Short axial-flow check valve

Abstract

A short axial-flow type check valve belongs to the technical field of valves and comprises a valve body, a valve clack, an ejector shaft, a flow guide body, a spring and a guide sleeve. The middle of the flow guide body is fixedly installed on the rear portion of a valve seat of the valve body, the guide sleeve is fixedly installed on the rear portion in the flow guide body, a guide groove of the guide sleeve is located on the front portion, and an outer ring and an inner ring of a guide ring on the tail portion of the valve clack are located on the inner side of the hollow portion of the flow guide body and the outer side end of the guide sleeve respectively in a sliding mode. Each spring is movably sleeved at the outer side end of each ejector shaft, and the ejector shafts and the springs are respectively sleeved in a plurality of guide grooves of the guide sleeve in a sliding manner. Convenience is brought to installation and use, and meanwhile the noise level in the operation process of the valve can be effectively lowered; due to the fact that the streamline fluid channel is arranged, the medium flow resistance coefficient is small, pressure loss of medium conveying is reduced, reset acting force can be provided for the center ejecting shaft and the valve clack through the springs, and the check valve body can reliably convey the medium in a sealed mode.

Description

TECHNICAL FIELD

[0001] The utility model relates to check valve technical field, especially a short type axial flow check valve. BACKGROUND

[0002] Check valve is the valve that the valve clapper is used as the opening and closing piece, and the action is relied on the weight and medium pressure to block the medium backflow, belongs to the automatic valve, also called check valve, one-way valve, reflux valve or isolation valve. Check valve clapper movement mode is generally divided into lift type and swing type.

[0003] The existing swing type, lift type and other check valves have the following shortcomings due to the limitation of structure, (1) in order to facilitate the installation of lift type or swing type valve clapper structure, the length of the valve body is longer, which brings certain inconvenience to actual installation and use. (2) large pressure drop: due to the small valve hole (channel), a certain pressure loss will be generated when the fluid passes, which affects the system efficiency. (2) large flow resistance coefficient: due to the non-streamlined structure between the valve clapper and the valve seat, the flow resistance coefficient is large, the flow is limited, and the valve clapper may generate large noise during opening and closing. (3) unreliable sealing: since the spring driving the top shaft moves only one, (the valve clapper is located at one side of the top shaft, the top shaft and the spring are sleeved in the guide groove in the valve body, the top shaft pushes the valve clapper to move to the medium inflow channel side under the elastic force of the spring, and the inflow channel is closed), so when the spring elastic force is poor or broken, the valve clapper cannot effectively close the medium inflow channel, which will adversely affect the normal work. CONTENT OF THE UTILITY MODEL

[0004] In order to overcome the disadvantages of the existing check valve due to the limitation of structure, the utility model provides a short type axial flow check valve which solves the technical contradiction of guide precision and sealing performance through structural innovation, and meets the needs of modern industry for high efficiency, low consumption and long period stable operation.

[0005] The utility model solves the technical problems by adopting the following technical scheme:

[0006] The short type axial flow check valve comprises a valve body, a valve clapper, a top shaft, a flow guide, a spring and a guide sleeve. The top shaft and the spring are respectively provided with a plurality of ones. The middle part of the flow guide is fixedly installed at the rear part of the valve seat of the valve body. The inner side end of the flow guide is a hollow structure. The front part of the guide sleeve is distributed with a plurality of guide grooves, and the rear part is distributed with a plurality of wire holes. The guide sleeve is fixedly installed at the rear part of the flow guide, and the guide grooves are located at the front part. The outer diameter of the guide sleeve is smaller than the inner diameter of the hollow part of the inner side end of the flow guide. The outer ring and the inner ring of the tail part guide ring of the valve clapper are respectively slidably located at the inner side of the hollow part of the flow guide and the outer side end of the guide sleeve. Each spring is movably sleeved at the outer side end of each top shaft. The plurality of top shafts and springs are respectively slidably sleeved in the plurality of guide grooves of the guide sleeve.

[0007] Further, the front side outer end and the middle part of the valve disc, and the rear inner side end of the valve seat of the valve body are in a circular arc structure.

[0008] Further, the outer ring and the inner ring of the guide ring of the tail part of the valve disc are spaced apart from the outer ends of the guide sleeve.

[0009] Further, when the valve disc is at the front dead point, the front side outer end of the valve disc, the front side inner end of the valve body, and the inner side end of the valve seat of the valve body are in a sealing structure.

[0010] Further, when the valve disc is at the rear dead point, the rear side end of the valve disc and the front side end of the flow guide are in a circular arc transition structure.

[0011] Compared with the prior art, the utility model has the beneficial effects that: the valve body is designed by integral casting, which improves the structural strength and stability of the valve; the connection points are reduced, the leakage risk is lowered, the reliable operation of the valve under harsh working conditions is ensured, and the service life of the valve is prolonged; the valve has two annular flow passages, the valve body can be designed to be relatively short, the design of the inner and outer channels can effectively reduce the noise level during the operation of the valve; the valve can quickly respond to the flow direction change of the fluid and timely close the valve to prevent the backflow of the medium, and the jamming and wear of the valve disc during movement are reduced, which further improves the reliability and durability of the valve; the unique design of the flow guide optimizes the flow path of the fluid, reduces the fluid resistance, and enables the fluid to flow more uniformly and stably when passing through the valve, reduces turbulence and pressure loss, improves the overall operation efficiency of the system, and reduces energy consumption; the spring can provide stable restoring force to ensure that the valve disc can quickly close when the fluid backflows and timely prevent the reverse flow of the medium; the positioning connection of the flow guide and the guide sleeve improves the concentricity of the valve disc and the valve body, ensures the stability of the relative positions of the components during long-term operation, and thus ensures the sealing performance of the axial check valve; the components such as the spring and the guide sleeve are easy to disassemble and replace, and during maintenance, a single component can be repaired or replaced without complex tools and professional skills, which greatly shortens the maintenance time, reduces the maintenance cost, and improves the availability of the equipment. In summary, the utility model has good application prospects. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 is a structure schematic view of the valve disc in an open state.

[0013] Figure 2 is a structure schematic view of the valve disc in a closed state.

[0014] Figure 3 , 4 is a structure schematic view of the guide sleeve of the utility model;

[0015] Figure 5 is the utility model Figure 1 Partial enlarged structure schematic view. Specific embodiments

[0016] Figure 1 、 2 , 3, 4, 5 show, short type axial check valve, including valve body 1, valve 2, top axle 3, flow guide 4, spring 5, annular guide sleeve 6 (the middle part of front and rear ends is open type structure), first inner hexagonal screw 7, second inner hexagonal screw 8;Top axle 3, spring 5 respectively have eight, the middle part of flow guide 4 is fixedly installed in the valve seat middle part rear side of valve body by second inner hexagonal screw 8, the inside end of flow guide 4 is hollow structure 41, and the front side of guide sleeve 6 is spaced equidistant annular distribution eight guide grooves 61, and the rear side is spaced equidistant annular distribution eight silk holes 62;The guide sleeve 6 is installed in the inside rear end, and the guide groove 61 is located in the front side, and eight first inner hexagonal screws 7 are respectively screwed into eight silk holes 62 in the rear end of guide sleeve rear end through eight holes in the rear end of flow guide, and the rear part of guide sleeve 6 and the inner rear middle part of flow guide 4 are installed together;The outer diameter of guide sleeve 6 is less than the inner diameter of the hollow part 41 in the inside end of flow guide;The outer ring 21 of the tail guide ring of valve 2 and the inner ring 22 are respectively located in the hollow part of flow guide 4 and the outside end of guide sleeve 6;Each spring 5 is sleeved on the outside end of each top axle 3, and eight top axles 3 and springs 5 are respectively sleeved in eight guide grooves in the front side of guide sleeve 6.

[0017] Figure 1 、 2 , 3, 4, 5 show, the front side outer end and middle part of hollow annular valve 2, and the rear inside end of valve seat 101 of valve body is arc structure;The distance between the outer ring 21 of valve tail guide ring and the inner ring 22 and the outside upper end and lower end of guide sleeve is spaced apart. When valve 2 is located in front stop point, the front side outer end of valve 2 and the front side inside end of valve body 1 and the inside end of valve seat 101 of valve body are in sealing structure. When valve 2 is located in rear stop point, the rear end of valve 2 and the front end of flow guide 4 are in arc transition structure.

[0018] Figure 1 、 2, 3, 4, 5, the utility model uses before the flange plate of valve body 1 front and back sides end is fixed between medium input pipeline and medium output pipeline respectively, after medium input pipeline inputs medium (such as water) with pressure, medium will push valve clack 2 to overcome the elastic force of spring 5 and move backward (valve clack 2 back side end contacts top axle 3 front side end, and top axle 3 compresses spring and moves backward along guide groove 61), and medium will normally flow into and flow out in the new type. After medium input pipeline stops inputting medium with pressure, the elastic force of spring 5 will push valve clack 2 and move forward, and the front side end of valve clack 2 and valve body 1 and valve seat 101 are in sealed structure, so that the liquid in medium output pipeline cannot flow back into medium input pipeline. Compared with the prior art, the new type has the following advantages. (1) the valve body adopts integral casting design, which greatly improves the structural strength and stability of the valve, reduces the connection points compared with the traditional splicing type valve body, effectively reduces the leakage risk, ensures that the valve can still reliably operate under harsh working conditions, and prolongs the service life of the valve; the valve has two annular flow passages, and the valve body can be designed into a shorter structure, and the design of the inner and outer channels can effectively reduce the noise level during valve operation. (2) the valve clack cooperates with the top axle to guide the movement of the valve clack accurately, making the opening and closing action of the valve clack more smooth and stable, which not only quickly responds to the flow direction change of the fluid and closes the valve in time to prevent the medium from flowing backward, but also reduces the jamming and wear of the valve clack during movement, further improving the reliability and durability of the valve. (3) the unique design of the flow guide optimizes the flow path of the fluid, reduces the fluid resistance, and makes the fluid flow more uniformly and smoothly when passing through the valve, reduces turbulence and pressure loss, improves the overall operating efficiency of the system, reduces energy consumption, and the spring provides stable restoring force to ensure that the valve clack can quickly close when the fluid flows backward and prevent the medium from flowing in the opposite direction. (4) the flow guide is connected and positioned with the valve body by the second inner hexagonal screw, and the guide sleeve is connected and positioned with the flow guide by the stop and the first inner hexagonal screw, and the guide sleeve accurately limits the position of the valve clack and the top axle, and the top axle moves through the spring assembled in the guide sleeve, and the positioning connection of the flow guide and the guide sleeve improves the concentricity of the valve clack and the valve body, ensures the relative position stability of the components during long-term operation, and thus ensures the sealing performance of the axial flow check valve formed by the new type. (5) the components of the valve, such as spring and guide sleeve, are easy to disassemble and replace, and during maintenance, individual components can be repaired or replaced without complex tools and professional skills, greatly shortening the maintenance time, reducing the maintenance cost, and improving the availability of the equipment.

[0019] The basic principle and main features of the present application and the advantages of the present application are shown and described above, and for those skilled in the art, it is obvious that the present application is limited to the details of the above exemplary embodiments, and can be realized in other specific forms without departing from the spirit or basic characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application.

[0020] In addition, it should be understood that, although the present application is described in terms of embodiments, each embodiment does not contain only one independent technical solution, and the description of the specification is only for clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A short shaft axial check valve, comprising a valve body, a valve disc, a top shaft, a flow guide, a spring, a guide sleeve; characterized in that, The top axle, spring has a plurality of, guide body fixedly installed in the valve seat rear part, guide body inside end is hollow structure, guide sleeve front part is distributed a plurality of guide groove, rear part is distributed a plurality of silk hole;The guide sleeve is fixedly installed in the guide body inside rear part, and its guide groove is located in the front part;The outer diameter of the guide sleeve is less than the inside end hollow part of the guide body, and the outer ring and the inner ring of the valve tail guide ring are respectively located in the inside of the hollow part of the guide body and the outside end of the guide sleeve;Each spring is movably sleeved on the outside end of each top axle, and the plurality of top axles and springs are movably sleeved in the plurality of guide grooves of the guide sleeve.

2. The short axial check valve of claim 1, wherein The front side outer end and the middle part of the valve, and the rear inside end of the valve seat of the valve body are circular arc structure.

3. The short axial check valve of claim 1, wherein The outer ring and the inner ring of the valve tail guide ring are spaced apart from the outside end of the guide sleeve.

4. The short axial check valve of claim 1, wherein When the valve is located at the front dead point, the front side outer end of the valve, the front side inside end of the valve and the inside end of the valve seat of the valve body are in sealing structure.

5. The short axial check valve of claim 1, wherein When the valve is located at the rear dead point, the rear side end of the valve and the front side end of the guide body are in circular arc transition structure.

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