Water meter ball valve with non-return core

Abstract

The utility model discloses a water meter ball valve with a non-return core. The water meter ball valve comprises a valve body, a valve bonnet, a ball valve rod and an operation portion arranged on the ball valve rod. The valve body is provided with a water inlet end, the valve bonnet is provided with a water outlet end, the ball valve rod is arranged between the water inlet end and the water outlet end, the water outlet end is provided with an installation channel, and a non-return assembly is arranged in the installation channel. The non-return assembly comprises a valve seat, a valve sleeve and a valve element, the valve seat and the valve sleeve abut against each other in the axial direction, the valve element is arranged on the valve seat in a penetrating mode, the outer surface of the valve sleeve is matched with the inner surface of the installation channel in a sealing mode, a spring abuts against the portion between the valve element and the valve seat, and a water flow passing opening is formed in the valve seat. The valve sleeve is provided with a sealing seat, a sealing component is arranged at the end of the valve element, the sealing seat and the sealing component abut against each other in the direction away from the water inflow direction, the sealing component comprises at least two lap joint parts facing the sealing seat, and the sealing seat is provided with a water blocking face facing the lap joint parts. The lap joint part is arranged to abut against the water retaining face under the action of reverse water flow and the spring.

Description

Technical Field

[0001] The utility model relates to the technical field of steam cleaning equipment, in particular to a water meter ball valve with a check core. Background Art

[0002] The water meter ball valve plays an important role in the tap water system. It is used to control the on-off of the water inlet. The water meter ball valve on the market is also equipped with a check valve, which mainly prevents water from flowing back and ensures that water can only flow in one direction. This helps to protect the water meter, pipeline system and water-using equipment from pollution and damage. However, the check valve in the water meter ball valve in the prior art is generally installed by an independent threaded joint, which is inconvenient to install. In addition, the sealing performance of the check valve in the closed state is poor, resulting in a certain amount of water leakage, affecting the accuracy of water meter measurement. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model aims to provide a water meter ball valve with a check core.

[0004] The above technical objectives of the utility model are achieved through the following technical solutions: a water meter ball valve with a check core, comprising: a valve body and a valve bonnet fixed to each other, a ball valve stem arranged between the valve body and the valve bonnet, and an operating part arranged on the ball valve stem; the valve body is provided with a water inlet end, the valve bonnet is provided with a water outlet end, the ball valve stem is arranged between the water inlet end and the water outlet end, the water outlet end is provided with a mounting channel, and a check assembly is arranged in the mounting channel;

[0005] The non-return assembly comprises a valve seat and a valve sleeve axially abutting against each other, and a valve core inserted into the valve seat, the outer surface of the valve sleeve is sealed with the inner surface of the installation channel, a spring is abutted between the valve core and the valve seat, and a water flow port is provided on the valve seat;

[0006] The valve sleeve is provided with a sealing seat, and the end of the valve core is provided with a sealing component. The sealing seat and the sealing component are abutted in the direction away from the incoming water flow. The sealing component includes at least two overlapping parts arranged toward the sealing seat, and the sealing seat is provided with a water retaining surface arranged facing the overlapping part. The overlapping part is arranged to abut against the water retaining surface under the action of reverse water flow and spring.

[0007] Furthermore, the installation channel forms a first limit step on the valve sleeve, the end of the valve cap facing away from the ball valve stem is provided with a second limit step, the non-return assembly is placed in the installation channel and abuts against the first limit step, the second limit step is provided with a limit piece, the limit piece keeps the non-return assembly in the installation channel, and a first sealing ring is embedded on the outside of the valve sleeve and abuts against the inner wall of the installation channel.

[0008] Furthermore, a connecting nut is provided on the outer sleeve of the water outlet end of the valve cap, and a threaded connection portion is formed on the outside of the water outlet end of the connecting nut, and a second sealing ring and a sealing gasket are provided in sequence between the threaded connection portion and the water outlet end of the valve cap, and the sealing gasket forms a supporting surface on the surface of the water outlet end.

[0009] Furthermore, the sealing seat includes a first matching portion radially extending out of the water retaining surface, and the sealing component includes a first overlapping portion axially abutting against the first matching portion, and the first overlapping portion abuts against the second matching portion on one side against the water flow direction.

[0010] Furthermore, the sealing component includes a main body and a sealing ring body matched with an end portion of the main body, at least one matching portion is arranged on the sealing ring body, and the main body and the valve core are integrally formed.

[0011] Furthermore, a second matching portion is provided on the first matching portion extending toward the direction of the incoming water flow, the water retaining surface is formed on the second matching portion, and the inner diameter of the water retaining surface expands along the water flow direction, a second overlapping portion is embedded on the sealing component, the second overlapping portion abuts against the second matching portion, and has a tendency to approach the first matching portion under the action of the reverse water flow and the spring.

[0012] Furthermore, the second matching portion is embedded between the first overlapping portion and the outer edge of the end portion of the main body.

[0013] Furthermore, a third overlap portion is provided on the outer edge of the main body, and the third overlap portion is located on the rear side of the second overlap portion in the water flow direction, and has a tendency to approach the water retaining surface under the action of the reverse water flow and the spring, and the outer diameter of the third overlap portion is larger than the outer diameter of the first overlap portion, or larger than the outer diameters of the first overlap portion and the second overlap portion.

[0014] Furthermore, a water-facing surface disposed in the reverse direction of the water flow is provided on the back of the sealing component, the water-facing surface is disposed in a conical surface, and the outer edge of the water-facing surface is disposed close to the inner surface of the valve sleeve.

[0015] Further, the first overlapping portion is configured as a conical surface, and the first matching portion is configured as an arc-shaped convex portion; or, the first overlapping portion and the first matching portion are connected in a planar manner.

[0016] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0017] The utility model provides an installation channel at the water outlet end of the valve cap, after the check assembly can be directly plugged into the installation channel, the check assembly is limited by a limiter built into the inner side of the water outlet end, which effectively improves the convenience of installation of the check assembly. At the same time, by controlling the ball valve stem and sealing the check assembly in the reverse water flow direction, when the water meter is replaced, backflow is effectively prevented, which is convenient for later maintenance.

[0018] The sealing component is provided with a plurality of mating parts, which are distributed with different outer diameters in the axial direction and are all arranged toward the inclined guide surface. Under normal conditions, the spring acts on the valve core and forces the sealing component to abut against the sealing seat. When there is a reverse water flow, the reverse water flow can act on the sealing component, so that the mating part and the inclined guide surface are further overlapped, thereby improving the sealing performance of the anti-return assembly in the closed state, so as to ensure the sealing in the reverse water flow direction and the accuracy of the water meter measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 It is a cross-sectional view of the utility model;

[0021] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0022] Figure 4 A cross-sectional view of another embodiment of the utility model;

[0023] Figure 5 It is a structural schematic diagram of the anti-return assembly of the utility model;

[0024] In the figure: 1. Valve body; 1.1. Water inlet end; 2. Valve bonnet; 2.1. Water outlet end; 3. Ball valve stem; 3.1. Operating part;

[0025] 4. Installation channel; 4.1. First limiting step; 4.2. Second limiting step; 4.3. Limiting member; 4.4. First sealing ring;

[0026] 5. Check assembly; 5.1. Valve seat; 5.11. Water flow outlet; 5.2. Valve sleeve; 5.3. Valve core; 5.4. Spring;

[0027] 5.5, sealing seat; 5.51, first matching portion; 5.52, second matching portion;

[0028] 5.6, sealing member; 5.61, main body; 5.62, sealing ring body; 5.63, water-facing surface;

[0029] 5.7, water retaining surface;

[0030] 6. Connecting nut; 6.1. Threaded connection; 6.2. Second sealing ring; 6.3. Sealing gasket;

[0031] 7. First overlapping portion; 8. Second overlapping portion; 9. Third overlapping portion; DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] It should be understood that although the terms upper, middle, lower, top, end, etc. appear in this article to describe various elements, these elements are not limited by these terms. These terms are only used to distinguish elements from each other for easy understanding, and are not used to define any direction or order limitation.

[0034] like Figure 1-5 As shown, a water meter ball valve with a check core comprises:

[0035] A valve body 1 and a valve bonnet 2 are fixed to each other, a ball valve stem 3 is arranged between the valve body 1 and the valve bonnet 2, and an operating part 3.1 is arranged on the ball valve stem 3; a water inlet end 1.1 is arranged on the valve body 1, a water outlet end 2.1 is arranged on the valve bonnet 2, the ball valve stem 3 is arranged between the water inlet end 1.1 and the water outlet end 2.1, a water channel is formed between the water inlet end 1.1 of the valve body 1 and the water outlet end 2.1 of the valve bonnet 2, and the ball valve stem 3 is operated to connect the water channel and close the water channel through the operating part 3.1 extending outward from the valve body 1 and the valve bonnet 2.

[0036] The water outlet 2.1 is provided with an installation channel, and a non-return assembly 5 is provided in the installation channel. The non-return assembly 5 includes a valve seat 5.1 and a valve sleeve 5.2 that abut against each other axially, and a valve core 5.3 that is inserted into the valve seat 5.1. The outer surface of the valve sleeve 5.2 is sealed with the inner surface of the installation channel. A spring 5.4 abuts against the valve core 5.3 and the valve seat 5.1. The valve sleeve 5.2 and the valve seat 5.1 are provided with a water flow opening 5.11. Under the action of the spring 5.4, the valve core 5.3 is always kept in a closed state with the valve sleeve 5.2. In the process of water inflow, the water flow presses the valve core 5.3 and overcomes the action force of the spring 5.4, so that the water flow can pass through the gap between the valve core 5.3 and the valve sleeve 5.2.

[0037] The valve sleeve 5.2 is provided with a sealing seat 5.5, and a sealing member 5.6 is provided at the end of the valve core 5.3. The sealing seat 5.5 is arranged in an annular shape and is provided with a through hole for water to flow through. The sealing member 5.6 includes at least two overlapping parts arranged toward the sealing seat 5.5, and the sealing seat 5.5 is provided with a water retaining surface 5.7 arranged facing the matching part. The overlapping part is arranged to abut against the water retaining surface 5.7 under the action of reverse water flow and spring 5.4, thereby ensuring reliable sealing between the sealing seat 5.5 and the sealing member 5.6 in the closed state to prevent water backflow.

[0038] The water retaining surface 5.7 is at least partially arranged in a conical surface, so that when there is a reverse water flow, the sealing component 5.6 is further pressed against the water retaining surface 5.7 under the action of the reverse water flow, thereby further improving the tightness of the sealing fit.

[0039] In this embodiment, the sealing seat 5.5 specifically extends radially inward from the installation channel, and the sealing member 5.6 on the valve core 5.3 specifically abuts against the sealing seat 5.5 on the side away from the incoming water flow, so that the cooperation between the sealing member 5.6 and the sealing seat 5.5 is only stopped in the reverse direction of the water flow, and under the action of the reverse water flow, the sealing cooperation between the two is tighter, and under the action of the incoming water flow, the sealing member 5.6 and the sealing seat 5.5 can still be opened to allow the water flow to pass normally.

[0040] Further references Figure 3 As a further implementation method of installing the non-return assembly 5, the inner diameter of the installation channel is larger than the inner diameter of the water channel, and a first limiting step 4.1 is formed on the valve sleeve 5.2. A second limiting step 4.2 is provided at one end of the valve cap 2 away from the ball valve stem 3. The non-return assembly 5 has a regular outer contour. As the non-return assembly 5 is placed in the installation channel and abuts against the first limiting step 4.1, a limiting member 4.3 is provided on the second limiting step 4.2, and the limiting member 4.3 keeps the non-return assembly 5 in the installation channel.

[0041] Specifically, the second limiting step 4.2 is preferably groove-shaped, and the limiting member 4.3 is preferably a retaining spring, so that the axial position of the non-return assembly 5 in the installation channel is limited by the retaining spring.

[0042] Furthermore, a first sealing ring 4.4 is embedded on the outside of the valve sleeve 5.2 and abuts against the inner wall of the installation channel. In this way, the sealing between the non-return assembly 5 and the valve cap 2 is ensured. At the same time, the first sealing ring 4.4 is preferably protruding from the outer contour of the valve sleeve 5.2, thereby improving the tightness of the fit and effectively limiting the radial movement of the non-return assembly 5 in the installation channel.

[0043] like Figure 2 As shown, in order to facilitate the connection between the water meter ball valve and other pipe fittings, a connecting nut 6 is provided on the outer sleeve of the water outlet end 2.1 of the valve cap 2, and a threaded connection portion 6.1 is formed on the outside of the water outlet end 2.1 of the valve cap 2, and a second sealing ring 6.2 and a sealing gasket 6.3 are provided in sequence between the threaded connection portion 6.1 and the water outlet end 2.1 of the valve cap 2, and the sealing gasket 6.3 forms a supporting surface on the surface of the water outlet end 2.1, wherein, during the process of threaded connection between the pipe fitting to be connected and the connecting nut 6, it gradually abuts against the sealing gasket 6.3, thereby ensuring the sealing between the connecting end face of the pipe fitting to be connected and the valve cap 2, and at the same time, the second sealing ring 6.2 plays a further sealing role.

[0044] As a further implementation method for the cooperation between the sealing seat 5.5 and the sealing component 5.6, the sealing seat 5.5 includes a first matching portion 5.51 radially extending out of the water retaining surface 5.7, and the sealing component 5.6 includes a first overlapping portion 7 axially abutting against the first matching portion 5.51, and the first overlapping portion 7 abuts against the first matching portion 5.51 on the side against the water flow direction. Under normal circumstances, the first matching portion 5.51 and the first overlapping portion 7 form an axial abutment. One of the functions of the cooperation between the two is to form a limit on the valve core 5.3, and the second function is to form the first seal of the travel check function.

[0045] from Figure 3 It can be seen that, as an option, the first overlap portion 7 is arranged in a conical surface, and the first matching portion 5.51 is an arc-shaped convex portion. The arc-shaped convex portion is conducive to ensuring the structural strength of the matching portion on the sealing seat 5.5, and the conical first overlap portion 7 is conducive to further matching with the first matching portion 5.51 under the action of reverse water flow and spring 5.4.

[0046] from Figure 4 It can be seen that, as another option, the first overlapping portion 7 is planarly joined with the first matching portion 5.51. In this way, the planar docking method effectively increases the matching area of ​​the sealing overlap and improves the sealing reliability.

[0047] like Figure 3 As shown, in other embodiments, the sealing component 5.6 includes a main body 5.61, and a sealing ring body 5.62 matched at the end of the main body 5.61, the main body 5.61 includes a rod-shaped part, and an outer edge part at the end of the rod-shaped part, the sealing ring body 5.62 is arranged at the end of the main body 5.61 as an independent component, and the first overlapping portion 7 is arranged on the outer edge of the sealing ring body 5.62, wherein the main body 5.61 and the valve core 5.3 are integrally formed, the sealing ring body 5.62 can be selected as a flexible sealing material, or the first overlapping portion 7 on the outer edge of the sealing ring body 5.62 is a flexible sealing material, the purpose of which is to further improve the first matching portion 5.51 and the first overlapping portion 7 when subjected to a force in the direction of the reverse water flow, so that the two can better overlap and form a sealed fit.

[0048] Of course, the sealing ring body 5.62 can also be as follows Figure 4 As shown, the flexible first overlap portion is integrally formed with the sealing member 5.6, and the flexible first overlap portion can be formed of a flexible sealing material by a two-color injection molding method.

[0049] Furthermore, the first matching portion 5.51 is extended toward the direction of the incoming water flow to form a second matching portion 5.52, the water retaining surface 5.7 is formed on the second matching portion 5.52, and the inner diameter of the water retaining surface 5.7 expands along the water flow direction, and a second overlapping portion 8 is embedded in the sealing component 5.6, the second overlapping portion 8 abuts against the second matching portion 5.52, and has a tendency to approach the first matching portion 5.51 under the action of the reverse water flow and the spring 5.4.

[0050] The water retaining surface 5.7 is specifically arranged in a conical surface, so that the sealing component 5.6 can form a reliable sealing overlap with the sealing seat 5.5 under the action of the reverse water flow and the spring 5.4.

[0051] Specifically, the second overlap portion 8 is embedded between the first overlap portion 7 and the outer edge of the end of the main body 5.61. The second overlap portion 8 is preferably a sealing ring, and the second overlap portion 8 can be deformed under the action of the reverse water flow and the spring 5.4, and tend to the first matching portion 5.51 to form a stop seal.

[0052] Specifically, a third lap joint 9 is provided on the outer edge of the main body 5.61, and the third lap joint 9 is located on the rear side of the second lap joint 8 in the direction of water inlet flow, and has a tendency to approach the water retaining surface 5.7 under the action of the reverse water flow and the spring 5.4, and the outer diameter of the third lap joint 9 is larger than the outer diameter of the first lap joint 7, or larger than the outer diameters of the first lap joint 7 and the second lap joint 8. In this way, when the reverse water flow pressure is large, the third lap joint 9 can directly abut against the water retaining surface 5.7, and at this time, the sealing ring of the second lap joint 8 abuts against the water retaining surface 5.7, and the first matching part 5.51 of the first lap joint 7 forms a reliable abutment, thereby forming three seals in the reverse water flow direction, effectively preventing water backflow and sealing in the closed state.

[0053] In other embodiments, a water-facing surface 5.63 facing the direction of the reverse water flow is provided on the back of the sealing member 5.6. The water-facing surface 5.63 is provided in a conical shape, and the outer edge of the water-facing surface 5.63 is provided close to the inner surface of the valve sleeve 5.2. By increasing the effective receiving area of ​​the water-facing surface 5.63, the force of the reverse water flow on the valve core 5.3 in the sealing abutment direction is ensured, so that the non-return component 5 can ensure the non-return effect.

[0054] The matching parts refer to the first matching part 5.51, the second matching part 5.52 and the third matching part mentioned above, and the first matching part 5.51, the second matching part 5.52 and the third matching part are arranged in sequence in the direction of the incoming water flow.

[0055] In the above embodiment, the back of the outer edge of the main body 5.61 of the valve core 5.3 has a groove, and a convex portion is provided on the valve seat 5.1. The spring 5.4 is specifically abutted in the groove and sleeved outside the convex portion.

[0056] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A water meter ball valve with a check core, characterized in that: include: A valve body (1) and a valve bonnet (2) fixed to each other, a ball valve stem (3) arranged between the valve body (1) and the valve bonnet (2), and an operating portion (3.1) arranged on the ball valve stem (3); the valve body (1) is provided with a water inlet end (1.1), the valve bonnet (2) is provided with a water outlet end (2.1), the ball valve stem (3) is arranged between the water inlet end (1.1) and the water outlet end (2.1), the water outlet end (2.1) is provided with a mounting channel, and a check assembly (5) is provided in the mounting channel; The non-return assembly (5) comprises a valve seat (5.1) and a valve sleeve (5.2) which are axially abutted against each other, and a valve core (5.3) which is inserted into the valve seat (5.1); the outer surface of the valve sleeve (5.2) is sealingly matched with the inner surface of the installation channel; a spring (5.4) is abutted between the valve core (5.3) and the valve seat (5.1); and a water flow port (5.11) is provided on the valve seat (5.1); The valve sleeve (5.2) is provided with a sealing seat (5.5), the end of the valve core (5.3) is provided with a sealing component (5.6), the sealing seat (5.5) and the sealing component (5.6) are in abutment with each other in a direction away from the inlet water flow, the sealing component (5.6) comprises at least two overlapping parts arranged toward the sealing seat (5.5), and the sealing seat (5.5) is provided with a water retaining surface (5.7) arranged facing the overlapping part, and the overlapping part is arranged to be in abutment with the water retaining surface (5.7) under the action of reverse water flow and a spring (5.4).

2. A water meter ball valve with a check core according to claim 1, characterized in that: The installation channel forms a first limiting step (4.1) on the valve sleeve (5.2); a second limiting step (4.2) is provided on the end of the valve cap (2) facing away from the ball valve stem (3); the non-return assembly (5) is placed in the installation channel and abuts against the first limiting step (4.1); a limiting member (4.3) is provided on the second limiting step (4.2); the limiting member (4.3) keeps the non-return assembly (5) in the installation channel; and a first sealing ring (4.4) is embedded outside the valve sleeve (5.2) and abuts against the inner wall of the installation channel.

3. A water meter ball valve with a check core according to claim 1, characterized in that: The water outlet end (2.1) of the valve cap (2) is provided with a connecting nut (6) on its outer sleeve, the connecting nut (6) is provided with a threaded connection portion (6.1) outside the water outlet end (2.1), and a second sealing ring (6.2) and a sealing gasket (6.3) are provided in sequence between the threaded connection portion (6.1) and the water outlet end (2.1) of the valve cap (2), the sealing gasket (6.3) forming a supporting surface on the surface of the water outlet end (2.1).

4. A water meter ball valve with a check core according to claim 1, characterized in that: The sealing seat (5.5) comprises a first matching portion (5.51) radially extending out of the water retaining surface (5.7), and the sealing component (5.6) comprises a first overlapping portion (7) axially abutting against the first matching portion (5.51), and the first overlapping portion (7) abuts against the second matching portion (5.52) on one side in the direction opposite to the water flow.

5. A water meter ball valve with a check core according to any one of claims 1 to 4, characterized in that: The sealing component (5.6) comprises a main body (5.61) and a sealing ring body (5.62) fitted at the end of the main body (5.61), at least one overlapping portion is arranged on the sealing ring body (5.62), and the main body (5.61) and the valve core (5.3) are integrally formed.

6. A water meter ball valve with a check core according to claim 4, characterized in that: The first matching portion (5.51) is provided with a second matching portion (5.52) extending in the direction of the incoming water flow, the water retaining surface (5.7) is formed on the second matching portion (5.52), and the inner diameter of the water retaining surface (5.7) expands along the direction of the water flow, and the sealing component (5.6) is embedded with a second overlapping portion (8), the second overlapping portion (8) abuts against the second matching portion (5.52), and has a tendency to approach the first matching portion (5.51) under the action of the reverse water flow and the spring (5.4).

7. A water meter ball valve with a check core according to claim 6, characterized in that: The second overlapping portion (8) is embedded between the first overlapping portion (7) and the outer edge of the end of the main body (5.61).

8. A water meter ball valve with a check core according to claim 7, characterized in that: A third overlapping portion (9) is provided on the outer edge of the main body (5.61). The third overlapping portion (9) is located at the rear side of the second overlapping portion (8) in the water flow direction and has a tendency to approach the water retaining surface (5.7) under the action of the reverse water flow and the spring (5.4). The outer diameter of the third overlapping portion (9) is greater than the outer diameter of the first overlapping portion (7), or greater than the outer diameters of the first overlapping portion (7) and the second overlapping portion (8).

9. A water meter ball valve with a check core according to claim 1, characterized in that: The back of the sealing component (5.6) is provided with a water-facing surface (5.63) arranged in the direction opposite to the water flow, the water-facing surface (5.63) is arranged in a conical surface, and the outer edge of the water-facing surface (5.63) is arranged close to the inner surface of the valve sleeve (5.2).

10. A water meter ball valve with a check core according to claim 8, characterized in that: The first overlapping portion (7) is arranged in a conical surface, and the first matching portion (5.51) is an arc-shaped convex portion; or, the first overlapping portion (7) and the first matching portion (5.51) are joined in a planar manner.

Images