Structure for stabilizing valve seat

Abstract

The utility model relates to the technical field of valve seats, in particular to a structure for stabilizing a valve seat, which comprises a valve body, a water outlet end and a water inlet end are formed on the valve body to form a waterway, a valve core is arranged in the waterway in a floating mode, an installation cavity is further formed in the waterway to install the valve seat, and the valve seat is matched with the valve core in a sealing mode. A valve rod connected with the valve element is arranged on the valve cover, the section of the valve seat is a conical face, the conical face is gradually expanded from the water inlet end to the water outlet end, an annular step face is formed on the inner wall of the side, close to the water outlet end, of the valve seat, a sealing ring is arranged on the annular step face, a locking sleeve is inserted from the water outlet end along the installation cavity, and the locking sleeve makes contact with the sealing ring, the valve seat and the valve element. The conical surface of the valve seat is matched with the valve body to be combined with axial pressing of the locking sleeve and step limiting of the valve body, so that multiple rigid constraints are formed, and the stability of the valve seat is improved; the valve seat sealing ring, the double elastic clamping blocks of the locking sleeve, the corrugated bending section and the third elastic clamping block are matched in a buffering mode to form a composite elastic sealing structure, and a leakage path is blocked.

Description

Technical Field

[0001] This utility model mainly relates to the field of valve seat technology, specifically a structure for stabilizing a valve seat. Background Technology

[0002] In irrigation systems, valves are key components for controlling water flow. Common valves (such as some gate valves and angle valves) rely on the valve core floating under water pressure and contacting the downstream valve seat to achieve a seal. However, existing valve seats are usually fixed to the valve body's water passage via threads, press-fitting, or simple interference fits. Under continuous or impact water pressure, repeated impacts from the valve core, and system vibration, the valve seat is prone to micro-displacement, loosening, or even deformation, leading to gaps and water leakage. This not only wastes water resources but may also affect irrigation efficiency or damage equipment. Utility Model Content

[0003] The purpose of this invention is to provide a structure for a stable valve seat to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a stable valve seat structure, comprising a valve body, an outlet end and an inlet end formed on the valve body to form a water passage, a valve core floating in the water passage, and an installation cavity formed in the water passage for installing the valve seat, the valve seat and the valve core sealingly fitting together, a valve cover provided on the valve body, a valve stem connected to the valve core provided on the valve cover, the valve seat having a conical cross-section, the conical surface gradually expanding in diameter from the inlet end to the outlet end, an annular stepped surface formed on the inner wall of the valve seat near the outlet end and a sealing ring provided thereon, a locking sleeve inserted along the installation cavity from the outlet end position, the locking sleeve contacting the sealing ring, the valve seat and the valve core respectively.

[0005] Preferably, the locking sleeve is provided with a semi-circular first elastic block and a second elastic block along the horizontal direction. The first elastic block cooperates with the mounting cavity to perform elastic sealing, and the second elastic block cooperates with the valve seat to perform elastic sealing. The end face of the locking sleeve that contacts the valve core is finely polished into a smooth and flat contact surface.

[0006] Furthermore, an annular stepped surface is also formed on the valve body mounting cavity adjacent to the water outlet end, and the locking sleeve extends radially from the valve core end to abut against the annular stepped surface.

[0007] Furthermore, the locking sleeve is a rigid metal tube, and the first elastic block and the second elastic block are partially embedded in the locking sleeve.

[0008] Preferably, three continuous corrugated flexural sections are formed on the outer wall of the valve seat near the water inlet end, and a third elastic locking block is partially embedded on the inner wall of the valve body mounting cavity, the third elastic locking block matching the corrugated flexural sections.

[0009] Preferably, the valve seat is made of wear-resistant metal or high-strength engineering plastic.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0011] By using the conical surface design of the valve seat, the axial clamping of the rigid locking sleeve, and the limiting of the annular stepped surface of the valve body, a multi-layered stable constraint structure is formed. The conical surface fit enhances the radial fit and self-centering ability, the locking sleeve provides strong axial preload and transmits it to the valve seat, and the valve body step precisely limits axial displacement, improving the stability of the valve seat.

[0012] The locking sleeve integrates a first elastic locking block that seals with the valve body mounting cavity, while the second elastic locking block seals with the valve seat, creating multiple dynamic elastic sealing defenses based on the valve seat's own sealing ring. The combination of the valve seat's corrugated flexure section and the valve body's third elastic locking block's buffering fit effectively adapts to assembly tolerances, operational vibrations, and thermal expansion and contraction, fully filling and sealing potential microscopic gaps between the valve seat and valve body, the locking sleeve and valve body, and the locking sleeve and valve seat, thus improving sealing reliability.

[0013] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0014] The accompanying drawings are only used to illustrate the principles, implementation methods, applications, features, and effects of the present invention and other related contents, and should not be considered as limitations on the present invention.

[0015] In the accompanying drawings of the instruction manual:

[0016] Figure 1 This is a side sectional view of the structure of this utility model;

[0017] Figure 2 This is an enlarged view of the structure at point A of this utility model;

[0018] Figure 3 This is an enlarged view of the structure at point B of this utility model;

[0019] Figure label:

[0020] 1. Valve body; 11. Outlet end; 12. Inlet end; 2. Valve cover; 3. Valve stem; 4. Valve core; 5. Valve seat; 51. Corrugated flexible section; 6. Locking sleeve; 61. First elastic locking block; 62. Second elastic locking block; 7. Sealing ring. Detailed Implementation

[0021] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0022] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0023] like Figures 1 to 3 As shown, a stable valve seat structure includes a valve body 1, with an outlet end 11 and an inlet end 12 formed on the valve body 1 to form a water passage. A valve core 4 is floatingly disposed in the water passage, and an installation cavity is also formed in the water passage to install a valve seat 5. The valve seat 5 and the valve core 4 are sealed together. A valve cover 2 is provided on the valve body 1, and a valve stem 3 connected to the valve core 4 is provided on the valve cover 2. The cross-section of the valve seat 5 is a conical surface, which gradually expands in diameter from the inlet end 12 to the outlet end 11. An annular stepped surface is formed on the inner wall of the valve seat 5 near the outlet end 11 and a sealing ring 7 is provided. A locking sleeve 6 is inserted along the installation cavity from the outlet end 11, and the locking sleeve 6 contacts the sealing ring 7, the valve seat 5 and the valve core 4 respectively.

[0024] The locking sleeve 6 is provided with a semi-circular first elastic block 61 and a second elastic block 62 along the horizontal direction. The first elastic block 61 cooperates with the mounting cavity to perform elastic sealing, and the second elastic block 62 cooperates with the valve seat 5 to perform elastic sealing. The end face of the locking sleeve 6 that contacts the valve core 4 is finely polished into a smooth and flat contact surface.

[0025] An annular stepped surface is also formed on the mounting cavity of the valve body 1, adjacent to the water outlet 11. The locking sleeve 6 extends radially away from the valve core 4 and abuts against the annular stepped surface.

[0026] The locking sleeve 6 is a rigid metal tube, and the first elastic block 61 and the second elastic block 62 are partially embedded in the locking sleeve 6.

[0027] Three continuous corrugated flexural sections 51 are formed on the outer wall of the valve seat 5 near the water inlet end 12. A third elastic block is partially embedded in the inner wall of the mounting cavity of the valve body 1, and the third elastic block fits into the corrugated flexural section 51.

[0028] The valve seat 5 is made of wear-resistant metal or high-strength engineering plastic.

[0029] The implementation principle of this application embodiment is as follows: During the use of this product, water enters from the inlet end 12, pushing the floating valve core 4 upward. The water flows through the central channel of the valve seat 5 to the outlet end 11. The closing valve stem 3 presses down the valve core 4 so that its sealing surface fits against the valve seat 5. When water pressure impacts or the valve core 4 hits the valve seat 5, the impact force attempts to push the valve seat 5 towards the outlet end 11. The rigid abutment force of the locking sleeve 6 is transmitted to the stepped surface of the valve body 1 through the rear end face of the valve seat 5, forming an axial hard block. At the same time, the cooperation between the conical surface of the valve seat 5 and the conical surface of the valve body 1 converts the axial force into a radial extrusion force, making the valve seat 5 tightly clamped in the installation cavity. The double constraint completely suppresses the tendency of the valve seat 5 to micro-displace. When the water pressure fluctuates, the deformation buffer of the corrugated flexure section 51 avoids the stress relaxation of the sealing ring 7. The double elastic blocks 61 and 62 dynamically compensate for the assembly tolerance between the locking sleeve 6 and the adjacent parts, blocking the leakage path of water along the circumference of the locking sleeve 6.

[0030] It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from its essential characteristics. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this application is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this application. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A structure for a stable valve seat, comprising a valve body (1), wherein an outlet end (11) and an inlet end (12) are formed on the valve body (1) to form a water passage, a valve core (4) is floatingly disposed within the water passage, and an installation cavity is also formed within the water passage to install a valve seat (5), the valve seat (5) and the valve core (4) being sealed together, a valve cover (2) is provided on the valve body (1), and a valve stem (3) connected to the valve core (4) is provided on the valve cover (2), characterized in that: The valve seat (5) has a tapered cross-section. The tapered surface gradually expands in diameter from the inlet end (12) to the outlet end (11). An annular stepped surface is formed on the inner wall of the valve seat (5) near the outlet end (11) and a sealing ring (7) is provided. A locking sleeve (6) is inserted along the mounting cavity from the outlet end (11). The locking sleeve (6) contacts the sealing ring (7), the valve seat (5) and the valve core (4) respectively.

2. The structure of a stabilizing valve seat according to claim 1, characterized in that: The locking sleeve (6) is provided with a semi-circular first elastic block (61) and a second elastic block (62) along the horizontal direction. The first elastic block (61) cooperates with the mounting cavity to perform elastic sealing, and the second elastic block (62) cooperates with the valve seat (5) to perform elastic sealing. The end face of the locking sleeve (6) that contacts the valve core (4) is finely polished into a smooth and flat contact surface.

3. The structure of a stabilizing valve seat according to claim 2, characterized in that: An annular step surface is also formed on the mounting cavity of the valve body (1) at the position adjacent to the water outlet (11), and the end of the locking sleeve (6) away from the valve core (4) extends radially and abuts against the annular step surface.

4. The structure of a stabilizing valve seat according to claim 2, characterized in that: The locking sleeve (6) is a rigid metal tube, and the first elastic block (61) and the second elastic block (62) are partially embedded in the locking sleeve (6).

5. The structure of a stabilizing valve seat according to claim 1, characterized in that: Three continuous corrugated flexural sections (51) are formed on the outer wall of the valve seat (5) near the water inlet end (12). A third elastic block is partially embedded on the inner wall of the valve body (1) mounting cavity. The third elastic block fits into the corrugated flexural section (51).

6. The structure of a stabilizing valve seat according to claim 1, characterized in that: The valve seat (5) is made of wear-resistant metal or high-strength engineering plastic.

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