Self-operated cut-off valve spool precise positioning structure

Abstract

The utility model belongs to valve core processing technical field, and disclose self -operated cut -off valve core accurate positioning structure, including base, the top fixedly connected with locating seat of base, install hydraulic cylinder on the base, the output of hydraulic cylinder is connected with lifting plate, the top fixedly connected with ejector rod of lifting plate, the top fixedly connected with ejector plate of ejector rod, the both ends of lifting plate are connected with connecting rod, one end of connecting rod is connected with clamping plate, the top of locating seat is connected with clamping plate slidingly, the centre position of locating seat is equipped with locating groove, through the telescopic cooperation connecting rod of hydraulic cylinder converts linear motion into the clamping force of clamping plate, make clamping plate cooperate locating groove on locating seat carry out clamping positioning to valve core, form radial and circumferential positioning system through opposite clamping groove on clamping plate, ensure the position consistency of valve core when processing or assembling, improve the positioning effect to valve core.

Description

Technical Field

[0001] This utility model belongs to the field of valve core processing technology, specifically a precise positioning structure for a self-operated shut-off valve core. Background Technology

[0002] As a key safety device in industrial systems that relies on the energy of the medium itself to automatically shut off valves under abnormal operating conditions, the positioning accuracy of the valve core directly determines the valve's sealing performance, response speed, and service life. If the valve core positioning deviation is too large, it can easily lead to poor fit between the valve core and the valve seat, valve core movement jamming, or even safety accidents such as overpressure and leakage. Therefore, accurate positioning during valve core processing and assembly is the core link in the production of self-operated shut-off valves.

[0003] Meanwhile, a double-hole valve core positioning tooling with announcement number CN219818846U is disclosed. The technical field of valve core positioning includes a base, the base is provided with a receiving cavity for valve core insertion, the base is connected to a positioning device for positioning the valve core, the positioning device includes a first clamping plate slidably connected to the base, and the base is connected to a driving component for driving the first clamping plate to move toward or away from the valve core.

[0004] The aforementioned dual-hole valve core positioning fixture lacks a convenient part removal design during use. After the valve core is positioned and processed or assembled, it needs to be manually removed from the positioning groove with the help of tools. This is not only time-consuming, but also prone to scratches on the valve core surface or displacement of the positioning reference due to collisions during the part removal process, which further affects the subsequent assembly quality.

[0005] Therefore, a self-operated shut-off valve core precise positioning structure is proposed to address the above problems. Utility Model Content

[0006] To address the problems mentioned in the background art, this utility model provides a self-operated shut-off valve core precision positioning structure. It features the advantage of converting linear motion into clamping force by means of hydraulic cylinder extension and retraction in conjunction with connecting rod, ensuring consistent valve core positioning. At the same time, it utilizes ejector rod and ejector plate to eject the valve core after processing and assembly, enabling convenient removal of the part and ultimately improving valve core processing efficiency.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a self-operated shut-off valve core precise positioning structure, including a base, a positioning seat fixedly connected to the top of the base, a hydraulic cylinder mounted on the base, a lifting plate connected to the output end of the hydraulic cylinder, an ejector rod fixedly connected to the top of the lifting plate, an ejector plate fixedly connected to the top of the ejector rod, connecting rods connected to both ends of the lifting plate, a clamping plate connected to one end of the connecting rod, the clamping plate slidably connected to the top of the positioning seat, a positioning groove provided at the center of the positioning seat, a limiting plate fixedly connected to the top of the positioning seat, a limiting rod slidably connected to the limiting plate, a limiting block fixedly connected to one end of the limiting rod, the other end of the limiting rod fixedly connected to the clamping plate, and a return spring sleeved on the outer side of the limiting rod.

[0008] Preferably, the positioning seat has a first groove on both sides that matches the connecting rod, and the bottom of the positioning groove has a second groove that matches the lifting plate.

[0009] Preferably, one end of the connecting rod is hinged to the lifting plate, and the other end of the connecting rod is hinged to the bottom of the clamping plate.

[0010] Preferably, the clamping plates are symmetrically arranged on both sides of the positioning groove of the positioning seat, and the opposite side of the clamping plates is provided with a clamping groove that matches the shape of the outer wall of the valve core.

[0011] Preferably, the bottom of the positioning groove is provided with a through hole that matches the ejector rod, the ejector rod passes through the through hole and is connected to the ejector plate, and the ejector plate is provided at the bottom of the inner cavity of the positioning groove.

[0012] Preferably, guide blocks are fixed on both sides of the clamping plate, and a guide groove matching the guide blocks is provided at the top edge of the positioning seat. The clamping plate is slidably connected in the guide groove through the guide blocks.

[0013] Preferably, the top of the clamping plate is fixedly connected to a protrusion that is connected to the limiting rod, and the two ends of the return spring abut against the protrusion and the limiting plate.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] 1. This utility model converts linear motion into clamping force of the clamping plate through the telescopic connection of the hydraulic cylinder and the connecting rod. This allows the clamping plate to clamp and position the valve core in conjunction with the positioning groove on the positioning seat. At the same time, the radial and circumferential positioning systems are formed by the corresponding clamping grooves on the clamping plate, ensuring the consistency of the valve core's position during processing or assembly and improving the positioning effect of the valve core.

[0016] 2. This utility model, by setting an ejector rod and an ejector plate, after the valve core is processed and assembled, uses a hydraulic cylinder to drive the lifting plate to rise, so that the connecting rod drives the clamping plate to separate, and the ejector rod drives the ejector plate to rise in the positioning groove, so that the ejector plate pushes the valve core out of the positioning groove, so as to facilitate the removal of the processed valve core and improve the processing efficiency of the valve core. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of the base of this utility model;

[0019] Figure 3 This is a schematic diagram of the positioning seat structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the hydraulic cylinder connection structure of this utility model;

[0021] Figure 5 This is a schematic diagram of the clamp connection structure of this utility model.

[0022] In the diagram: 1. Base; 2. Positioning seat; 3. Hydraulic cylinder; 4. Lifting plate; 5. Ejector rod; 6. Ejector plate; 7. Connecting rod; 8. Clamping plate; 9. Positioning groove; 10. Limiting plate; 11. Limiting rod; 12. Limiting block; 13. Return spring; 14. Clamping groove; 15. Guide block; 16. Guide groove; 17. Protrusion. 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] The following describes an embodiment of this utility model based on its overall structure.

[0025] like Figures 1 to 5As shown, this utility model provides a self-operated shut-off valve core precise positioning structure, including a base 1, a positioning seat 2 fixedly connected to the top of the base 1, a hydraulic cylinder 3 installed on the base 1, the cylinder axis being perpendicular to the top surface of the base 1, a lifting plate 4 connected to the output end of the hydraulic cylinder 3, an ejector rod 5 fixedly connected to the top of the lifting plate 4, an ejector plate 6 fixedly connected to the top of the ejector rod 5, connecting rods 7 connected to both ends of the lifting plate 4, a clamping plate 8 connected to one end of the connecting rod 7, the clamping plate 8 being slidably connected to the top of the positioning seat 2, a positioning groove 9 being provided at the center of the positioning seat 2, the shape matching the bottom of the valve core, a limiting plate 10 fixedly connected to the top of the positioning seat 2, a limiting rod 11 slidably connected to the limiting plate 10, a limiting block 12 fixedly connected to one end of the limiting rod 11, and a clamping plate 8 fixedly connected to the other end of the limiting rod 11, a return spring 13 being sleeved on the outer side of the limiting rod 11 to ensure that the clamping plate 8 remains clamped when there is no external force.

[0026] In this embodiment, the positioning seat 2 has a first groove on both sides that matches the connecting rod 7, which accommodates the movement trajectory of the connecting rod 7 and prevents the connecting rod 7 from colliding or rubbing against the positioning seat 2 during the lifting process. The bottom of the positioning groove 9 has a second groove that matches the lifting plate 4, which provides space for the lifting plate 4 to move up and down and ensures that the lifting plate 4 is unobstructed within its maximum stroke range.

[0027] One end of the connecting rod 7 is hinged to the lifting plate 4, and the other end of the connecting rod 7 is hinged to the bottom of the clamping plate 8. The two ends of the lifting plate 4 and the bottom of the clamping plate 8 are machined with ear seats, and hinge holes are opened on the ear seats. The two ends of the connecting rod 7 are respectively hinged to the ear seats at the bottom of the lifting plate 4 and the clamping plate 8 through pins.

[0028] The clamping plates 8 are symmetrically arranged on both sides of the positioning groove 9 of the positioning seat 2. On the opposite side of the clamping plate 8, there is a clamping groove 14 that matches the shape of the outer wall of the valve core. The two clamping plates 8 are symmetrically distributed with the axis of the positioning groove 9 as the axis of symmetry to ensure that the radial force on the valve core is balanced when clamped.

[0029] The bottom of the positioning groove 9 is provided with a through hole that matches the ejector rod 5. The ejector rod 5 passes through the through hole and is connected to the ejector plate 6. The ejector plate 6 is located at the bottom of the inner cavity of the positioning groove 9. In its natural state, the ejector plate 6 is located at the bottom of the inner cavity of the positioning groove 9 and does not affect the valve core from being placed into the positioning groove 9.

[0030] Guide blocks 15 are fixed on both sides of the clamping plate 8. A guide groove 16 matching the guide block 15 is provided at the top edge of the positioning seat 2. The clamping plate 8 is slidably connected in the guide groove 16 through the guide block 15, which restricts the vertical jump and lateral displacement of the clamping plate 8 and ensures that the clamping plate 8 moves only in a straight line in the horizontal direction.

[0031] The top of the clamping plate 8 is fixedly connected to a protrusion 17 connected to the limiting rod 11. The two ends of the return spring 13 abut against the protrusion 17 and the limiting plate 10. When the clamping plate 8 is separated, the clamping plate 8 slides on the limiting plate 10 through the protrusion 17 and the limiting rod 11, so that the return spring 13 is compressed. The rebound force of the return spring 13 can make the clamping plates 8 fit together when the hydraulic cylinder 3 is reset.

[0032] Hydraulic cylinders are existing technology and will not be described in detail here. In addition, this utility model also includes power supply, controller and switch, etc., which are not the main technical points of this patent and will not be described in detail here.

[0033] The working principle and process of the self-operated shut-off valve core precision positioning structure: When processing or assembling the valve core, the valve core is placed in the positioning groove 9 of the positioning seat 2. The output end of the hydraulic cylinder 3 drives the lifting plate 4 to move down, so that the two clamping plates 8 on the positioning seat 2 fit together. At this time, the hydraulic cylinder 3 is in the reset state, and the reset spring 13 is in the relaxed state. The valve core in the positioning groove 9 is clamped and fixed by the clamping groove 14 on the clamping plate 8, forming a radial and circumferential positioning system, which improves the positioning effect of the valve core. After the valve core processing and assembly are completed... Afterwards, the hydraulic cylinder 3 drives the lifting plate 4 to rise, causing the connecting rod 7 to separate the clamping plate 8. At the same time, the ejector rod 5 drives the ejector plate 6 to rise in the positioning groove 9, so that the ejector plate 6 ejects the valve core from the positioning groove 9, making it easier to remove the processed valve core. When the clamping plate 8 separates, the clamping plate 8 slides on the limiting plate 10 through the protrusion 17 and the limiting rod 11, so that the return spring 13 is compressed. The rebound force of the return spring 13 allows the clamping plates 8 to fit together when the hydraulic cylinder 3 resets, so as to repeatedly fix the valve core.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A self-operated shut-off valve core precision positioning structure, including a base (1), characterized in that: A positioning seat (2) is fixedly connected to the top of the base (1). A hydraulic cylinder (3) is installed on the base (1). A lifting plate (4) is connected to the output end of the hydraulic cylinder (3). A push rod (5) is fixedly connected to the top of the lifting plate (4). A push plate (6) is fixedly connected to the top of the push rod (5). A connecting rod (7) is connected to both ends of the lifting plate (4). A clamping plate (8) is connected to one end of the connecting rod (7). The clamping plate (8) is slidably connected to the top of the positioning seat (2). A positioning groove (9) is provided at the center of the positioning seat (2). A limiting plate (10) is fixedly connected to the top of the positioning seat (2). A limiting rod (11) is slidably connected to the limiting plate (10). A limiting block (12) is fixedly connected to one end of the limiting rod (11). The other end of the limiting rod (11) is fixedly connected to the clamping plate (8). A return spring (13) is sleeved on the outside of the limiting rod (11).

2. The self-operated shut-off valve core precise positioning structure according to claim 1, characterized in that: The positioning seat (2) has a first groove on both sides that matches the connecting rod (7), and the bottom of the positioning groove (9) has a second groove that matches the lifting plate (4).

3. The self-operated shut-off valve core precise positioning structure according to claim 2, characterized in that: One end of the connecting rod (7) is hinged to the lifting plate (4), and the other end of the connecting rod (7) is hinged to the bottom of the clamping plate (8).

4. The self-operated shut-off valve core precise positioning structure according to claim 3, characterized in that: The clamping plates (8) are symmetrically arranged on both sides of the positioning groove (9) of the positioning seat (2), and the opposite side of the clamping plates (8) is provided with a clamping groove (14) that matches the shape of the outer wall of the valve core.

5. The self-operated shut-off valve core precise positioning structure according to claim 4, characterized in that: The bottom of the positioning groove (9) is provided with a through hole that matches the ejector rod (5). The ejector rod (5) passes through the through hole and is connected to the ejector plate (6). The ejector plate (6) is located at the bottom of the inner cavity of the positioning groove (9).

6. The self-operated shut-off valve core precise positioning structure according to claim 5, characterized in that: Guide blocks (15) are fixed on both sides of the clamp (8), and a guide groove (16) matching the guide block (15) is provided at the top edge of the positioning seat (2). The clamp (8) is slidably connected in the guide groove (16) through the guide block (15).

7. The self-operated shut-off valve core precise positioning structure according to claim 6, characterized in that: The top of the clamping plate (8) is fixedly connected to a protrusion (17) connected to the limiting rod (11), and the two ends of the reset spring (13) abut against the protrusion (17) and the limiting plate (10).

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