Running ball valve

Abstract

The utility model belongs to the technical field of ball valves, and provides a union ball valve which comprises a valve seat, a valve ball is rotatably connected in the valve seat, and a rotation control piece is arranged between the valve ball and the valve seat. The valve plug is connected to one end of the valve seat in a threaded mode, a screwing-in limiting mechanism is arranged between the valve plug and the valve seat, and valve ball pads are arranged between the valve plug and the valve ball and between the valve ball and the inner wall, away from the valve plug, of the valve seat respectively. The number of the union connecting assemblies is not less than two, the union connecting assemblies are respectively and fixedly communicated with the valve seat, each union connecting assembly comprises a union, a centering mechanism is arranged between the union and the valve seat, the union is communicated with the valve ball, and the union is fixedly connected with the valve seat through a union nut. When the union ball valve is assembled, the screwing-in position of the valve plug can be accurately controlled, so that the rotating torque of the valve ball is moderate, the leakage situation is avoided, and meanwhile, the situation that the union and the valve seat are relatively large in dislocation after being installed can be avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of ball valve, especially a kind of by order ball valve. BACKGROUND

[0002] Ball valve is a kind of valve driven by valve stem, and rotates around ball valve axis, can be used for the regulation and control of fluid.Ball valve itself has the advantages of simple structure and reliable sealing, and is widely used, but there are still some deficiencies in many ball valves currently used, such as between valve plug and valve seat, it is inconvenient to rotate into too much, which will lead to the increase of valve ball torque, or it is inconvenient to rotate into too little, which will lead to the leakage of valve ball, and between by order and valve seat, it is inconvenient to make by order and valve seat coaxial during on-site assembly, and it is easy to produce large misalignment. SUMMARY

[0003] The utility model discloses a kind of by order ball valve, to solve the above problems, reach when assembling by order ball valve can accurately control the rotating position of valve plug, make the rotating torque of valve ball moderate and will not appear leakage condition, simultaneously avoid by order and valve seat exist large misalignment condition after installation.

[0004] To achieve the above object, the utility model provides the following scheme: a kind of by order ball valve, comprising:

[0005] Valve seat, the valve seat is rotatably connected with valve ball, and rotating control piece is arranged between the valve ball and the valve seat;

[0006] Valve plug, the valve plug is screw-connected in one end of the valve seat, rotating limiting mechanism is arranged between the valve plug and the valve seat, valve ball pad is respectively arranged between the valve plug and the valve ball, and the inner wall of the valve ball and the valve seat away from the valve plug;

[0007] Several by order connecting assemblies, the by order connecting assemblies are not less than two groups, and are respectively fixed communication with the valve seat, the by order connecting assembly includes by order, the centering mechanism is arranged between the by order and the valve seat, the by order is communicated with the valve ball, and the by order and the valve seat are fixedly connected by by order nut.

[0008] Preferably, the rotating limiting mechanism includes valve seat limiting surface and valve plug limiting surface, the valve seat limiting surface is annularly arranged on the side of the valve seat close to the valve plug, the valve plug limiting surface is arranged on the side of the valve plug close to the valve seat, and the valve seat limiting surface is attached to the valve plug limiting surface.

[0009] Preferably, the centering mechanism comprises a stem limiting sub-hole and a valve seat limiting sub-hole, the stem limiting sub-hole is annularly arranged at the edge of the stem end close to the valve seat, and the valve seat limiting sub-hole is arranged at the side of the valve seat away from the valve ball, and the stem limiting sub-hole is in abutment with the valve seat limiting sub-hole.

[0010] Preferably, a valve ball gasket sealing ring is arranged in abutment between the valve plug and the valve ball gasket, and between the valve seat and the valve ball gasket, respectively.

[0011] Preferably, a stem sealing ring is arranged in abutment between the stem and the valve plug.

[0012] Preferably, a plug seat sealing ring is arranged in abutment between the valve plug and the valve seat.

[0013] Preferably, the rotating control member comprises a valve rod, the valve rod is rotatably connected in the valve seat, and the valve rod is in transmission connection with the valve ball, a valve rod sealing ring is arranged on the valve rod, and the valve rod sealing ring is fixedly connected in the valve seat.

[0014] Compared with the prior art, the utility model has the advantages and technical effects that: overall, the utility model discloses a stem limiting mechanism, which fixes the rotation depth of the valve plug, thereby controlling the abutting force between the valve ball and the valve ball gasket, making the rotation torque of the valve ball moderate and without leakage, and the centering mechanism makes the stem through hole and the valve seat through hole of the valve seat in the centering state after the stem abuts with the valve seat, avoiding the existence of large misalignment after the stem and the valve seat are installed. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiments will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative labor on the premise of the drawings.

[0016] Figure 1 It is the assembly sectional view of the stem ball valve of the utility model;

[0017] Figure 2 It is the valve seat sectional view of the utility model;

[0018] Figure 3 It is the valve plug sectional view of the utility model;

[0019] Figure 4 It is the stem sectional view of the utility model;

[0020] Figure 5 It is the assembly sectional view of the stem ball valve in embodiment two;

[0021] Figure 6 Figure 2 is an assembly view of the ball valve from the top sectional view in Example 2;

[0022] Wherein, 1, valve stem; 2, valve stem sealing ring; 3, pressing block; 4, valve seat; 41, valve seat limiting surface; 42, valve seat limiting sub-port; 43, valve seat through hole; 5, ball nut; 6, ball; 61, ball limiting sub-port; 62, ball through hole; 7, valve plug; 71, valve plug limiting surface; 8, valve ball pad; 9, ball sealing ring; 10, plug seat sealing ring; 11, valve ball pad sealing ring; 12, valve ball. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0024] In order to make the above-mentioned purposes, features and advantages of the present application more apparent, clear and understandable, the present application will be described in further detail below with reference to the drawings and specific embodiments.

[0025] Example 1:

[0026] With reference to Figures 1-4 The present application provides a ball valve, in particular a straight-through ball valve, comprising:

[0027] A valve seat 4 is provided, and a valve ball 12 is rotatably connected in the valve seat 4, and a rotation control member is arranged between the valve ball 12 and the valve seat 4;

[0028] A valve plug 7 is threadedly connected to one end of the valve seat 4, and a screwing limiting mechanism is arranged between the valve plug 7 and the valve seat 4, and valve ball pads 8 are arranged between the valve plug 7 and the valve ball 12 and between the valve ball 12 and the inner wall of the valve seat 4 away from the valve plug 7.

[0029] Two groups of ball connecting assemblies are fixedly connected to the two ends of the valve seat 4, and each ball connecting assembly comprises a ball 6, a centering mechanism is arranged between the ball 6 and the valve seat 4, the ball 6 is in communication with the valve ball 12, and the ball 6 and the valve seat 4 are fixedly connected through a ball nut 5.

[0030] The rotation control piece mainly controls the opening and closing of the valve seat 4 by controlling the flow in the valve ball 12 and the flow in the valve seat 4. The screwing limiting mechanism mainly prevents the valve plug 7 from being screwed in further when the valve plug 7 is screwed in to a proper depth, thereby controlling the contact strength between the valve ball gasket 8 on the left side of the valve plug 7 and the valve seat 4 and the valve plug 7, and preventing the valve ball 12 from leaking. The centering mechanism mainly makes the guide hole 62 in the guide 6 and the valve seat hole 43 in the valve seat 4 be in the centered state after the guide 6 abuts against the valve seat 4. The guide nut 5 is screwed on the valve seat 4 to make the guide 6 abut against the end of the valve seat 4, thereby realizing the connection between the two. Overall, the screwing limiting mechanism is arranged to fix the screwing depth of the valve plug, thereby controlling the contact strength between the valve ball and the valve ball gasket, preventing the valve ball from leaking, and making the guide hole and the valve seat hole 43 in the valve seat be in the centered state after the guide abuts against the valve seat, thereby preventing the guide and the valve seat from being misaligned after being installed.

[0031] Further optimization scheme, the screwing limiting mechanism includes valve seat limiting surface 41 and valve plug limiting surface 71, valve seat limiting surface 41 annularly open in the side of valve seat 4 close to valve plug 7, valve plug limiting surface 71 open in the side of valve plug 7 close to valve seat 4, valve seat limiting surface 41 and valve plug limiting surface 71 are in contact.

[0032] As shown in Figures 1-3 , the valve seat limiting surface 41 is a stepped groove opened on the right inner wall of the valve seat 4, and the valve plug limiting surface 71 is the left side wall surface of the right end of the valve plug 7. The radial position size of the valve seat limiting surface 41 and the valve plug limiting surface 71 is designed. When the left side of the valve plug 7 is screwed into the valve seat 4 by threads, the valve plug limiting surface 71 abuts against the valve seat limiting surface 41, and the valve plug 7 cannot be screwed in further. At this time, the extrusion force of the left side of the valve plug 7 against the valve ball gasket 8 is moderate, which can meet the use requirement.

[0033] Further optimization scheme, the centering mechanism includes guide limiting sub-hole 61 and valve seat limiting sub-hole 42, guide limiting sub-hole 61 annularly open in the edge of the end of guide 6 close to valve seat 4, valve seat limiting sub-hole 42 open in the side of valve seat 4 away from valve ball 12, guide limiting sub-hole 61 and valve seat limiting sub-hole 42 are in contact.

[0034] As shown in Figure 1 , Figure 2 , and Figure 4As shown, the by-order limiting sub-port 61 is an annular step groove opened in the left end face edge of the by-order 6, and the valve seat limiting sub-port 42 is an annular groove opened on both sides of the valve seat 4. When the by-order 6 is abutted in the valve seat 4, the by-order 6 is radially limited by making the by-order limiting sub-port 61 just clamped in the valve seat limiting sub-port 42, so that the by-order through hole 62 is just in the centering state with the valve seat through hole 43 in the valve seat 4, avoiding the misalignment.

[0035] Further optimization scheme, the valve plug 7 and the valve ball pad 8, the valve seat 4 and the valve ball pad 8 are respectively abutted with the valve ball pad sealing ring 11.

[0036] Further optimization scheme, the by-order 6 and the valve plug 7 are abutted with the by-order sealing ring 9.

[0037] Further optimization scheme, the valve plug 7 and the valve seat 4 are abutted with the plug seat sealing ring 10.

[0038] Further optimization scheme, the rotating control member includes a valve stem 1, the valve stem 1 is rotatably connected in the valve seat 4, and the valve stem 1 is in transmission connection with the valve ball 12, the valve stem 1 is sleeved with a valve stem sealing ring 2, and the valve stem sealing ring 2 is fixedly connected in the valve seat 4.

[0039] As shown, Figure 1 The top of the valve seat 4 is fixedly connected with a pressing block 3, and the valve stem 1 penetrates through the pressing block 3. The bottom of the pressing block 3 and the valve seat 4 abut the valve stem sealing ring 2, which limits the valve stem sealing ring 2, and can extrude the valve stem sealing ring 2 to make it tightly fit the wall surface of the valve stem 1.

[0040] Embodiment two:

[0041] The embodiment provides a by-order three-way ball valve, as shown in Figure 5 and Figure 6 The difference between the embodiment and the embodiment one is that a third group of through ports are further opened on the side wall of the valve seat 4, the valve plug 7 is in threaded connection in the third group of through ports, the valve plug 7 and the valve seat 4 are provided with a screwing limiting mechanism, and the valve plug 7 and the valve ball 12 are provided with the valve ball pad 8. The by-order 6 is further fixedly connected with the by-order nut 5 through the through port, the by-order 6 and the valve seat 4 are provided with a centering mechanism, and the by-order 6 is in communication with the valve ball 12.

[0042] In the embodiment, only the third group of through ports are opened on the valve seat 4, the screwing limiting mechanism, the centering mechanism, the by-order 6, the valve plug 7, the valve ball pad 8 and the by-order nut 5 are the same as those in the embodiment one, and thus will not be described again, so as to realize the by-order ball valve in the three-way form and enrich the use form of the by-order ball valve in the utility model.

[0043] In the description of the utility model, need understanding is, the term "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and so on indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawing, just for the convenience of describing the utility model, and not indicate or imply that the indicated device or element must have a particular orientation, construct and operate in a particular orientation, therefore can not be understood as limiting the utility model.

[0044] The above-described embodiments are only descriptions of the preferred modes of the utility model, and do not limit the scope of the utility model, and various modifications and improvements to the technical solutions of the utility model made by those skilled in the art without departing from the design spirit of the utility model should fall within the protection scope defined by the claims of the utility model.

Claims

1. A ball valve, characterized in that, The utility model relates to a valve, including: The valve ball (12) is rotatably connected in the valve seat (4), and a rotation control piece is arranged between the valve ball (12) and the valve seat (4); The valve plug (7) is threadedly connected at one end of the valve seat (4), a screwing limiting mechanism is arranged between the valve plug (7) and the valve seat (4), and valve ball pads (8) are respectively arranged between the valve plug (7) and the valve ball (12) and between the valve seat (4) and the inner wall of the valve ball (12) away from the valve plug (7); A plurality of connecting assemblies are arranged, the number of the connecting assemblies is not less than two, and the connecting assemblies are respectively fixedly communicated with the valve seat (4); the connecting assemblies include a connecting rod (6), the connecting rod (6) is arranged between the valve seat (4) and the connecting rod (6) and communicated with the valve ball (12), and the connecting rod (6) and the valve seat (4) are fixedly connected through a connecting rod nut (5).

2. A globe valve according to claim 1, characterized in that: The screwing limiting mechanism includes a valve seat limiting surface (41) and a valve plug limiting surface (71), the valve seat limiting surface (41) is annularly arranged on the side of the valve seat (4) close to the valve plug (7), the valve plug limiting surface (71) is arranged on the side of the valve plug (7) close to the valve seat (4), and the valve seat limiting surface (41) is attached to the valve plug limiting surface (71).

3. A globe valve according to claim 1, characterized in that: The centering mechanism includes a connecting rod limiting sub-opening (61) and a valve seat limiting sub-opening (42), the connecting rod limiting sub-opening (61) is annularly arranged on the edge of the end of the connecting rod (6) close to the valve seat (4), the valve seat limiting sub-opening (42) is arranged on the side of the valve seat (4) away from the valve ball (12), and the connecting rod limiting sub-opening (61) is attached to the valve seat limiting sub-opening (42).

4. A globe valve according to claim 1, characterized in that: Valve ball pad sealing rings (11) are respectively arranged between the valve plug (7) and the valve ball pad (8) and between the valve seat (4) and the valve ball pad (8).

5. A globe valve according to claim 1, characterized in that: A connecting rod sealing ring (9) is arranged between the connecting rod (6) and the valve plug (7).

6. A globe valve according to claim 1, characterized in that: A plug seat sealing ring (10) is arranged between the valve plug (7) and the valve seat (4).

7. A globe valve according to claim 1, characterized in that: The rotation control piece includes a valve rod (1), the valve rod (1) is rotatably connected in the valve seat (4), the valve rod (1) is drivingly connected with the valve ball (12), a valve rod sealing ring (2) is arranged on the valve rod (1), and the valve rod sealing ring (2) is fixedly connected in the valve seat (4).

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