way valve and a metering pump with the same, the one-way valve comprises a valve body, a sealing ring and a valve core assembly, a flow channel is formed in the valve body, and an annular boss is arranged on the inner wall of the flow channel; the sealing ring is arranged in the flow channel, and one side of the sealing ring abuts against the annular boss. The valve element assembly is arranged in the flow channel, comprises an elastic piece, a plugging piece and a fixing base and is detachably connected with the valve body through the fixing base. The fixing base abuts against the side, away from the annular boss, of the sealing ring, and the sealing ring is tightly pressed on the annular boss. The elastic piece is connected with the plugging piece and used for providing elastic force enabling the plugging piece to be tightly attached to the sealing ring. According to the one-way valve, when the sealing ring needs to be replaced after being abraded, the whole valve element assembly and the sealing ring can be taken out of the flow channel only by releasing the connection between the fixing base and the valve body, and therefore the sealing ring can be conveniently maintained and replaced.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a one-way valve and a metering pump having the same. Background Art

[0002] A one-way valve is a valve element used to prevent the reverse flow of fluid; in the related art, the one-way valve includes a valve body, a sealing member, an elastic member and a sealing ring, wherein the elastic member, the sealing member and the sealing ring are all arranged in the valve body, and the sealing ring can cooperate with the sealing member and the elastic member to achieve a one-way closure of the flow channel in the valve body; since the one-way valve needs to be frequently operated to achieve opening and closing switching during operation, and the sealing ring is easily worn due to the corrosive effect of the fluid, however, since the sealing ring is installed inside the valve body, it is not convenient to maintain and replace the sealing ring. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a one-way valve, which not only has good sealing performance but also is easy to maintain.

[0004] The utility model also provides a metering pump with the one-way valve.

[0005] The one-way valve according to the first aspect of the present invention comprises a valve body, a sealing ring and a valve core assembly, a flow channel is formed inside the valve body, and an annular boss is provided on the inner wall of the flow channel; the sealing ring is arranged in the flow channel, and one side abuts against the annular boss; the valve core assembly is arranged in the flow channel, and comprises an elastic part, a sealing part and a fixed seat, and is detachably connected to the valve body through the fixed seat; the fixed seat abuts against the side of the sealing ring away from the annular boss, and presses the sealing ring against the annular boss; the elastic part is connected to the sealing part, and is used to provide an elastic force to make the sealing part close to the sealing ring.

[0006] The one-way valve according to the first embodiment of the utility model has at least the following beneficial effects:

[0007] When the closure is in place, the closure is in place and the closure is in place, so the closure is in place and the closure is in place when the valve is in a state of being pushed and pulled back into place, whereupon the closure is pressed against the valve body and the closure is pressed back into place.

[0008] According to the one-way valve of some embodiments of the first aspect of the utility model, the valve core assembly includes an adjusting member, which is connected to the elastic member and the fixing seat and is used to adjust the deformation amount of the elastic member.

[0009] According to the one-way valve of some embodiments of the first aspect of the utility model, the elastic member is a compression spring, the adjusting member is an adjusting bolt, the adjusting bolt is threadedly connected to the side of the fixed seat away from the annular boss, and is coaxially arranged with the compression spring, and the two ends of the compression spring are respectively connected to the adjusting bolt and the sealing member.

[0010] According to the one-way valve of some embodiments of the first aspect of the utility model, a first positioning groove is provided on the side of the sealing member facing away from the annular boss, a second positioning groove is provided on the side of the adjusting bolt facing the annular boss, and both ends of the compression spring are respectively installed in the first positioning groove and the second positioning groove.

[0011] According to the one-way valve of some embodiments of the first aspect of the utility model, the fixed seat includes a fixing portion and a clamping portion, the peripheral side surface of the fixing portion is provided with an external thread for connecting with the valve body, the clamping portion is arranged at one end of the fixing portion facing the annular boss and abuts against the sealing ring.

[0012] According to the one-way valve of some embodiments of the first aspect of the utility model, a guide hole is provided on the side of the clamping portion facing the annular boss, the elastic member and the blocking member are installed in the guide hole, and the diameter of the blocking member is smaller than the inner diameter of the guide hole.

[0013] According to the one-way valve of some embodiments of the first aspect of the utility model, the fixing seat is provided with a hollow groove penetrating through the fixing part and the pressing part, and the hollow groove is connected to the guide hole.

[0014] According to the one-way valve of some embodiments of the first aspect of the utility model, the one-way valve includes a filter element, which is arranged in the flow channel and located on the side of the annular boss away from the sealing ring.

[0015] According to the one-way valve of some embodiments of the first aspect of the utility model, the one-way valve includes a clamping piece, the inner wall of the flow channel is provided with a clamping groove, the clamping piece is clamped in the clamping groove, and the two sides of the filter element are respectively abutted against the annular boss and the clamping piece.

[0016] According to some embodiments of the second aspect of the utility model, the metering pump includes the one-way valve of the embodiment of the first aspect.

[0017] The metering pump according to some embodiments of the second aspect of the utility model has at least the following beneficial effects:

[0018] The use of the one-way valve of the first embodiment is helpful to improve the convenience of maintaining the metering pump.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0021] Figure 1 This is a schematic structural diagram of a one-way valve according to an embodiment of the utility model;

[0022] Figure 2 for Figure 1 The exploded structural diagram of the one-way valve shown;

[0023] Figure 3 for Figure 1 A cross-sectional view of a one-way valve is shown.

[0024] Reference numerals:

[0025] Valve body 100; flow channel 110; liquid inlet end 111; liquid outlet end 112; annular boss 113; flow hole 114; clamping groove 115; sealing ring 200; fixing seat 300; fixing part 310; pressing part 320; guide hole 321; hollow groove 330; elastic member 400; blocking member 500; first positioning groove 510; adjusting member 600; second positioning groove 610; filter member 700; clamping member 800; valve core assembly 900. DETAILED DESCRIPTION

[0026] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0027] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, left, right, front, back, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0028] In the description of the utility model, if there is a description of first and second, it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0029] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0030] The following is the attached Figure 1 To Attachment Figure 3 , describing the one-way valve of the first embodiment of the utility model.

[0031] Reference Figures 1 to 3 According to some embodiments of the present invention, the one-way valve includes a valve body 100, a sealing ring 200 and a valve core assembly 900; wherein the valve body 100 is hollow inside and forms a flow channel 110, the flow channel 110 has a liquid inlet end 111 and a liquid outlet end 112, and the fluid can flow into the valve body 100 through the liquid inlet end 111 and can flow out of the valve body 100 from the liquid outlet end 112; in order to facilitate the fixing of the sealing ring 200 inside the flow channel 110, the inner part of the flow channel 110 is The wall is provided with an annular boss 113, which is located between the liquid inlet end 111 and the liquid outlet end 112, and a flow hole 114 is formed in the middle of the annular boss 113 to allow fluid to pass through. For the convenience of description below, according to the flow direction of the fluid, the side of the annular boss 113 facing the liquid inlet end 111 is called the water inlet side of the annular boss 113, and the side of the annular boss 113 facing the liquid outlet end 112 is called the water outlet side of the annular boss 113.

[0032] The valve core assembly 900 is arranged in the flow channel 110, and is used to achieve one-way closure of the flow channel 110, that is, allowing the fluid to flow from the liquid inlet end 111 to the liquid outlet end 112, and restricting the fluid from the liquid outlet end 112 to flow to the liquid inlet end 111; specifically, the valve core assembly 900 includes a fixed seat 300, an elastic member 400 and a blocking member 500, wherein the blocking member 500 is connected to the fixed seat 300 through the elastic member 400, and the fixed seat 300 is detachably connected to the valve body 100, that is, the entire valve core assembly 900 is detachably connected to the valve body 100 through the fixed seat 300, so that the entire valve core assembly 900 can be removed from the flow channel 110 by releasing the connection between the fixed seat 300 and the valve body 100.

[0033] The sealing ring 200 is also arranged in the valve body 100, and is used to cooperate with the sealing member 500 and the elastic member 400 to realize the one-way closure of the flow channel 110. Specifically, the sealing ring 200 is arranged between the fixed seat 300 and the water outlet side of the annular boss 113, and the two sides of the sealing ring 200 are respectively abutted against the fixed seat 300 and the annular boss 113, that is, the sealing ring 200 is pressed and fixed on the water outlet side of the annular boss 113 by the fixed seat 300; at the same time, the sealing member 500 abuts against the sealing ring 200 under the elastic force of the elastic member 400, and blocks the flow hole. 114, so that when the fluid pressure at the liquid inlet end 111 is greater than the fluid pressure at the liquid outlet end 112, the fluid can push the blocking member 500 to overcome the elastic force of the elastic member 400 to move away from the sealing ring 200 and the flow hole 114, thereby allowing the fluid to flow from the liquid inlet end 111 to the liquid outlet end 112; and when the fluid pressure at the liquid outlet end 112 is greater than the fluid pressure at the liquid outlet end 112, the blocking member 500 can always remain in the position of abutting the sealing ring 200 and blocking the flow hole 114, thereby preventing the fluid from flowing back from the liquid outlet end 112 to the liquid outlet end 112.

[0034] It should be understood that since the two sides of the sealing ring 200 are respectively abutted against the annular boss 113 and the fixing seat 300, the sealing ring 200 can be stably fixed in the valve body 100, so that even if the sealing member 500 frequently abuts against the sealing ring 200 under the action of the fluid, the sealing ring 200 will not deviate from its installation position, thereby improving the one-way sealing performance of the one-way valve. At the same time, since the valve core assembly 900 is detachably connected to the valve body 100 through the fixing seat 300, when the sealing ring 200 needs to be replaced after being worn, it is only necessary to release the connection between the fixing seat 300 and the valve body 100, and the entire valve core assembly 900 and the sealing ring 200 can be removed from the flow channel 110, which also facilitates the maintenance and replacement of the sealing ring 200.

[0035] It is understood that in some of these embodiments, reference Figure 2 and Figure 3 , the valve core assembly 900 includes an adjusting member 600, which connects the elastic member 400 and the fixing seat 300 and is used to adjust the deformation of the elastic member 400; it should be understood that since the sealing ring 200 will become thinner due to wear during use, as the thickness of the sealing ring 200 decreases, the elastic force that the elastic member 400 can provide to the blocking member 500 will become smaller, which will in turn affect the tightness of the fit between the sealing ring 200 and the blocking member 500. By setting the adjusting member 600, after the sealing ring 200 becomes thinner, the deformation of the elastic member 400 can be increased by adjusting the adjusting member 600, so that the elastic force of the elastic member 400 can be compensated and restored to a suitable value, so that the blocking member 500 can fit tightly against the sealing ring 200.

[0036] It is understandable that in order to facilitate the adjustment of the deformation amount of the elastic member 400, in some embodiments, reference is made to Figure 2 and Figure 3 The adjusting member 600 is an adjusting bolt, the elastic member 400 is a compression spring, the adjusting bolt is threadedly connected to the side of the fixing seat 300 away from the annular boss 113, and is coaxially arranged with the compression spring, and the two ends of the compression spring are respectively connected to the adjusting bolt and the sealing member 500, so that the compression amount of the compression spring can be adjusted by adjusting the length of the adjusting bolt screwed into the fixing seat 300.

[0037] In some of these embodiments, reference Figure 3 A first positioning groove 510 is provided on the side of the sealing member 500 facing away from the annular boss 113, and a second positioning groove 610 is provided on the side of the adjusting bolt facing the annular boss 113, and both ends of the compression spring are respectively installed in the first positioning groove 510 and the second positioning groove 610; it can be understood that by providing the first positioning groove 510 and the second positioning groove 610, not only can the connection between the adjusting bolt and the sealing member 500 and the compression spring be facilitated, but also the mutual positioning among the compression spring, the adjusting bolt and the sealing member 500 can be achieved, thereby avoiding radial sliding between the compression spring and the adjusting bolt, and between the compression spring and the sealing member 500.

[0038] It is understandable that in order to achieve a detachable connection between the fixing seat 300 and the valve body 100, in some embodiments, referring to Figure 2 and Figure 3 The fixing seat 300 includes a fixing portion 310, wherein an external thread is provided on the peripheral side surface of the fixing portion 310, and an internal thread is correspondingly provided on the inner wall of the flow channel 110, so that the fixing seat 300 can be threadedly connected to the valve body 100 through the fixing portion 310, and the connection between the fixing seat 300 and the valve body 100 can be released by rotating the fixing seat 300; at the same time, the fixing seat 300 also includes a clamping portion 320, which is arranged on the side of the fixing portion 310 facing the annular boss 113, so that when the fixing seat 300 is tightened, the clamping portion 320 can be close to the sealing ring 200, and then abut against the sealing ring 200 and clamp the sealing ring 200 on the annular boss 113.

[0039] It is understandable that, based on some of the above embodiments, in order to prevent the pressing part 320 from affecting the movement of the blocking member 500, in some of the embodiments, a guide hole 321 is provided on the side of the pressing part 320 facing the annular boss 113, wherein the elastic member 400 and the blocking member 500 are both provided in the guide hole 321, and a gap is formed between the peripheral side of the blocking member 500 and the inner wall of the guide hole 321, so that the guide hole 321 can not only guide the movement of the blocking member 500, but also enable the blocking member 500 to move smoothly in the guide hole 321. For example, in one of the embodiments, referring to Figure 2 and Figure 3 The blocking member 500 is spherical, the guide hole 321 is a round hole, and the diameter of the blocking member 500 is smaller than the aperture of the guide hole 321, wherein the adjusting bolt is connected to the center of the fixing portion 310, and the elastic member 400 is coaxially installed in the guide hole 321, so that the center of the blocking member 500 is located on the central axis of the guide hole 321, thereby forming an annular gap between the blocking member 500 and the inner wall of the guide hole 321, thereby avoiding contact and friction between the blocking member 500 and the inner wall of the guide hole 321 when the blocking member 500 approaches or moves away from the sealing ring 200, so as to improve the smoothness of the movement of the blocking member 500.

[0040] It can be understood that, based on some of the above embodiments, in order to prevent the fixing seat 300 from blocking the flow channel 110 and affecting the flow of the fluid in the valve body 100, in some of the embodiments, reference is made to Figure 2 and Figure 3 The fixing seat 300 is provided with a hollow groove 330, which passes through the fixing portion 310 and the pressing portion 320, and is connected to the guide hole 321, so that when the blocking member 500 is pushed away from the sealing ring 200 and the flow hole 114 by the fluid pressure, the fluid flowing through the flow hole 114 can pass through the fixing seat 300 via the guide hole 321 and the hollow groove 330.

[0041] At the same time, in order to increase the flow area of ​​the fixing seat 300 to reduce the damping, in some embodiments, referring to Figure 2 and Figure 3 There are multiple hollow grooves 330, which are evenly distributed around the circumference of the fixing seat 300; at the same time, the hollow grooves 330 are located at the peripheral edge of the fixing seat 300, so that the fixing seat 300 can be tightened or loosened by passing a tool through the hollow grooves 330.

[0042] It should be understood that, in addition to being spherical, the sealing member 500 may also be configured in other shapes such as cylindrical, conical, or cubic columns in some other embodiments, as long as it can cooperate with the sealing ring 200 to achieve one-way sealing, and no specific limitation is made here.

[0043] It is understood that in some of these embodiments, reference Figure 2 and Figure 3 The one-way valve also includes a filter element 700, wherein the filter element 700 is arranged in the flow channel 110 and is located on the side of the annular boss 113 away from the sealing ring 200; it should be understood that when the fluid flowing into the one-way valve contains large particles of solids or other impurities such as dirt, the filter element 700 can effectively filter the impurities, thereby preventing the impurities from entering the position where the sealing ring 200 and the blocking member 500 are located, thereby ensuring that the blocking member 500 and the sealing ring 200 cooperate normally.

[0044] And in order to prevent the filter element 700 from moving in the flow channel 110, in some embodiments, reference is made to Figure 3 The inner wall of the flow channel 110 is provided with a slot 115, and the slot 115 is located on the side of the annular boss 113 away from the valve core assembly 900. The one-way valve also includes a clamping member 800, and the clamping member 800 is clamped in the slot 115. The filter element 700 is arranged between the slot 115 and the annular boss 113, and the two sides of the filter element 700 are respectively abutted against the annular boss 113 and the clamping member 800, that is, the filter element 700 is pressed and fixed on the water inlet side of the annular boss 113 by the clamping member 800, and then the movement of the filter element 700 is limited by the clamping member 800 and the annular boss 113.

[0045] It can be understood that in some embodiments, the filter element 700 is a filter net, and the clamping component 800 is a retaining spring for the hole; of course, according to actual conditions, in some other embodiments, the filter element 700 can also be other filter elements 700 such as filter elements, as long as they can filter fluid impurities, and the clamping component 800 can also be other types of clamping components 800 such as butterfly retaining springs, as long as they can be clamped in the slot 115 and press and fix the filter element 700, and no specific restrictions are made here.

[0046] The following describes a metering pump according to an embodiment of the second aspect of the utility model. The metering pump of this embodiment includes a one-way valve according to the above-mentioned first aspect embodiment. It should be understood that by adopting the one-way valve according to the above-mentioned first aspect embodiment, the convenience of maintaining the metering pump is improved.

[0047] It can be understood that, in some of the embodiments, the metering pump includes a pump body, wherein the one-way valve is arranged on the inlet flow path and / or the outlet flow path of the pump body; when the one-way valve is arranged on the inlet flow path of the pump body, the inlet end 111 of the one-way valve is connected to an external liquid supply device (such as a glue barrel), and the outlet end 112 of the one-way valve is connected to a pump chamber inside the pump body, so as to allow the fluid in the external liquid supply device to enter the pump chamber through the inlet flow path when the metering pump is working; and when the one-way valve is arranged on the outlet flow path of the pump body, the inlet end 111 of the one-way valve is connected to the pump chamber inside the pump body, and the outlet end 112 of the one-way valve is connected to an external liquid-using device (such as a dispensing valve), so as to allow the fluid in the pump chamber to enter the external liquid-using device through the outlet flow path when the metering pump is working.

[0048] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A one-way valve, characterized in that: include: A valve body, wherein a flow channel is formed inside, and an annular boss is provided on the inner wall of the flow channel; A sealing ring, disposed in the flow channel, with one side abutting against the annular boss; The valve core assembly is arranged in the flow channel and includes an elastic member, a sealing member and a fixing seat, and is detachably connected to the valve body through the fixing seat; the fixing seat abuts against the side of the sealing ring away from the annular boss, and presses the sealing ring against the annular boss; the elastic member is connected to the sealing member and is used to provide an elastic force to make the sealing member close to the sealing ring.

2. A one-way valve according to claim 1, characterized in that: The valve core assembly includes an adjusting member, which is connected to the elastic member and the fixing seat and is used to adjust the deformation amount of the elastic member.

3. A one-way valve according to claim 2, characterized in that: The elastic member is a compression spring, and the adjusting member is an adjusting bolt. The adjusting bolt is threadedly connected to a side of the fixing seat away from the annular boss and is coaxially arranged with the compression spring. Both ends of the compression spring are respectively connected to the adjusting bolt and the sealing member.

4. A one-way valve according to claim 3, characterized in that: A first positioning groove is arranged on a side of the blocking member away from the annular boss, a second positioning groove is arranged on a side of the adjusting bolt facing the annular boss, and two ends of the compression spring are respectively installed in the first positioning groove and the second positioning groove.

5. A one-way valve according to any one of claims 1 to 4, characterized in that: The fixing seat includes a fixing portion and a clamping portion. The fixing portion is provided with an external thread for threaded connection with the valve body on its circumferential side surface. The clamping portion is provided at one end of the fixing portion facing the annular boss and abuts against the sealing ring.

6. A one-way valve according to claim 5, characterized in that: A guide hole is provided on one side of the pressing portion facing the annular boss, the elastic member and the blocking member are arranged in the guide hole, and a gap is formed between the peripheral side of the blocking member and the inner wall of the guide hole.

7. A one-way valve according to claim 6, characterized in that: The fixing seat is provided with a hollow groove penetrating through the fixing portion and the pressing portion, and the hollow groove is connected to the guide hole.

8. A one-way valve according to any one of claims 1 to 4, characterized in that: The one-way valve includes a filter element, which is arranged in the flow channel and located on a side of the annular boss away from the sealing ring.

9. A one-way valve according to claim 8, characterized in that: The one-way valve includes a clamping member, the inner wall of the flow channel is provided with a clamping groove, the clamping member is clamped in the clamping groove, and two sides of the filter element are respectively in contact with the annular boss and the clamping member.

10. A metering pump, characterized in that: The invention comprises a one-way valve as claimed in any one of claims 1 to 9.

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