One-way self-locking device capable of being replaced under pressure

Abstract

The utility model relates to the field of devices capable of being replaced under pressure, in particular to a one-way self-locking device capable of being replaced under pressure. The one-way self-locking device capable of being replaced under pressure comprises a core rod, a core cap and a core body, the core cap and the core rod are provided with through holes matched with the core rod in shape and structure, the end, close to the core cap, of the core rod is closed, and the outer wall of the core rod abuts against the inner wall of the core cap; the core rod can penetrate through the through holes of the core cap and the core body and move in the axial direction of the one-way self-locking device capable of being replaced under pressure, at least one limiting unit with the preset length is arranged on the side wall of the core body, and the end, away from the core cap, of the core rod can abut against any one of the two ends of the limiting unit in the axial direction of the limiting unit. According to the one-way self-locking device capable of being replaced under pressure, the core rod, the core cap and the core body interact and are matched, the first state and the second state can be achieved only through the pressure difference between the interior and the exterior of the one-way self-locking device capable of being replaced under pressure, compared with a traditional device capable of being replaced under pressure, the structure is simpler, installation is convenient, meanwhile, used materials can be reduced, and the production cost can be saved.

Description

Technical Field

[0001] The present application relates to the field of pressurized replaceable devices, and in particular to a one-way self-locking pressurized replaceable device. Background Art

[0002] The one-way self-locking pressurized replaceable device is usually used in equipment such as valves. It is a core component for controlling the flow of fluids, and plays the role of conduction and cutoff through the movement of the core rod.

[0003] The existing pressurized replaceable device mainly includes a core rod, a core cap, a spring, a core body and a sealing ring. During use, there are mainly the following problems: the spring realizes the limiting effect through the cooperation of the core body and the core rod, but due to the pressure, the spring is often stuck and cannot rebound, resulting in the core rod being unable to reset; the pressurized replaceable device is usually made of metal material with good sealing performance, but the long-term flushing of the fluid in the valve will cause the components to oxidize, and the cost of replacement is high.

[0004] Therefore, there is an urgent need for a one-way self-locking pressure-replaceable device to solve the above problems. Utility Model Content

[0005] The purpose of the present application is to provide a one-way self-locking pressure-replaceable device.

[0006] The embodiments of the present application can be implemented through the following technical solutions:

[0007] A one-way self-locking pressurized replaceable device comprises a core rod, a fixedly connected core cap and a core body, the core cap and the core rod are provided with through holes adapted to the shape and structure of the core rod, one end of the core rod close to the core cap is closed and the outer wall of the core rod abuts against the inner wall of the core cap, the core rod can pass through the through holes of the core cap and the core body and move along the axial direction of the one-way self-locking pressurized replaceable device.

[0008] Furthermore, at least one limiting unit of a preset length is provided on the side wall of the core body, and one end of the core rod away from the core cap can abut against any one of the two ends of the limiting unit along the axial direction thereof.

[0009] Furthermore, a matching unit is provided at one end of the core rod away from the core cap, and the matching unit can move in the limiting unit along the axial direction of the one-way self-locking pressurized replaceable device.

[0010] Furthermore, the matching unit includes two first protrusions of the same structure size and symmetrically arranged, the first protrusions extend into the limiting unit, and the outer wall of the first protrusion can abut against any one of the two ends of the limiting unit along its axial direction.

[0011] Furthermore, one end of the first protrusion facing the core cap is a slope structure, and the slope is arranged toward the outer side of the core rod.

[0012] Furthermore, the limiting unit includes two symmetrically arranged first through holes with the same size and structure, the first through holes have a preset length along the axial direction thereof and the width of the first through holes in the horizontal direction matches the first protrusion and reciprocates in the axial direction.

[0013] Furthermore, the core rod includes a first core rod segment, a second core rod segment and a third core rod segment that are fixedly connected and integrally formed, the first core rod segment is a solid structure with the same diameter, the outer diameter of the second core rod segment gradually increases in the direction away from the core cap and the cross-section of the second core rod segment along its axial direction is an isosceles trapezoid, and the third core rod segment has the same diameter and a cross-section along its axial direction is a rectangle.

[0014] Furthermore, the inner wall of the core is provided with a plurality of third protrusions along its axial direction, the third protrusions comprising two third protrusions protruding inwardly and symmetrically arranged, and the outer wall of the third protrusion abuts against the outer wall of the core rod to achieve position limiting.

[0015] Furthermore, the inner wall of the core cap is provided with a plurality of second protrusions along its axial direction, the second protrusions comprising two second protrusions protruding inwardly and symmetrically arranged, and the second protrusions are limited by abutting against the outer wall of the core rod.

[0016] Furthermore, the core rod, the core cap and the core body are made of plastic material.

[0017] Furthermore, the core cap and the core body are integrally formed.

[0018] The one-way self-locking pressure-replaceable device provided in the embodiment of the present application has at least the following beneficial effects:

[0019] 1. The core rod, core cap and core body in the present application cooperate with each other, and can achieve the first state and the second state only by using the pressure difference between the inside and outside of the one-way self-locking pressurized replaceable device. Compared with the traditional pressurized replaceable device, the structure is simpler, the installation is convenient, and the production materials are saved;

[0020] 2. The core rod, core cap and core body in the present application are made of plastic materials. Compared with the traditional metal materials, while ensuring the sealing effect, the one-way self-locking pressurized replacement device made of plastic materials can effectively save costs;

[0021] 3. The one-way self-locking pressure-replaceable device made of plastic material in the present application is less susceptible to oxidation and has a longer service life than traditional metal materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a cross-sectional view of the first state of the one-way self-locking pressurized replaceable device in this application;

[0023] Figure 2 This is the overall structural diagram of the one-way self-locking pressurized replaceable device in this application;

[0024] Figure 3 A cross-sectional view of the second state of the one-way self-locking pressurized replaceable device in the present application;

[0025] Figure 4 is a cross-sectional view of the core rod in this application;

[0026] Figure 5 It is a top view of the one-way self-locking pressurized replaceable device in this application.

[0027] The numbers in the figure are: 1-core rod, 11-matching unit, 12-first protrusion, 13-first core rod segment, 14-second core rod segment, 15-third core rod segment, 2-core cap, 21-second protrusion, 3-core body, 31-limiting unit, 32-first through hole, 33-third protrusion, 4-sealing ring. DETAILED DESCRIPTION

[0028] Hereinafter, the present application will be further described based on preferred embodiments with reference to the accompanying drawings.

[0029] In addition, various components on the drawings are enlarged (thickened) or reduced (thinned) for ease of understanding, but this practice is not intended to limit the scope of protection of the present application.

[0030] Words importing the singular also include the plural and vice versa.

[0031] In the description of the embodiments of the present application, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the products of the embodiments of the present application are usually placed when in use, it is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, in the description of the present application, in order to distinguish different units, the words first, second, etc. are used in this specification, but these are not limited by the order of manufacture, nor can they be understood as indicating or implying relative importance, and their names may be different in the detailed description and claims of the present application.

[0032] The vocabulary in this specification is used to illustrate the embodiments of the present application, but is not intended to limit the present application. It should also be noted that, unless otherwise clearly specified and limited, the terms "disposed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, an indirect connection through an intermediate medium, or a connection between the two elements. For those skilled in the art, the specific meanings of the above terms in this application can be specifically understood.

[0033] The present application provides a one-way self-locking pressure-replaceable device. Figure 1 and Figure 2 The first state cross-sectional view and the overall structural view of the one-way self-locking pressurized replaceable device in the present application are respectively shown, as shown in FIG. Figure 1 and Figure 2 As shown, a one-way self-locking pressurized replaceable device comprises a core rod 1, a fixedly connected core cap 2 and a core body 3, the core cap 2 and the core rod 1 are provided with a through hole adapted to the shape and structure of the core rod 1, the end of the core rod 1 close to the core cap 2 is closed and the outer wall of the core rod 1 abuts against the inner wall of the core cap 2, the core rod 1 can pass through the through hole of the core cap 2 and the core body 3 and move along the axial direction of the one-way self-locking pressurized replaceable device, at least one limiting unit 31 of a preset length is provided on the side wall of the core body 3, and the end of the core rod 1 away from the core cap 2 can abut against any one of the two ends of the limiting unit 31 along its axial direction through linear motion.

[0034] Furthermore, if Figure 4 As shown, the core rod 1 includes a first core rod segment 13, a second core rod segment 14 and a third core rod segment 15 that are fixedly connected and coaxially integrally formed. The first core rod segment 13 is a solid structure with the same diameter and the end of the first core rod segment 13 away from the core body 3 is closed. When other equipment is connected to the core cap 2, the end of the first core rod segment 13 away from the core body 3 is used as a force point to abut against other equipment; the outer diameter of the second core rod segment 14 gradually increases in the direction away from the core cap 2 and the cross section of the second core rod segment 14 along its axial direction is The surface is an isosceles trapezoid. When the core rod 1 reciprocates along its axial direction, the outer wall of the second core rod segment 14 can abut against the inner wall of the core body 3 to achieve a sealing effect. At the same time, the inner wall of the core body 3 corresponding to the second core rod segment 14 is a slope structure with the same inclination angle as the second core rod segment 14, which effectively increases the contact area between the second core rod segment 14 and the inner wall of the core body 3 to achieve a better sealing effect; the third core rod segment 15 has the same diameter and the cross-section of the third core rod segment 15 along its axial direction is a rectangle.

[0035] Furthermore, a mating unit 11 matching the limiting unit 31 is provided at one end of the core rod 1 away from the core cap 2, and the mating unit 11 is fixedly connected to the end of the third core rod segment 15 and formed as one piece, and the mating unit 11 includes two symmetrically arranged first protrusions 12 with the same structural size, and the first protrusion 12 is a slope structure and the slope of the first protrusion 12 is arranged toward the outside of the core rod 1, and partially extends into the limiting unit 31, and performs a linear motion along its axial direction through the action of force, and abuts against the limiting unit 31.

[0036] Specifically, Figure 1 and Figure 3 As shown, the limiting unit 31 is two first through holes 32 symmetrically arranged and of the same structural size, the first protrusion 12 is slidably matched with the first through hole 32, and the limiting unit 31 has a preset length in the axial direction of the one-way self-locking pressurized replaceable device, and the range of the preset length is that when the core rod 1 moves toward the core cap 2 end, the outer wall of the first protrusion 12 finally abuts against the upper wall of the first through hole 32 and the outer wall of the second core rod segment 14 abuts against the inner wall of the core body 3, thereby achieving a sealing effect; when the core rod 1 moves toward the end away from the core cap 2, the bottom outer wall of the first protrusion 12 finally abuts against the lower wall of the first through hole 32, the first core rod segment 13 abuts against the core cap 2, and the outer wall of the second core rod segment 14 and the outer wall of the third core rod segment 15 form a channel for fluid circulation with the inner wall of the core body 3.

[0037] In some preferred embodiments of the present application, the core cap 2 and the core body 3 are integrally formed.

[0038] In some preferred embodiments of the present application, a cavity matching the second core rod segment 14 and the third core rod segment 15 is formed at one end of the core rod 1 away from the core cap 2. Due to the setting of the cavity, more fluid in the valve can contact the core rod 1, thereby increasing the contact area between the fluid in the valve and the core rod 1, thereby enhancing the force of the core rod 1 toward the core cap 2, and further improving the sealing effect.

[0039] In some preferred embodiments of the present application, the inner wall of the core body 3 is provided with a plurality of third protrusions 33 along its axial direction, and the third protrusions 33 include two third protrusions protruding inwardly, having the same structural size and being symmetrically arranged, and the third protrusions 33 abut against the outer wall of the core rod 1 to play a limiting role, which can effectively prevent the core rod 1 from being skewed due to uneven force to affect the stability of the overall structure.

[0040] In some preferred embodiments of the present application, the third protrusion is an arc structure close to the end of the core rod 1 and has a smooth transition with the third protrusion away from the end of the core rod 1. Therefore, when the core rod 1 reciprocates along its axial direction, the contact area between the core rod 1 and the third protrusion 33 is relatively reduced, which can not only ensure the stability of the core rod 1 during reciprocating motion, but also further reduce the resistance to the fluid.

[0041] In some preferred embodiments of the present application, Figure 5 As shown, the inner wall of the core cap 2 is provided with a plurality of second protrusions 21 along its axial direction, and the second protrusions 21 include two second protrusions protruding inwardly, having the same structural size and being symmetrically arranged, and the second protrusions 21 abut against the outer wall of the first core rod segment 13 to play a role of limiting and fixing, which can further improve the stability of the core rod 1.

[0042] In some preferred embodiments of the present application, the second protrusion is an arc structure close to the end of the core rod 1 and smoothly transitions to the second protrusion away from the end of the core rod 1. Therefore, when the core rod 1 reciprocates along its axial direction, the contact area between the core rod 1 and the second protrusion 21 is relatively reduced, thereby reducing resistance.

[0043] Specifically, Figure 1 As shown, the outer wall of the core body 3 is provided with a threaded structure, through which the one-way self-locking pressurized replaceable device is threadedly connected to the valve. At the same time, a sealing ring 4 is provided at the end of the core body 3 close to the core cap 2, which can further enhance the sealing between the one-way self-locking pressurized replaceable device and the valve, making it more reliable.

[0044] Furthermore, if Figure 1 As shown, the one-way self-locking pressurized replaceable device in the present application realizes the movement of the core rod 1 through the pressure difference. When the end of the core cap 2 is not connected to other equipment, the pressure inside the core body 3 is greater than the pressure outside the end of the core cap 2. The outer wall of the first protrusion 12 abuts against the upper wall of the first through hole 32 to play a sealing role. At the same time, due to the pressure difference, the outer wall of the second core rod segment 14 is squeezed and abutted against the inner wall of the core body 3 to reach the first state. The close fit between the first protrusion 12 and the first through hole 32 plays a sealing role, which can effectively prevent the fluid in the valve from flowing out of the outside of the core cap 2.

[0045] like Figure 3As shown, when the end of the core cap 2 is connected to other equipment, the other equipment will push the core rod 1 to move linearly due to external force until the bottom outer wall of the first protrusion 12 abuts against the lower wall of the first through hole 32, reaching the second state. At this time, the fluid in the valve can flow through the cavity formed by the core body 3 and the core rod 1 to other equipment outside the core cap 2.

[0046] Furthermore, the traditional pressurized replaceable device reaches a closed or open state through the movement of a spring or a piston, while the one-way self-locking pressurized replaceable device in the present application can achieve this effect only through the pressure difference inside and outside the one-way self-locking pressurized replaceable device. At the same time, it has a simple structure and is easy to install.

[0047] Furthermore, the one-way self-locking pressurized replaceable device is made of plastic material. Compared with the traditional pressurized replaceable device made of metal material, the one-way self-locking pressurized replaceable device in the present application has low production cost and is easy to process and manufacture. At the same time, due to the complex fluid composition in the valve, the pressurized replaceable device made of metal material is easily oxidized after long-term contact with the fluid and has a high replacement cost, while the plastic material is not easily oxidized and has a low replacement cost.

[0048] The above is a detailed introduction to the specific implementation methods of the present application. For those skilled in the art, several improvements and modifications may be made to the present application without departing from the principles of the present application. These improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A one-way self-locking pressure-replaceable device, comprising a core rod (1), a fixedly connected core cap (2) and a core body (3), characterized in that: The core cap (2) and the core rod (1) are provided with a through hole that matches the shape and structure of the core rod (1); one end of the core rod (1) close to the core cap (2) is closed and the outer wall of the core rod (1) is in contact with the inner wall of the core cap (2); the core rod (1) can pass through the through hole of the core cap (2) and the core body (3) and move along the axial direction of the one-way self-locking pressurized replaceable device; At least one limiting unit (31) of a preset length is provided on the side wall of the core body (3); an end of the core rod (1) away from the core cap (2) can abut against any one of the two ends of the limiting unit (31) along its axial direction.

2. The one-way self-locking pressure-replaceable device according to claim 1, characterized in that: A matching unit (11) is provided at one end of the core rod (1) away from the core cap (2), and the matching unit (11) can move in the limiting unit (31) along the axial direction of the one-way self-locking pressure-replaceable device.

3. The one-way self-locking pressurized replaceable device according to claim 2 is characterized in that: The matching unit (11) comprises two first protrusions (12) of the same structure and size and symmetrically arranged, the first protrusions (12) extending into the limiting unit (31), and the outer wall of the first protrusion (12) can abut against any one of the two ends of the limiting unit (31) along its axial direction.

4. The one-way self-locking pressurized replaceable device according to claim 3 is characterized in that: One end of the first protrusion (12) facing the core cap (2) is a slope structure, and the slope is arranged toward the outside of the core rod (1).

5. The one-way self-locking pressurized replaceable device according to claim 3 is characterized in that: The limiting unit (31) comprises two first through holes (32) which are symmetrically arranged and have the same size and structure, the first through holes (32) having a preset length along their axial direction and the width of the first through holes (32) in the horizontal direction matching the first protrusion (12) for reciprocating movement in the axial direction.

6. The one-way self-locking pressurized replaceable device according to claim 1, characterized in that: The core rod (1) comprises a first core rod segment (13), a second core rod segment (14) and a third core rod segment (15) which are fixedly connected and integrally formed, the first core rod segment (13) being a solid structure with the same diameter, the second core rod segment (14) gradually increasing in outer diameter in a direction away from the core cap (2) and the cross section of the second core rod segment (14) along its axial direction being an isosceles trapezoid, the third core rod segment (15) being of the same diameter and having a rectangular cross section along its axial direction; The inner wall of the core body (3) corresponding to the second core rod segment (14) is a slope structure with the same inclination angle as the second core rod segment (14).

7. The one-way self-locking pressurized replaceable device according to claim 1, characterized in that: The inner wall of the core body (3) is provided with a plurality of third protrusions (33) along its axial direction, and the third protrusions (33) include two third protrusions protruding inwardly and symmetrically arranged, the third protrusion close to the end of the core rod (1) is an arc structure and smoothly transitions to the end of the third protrusion away from the core rod (1), and the outer wall of the third protrusion (33) abuts against the outer wall of the core rod (1) to achieve limiting.

8. The one-way self-locking pressurized replaceable device according to claim 1, characterized in that: The inner wall of the core cap (2) is provided with a plurality of second protrusions (21) along its axial direction, the second protrusions comprising two second protrusions protruding inwardly and symmetrically arranged, the second protrusion close to the end of the core rod (1) being an arc structure and smoothly transitioning to the second protrusion away from the end of the core rod (1), the second protrusion (21) being limited by abutting against the outer wall of the core rod (1).

9. The one-way self-locking pressurized replaceable device according to claim 1, characterized in that: The core rod (1), the core cap (2) and the core body (3) are made of plastic material.

10. The one-way self-locking pressurized replaceable device according to claim 1, characterized in that: The core cap (2) and the core body (3) are integrally formed.

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