High-precision low-flow-resistance stop valve

Abstract

The utility model discloses a high-precision low-flow-resistance stop valve, belongs to the technical field of valves, and provides the following technical scheme for solving the problem that the flow pressure adjusting precision is reduced due to vibration of a valve clack of a traditional stop valve: the valve clack is connected with a valve rod through a plurality of groups of supporting assemblies which are uniformly distributed in the circumferential direction, and an inner rod and an outer rod form an axial telescopic structure; and the turntable is in running fit with the valve rod through the L-shaped connecting ring. An annular communicating groove is formed in the top of the valve clack, an annular connecting groove is formed in the corresponding position of the bottom of the valve clack, the two grooves are communicated through communicating holes in an annular array, and a sealing ring capable of being embedded into the connecting groove is arranged in the corresponding position of the inner wall of the valve cavity. When the valve is opened, fluid can directly penetrate through the valve clack through the communicating hole to reduce impact force, the supporting assembly counteracts lateral acting force of the fluid on the valve clack through the axial bearing structure, and bending deformation of the valve rod is prevented. According to the valve, the fluid control precision and the operation stability are effectively improved while the sealing performance is kept by optimizing the fluid channel shape and the valve clack supporting structure.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to a high-precision, low-flow-resistance shut-off valve. Background Technology

[0002] Traditional shut-off valves are widely used in industrial fluid control, but they have the following technical drawbacks:

[0003] When the valve disc is opened, because the valve disc and valve stem are connected at a single point, it is prone to vibration or displacement when subjected to fluid impact. Over a long period of use, this can affect the precise regulation of flow or pressure.

[0004] To address the aforementioned issues, a high-precision, low-flow-resistance shut-off valve is proposed. By optimizing the valve disc support structure, flow channel design, and sealing method, high efficiency and reliability in fluid control are achieved. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies that affect the precise regulation of flow rate or pressure, and to propose a high-precision, low-flow-resistance shut-off valve.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A high-precision, low-flow-resistance shut-off valve includes a valve body with a valve cavity inside. The inner wall of the connection between the inlet and outlet sections of the valve cavity is set as an arc-shaped wall to reduce eddies when fluid passes through.

[0008] The valve cover is fixedly connected to the top of the valve body;

[0009] The valve stem passes through the valve cover and extends into the valve cavity;

[0010] The valve disc is located inside the valve cavity and is fixedly connected to the bottom end of the valve stem;

[0011] The support assembly includes a connecting ring, a turntable, an inner rod, and an outer rod. The connecting ring is fixedly connected to the bottom of the valve stem. The turntable is rotatably sleeved on the outer wall of the connecting ring. The top end of the inner rod is fixedly connected to the bottom of the turntable. The outer rod is sleeved on the outside of the inner rod and its bottom end is fixedly connected to the top of the valve disc.

[0012] The inner and outer rods of the support assembly form an axial telescopic structure, and multiple sets of the support assembly are used to counteract the lateral force of the fluid on the valve disc and prevent the valve stem from bending and deforming.

[0013] In one possible design, a pressure balancing hole is provided at the bottom of the outer wall of the outer rod to balance the internal and external pressures of the cavity between the inner rod and the outer rod.

[0014] In one possible design, a sealing ring is also included, which is fixedly disposed at the communication point of the valve cavity. The valve disc has an annular communication groove at the top and an annular connecting groove at the bottom. The communication groove and the connecting groove are connected by a plurality of annularly spaced communication holes.

[0015] When the shut-off valve is closed, the sealing ring is embedded in the connecting groove to seal the connecting hole;

[0016] When the shut-off valve is opened, fluid passes through the connecting hole and through the valve disc, reducing the fluid impact force on the valve disc.

[0017] In one possible design, the cross-section of the connecting ring is L-shaped.

[0018] In one possible design, multiple sets of the support components are distributed equidistantly in a ring along the circumference of the valve disc.

[0019] In one possible design, a handwheel is provided on the outer wall of the valve stem.

[0020] In one possible design, both the connecting groove and the linking groove are annular.

[0021] In this application, during actual use, the valve is opened by rotating the handwheel. At this time, the valve disc will rotate upward, and the outer rod at its top will move in the same way. The inner rod will rotate along with the turntable and will retract into the outer rod. Through the connection between the inner and outer rods, when the fluid impacts the valve disc, it can help to resist the lateral force of the valve rod and valve disc, increasing the stability between them and reducing the possibility of reduced precision control due to bending deformation. When the valve is closed, the sealing ring will be located inside the connecting groove to seal the connecting hole. When the valve is open, when the fluid impacts the valve disc, some of the fluid will pass directly through the connecting hole to the valve disc, thereby reducing the impact force on the valve disc and further increasing stability.

[0022] In this utility model, the high-precision low-flow-resistance shut-off valve, through the support member, can effectively counteract the lateral force of the fluid on the valve disc, prevent the valve stem from bending and deforming, and ensure the alignment accuracy between the valve disc and the valve seat.

[0023] In this utility model, the high-precision low-flow-resistance shut-off valve can reduce eddies and resistance when fluid passes through by means of the arc-shaped wall, and the valve disc has a connecting hole to allow some fluid to pass through directly, thereby reducing the pressure area of ​​the valve disc.

[0024] In this invention, by optimizing the support structure and sealing method, the resistance of fluid flow can be reduced and the operational stability can be enhanced, thereby ensuring the control accuracy and effectively solving the technical defects of traditional shut-off valves. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the main structure of the high-precision, low-flow-resistance shut-off valve proposed in this utility model.

[0026] Figure 2 This is a cross-sectional structural diagram of the high-precision, low-flow-resistance shut-off valve proposed in this utility model.

[0027] Figure 3 This utility model Figure 2 Enlarged view of the structure of section A;

[0028] Figure 4 This is a cross-sectional structural diagram of the valve disc of the high-precision, low-flow-resistance shut-off valve proposed in this utility model.

[0029] In the diagram: 1. Valve body; 2. Valve cavity; 3. Valve cover; 4. Valve stem; 5. Connecting ring; 6. Turntable; 7. Inner rod; 8. Outer rod; 9. Pressure balance hole; 10. Valve disc; 11. Communicating groove; 12. Communicating hole; 13. Connecting groove; 14. Sealing ring; 15. Handwheel; 16. Arc-shaped wall. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0031] Example 1

[0032] Reference Figure 1 The gate valve includes: valve body 1, valve cover 3, valve stem 4, valve disc 10, and multiple sets of support components.

[0033] Reference Figure 2-3 A valve chamber 2 is formed inside the valve body 1, which connects the inlet and outlet of the pipeline. The inner wall of the valve chamber 2 is set as an arc-shaped wall 16 below the fluid passage connection to reduce eddies and resistance when the fluid passes through. The valve cover 3 is fixed to the top of the valve body 1 by bolts to form a sealing structure.

[0034] The valve stem 4 passes through the valve cover 3 and extends into the valve cavity 2. A handwheel 15 is fixedly fitted on its outer wall. Rotating the handwheel 15 drives the valve stem 4 to move axially. The valve disc 10 is located in the valve cavity 2 and is connected to the valve stem 4. A connecting ring 5 with an L-shaped cross section is fixedly connected to the bottom of the valve stem 4. A turntable 6 is rotatably fitted on the outer wall of the connecting ring 5, allowing the turntable 6 to rotate freely around the axis of the valve stem 4.

[0035] The support components include an inner rod 7 and an outer rod 8, with the outer rod 8 sleeved around the inner rod 7. The top end of the inner rod 7 is fixed to the bottom of the turntable 6, and the bottom end of the outer rod 8 is fixed to the top of the valve disc 10. Multiple sets of support components are arranged in a ring at equal intervals along the circumference of the valve disc 10. The outer rod 8 can extend and retract axially along the inner rod 7. A pressure balance hole 9 is opened at the bottom of the outer wall of the outer rod 8 to balance the internal and external pressures.

[0036] The valve is opened by rotating the handwheel 15. At this time, the valve disc 10 will rotate upward, and the outer rod 8 at its top will move in the same way. The inner rod 7 will rotate along with the turntable 6, and the inner rod 7 will retract into the outer rod 8. Through the connection between the inner rod 7 and the outer rod 8, when the fluid passes through and impacts the valve disc 10, it can help to resist the lateral force of the valve stem 4 and the valve disc 10, increase the stability between the two, and reduce the possibility of reduced precision control due to bending deformation.

[0037] This application can be used in the field of valves, or in other fields applicable to this application.

[0038] Example 2

[0039] refer to Figure 4 An improvement upon Embodiment 1: A high-precision, low-flow-resistance shut-off valve, applied in the valve field, features an annular connecting groove 11 at the top of the valve disc 10 and an annular connecting groove 13 at the bottom. The connecting groove 11 and the connecting groove 13 are connected by multiple annularly spaced connecting holes 12. An annular sealing ring 14 is fixedly installed at the top of the valve cavity 2's connecting portion. When the valve is closed, the sealing ring 14 is embedded in the connecting groove 13, forming a sealing fit with the connecting hole 12.

[0040] When the valve is closed, the sealing ring 14 will be located inside the connecting groove 13 to seal the connecting hole 12. When the valve is opened, when the fluid impacts the valve disc 10, some of the fluid will pass directly through the connecting hole 12 to the valve disc 10, thereby reducing the impact force on the valve disc 10 and further increasing stability.

[0041] Specifically, when the valve is opened, rotating the handwheel 15 drives the valve stem 4 to rise, causing the valve disc 10 to move upward synchronously. At this time, the outer rod 8 rises with the valve disc 10, the inner rod 7 retracts into the outer rod 8, and the turntable 6 rotates relative to the connecting ring 5. When the fluid passes through the valve chamber 2, some of the fluid passes directly through the connecting hole 12 through the valve disc 10, reducing the pressure on the valve disc 10; the support member, through the axial bearing of the inner rod 7 and the outer rod 8, counteracts the lateral force of the fluid on the valve disc 10, preventing the valve stem 4 from bending and deforming. When the valve is closed, the valve stem 4 drives the valve disc 10 to move downward, the sealing ring 14 is embedded in the connecting groove 13, blocking the connecting hole 12, and achieving a seal.

[0042] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.

[0043] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A high-precision, low-flow-resistance shut-off valve, characterized in that, include: The valve body (1) has a valve cavity (2) inside. The inner wall of the connection between the inlet section and the outlet section of the valve cavity (2) is set as an arc wall (16) to reduce the eddy current when the fluid passes through. The valve cover (3) is fixedly connected to the top of the valve body (1); The valve stem (4) passes through the valve cover (3) and extends into the valve cavity (2); The valve disc (10) is located inside the valve cavity (2) and is fixedly connected to the bottom end of the valve stem (4); The support assembly includes a connecting ring (5), a turntable (6), an inner rod (7), and an outer rod (8). The connecting ring (5) is fixedly connected to the bottom of the valve stem (4). The turntable (6) is rotatably sleeved on the outer wall of the connecting ring (5). The top end of the inner rod (7) is fixedly connected to the bottom of the turntable (6). The outer rod (8) is sleeved on the outside of the inner rod (7) and its bottom end is fixedly connected to the top of the valve disc (10). The inner rod (7) and outer rod (8) of the support assembly form an axial telescopic structure. Multiple sets of the support assembly are used to counteract the lateral force of the fluid on the valve disc (10) and prevent the valve stem (4) from bending and deforming.

2. The high-precision, low-flow-resistance shut-off valve according to claim 1, characterized in that, The outer rod (8) has a pressure balance hole (9) at the bottom of its outer wall to balance the internal and external pressures of the cavity between the inner rod (7) and the outer rod (8).

3. The high-precision, low-flow-resistance shut-off valve according to claim 2, characterized in that, It also includes a sealing ring (14), which is fixedly installed at the communication point of the valve cavity (2). The valve disc (10) has an annular communication groove (11) at the top and an annular connecting groove (13) at the bottom. The communication groove (11) and the connecting groove (13) are connected by a plurality of annularly spaced communication holes (12). When the shut-off valve is closed, the sealing ring (14) is embedded in the connecting groove (13) to seal the connecting hole (12). When the shut-off valve is opened, fluid passes through the connecting hole (12) and through the valve disc (10), reducing the fluid impact force on the valve disc (10).

4. The high-precision, low-flow-resistance shut-off valve according to claim 1, characterized in that, The cross-section of the connecting ring (5) is L-shaped.

5. The high-precision, low-flow-resistance shut-off valve according to claim 1, characterized in that, Multiple sets of the support components are distributed equidistantly in a ring along the circumference of the valve disc (10).

6. The high-precision, low-flow-resistance shut-off valve according to claim 1, characterized in that, A handwheel (15) is provided on the outer wall of the valve stem (4).

7. The high-precision, low-flow-resistance shut-off valve according to claim 3, characterized in that, Both the connecting groove (11) and the connecting groove (13) are annular.

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