Stop valve with buffer structure

Abstract

The utility model belongs to the field of valves, particularly relates to a stop valve with a buffer structure, and aims to solve the problems that a water hammer effect is easy to generate, a pipeline system is impacted, the service life is influenced and potential safety hazards are possibly caused due to sudden release of fluid pressure at the moment when the existing stop valve is opened. The valve comprises a valve body and a valve cover fixedly arranged at the top of the valve body, and a support is fixedly arranged at the top of the valve cover; the valve rod and the valve element are used for cutting off a fluid channel of the valve body, the valve rod is arranged in the support in a threaded mode, the bottom end of the valve rod extends into the valve body, a buffering mechanism is arranged in the valve element, sudden release of fluid pressure at the moment when the valve is opened is effectively relieved, and impact of the water hammer effect on a pipeline system is reduced; therefore, the service life of the whole pipeline system is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to a stop valve with a buffer structure. Background Technology

[0002] In the field of fluid control, gate valves are a commonly used type of valve and are widely used in various industrial pipeline systems to control the flow and cut off of fluids. However, traditional gate valves are prone to water hammer effect when they are opened due to the sudden release of fluid pressure, which can impact the pipeline system, affect service life, and may cause safety hazards.

[0003] To address the aforementioned issues, while various buffering devices have been proposed and applied to gate valves in the prior art, most are overly complex in structure or operation. Therefore, it is necessary to develop a gate valve with a relatively simple structure and buffering effect to improve the service life of pipeline systems. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies, such as the tendency for sudden release of fluid pressure to cause water hammer, which impacts pipeline systems, affects service life, and may lead to safety hazards. Therefore, this invention proposes a stop valve with a buffer structure.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A stop valve with a buffer structure includes a valve body and a valve cover fixedly disposed on the top of the valve body, wherein a bracket is fixedly disposed on the top of the valve cover.

[0007] A valve stem and a valve core are used to cut off the fluid passage of the valve body. The valve stem is threaded in the bracket and the bottom end of the valve stem extends into the interior of the valve body. The valve cover is fitted on the outer wall of the valve stem and the valve core is located at the bottom end of the valve stem.

[0008] A buffer mechanism is used to buffer the fluid when the valve body is opened. The buffer mechanism is located inside the valve core and includes multiple baffles. The outer wall of the valve core has multiple through holes, and the inside of the valve core has multiple inner cavities. The multiple through holes are respectively connected to one end of the multiple inner cavities. The baffles are slidably disposed inside the inner cavities and cooperate with the through holes.

[0009] In one possible design, a central cavity is formed inside the valve core, and multiple communicating cavities are formed on the inner wall of the central cavity, which are respectively connected to multiple inner cavities. A connecting rod is rotatably arranged inside the central cavity, and multiple connecting brackets are fixedly arranged on the outer wall of the connecting rod, which are respectively located inside the multiple communicating cavities. One end of the connecting bracket is fixedly arranged with a baffle.

[0010] In one possible design, the top end of the connecting rod rotates through to the outside of the valve core, a connecting shaft is fixedly provided at the top end of the connecting rod, a connecting cavity is opened at the bottom end of the valve stem, and the top end of the connecting shaft slides through to the inside of the connecting cavity.

[0011] In one possible design, a spring is fitted on the outer wall of the connecting shaft, and the two ends of the spring are respectively fixed to the outer wall of the connecting shaft and the inner wall of the connecting cavity.

[0012] In one possible design, the buffer mechanism also includes a conical surface fixedly disposed on the top inner wall of the valve core.

[0013] In one possible design, a torsion spring is fitted on the outer wall of the connecting rod, and the two ends of the torsion spring are respectively fixed to the outer wall of the connecting rod and the inner wall of the central cavity.

[0014] In one possible design, a rubber ring is fixedly installed at the bottom of the valve core.

[0015] In this application, during actual use, the handwheel installed on the outer wall of the valve stem is rotated downwards. The valve stem will drive the valve core below to move downwards as well. When the bottom surface of the valve core touches the inner wall below the valve body, it can no longer move downwards. At this point, if the valve stem is rotated further downwards, the downward state of the valve stem will cause one end of the connecting shaft to retract into the connecting cavity. The rotation of the valve stem will drive the connecting rod to rotate through the connecting shaft. The connecting rod will drive the baffle to rotate through the connecting bracket. The baffle will move inside the inner cavity into the through hole, thereby sealing the through hole and cutting off the fluid passage of the valve body. When it is necessary to open, the valve stem is rotated in the opposite direction. When the valve stem rotates upwards, the connecting shaft and the valve stem will be relatively extended, and the connecting shaft will also rotate together. This will drive the baffle to rotate through the connecting bracket, thereby opening the through hole and allowing the fluid to flow out through the through hole first. Then, if the valve stem is rotated further, it will drive the entire valve core to move upwards, completely opening the valve body.

[0016] In this utility model, the shut-off valve with a buffer structure can achieve pressure on the first dispersed fluid through the conical surface and help guide the fluid to be discharged through the through hole on the side.

[0017] In this utility model, the shut-off valve with a buffer structure can achieve the following when the valve body needs to be opened: the fluid can first flow through the through hole to initially release the pressure, and then the entire fluid channel can be opened to allow the fluid to flow.

[0018] In this invention, a buffer mechanism is installed inside the valve core during use to effectively mitigate the sudden release of fluid pressure when the valve is opened, thereby reducing the impact of water hammer on the pipeline system and extending the service life of the overall pipeline system. Attached Figure Description

[0019] Figure 1 This is a schematic cross-sectional view of a stop valve with a buffer structure proposed in this utility model.

[0020] Figure 2 This is a three-dimensional structural diagram of a stop valve buffer mechanism with a buffer structure proposed in this utility model.

[0021] Figure 3 This is an exploded top view of a stop valve buffer mechanism with a buffer structure proposed in this utility model.

[0022] Figure 4 This is an exploded bottom view of the buffer mechanism of a stop valve with a buffer structure proposed in this utility model.

[0023] In the diagram: 1. Valve body; 2. Valve stem; 3. Valve cover; 4. Bracket; 5. Handwheel; 6. Valve core; 7. Connecting shaft; 8. Connecting rod; 9. Connecting frame; 10. Baffle; 11. Through hole; 12. Inner cavity; 13. Connecting cavity; 14. Central cavity; 15. Connecting cavity; 16. Spring; 17. Conical surface. Detailed Implementation

[0024] 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.

[0025] Example 1

[0026] Reference Figure 1 A shut-off valve includes: a valve body 1 and a valve cover 3 fixedly mounted on the top of the valve body 1 by bolts. A bracket 4 is fixedly mounted on the top of the valve cover 3 by bolts. A valve stem 2 and a valve core 6 are used to cut off the fluid passage of the valve body 1. The valve stem 2 is threaded inside the bracket 4, and its top end is threaded through the bracket 4. A handwheel 5 is fixedly fitted on the top of the outer wall of the valve stem 2 to facilitate manual opening by the operator. The bottom end of the valve stem 2 extends into the interior of the valve body 1. The valve cover 3 is fitted on the outer wall of the valve stem 2, and the valve core 6 is located at the bottom end of the valve stem 2.

[0027] Reference Figure 2-3To buffer the fluid when the valve body 1 is opened, a buffering mechanism is provided inside the valve core 6. The buffering mechanism includes multiple baffles 10, multiple through holes 11 are provided on the outer wall of the valve core 6, and multiple inner cavities 12 are provided inside the valve core 6. The multiple through holes 11 are respectively connected to one end of the multiple inner cavities 12. The baffles 10 are slidably disposed inside the inner cavity 12. When the baffles 10 are rotated to the other end of the inner cavity 12, the baffles 10 will cooperate with the through holes 11 to close the through holes 11.

[0028] Furthermore, a central cavity 14 is formed at the center of the valve core 6. Multiple communicating cavities 13 are formed on the inner wall of the central cavity 14, and these communicating cavities 13 are respectively connected to multiple inner cavities 12. A connecting rod 8 is rotatably arranged inside the central cavity 14. Multiple connecting brackets 9 are fixedly arranged on the outer wall of the connecting rod 8, and these connecting brackets 9 are respectively located inside the multiple communicating cavities 13. One end of each connecting bracket 9 is fixedly arranged to a baffle 10, thereby achieving the same movement of multiple baffles 10 by controlling one 8.

[0029] Reference Figure 4 To achieve the transmission connection between the connecting rod 8 and the valve stem 2, the top end of the connecting rod 8 rotates through to the outside of the valve core 6, and a connecting shaft 7 is fixedly installed at the top end of the connecting rod 8. A connecting cavity 15 is opened at the bottom end of the valve stem 2, and the top end of the connecting shaft 7 slides through to the inside of the connecting cavity 15.

[0030] Specifically, by rotating the handwheel 5 installed on the outer wall of the valve stem 2 downwards, the valve stem 2 will drive the valve core 6 below to move downwards as well. When the bottom surface of the valve core 6 touches the inner wall below the valve body 1, it will be unable to move downwards any further. At this time, if the valve stem 2 is rotated downwards, one end of the connecting shaft 7 will retract into the connecting cavity 15. The rotation of the valve stem 2 will drive the connecting rod 8 to rotate through the connecting shaft 7. The connecting rod 8 will drive the baffle 10 to rotate through the connecting bracket 9. The baffle 10 will move into the through hole 11 inside the inner cavity 12, thereby sealing the through hole 11 and cutting off the fluid passage of the valve body 1.

[0031] When it needs to be opened, the valve stem 2 is rotated in the reverse direction. When the valve stem 2 rotates upward, the connecting shaft 7 and the valve stem 2 will be relatively extended, and the connecting shaft 7 will also rotate together. This will drive the baffle 10 to rotate through the connecting bracket 9, thereby opening the through hole 11, allowing the fluid to flow out through the through hole 11 first. Then, if the valve stem 2 is rotated again, the entire valve core 6 will move upward, completely opening the valve body 1. This will alleviate the sudden release of fluid pressure at the moment the valve is opened and reduce the impact of water hammer effect on the valve and pipeline system.

[0032] This application can be used in the field of valves, or in other fields applicable to this application.

[0033] Example 2

[0034] refer to Figure 3-4 An improvement based on Embodiment 1: A stop valve with a buffer structure is applied to the valve field. A spring 16 is sleeved on the outer wall of the connecting shaft 7, and the two ends of the spring 16 are respectively fixed to the outer wall of the connecting shaft 7 and the inner wall of the connecting cavity 15. The spring 16 is used to abut against the positional distance between the valve stem 2 and the connecting shaft 7 to ensure that the two are in a relatively extended state. The torsion spring sleeved on the outer wall of the connecting rod 8 and the two ends fixed to the outer wall of the connecting rod 8 and the inner wall of the central cavity 14 respectively, ensures the stability between the valve core 6 and the connecting rod 8, and helps the connecting rod 8 to reset when the baffle 10 rotates and leaks through the through hole 11.

[0035] In addition, to further enhance the buffering effect, the buffering mechanism also includes a conical surface 17, which is fixedly mounted on the top inner wall of the valve core 6. When fluid impacts the conical surface 17, the fluid flow direction changes, causing it to pass through the baffle 10, which helps to disperse the fluid pressure.

[0036] To enhance the sealing performance between the valve core 6 and the valve body 1, a rubber ring is fixedly installed at the bottom of the valve core 6.

[0037] 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.

[0038] 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 stop valve having a buffer structure, characterized by, include: A valve body (1) and a valve cover (3) fixedly installed on the top of the valve body (1), wherein a bracket (4) is fixedly installed on the top of the valve cover (3); The valve stem (2) and valve core (6) are used to cut off the fluid passage of the valve body (1). The valve stem (2) is threaded in the bracket (4) and the bottom end of the valve stem (2) extends into the interior of the valve body (1). The valve cover (3) is sleeved on the outer wall of the valve stem (2) and the valve core (6) is located at the bottom end of the valve stem (2). A buffer mechanism is used to buffer the fluid when the valve body (1) is opened. The buffer mechanism is set inside the valve core (6). The buffer mechanism includes multiple baffles (10). Multiple through holes (11) are opened on the outer wall of the valve core (6). Multiple inner cavities (12) are opened inside the valve core (6). The multiple through holes (11) are respectively connected to one end of the multiple inner cavities (12). The baffles (10) are slidably set inside the inner cavity (12). The baffles (10) cooperate with the through holes (11).

2. The stop valve having a buffer structure according to claim 1, characterized in that, The valve core (6) has a central cavity (14) at its center. The inner wall of the central cavity (14) has multiple connecting cavities (13), which are connected to multiple inner cavities (12). A connecting rod (8) is rotatably arranged inside the central cavity (14). Multiple connecting brackets (9) are fixedly arranged on the outer wall of the connecting rod (8), and the multiple connecting brackets (9) are located inside the multiple connecting cavities (13). One end of the connecting bracket (9) is fixedly arranged with a baffle (10).

3. The stop valve having a buffer structure according to claim 2, characterized by, The top end of the connecting rod (8) rotates through to the outside of the valve core (6), and a connecting shaft (7) is fixedly provided at the top end of the connecting rod (8). A connecting cavity (15) is opened at the bottom end of the valve stem (2), and the top end of the connecting shaft (7) slides through to the inside of the connecting cavity (15).

4. The stop valve having a buffer structure according to claim 3, characterized in that, A spring (16) is sleeved on the outer wall of the connecting shaft (7), and the two ends of the spring (16) are respectively fixed on the outer wall of the connecting shaft (7) and the inner wall of the connecting cavity (15).

5. The stop valve having a buffer structure according to claim 4, characterized in that, The buffer mechanism also includes a conical surface (17), which is fixedly disposed on the top inner wall of the valve core (6).

6. The shut-off valve with a buffer structure according to claim 5, characterized in that The outer wall of the connecting rod (8) is fitted with a torsion spring, and the two ends of the torsion spring are respectively fixed to the outer wall of the connecting rod (8) and the inner wall of the central cavity (14).

7. The stop valve having a buffer structure according to claim 1, characterized by, A rubber ring is fixedly installed at the bottom of the valve core (6).

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