Check valve
By designing a check valve with hard sealing of valve plate and valve seat, the problem that the check valve in the prior art is difficult to effectively prevent the medium from flowing backflow, the effect of the medium flowing only in one direction is achieved, the chamber pressure is stabilized, and the function of automatic closing is provided to ensure the safety of the ship system.
Patent Information
- Application Number
- CN202421462626.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-25
- Publication Date
- 2025-03-21
- Estimated Expiration
- 2034-06-25
AI Technical Summary
Existing check valves are difficult to effectively prevent the medium from flowing back in ships, causing the chamber pressure to change too quickly, which may cause harm to the ship system.
A check valve is designed, using valve plates and valve seats to form a hard seal, and the valve plates and positioning rods are nested to achieve sliding and no resistance through appropriate processes. It has the characteristics of flexible opening and closing, convenient operation, safety and reliability.
It realizes that the medium is allowed to flow in only one direction, prevents reverse flow, stabilizes the chamber pressure, and automatically closes when the pressure in the chamber is too large and the liquid level is too low, prevents the liquid from flowing backwards, and achieves a check-back effect without personnel operation.
Smart Images
Figure CN222650635U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to a valve structure, and in particular to a check valve. Background Art
[0002] The check valve is an important equipment in industry, especially in the field of ships, which can prevent the backflow of media. The utility model is designed according to the working environment of ships, mainly for the backflow problem in the pipeline during ship operation. Once a backflow accident occurs, it is very likely to cause great harm to the environment. Even for large ships, the oil tank volume is large, and the pump speed is too high during the oil supply and reception process, which is easy to cause the pressure in the cabin to change too quickly. If the pressure cannot be stabilized in time, it may even cause certain harm to the ship system. Utility Model Content
[0003] The purpose of the utility model is to provide a check valve, which is different from a general check valve and only allows the medium to flow in one direction and prevents reverse flow, so as to stabilize the pressure in the cabin. At the same time, when the pressure in the cabin is too high or the liquid level is too low, it will automatically close to prevent the liquid in the cabin from flowing back, thus achieving a check effect without the need for human operation.
[0004] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions.
[0005] An embodiment of the present application discloses a check valve, comprising a left shell body and a right shell body, a valve cavity is formed in the middle of the connection between the left shell body and the right shell body, a liquid outlet is formed on the left side of the left shell body, and a liquid inlet is formed on the right side of the right shell body, a valve seat is arranged in the middle of the valve cavity to separate the valve cavity, a plurality of liquid through holes are formed in an annular direction on the surface of the valve seat, a valve sheet is fitted on the left side surface of the valve seat, the valve sheet seals and covers all the liquid through holes, and the left side surface of the valve sheet is abutted against one end of a compression spring.
[0006] Preferably, in the above-mentioned check valve, the valve cavity is recessed at the connection between the left shell and the right shell to form an annular groove, and the valve seat fits in the annular groove.
[0007] Preferably, in the above-mentioned check valve, a plurality of connecting bolts are annularly arranged on the outer sides of the left shell and the right shell.
[0008] Preferably, in the above-mentioned check valve, the other end of the compression spring abuts against the spring seat.
[0009] Preferably, in the above-mentioned check valve, the axial seal of the valve seat is penetrated by a stud, and the two ends of the stud are respectively connected with a left nut and a right nut, the right nut abuts against the right side of the valve seat, the left nut abuts against the left side of the spring seat, the right side of the spring seat abuts against the left end of the bushing, the bushing is sleeved on the stud and its right side abuts against the left side of the valve seat, and the compression spring is sleeved on the outside of the bushing.
[0010] Preferably, in the above-mentioned check valve, the left side surface of the valve seat is protruded with annular serrations on the inner side and the outer side of the liquid through hole respectively.
[0011] Compared with the prior art, the advantage of this technical solution is that a hard seal is formed by the valve plate and the valve seat, the valve plate and the positioning rod are nested and connected, and appropriate technology is used to achieve the effect of sliding without jamming. It has the characteristics of flexible opening and closing, easy operation, safety and reliability. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0013] Figure 1 Shown is a cross-sectional view of a check valve in an embodiment of the present utility model. DETAILED DESCRIPTION
[0014] The following will be combined with the drawings in the embodiments of the utility model to describe the technical solutions in the embodiments of the utility model in detail. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0015] Combination Figure 1 As shown, the check valve 100 includes a left shell body 101 and a right shell body 102, a valve cavity 103 is formed in the middle of the connection between the left shell body 101 and the right shell body 102, a liquid outlet 104 is formed on the left side of the left shell body 101, and a liquid inlet 105 is formed on the right side of the right shell body 102. A valve seat 106 is arranged in the middle of the valve cavity 103 to separate the valve cavity 103, and a plurality of liquid through holes 107 are formed in an annular direction on the surface of the valve seat 106, a valve plate 108 is fitted on the left side surface of the valve seat 106, the valve plate 108 seals and covers all the liquid through holes 107, and the left side surface of the valve plate 108 is abutted against one end of a compression spring 109.
[0016] In this embodiment, the check valve is installed in the pipeline through a flange connection. Under the action of the spring force, the valve plate is sealed on the valve seat, and the valve is in a closed state; when the medium enters from the inlet of the check valve, the medium acts on the valve plate, overcomes the spring force to push the valve plate open and the medium flows; when the medium flows back from the outlet, the medium acts on the reverse side of the valve plate, and together with the restoring force of the spring, the valve plate is sealed on the valve seat, and the valve is closed to prevent the medium from flowing back, thereby completing the check effect.
[0017] Furthermore, the valve cavity 103 is formed with an annular groove 110 at the connection between the left housing 101 and the right housing 102, and the valve seat 106 fits in the annular groove 110. A plurality of connecting bolts 111 are provided on the outer sides of the left housing 101 and the right housing 102 along the annular direction.
[0018] In this embodiment, the insertion is more stable, and sealing members such as gaskets can be provided at the connection to achieve a more airtight seal.
[0019] Furthermore, the other end of the compression spring 109 abuts against the spring seat 112. The axial seal of the valve seat 106 is penetrated by a stud 113, and the two ends of the stud 113 are respectively connected with a left nut 114 and a right nut 115, the right nut 115 abuts against the right side of the valve seat 106, the left nut 114 abuts against the left side of the spring seat 112, the right side of the spring seat 112 abuts against the left end of the bushing 116, the bushing 116 is sleeved on the stud 113 and its right side abuts against the left side of the valve seat 106, and the compression spring 109 is sleeved on the outside of the bushing 116.
[0020] In this embodiment, the internal structure as a whole applies force to the valve seat, and the valve seat is fixed inside the valve cavity, so the overall structure is stable and reliable.
[0021] Furthermore, the left side surface of the valve seat 106 is protruded with annular serrations 117 on the inner side and the outer side of the liquid through hole 107 respectively.
[0022] In this embodiment, the sealing effect is good, and reverse leakage caused by local unevenness is prevented.
[0023] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.
[0024] The above is only a specific implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.
Claims
1. A check valve, characterized in that: It includes a left shell body and a right shell body, a valve cavity is formed in the middle of the connection between the left shell body and the right shell body, a liquid outlet is formed on the left side of the left shell body, and a liquid inlet is formed on the right side of the right shell body, a valve seat is arranged in the middle of the valve cavity to separate the valve cavity, a plurality of liquid through holes are formed in an annular direction on the surface of the valve seat, a valve sheet is fitted on the left side surface of the valve seat, the valve sheet seals and covers all the liquid through holes, and the left side surface of the valve sheet is abutted against one end of a compression spring.
2. The check valve according to claim 1, characterized in that: The valve cavity is concavely provided with an annular groove at the connection between the left shell and the right shell, and the valve seat fits in the annular groove.
3. The check valve according to claim 1, characterized in that: A plurality of connecting bolts are arranged circumferentially on the outer sides of the left shell and the right shell.
4. The check valve according to claim 1, characterized in that: The other end of the compression spring is held against the spring seat.
5. The check valve according to claim 4, characterized in that: The axial seal of the valve seat is penetrated by a stud, and the two ends of the stud are respectively connected with a left nut and a right nut, the right nut is abutted against the right side of the valve seat, the left nut is abutted against the left side of the spring seat, the right side of the spring seat is abutted against the left end of the bushing, the bushing is sleeved on the stud and its right side is abutted against the left side of the valve seat, and the compression spring is sleeved on the outside of the bushing.
6. The check valve according to claim 1, characterized in that: The left side surface of the valve seat is protruded with annular serrations on the inner side and the outer side of the liquid through hole respectively.