Ferrule ball valve

Abstract

The utility model belongs to the technical field of valves, and particularly relates to a clamping sleeve ball valve which comprises a valve body, a valve rod, a handle, a valve core, a clamping sleeve assembly and a sealing compensation mechanism, the clamping sleeve assembly fixes a pipeline through a locking nut, a first clamping sleeve and a second clamping sleeve, and the sealing compensation mechanism comprises a main body ring, a spring, a movable ring, a first sealing ring and a second sealing ring. The sealing compensation mechanism is fixed to the valve body through a fixing mechanism composed of an elastic locking rod and a locking groove, a first groove and a second groove in the two sides of a locking block are used for guiding installation and reducing fluid impact respectively, and an oblique cone block on the inner wall of a first clamping sleeve inclines reversely and is opposite to the pulling-out direction of the pipeline; according to the clamping sleeve ball valve, dynamic sealing is achieved through the double-sealing-ring structure driven by the spring, the leakage rate is greatly reduced, the sealing reliability is improved, and the clamping sleeve ball valve is suitable for the fields of petrochemical engineering, nuclear power and the like which have high requirements for sealing and connecting.

Description

TECHNICAL FIELD

[0001] The utility model belongs to valve technical field, specifically a kind of snap-on ball valve. BACKGROUND

[0002] Snap-on ball valve is a common valve type, easy to operate, fast, can adapt to a variety of media, such as gas, liquid etc., in petroleum, chemical, natural gas, water treatment and many other fields have wide application, is one of important control elements in industrial pipeline system.

[0003] The existing snap-on ball valve is mainly composed of the following parts: valve body, valve core, snap-on and other components, it adopts snap-on type connection, realizes the opening and closing of valve by rotating valve core, to control the on-off and flow size of fluid, snap-on ball valve has the advantages of compact structure, small volume, light weight, easy installation etc.

[0004] The existing snap-on ball valve in prior art has the following shortcomings: the existing product adopts rigid sealing structure and cannot adapt to installation error or thermal expansion and contraction displacement of pipeline, so that leakage rate is generally high, it is difficult to meet the high requirement scene of petroleum chemical industry, nuclear power and the like, and anti-loosening performance is weak;Therefore, a snap-on ball valve is proposed for the above problems. INVENTION CONTENTS

[0005] In order to make up for the deficiency of the existing snap-on ball valve, a snap-on ball valve is proposed.

[0006] The technical scheme adopted by the utility model to solve its technical problems is: the utility model discloses a snap-on ball valve, including valve body, the valve body is assembled with valve stem, the valve stem is assembled with handle, the valve core is movably assembled in the valve body through valve seat, the two ends of the valve body are inlet and outlet respectively, the inlet and outlet are provided with snap-on assembly for fixing pipeline, the snap-on assembly includes lock nut, the inner wall of lock nut and the outer wall of inlet and outlet are connected through thread, further including first snap-on and second snap-on, sealing compensation mechanism is arranged between the assembly opposite sides of pipeline and inlet and outlet.

[0007] Preferably, the sealing compensation mechanism includes a main body ring, a spring is fixedly assembled in the inner cavity of the main body ring, one end of the spring is terminated with a movable ring extending out of the main body ring, a first sealing ring is fixedly arranged on the side of the movable ring close to the pipeline, and a second sealing ring is fixedly arranged on the side of the main body ring close to the valve body.

[0008] Preferably, the outer diameter of the first sealing ring is two millimeters larger than the inner diameter of the inlet and outlet.

[0009] Preferably, the sealing compensation mechanism is provided with a fixing mechanism that is fixed to the valve body. The fixing mechanism includes elastic locking rods fixedly arranged in a ring array on the main body ring. A locking block is fixedly arranged at one end of the elastic locking rod near the inner wall of the valve body. A locking groove that cooperates with the locking block is opened on the inner wall of the valve body.

[0010] Preferably, the locking block has a first bevel on the side near the inner wall of the valve body.

[0011] Preferably, the locking block has a second bevel on the side away from the inner wall of the valve body.

[0012] Preferably, the inner wall of the first ferrule is fixedly provided with a plurality of oblique conical blocks in a ring array.

[0013] The beneficial effects of this utility model are:

[0014] 1. The spring-driven double sealing ring structure can compensate for pipeline installation errors and thermal expansion and contraction displacement. Dynamic sealing is achieved through spring pre-compression and elastic deformation, which greatly reduces the leakage rate and improves sealing reliability compared with traditional rigid connection.

[0015] 2. The first ferrule's inclined cone block is designed to be tilted in the opposite direction, forming a dual anti-loosening mechanism of mechanical engagement and friction locking, thereby improving tensile strength. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0017] Figure 1 This is a cross-sectional view of the overall structure of this utility model;

[0018] Figure 2 yes Figure 3 Enlarged view of the structure at point A in the middle;

[0019] Figure 3 This is a cross-sectional view of the first and second card sleeves of this utility model;

[0020] Figure 4 This is a three-dimensional structural view of the entire utility model;

[0021] Legend:

[0022] 1. Valve body; 2. Valve stem; 3. Handle; 4. Valve seat; 5. Valve core; 6. Inlet; 7. Outlet; 8. Pipeline; 9. Compression assembly; 901. Locking nut; 902. First compression ferrule; 903. Second compression ferrule; 10. Sealing compensation mechanism; 101. Main ring; 102. Spring; 103. Moving ring; 104. First sealing ring; 105. Second sealing ring; 11. Fixing mechanism; 111. Elastic locking rod; 112. Locking block; 113. Locking groove; 12. First bevel; 13. Second bevel; 14. Inclined cone block. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0024] Specific implementation examples are given below.

[0025] Please see Figures 1-4The present invention discloses a ferrule ball valve, comprising a valve body 1, a valve stem 2 mounted on the valve body 1, a handle 3 mounted on the valve stem 2, and a valve core 5 movably mounted inside the valve body 1 via a valve seat 4. The two ends of the valve body 1 are an inlet 6 and an outlet 7, respectively. A ferrule assembly 9 for fixing a pipe 8 is provided at both the inlet 6 and the outlet 7. The ferrule assembly 9 includes a locking nut 901, the inner wall of which is threadedly connected to the outer wall of the inlet 6 and the outlet 7. It also includes a first ferrule 902. A sealing compensation mechanism 10 is provided between the assembly surfaces of the pipe 8 and the inlet 6 and outlet 7, and the second ferrule 903. The sealing compensation mechanism 10 includes a main ring 101. A spring 102 is fixedly assembled in the internal cavity of the main ring 101. One end of the spring 102 is connected to a movable ring 103 extending out of the main ring 101. A first sealing ring 104 is fixedly provided on the side of the movable ring 103 near the pipe 8. A second sealing ring 105 is fixedly provided on the side of the main ring 101 near the valve body 1.During operation, regarding the connection and sealing of pipe 8, when installing pipe 8, first insert the pipe into inlet 6 or outlet 7, then tighten the locking nut 901. Since the inner wall of the locking nut 901 is threaded into the outer wall of inlet 6 and outlet 7, as the locking nut 901 rotates, it moves axially along the thread. This movement pushes the first ferrule 902 and the second ferrule 903 axially along the conical surface of the valve body 1. The front ends of the first ferrule 902 and the second ferrule 903 have a special cutting edge design. During axial movement, these cutting edges gradually cut into the outer surface of pipe 8, forming a mechanical engagement, firmly fixing pipe 8 to the valve body and achieving initial sealing. The sealing compensation mechanism 10 plays a dynamic sealing role. The spring 102 has a 5mm pre-compression during initial installation, which generates a certain initial elastic force. During actual use of the valve, pipe 8 may experience thermal expansion and contraction due to temperature changes, leading to radial displacement of pipe 8. Alternatively, installation errors may occur during installation. When these situations occur... Spring 102 will extend and retract according to actual conditions. If the pipe 8 is displaced or has gaps, spring 102 will push the movable ring 103 to ensure that the first sealing ring 104 on the movable ring 103 is always tightly fitted with the pipe 8, and the second sealing ring 105 on the main ring 101 seals with the valve body 1, thereby compensating for gaps caused by pipe displacement or installation errors and ensuring the stability of the sealing effect. The rotation of handle 3 will directly drive the valve stem 2 to rotate. Under the drive of valve stem 2, valve core 5 will rotate 90 degrees. When the through hole of valve core 5 is aligned with the axis of pipe 8, the valve is in the open state, and the medium can flow smoothly from inlet 6, through the inside of valve body 1, and then out from outlet 7. When valve core 5 rotates 90 degrees, the through hole is perpendicular to the axis of pipe, and the valve is in the closed state, cutting off the flow of medium. A limiting structure is provided on valve body 1 to restrict the rotation angle of valve stem 2. In terms of sealing performance, a dual-stage sealing structure is adopted, combining the metal seal of the ferrule and the elastic seal of the sealing compensation mechanism 10, which greatly improves the sealing reliability of the valve.

[0026] Furthermore, the outer diameter of the first sealing ring 104 is two millimeters larger than the inner diameter of the inlet 6 and the outlet 7. During operation, the design of the outer diameter of the first sealing ring 104 being two millimeters larger than the inner diameter of the inlet 6 and the outlet 7 adopts the principle of interference fit. When the sealing compensation mechanism 10 is installed between the valve body 1 and the pipeline 8, the first sealing ring 104 with a larger outer diameter will be compressed. Since its material usually has a certain elasticity, it will produce elastic deformation during the compression process. The first sealing ring 104 can fit tightly against the inner wall of the valve body 1 in the entire circumferential direction, and can maintain a good sealing state.

[0027] Furthermore, the sealing compensation mechanism 10 is provided with a fixing mechanism 11 fixed to the valve body 1. The fixing mechanism 11 includes elastic locking rods 111 fixedly arranged in a ring array on the main body ring 101. A locking block 112 is fixedly provided at the end of the elastic locking rod 111 near the inner wall of the valve body 1. A locking groove 113 that cooperates with the locking block 112 is opened on the inner wall of the valve body 1. During operation, when installing the sealing compensation mechanism 10, the operator inserts the main body ring 101 into the valve body 1. During the insertion process, the elastic locking rods 111 will gradually approach the inner wall of the valve body 1. Since the end of the elastic locking rod 111 near the inner wall of the valve body 1 is provided with a locking block, 112, and the inner wall of the valve body 1 is provided with a locking groove 113 that cooperates with the locking block 112. When the locking block 112 contacts the inner wall of the valve body 1, it will be squeezed by the inner wall. The elastic locking rod 111 is made of spring steel, which has good elasticity and high hardness. When squeezed, the elastic locking rod 111 will undergo elastic deformation, and the locking block 112 will slide along the inner wall of the valve body 1 until it reaches the position of the locking groove 113. When the locking block 112 reaches the locking groove 113, due to the elastic restoring force of the elastic locking rod 111, the locking block 112 will automatically embed into the locking groove 113 to achieve positioning and ensure the stable installation of the sealing compensation mechanism 10 in the valve body 1.

[0028] Furthermore, a first bevel 12 is provided on the side of the locking block 112 near the inner wall of the valve body 1. During operation, when the sealing compensation mechanism 10 is installed, when the elastic locking rod 111 drives the locking block 112 to approach the locking groove 113, the first bevel 12 plays a guiding role, so that when the locking block 112 approaches the locking groove 113, it can contact the edge of the inner wall of the valve body 1 at a suitable angle.

[0029] Furthermore, a second bevel 13 is provided on the side of the locking block 112 away from the inner wall of the valve body 1. During operation, when the valve is working normally, the medium flows in from the inlet 6 of the valve body 1, passes through the internal flow channel of the valve body, and then flows out from the outlet 7. When the fluid flows through the location of the locking block 112, since the second bevel 13 is located on the side of the locking block 112 away from the inner wall of the valve body 1 and close to the flow channel, and its inclination direction is consistent with the fluid direction, from the perspective of fluid dynamics, when the fluid encounters a slope consistent with the flow direction, the fluid can flow more smoothly along the slope, reducing the collision and impact between the fluid and the locking block 112, thereby effectively preventing the locking block 112 from loosening due to fluid impact, and ensuring the stability of the connection between the sealing compensation mechanism 10 and the valve body 1 through the fixing mechanism 11.

[0030] Furthermore, the inner wall of the first ferrule 902 is fixedly provided with a plurality of oblique cone blocks 14 in a ring array. During operation, when the operator tightens the locking nut 901 during installation, the locking nut 901 will push the first ferrule 902 and the second ferrule 903 to move axially along the conical surface of the valve body. The oblique cone blocks 14 evenly distributed in a ring array on the inner wall of the first ferrule 902 will gradually come into close contact with the outer wall of the pipe 8 as the first ferrule 902 moves. When the pipe 8 tends to be pulled out, the oblique cone blocks 14 are inclined in the same direction as the pipe 8 is pulled out. In the opposite direction, the pull-out force of pipe 8 will further increase the contact pressure between the inclined cone block 14 and the outer wall of pipe 8, resulting in a significant increase in the friction between the inclined cone block 14 and the outer wall of pipe 8. The mechanical interlocking effect formed by the inclined cone block 14 embedding into the outer wall of pipe 8 will also be further enhanced, preventing pipe 8 from being pulled out. This dual effect of friction and mechanical interlocking allows pipe 8 to maintain a tight connection with the first clamp 902 when subjected to pull-out force, effectively preventing loosening and reducing the probability of failures such as medium leakage caused by the loosening of pipe 8.

[0031] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A compression fitting ball valve, characterized in that: The valve body (1) is equipped with a valve stem (2) and a handle (3). A valve core (5) is movably assembled inside the valve body (1) via a valve seat (4). The two ends of the valve body (1) are an inlet (6) and an outlet (7), respectively. A ferrule assembly (9) for fixing the pipe (8) is provided at both the inlet (6) and the outlet (7). The ferrule assembly (9) includes a locking nut (901). The inner wall of the locking nut (901) is threadedly connected to the outer wall of the inlet (6) and the outlet (7). The assembly also includes a first ferrule (902) and a second ferrule (903). A sealing compensation mechanism (10) is provided between the opposite surfaces of the pipe (8) and the inlet (6) and the outlet (7).

2. The ferrule ball valve according to claim 1, characterized in that: The sealing compensation mechanism (10) includes a main ring (101), and a spring (102) is fixedly installed in the internal cavity of the main ring (101). One end of the spring (102) is connected to a movable ring (103) extending out of the main ring (101). A first sealing ring (104) is fixedly installed on the side of the movable ring (103) near the pipe (8), and a second sealing ring (105) is fixedly installed on the side of the main ring (101) near the valve body (1).

3. A ferrule ball valve according to claim 2, characterized in that: The outer diameter of the first sealing ring (104) is two millimeters larger than the inner diameter of the inlet (6) and outlet (7).

4. A ferrule ball valve according to claim 1, characterized in that: The sealing compensation mechanism (10) is provided with a fixing mechanism (11) that is fixed to the valve body (1). The fixing mechanism (11) includes elastic locking rods (111) fixedly arranged in a ring array on the main body ring (101). A locking block (112) is fixedly arranged at one end of the elastic locking rod (111) near the inner wall of the valve body (1). A locking groove (113) that cooperates with the locking block (112) is opened on the inner wall of the valve body (1).

5. A ferrule ball valve according to claim 4, characterized in that: The locking block (112) has a first bevel (12) on the side near the inner wall of the valve body (1).

6. A ferrule ball valve according to claim 4 or 5, characterized in that: The locking block (112) has a second bevel (13) on the side away from the inner wall of the valve body (1).

7. A compression fitting ball valve according to claim 1, characterized in that: The inner wall of the first ferrule (902) is fixedly provided with several oblique cone blocks (14) in a ring array.

Images