Split valve seat quick replacement clamp

Abstract

The utility model discloses a split type valve seat quick replacement clamp, it includes a C shaped frame, the C shaped frame has an opening for accommodating valve body, a drive mechanism is installed on the C shaped frame, a briquetting assembly is connected with the output of drive mechanism, the drive mechanism can drive briquetting assembly moves along the direction perpendicular to C shaped frame opening plane, at least two clamping jaws, symmetrically, slidably set up on the C shaped frame, the inside of clamping jaw is equipped with the snap -fiting part for with valve seat external structure matches, a linkage mechanism connects briquetting assembly and clamping jaw, is used for with briquetting assembly's linear motion conversion is the radial synchronous clamping or loosening movement of clamping jaw. The utility model can realize split type valve seat's quick, laborsaving, accurate and lossless centering accurate and dismounting, effectively improves maintenance efficiency, guarantees the operation safety.

Description

Technical Field

[0001] This utility model relates to the field of valve repair tool technology, and in particular to a special clamp for quickly assembling and disassembling a split valve seat inside a valve cavity. Background Technology

[0002] In industries such as petroleum, chemical, and natural gas, valves are crucial control components in pipeline systems. As the core sealing component of a valve, the valve seat is constantly subjected to erosion, corrosion, and wear from the medium, making it a vulnerable part that requires regular replacement.

[0003] Currently, for split valve seats installed inside the valve cavity, traditional replacement methods typically involve hammering, prying, or simple pulling tools. These methods have several drawbacks: 1. They are labor-intensive and inefficient, often requiring a long time to replace a single valve seat, leading to excessive equipment downtime; 2. They can easily cause impact damage to the delicate valve cavity, the valve seat itself, and its mating components such as the valve cover and bolts; 3. Alignment is difficult to ensure during disassembly and installation, potentially resulting in improper installation of the new valve seat, affecting sealing performance, and even causing premature valve failure; 4. They pose safety hazards, as hammering may generate sparks, which are extremely dangerous in flammable and explosive environments.

[0004] Therefore, there is an urgent need for a specialized tool that can enable quick, safe, and non-destructive disassembly and assembly of split valve seats. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a quick replacement fixture for split valve seats. It can realize the quick, labor-saving, precise and non-destructive disassembly and assembly of split valve seats, effectively improve maintenance efficiency and ensure operational safety.

[0006] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0007] A split-type valve seat quick-change fixture, comprising:

[0008] A C-shaped frame having an opening for accommodating a valve body;

[0009] A drive mechanism is mounted on the C-shaped frame;

[0010] A pressing block assembly is connected to the output end of the drive mechanism, which can drive the pressing block assembly to move in a direction perpendicular to the plane of the C-shaped frame opening.

[0011] At least two grippers are symmetrically and slidably disposed on the C-shaped frame, and the inner side of the grippers is provided with a locking part for matching with the external structure of the valve seat;

[0012] A linkage mechanism connects the pressing block assembly and the gripper, used to convert the linear motion of the pressing block assembly into the radial synchronous clamping or releasing motion of the gripper.

[0013] Furthermore, the linkage mechanism includes:

[0014] A conical sleeve is fixedly connected to the pressure block assembly and moves synchronously with it, the conical sleeve having a conical inclined surface;

[0015] The tail of the gripper is provided with an inclined surface or roller that cooperates with the tapered inclined surface of the tapered sleeve;

[0016] When the pressure block assembly moves downward, the tapered surface of the tapered sleeve pushes the tail of the gripper, causing multiple grippers to synchronously retract radially toward the center to clamp the valve seat; when the pressure block assembly moves upward, the grippers expand radially and loosen under the action of the reset element.

[0017] Furthermore, the C-shaped frame is provided with radial grooves equal in number to the number of grippers, and the grippers are slidably disposed in the radial grooves via sliders.

[0018] Furthermore, the reset element is a compression spring sleeved on the gripper, or a tension spring connected between the gripper and the C-shaped frame.

[0019] Furthermore, the driving mechanism is a manually driven mechanism, comprising:

[0020] A threaded sleeve is fixedly installed at the top center of the C-shaped frame;

[0021] A screw, threadedly engaged with the threaded sleeve, has its lower end rotatably connected to the pressure block assembly;

[0022] A handle is fixedly mounted on the top of the screw.

[0023] Furthermore, the driving mechanism is a hydraulic or pneumatic driving mechanism, including a hydraulic cylinder or air cylinder fixedly mounted on the C-shaped frame, with the lower end of its piston rod connected to the pressure block assembly.

[0024] Furthermore, the pressure block assembly includes a pressure plate, the lower surface of which is provided with positioning protrusions or grooves that match the shape of the valve seat cover.

[0025] Furthermore, the C-shaped frame has a replaceable protective liner on the inside of the opening.

[0026] Furthermore, the C-shaped frame is also provided with guide posts, and the pressing block assembly is provided with guide holes that cooperate with the guide posts to ensure that the pressing block assembly moves in a straight line.

[0027] By adopting the above technical solution, this utility model has the following beneficial effects:

[0028] 1. This utility model achieves the linkage of valve seat clamping and pressing or pulling actions through a drive mechanism, manual or hydraulic drive mechanism combined with a linkage mechanism. It is simple to operate, much faster than traditional methods, greatly shortens maintenance time, and is fast and efficient.

[0029] 2. This utility model greatly reduces the labor intensity of operators through mechanical means such as inclined plane force amplification or hydraulic drive, and provides stable and sufficient clamping and pulling force, which is labor-saving and reliable.

[0030] 3. This utility model ensures uniform clamping force and center alignment through symmetrically designed grippers and linkage mechanism. The positioning design of the pressure block assembly ensures that the pressure is vertically downward, avoiding scratches, bumps and other damage to the valve seat, valve cavity sealing surface and other components during disassembly and assembly, enabling precise and non-destructive disassembly and assembly.

[0031] 4. This utility model avoids dangerous operations such as hammering, and is particularly suitable for dangerous working conditions such as flammable and explosive environments, with high safety.

[0032] 5. The C-shaped frame design of this utility model can adapt to valves of various specifications. By replacing the clamps and pressure blocks of different specifications, it can be extended to various types and sizes of split valve seats, which has strong adaptability.

[0033] The above description is merely an overview of the technical solutions of the embodiments of this application. In order to better understand the technical means of the embodiments of this application and to implement them in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the embodiments of this application more obvious and understandable, specific implementation methods of this application are described below. Attached Figure Description

[0034] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present utility model;

[0035] Figure 2 This is a side view of an embodiment of the present utility model;

[0036] Figure 3 This is a schematic diagram of the bottom side structure of an embodiment of the present utility model;

[0037] Figure 4 This is a front structural diagram of an embodiment of the present utility model;

[0038] Figure 5 for Figure 4 Schematic diagram of the cross-sectional structure of section AA;

[0039] Figure 6 This is a partial structural diagram of the gripper and linkage mechanism in an embodiment of the present utility model;

[0040] Among them, 1. C-shaped frame; 11. Opening; 12. Radial groove; 13. Protective liner; 2. Drive mechanism; 21. Threaded sleeve; 22. Screw; 23. Handle; 3. Pressure block assembly; 31. Pressure plate; 32. Positioning protrusion; 4. Gripper; 41. Engaging part; 42. Roller; 43. Return spring; 44. Slider; 5. Linkage mechanism; 51. Conical sleeve; 6. Guide post. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims and drawings of this application are intended to cover non-exclusive inclusion.

[0043] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of the phrase "embodiment" in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0044] Furthermore, the terms "first," "second," etc., in the specification and claims of this application or in the aforementioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.

[0045] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, "connection" or "joining" in mechanical structures can refer to a physical connection, such as a fixed connection, for example, a connection fixed by fasteners, such as a connection fixed by screws, bolts, or other fasteners; a physical connection can also be a detachable connection, such as a snap-fit ​​or interlocking connection; a physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0046] To make the contents of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0047] like Figure 1-6 As shown, in this embodiment, a split-type valve seat quick-change fixture is provided, which mainly includes a C-shaped frame 1, a drive mechanism 2, a pressure block assembly 3, a gripper 4, and a linkage mechanism 5.

[0048] The C-shaped frame 1 is made of high-strength steel, and its opening 11 is designed to be large enough to accommodate common valve bodies. A replaceable protective liner 13 can be installed inside the frame to prevent scratching the valve surface. Three radial grooves 12 are machined into the frame.

[0049] In this embodiment, the drive mechanism 2 is manually operated and includes a threaded sleeve 21 welded to the top of the frame, a screw 22 that mates with the threaded sleeve 21, and a handle 23 fixed to the top of the screw 22. Rotating the handle 23 can drive the screw 22 to rise or fall.

[0050] The pressure block assembly 3 includes a pressure plate 31, which is rotatably connected to the lower end of the screw 22 via a bearing (not shown in the figure). The bottom of the pressure plate 31 has a positioning protrusion 32 for engaging with a hole or groove on the valve seat cover to ensure alignment. The pressure plate 31 also has a guide hole that engages with a guide post 6 fixed to the C-shaped frame 1, ensuring that the pressure plate 31 can only move vertically up and down and will not rotate.

[0051] Three grippers 4 are respectively mounted in three radial grooves 12 of the C-shaped frame 1 via sliders 44, and can slide radially along the grooves. Each gripper 4 has a locking part 41 on its inner front end, which can be designed into a hook shape, rhombus shape, or other shapes according to the valve seat shape to reliably lock the valve seat. A roller 42 is installed at the tail of each gripper 4. A return spring 43 is also fitted onto each gripper 4.

[0052] The core of the linkage mechanism 5 is a conical sleeve 51, which is fixedly connected to the side wall of the pressure plate 31. The inner conical surface of the conical sleeve 51 contacts the roller 42 at the tail of the gripper 4.

[0053] The working process involves disassembling the valve seat:

[0054] 1. Initial state: Rotating handle 23 counterclockwise causes screw 22 and pressure block assembly 3 to move upward, and conical sleeve 51 rises accordingly. Under the elastic force of return spring 43, gripper 4 expands outward along radial groove 12 to the released state.

[0055] 2. Install the clamp: Insert the opening 11 of the C-shaped frame 1 onto the valve, so that the valve seat is located below the center of the clamp. Adjust the position of the clamp so that the jaws 4 are aligned with the valve seat.

[0056] 3. Clamping the valve seat: Rotate the handle 23 clockwise to drive the screw 22 and the pressure block assembly 3 to move downwards. The conical sleeve 51 fixed on the pressure block assembly 3 moves downwards synchronously, and its conical surface presses against the roller 42 at the tail of the gripper 4. Due to the action of the conical surface, this downward force is decomposed into a radial force that pushes the gripper 4 to slide towards the center along the radial groove 12, thereby causing the three grippers 4 to contract synchronously and evenly towards the center, and the engaging part 41 at its front end is firmly engaged in the disassembly groove of the valve seat.

[0057] 4. Pull out the valve seat: Continue to rotate the handle 23. With the clamping jaws 4 firmly holding the valve seat, the lower end face of the pressure plate 31 of the pressure block assembly 3 will abut against the valve body surface or valve cover. At this time, the continued twisting force will eventually be converted into a force that pulls the valve seat upward through the clamping jaws 4, pulling the valve seat out of the valve cavity smoothly and vertically.

[0058] The process of installing a new valve seat is the reverse: the new valve seat is clamped onto the jaw 4, aligned with the valve cavity, and then the handle is rotated in the opposite direction. The pressure block assembly 3 first presses the valve seat into the valve cavity into place, and then continues to rise. The conical sleeve 51 releases the jaw 4, completing the installation.

[0059] This utility model has a compact structure and ingenious design, combining clamping and pressing actions into one, which greatly improves the efficiency and safety of replacing split valve seats.

[0060] 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.

[0061] The above specific embodiments further illustrate the technical problems, technical solutions, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A split-type valve seat quick-change fixture, characterized in that, include: A C-shaped frame (1) having an opening (11) for accommodating a valve body; A drive mechanism (2) is mounted on the C-shaped frame (1); A pressing block assembly (3) is connected to the output end of the driving mechanism (2), which can drive the pressing block assembly (3) to move in a direction perpendicular to the opening plane of the C-shaped frame (1); At least two grippers (4) are symmetrically and slidably disposed on the C-shaped frame (1), and the inner side of the grippers (4) is provided with a locking part (41) for matching with the external structure of the valve seat; A linkage mechanism (5) connects the pressing block assembly (3) and the gripper (4) to convert the linear motion of the pressing block assembly (3) into the radial synchronous clamping or releasing motion of the gripper (4).

2. The split-type valve seat quick-change fixture according to claim 1, characterized in that, The linkage mechanism (5) includes: A conical sleeve (51) is fixedly connected to the pressure block assembly (3) and moves synchronously with it, the conical sleeve (51) having a conical inclined surface; The tail of the gripper (4) is provided with an inclined surface or roller (42) that cooperates with the tapered inclined surface of the tapered sleeve (51); When the pressure block assembly (3) moves downward, the tapered surface of the tapered sleeve (51) pushes the tail of the gripper (4), causing multiple grippers (4) to synchronously retract radially toward the center to clamp the valve seat; when the pressure block assembly (3) moves upward, the gripper (4) expands radially and loosens under the action of the reset element (43).

3. The split-type valve seat quick-change fixture according to claim 2, characterized in that: The C-shaped frame (1) is provided with radial grooves (12) equal in number to the number of grippers (4), and the grippers (4) are slidably disposed in the radial grooves (12) by means of sliders (44).

4. A split-type valve seat quick-change fixture according to claim 2 or 3, characterized in that: The reset element (43) is a compression spring sleeved on the gripper (4) or a tension spring connected between the gripper (4) and the C-shaped frame (1).

5. A split-type valve seat quick-change fixture according to claim 1, characterized in that, The drive mechanism (2) is a manually driven mechanism, comprising: A threaded sleeve (21) is fixedly installed at the top center of the C-shaped frame (1); A screw (22) is threadedly engaged with the threaded sleeve (21), and its lower end is rotatably connected to the pressure block assembly (3); A handle (23) is fixedly mounted on the top of the screw (22).

6. A split-type valve seat quick-change fixture according to claim 1, characterized in that: The drive mechanism (2) is a hydraulic or pneumatic drive mechanism, including a hydraulic cylinder or air cylinder fixedly installed on the C-shaped frame (1), and the lower end of its piston rod is connected to the pressure block assembly (3).

7. A split-type valve seat quick-change fixture according to claim 1, characterized in that: The pressure block assembly (3) includes a pressure plate (31), and the lower surface of the pressure plate (31) is provided with a positioning protrusion (32) or a slot that matches the shape of the valve seat cover.

8. A split-type valve seat quick-change fixture according to claim 1, characterized in that: The C-shaped frame (1) has a replaceable protective liner (13) inside the opening (11).

9. A split-type valve seat quick-change fixture according to claim 1, characterized in that: The C-shaped frame (1) is also provided with a guide post (6), and the pressure block assembly (3) is provided with a guide hole that cooperates with the guide post (6).

Images