Function-variable stop valve

Abstract

The utility model provides a function-variable stop valve which comprises a valve body, a left valve cavity, a right valve cavity, a communication port for communicating the left valve cavity and the right valve cavity are arranged in the valve body, a valve clack capable of moving up and down and matched with the upper side of the communication port in a sealing mode and a blocking piece with an I-shaped section are further arranged in the valve body, and the diameter of the upper end of the blocking piece is equal to that of the communication port. The bottom wall of the valve body is provided with a guide column coaxial with the communication port, the plugging piece is in sliding connection with the guide column and is composed of an upper disc body, a lower disc body and a connecting rod, the lower disc body is provided with a through hole to reduce fluid blocking, and the side face of the upper disc body is provided with a sealing ring and the upper side face is provided with a sealing piece. And a valve rod connected with the valve clack is arranged at a mounting port at the upper end of the valve body. The stop valve is additionally provided with a backflow prevention function on the basis of original functions, the stop valve can be changed into a simple check valve when the valve clack is opened, the backflow prevention structure is simple, the original valve body is slightly changed, the manufacturing cost is low, and the fluid control requirements of multiple industries can be effectively met.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve technical field, concretely relates to a function variable stop valve. BACKGROUND

[0002] In the field of industrial fluid control and numerous pipeline systems, as a key control component, the stop valve plays an important role in precisely cutting off or conducting the fluid medium circulation path, and its performance and structural design are directly related to the operation reliability, stability and cost-effectiveness of the whole system.

[0003] The traditional stop valve structure has been widely used for many years, although it can basically meet the conventional opening and closing control requirements, but with the development of fine and complex in various industries, the demand for diversification and optimization of the structure of the stop valve is increasingly urgent.

[0004] In the prior art, there are many technologies for giving the stop valve a check function.

[0005] For example, a stop valve with check function is disclosed in patent application No. CN202420230187.3. Figure 1 As shown in the reference

[0006] The existing technology mostly needs to make great changes to the valve body, not only the manufacturing cost is high, but also the original integrity of the valve body is damaged, which may cause leakage. SUMMARY

[0007] In view of the problems pointed out in the background art, the utility model provides a function variable stop valve to solve the above technical problems.

[0008] The technical scheme of the utility model is as follows:

[0009] A function variable stop valve, comprising a valve body, a left valve cavity and a right valve cavity are arranged in the valve body, and a communication port for communicating the left valve cavity and the right valve cavity is arranged in the valve body, a valve flap which can move up and down and is in sealing cooperation with the upper side of the communication port is arranged in the valve body, a blocking piece with an I-shaped cross section is further arranged, the blocking piece can move up and down, and the diameter of the upper end of the blocking piece is equal to the diameter of the communication port.

[0010] The utility model is further provided with a guide column coaxial with the communication port on the bottom wall in the valve body, and the blocking piece is in sliding connection with the guide column.

[0011] The utility model is further provided with an upper disc body, a lower disc body and a connecting rod connecting the upper disc body and the lower disc body, the diameter of the upper disc body is equal to the diameter of the communication port, a connecting hole penetrating through the connecting rod and the lower disc body is further arranged, and the guide column is connected in the connecting hole.

[0012] The utility model further provides for, the lower disc body is provided with a plurality of through holes on distribution.

[0013] The utility model further provides for, the upper disc body's side is equipped with the sealing ring.

[0014] The utility model further provides for, when the lower disc body and the bottom wall of valve body meet, the upper disc body is just located in the axial area of the communicating port.

[0015] The utility model further provides for, the upper side of the upper disc body is equipped with the sealing sheet, and the diameter of sealing sheet is equal to the diameter of communicating port.

[0016] The utility model further provides for, the side wall of connecting rod is equipped with the hole communicating inside and outside.

[0017] The utility model further provides for, the upper end of valve body and the mounting port of coaxial communicating port, and the valve rod connected with valve clack is equipped at mounting port.

[0018] Adopt the above technical scheme, the beneficial effects of the utility model are as follows:

[0019] The variable function stop valve provided by the utility model adds the anti-backflow function on the basis of the original stop valve function, and when the valve clack keeps open, the valve can also become a simple check valve for use, allowing fluid to flow left and right, and preventing fluid from flowing right.

[0020] The anti-backflow structure of the application is an I-shaped plugging member, which has simple structure, does not need to modify the original valve body, has low manufacturing cost, and does not damage the original integrity of the valve body. DRAWINGS

[0021] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating labor.

[0022] Figure 1 It is the structural schematic diagram of prior art.

[0023] Figure 2 It is the structural schematic diagram of the valve clack closed state of the utility model.

[0024] Figure 3 It is the structural schematic diagram of the valve clack open state of the utility model.

[0025] Figure 4 It is the structural schematic diagram of the plugging member of the utility model.

[0026] Explanation of reference signs in the drawings: valve body 1, left valve cavity 2, right valve cavity 3, communication port 4, valve flap 5, plugging member 6, guide column 7, upper disc body 61, lower disc body 62, connecting rod 63, connecting hole 64, through hole 65, sealing ring 66, sealing sheet 67, mounting port 8, valve rod 9. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0028] The following references are made Figures 1-4 The present application is described as follows:

[0029] Embodiment: A variable function stop valve, comprising a valve body 1, the valve body 1 is provided with a left valve cavity 2 and a right valve cavity 3 and a communication port 4 for communicating the left valve cavity 2 and the right valve cavity 3, the left valve cavity 2 and the right valve cavity 3 are connected to each other through the communication port 4 to provide a path for the flow of fluid.

[0030] The valve body 1 is provided with a valve flap 5 which can move up and down and is in sealing cooperation with the upper side of the communication port 4, the key role of the valve flap 5 is to form sealing cooperation with the upper side of the communication port 4 to accurately control the on-off of fluid.

[0031] It also comprises a plugging member 6 with a cross-section in the shape of an I-beam, the plugging member 6 can move up and down, the diameter of the upper end of the plugging member 6 is equal to the diameter of the communication port 4. When the plugging member 6 moves in the valve body to perform different functions, the upper end thereof can accurately cooperate with the communication port 4 to ensure the reliability of the sealing or conduction effect.

[0032] A guide column 7 coaxial with the communication port 4 is arranged on the bottom wall inside the valve body 1, and the plugging member 6 is in sliding connection with the guide column 7.

[0033] The plugging member 6 comprises an upper disc body 61 and a lower disc body 62 and a connecting rod 63 connecting the upper disc body 61 and the lower disc body 62.

[0034] The upper disc body 61 is the part directly interacting with the communication port 4 and the valve flap 5, and the diameter thereof is accurately set to be equal to the diameter of the communication port 4 to ensure the adaptability to the communication port 4 under various working conditions.

[0035] The connecting hole 64 is connected with the guide column 7. The guide column 7 and the sealing element 6 are connected through the connecting hole 64, and the guide column 7 provides accurate guidance for the up-down movement of the sealing element 6. In the complex fluid environment inside the valve, the sealing element 6 can stably and accurately move along the predetermined track with the support and guidance of the guide column 7, whether in response to the action of the valve disc 5 in the normal fluid flow or in the case of fluid backflow.

[0036] Cut-off state:

[0037] When the valve disc 5 is in the initial state of closing the communication port 4, the upper disc body 61 is in close contact with the lower side of the valve disc 5, and at this time, the upper disc body 61 is just located in the axial area of the communication port 4, and forms a tight sealing structure with the valve disc 5, completely blocking the fluid flow between the left valve cavity 2 and the right valve cavity 3, ensuring that the cut-off valve can accurately cut off the fluid path.

[0038] Forward opening state:

[0039] With the working condition requirement, the valve disc 5 moves upward to open, and under the action of the fluid itself, the sealing element 6 also moves upward. At this time, the upper disc body 61 moves to the upper side of the communication port 4 and still maintains the abutting state with the lower side of the valve disc 5, and the lower disc body 62 moves to the lower side of the communication port 4, so that the communication port 4 is in a completely open state, and the fluid can smoothly flow from the left valve cavity 2 to the right valve cavity 3, the valve is normally conducted, and the flow requirement of the system operation is met.

[0040] Anti-backflow state:

[0041] Once the fluid backflow phenomenon occurs, that is, the fluid tries to flow reversely from the right valve cavity 3 to the left valve cavity 2, the backflow fluid acts on the sealing element 6 and pushes it to move downward. Until the lower disc body 62 is in stable abutment with the bottom wall of the valve body 1, at this time, the upper disc body 61 is accurately returned to the axial area of the communication port 4, and the effective sealing of the communication port 4 is quickly formed by the size matching and close contact of the upper disc body 61 and the communication port 4, and the reverse backflow of the fluid is firmly prevented, providing reliable anti-backflow protection for the entire pipeline system.

[0042] Innovation advantage summary:

[0043] Function expansion:

[0044] The variable function stop valve, on the basis of the original stop valve accurate cutting fluid flow path function, innovatively adds the anti-backflow function, greatly expands the applicable scene of the valve, can meet the complex and changeable fluid control needs of many industries such as chemical industry, water supply and drainage, heating and ventilation, and effectively prevent equipment damage, production interruption and other problems caused by fluid backflow.

[0045] Flexible dual-purpose:

[0046] Especially prominent is that when the valve disc 5 remains in the open state, the valve becomes a simple but efficient check valve. In this working condition, fluid is allowed to flow smoothly from the left valve cavity 2 into the right valve cavity 3, and as soon as the fluid tries to flow in the opposite direction, the valve immediately plays a check role to prevent the fluid from flowing to the right. This flexible dual-purpose function provides more convenience and optimization space for system design and operation.

[0047] Cost and structure optimization:

[0048] From the perspective of manufacturing and structural maintenance, the anti-backflow structure adopted by the present application, the I-shaped blocking piece 6, has great advantages. Compared with the traditional complex check structure modification scheme, it has a simple and intuitive structure, and basically does not need to make large-scale and high-cost modifications to the original valve body 1 during valve production and assembly, which not only greatly reduces the manufacturing cost, but also completely retains the structural stability of the valve body 1 verified by long-term practice, effectively avoids potential problems such as poor sealing and stress concentration caused by structural changes, and ensures the reliability and durability of the valve during long-term use.

[0049] The lower disc body 62 is distributed with a plurality of through holes 65. In the actual operation process of the valve, when the valve disc 5 is opened and the entire valve is in a fluid conducting state, the lower disc body 62 is located just below the communication port 4. At this time, if the lower disc body 62 is a solid structure, the fluid flowing from the left valve cavity 2 to the right valve cavity 3 through the communication port 4 will inevitably be blocked by the large area of the lower disc body 62, which not only causes the flow rate to decrease suddenly, affecting the flow supply efficiency of the entire system, but also may cause local turbulent flow, increasing the impact of the fluid on the internal structure of the valve and reducing the service life of the valve. These carefully distributed through holes 65 effectively solve this problem, which opens up an additional flow path for the fluid, allowing the fluid to bypass the lower disc body 62 more smoothly, minimizing the obstruction to the normal flow of the fluid, and ensuring the stable flow rate and flow required for system operation.

[0050] The side surface of the upper disc body 61 is provided with a sealing ring 66. The sealing ring 66 helps to enhance the sealing ability between the upper disc body 61 and the communication port 4.

[0051] The upper side of the upper disc body 61 is provided with a sealing sheet 67, and the diameter of the sealing sheet 67 is equal to the diameter of the communication port 4. The sealing sheet 67 is arranged to enhance the sealing capacity between the upper disc body 61 and the communication port 4.

[0052] The side wall of the connecting rod 63 is provided with a hole communicating the inside and outside of the connecting rod 63. In the daily operation of the valve, since it is in a fluid environment, when the fluid flows around the closure member 6, part of the fluid may enter the narrow space formed by the connecting rod 63 and the connecting hole 64. Without these pressure relief holes, the fluid pressure or the air pressure that may be mixed will continue to accumulate in the space over time and under varying working conditions. Excessive pressure accumulation may cause the connecting rod 63 to deform under pressure, affecting the normal up and down movement of the closure member 6, and thus damaging the normal working mechanism of the valve.

[0053] The upper end of the valve body 1 is coaxially provided with a mounting port 8 of the communication port 4, and the mounting port 8 is provided with a valve rod 9 connected with the valve disc 5. The valve rod 9 plays a key role in the control system of the valve, and it serves as a transmission link between the external control force and the valve disc 5, and realizes the precise control of the operator on the up and down movement of the valve disc 5. The coaxial design of the mounting port 8 and the communication port 4 ensures that the transmission direction of the force of the valve rod 9 when pushing the valve disc 5 to move is perpendicular to the communication port 4, so that the valve disc 5 can move up and down in the valve body 1 stably and accurately, and accurately realize the sealing and opening operation of the communication port 4.

[0054] The above only describes the preferred embodiments of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A variable-function shut-off valve, comprising a valve body, wherein the valve body has a left valve chamber and a right valve chamber and a connecting port connecting the left valve chamber and the right valve chamber, and the valve body has a valve disc that can move up and down and seals with the upper side of the connecting port, characterized in that: The blocking member is in the shape of an I-section and is movable up and down, and the diameter of the upper end of the blocking member is equal to the diameter of the communication port.

2. A variable function shut-off valve according to claim 1, wherein: The bottom wall of the valve body is provided with a guide column coaxial with the communication port, and the blocking member is in sliding connection with the guide column.

3. A variable function shut-off valve according to claim 2, wherein: The blocking member comprises an upper disc body, a lower disc body and a connecting rod connecting the upper disc body and the lower disc body, the diameter of the upper disc body is equal to the diameter of the communication port, and the blocking member further comprises a connecting hole penetrating through the connecting rod and the lower disc body, and the guide column is connected in the connecting hole.

4. A variable function shut-off valve according to claim 3, wherein: The lower disc body is provided with a plurality of through holes.

5. A variable function shut-off valve according to claim 3, wherein: The side surface of the upper disc body is provided with a sealing ring.

6. A variable function shut-off valve according to claim 3, wherein: When the lower disc body abuts against the bottom wall of the valve body, the upper disc body is just located in the axial area of the communication port.

7. A variable function shut-off valve according to claim 3, wherein: The upper side surface of the upper disc body is provided with a sealing piece, and the diameter of the sealing piece is equal to the diameter of the communication port.

8. A variable function shut-off valve according to claim 3, wherein: The side wall of the connecting rod is provided with a hole communicating the inside and the outside of the connecting rod.

9. A variable function shut-off valve according to claim 3, wherein: The upper end of the valve body is coaxial with the mounting port of the communication port, and the mounting port is provided with a valve rod connected with the valve disc.

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