Ball valve

Abstract

The ball valve comprises a main body, the main body is provided with a main cavity, a first connector and a second connector, a valve element and a valve seat are arranged in the main cavity, a control notch is formed in the surface of the valve element, the valve element is provided with a flow channel which is controlled to rotate through a valve rod so as to adjust connection and disconnection of the first connector and the second connector, and the main body is further provided with a valve rod opening connected with the main cavity. The valve rod opening is provided with a rod sleeve connected with the main body, and the end face position of one end, facing the main body, of the rod sleeve is provided with limiting blocks which are arranged in a fan shape in the circumferential direction of the rod sleeve; a retaining shoulder with the diameter larger than that of the valve rod is arranged at one end of the valve rod, and a meshing part matched with the control notch to drive the valve element to rotate and a limiting piece matched with the limiting block to limit the rotating angle range of the valve rod are arranged on the face, away from the valve rod, of the retaining shoulder. The valve rod is installed from the end, facing the main body, of the rod sleeve, and the blocking shoulder abuts against the end face of the rod sleeve. According to the utility model, the difficulty of the production process can be effectively reduced, the production process is greatly simplified, and the size precision is high.

Description

Technical Field

[0001] The utility model relates to the field of valves, in particular to a ball valve. Background Art

[0002] The valve core of the ball valve is driven by the valve stem to rotate 90 degrees to achieve conduction between the inlet and outlet. In order to ensure the consistency of the opening and closing angles of the valve core when it rotates, a limit block must be set outside the main body, and then cooperate with the limit piece of the handle on the valve stem to realize the control of the rotation angle, which indirectly limits the design of the handle and leads to problems such as poor versatility of the handle.

[0003] At the same time, since the processing of limit blocks often needs to be formed by stamping or other methods (whether external or internal), it is highly dependent on equipment and it is difficult to ensure dimensional accuracy. Utility Model Content

[0004] Based on the above problems, the purpose of the utility model is to provide a ball valve which can effectively reduce the difficulty of the production process, greatly simplify the production process, and has high dimensional accuracy.

[0005] In view of the above problems, the following technical solutions are provided: a ball valve comprises a main body, the main body is provided with a main cavity and interface 1 and interface 2 connected to the main cavity, a valve core and a valve seat matched with the valve core are provided in the main cavity, a control groove is provided on the surface of the valve core, the valve core is provided with a flow channel which is controlled to rotate by a valve stem to adjust the on and off of interface 1 and interface 2, the main body is also provided with a valve stem opening connected to the main cavity and arranged at an angle to interface 1 or interface 2, the valve stem opening is provided with a rod sleeve connected to the main body, the end face position of the rod sleeve facing the main body is arranged in a fan shape along the circumferential direction of the rod sleeve; a shoulder with a diameter larger than the diameter of the valve stem is provided at one end of the valve stem, a meshing portion matched with the control groove to drive the valve core to rotate is provided on a side of the shoulder away from the valve stem, and a limit piece matched with the limit block to limit the rotation angle range of the valve stem, the valve stem is installed from the end of the rod sleeve toward the main body so that the shoulder is abutted against the end face of the rod sleeve.

[0006] The utility model is further configured such that the projection of the limit block in the circumferential direction of the rod sleeve is fan-shaped.

[0007] The utility model is further configured that the limit block and the limit member are both two pieces, which are arranged 180 degrees apart from each other.

[0008] The utility model is further configured that the rod sleeve is welded and fixed to the valve stem opening; the valve stem opening is provided with a stepped hole, and the end face of the rod sleeve is located in the stepped hole for concentric positioning.

[0009] The utility model is further configured that the interface 1 is provided with a joint 1 welded or threaded along the interface; and the interface 2 is provided with a joint 2 welded or threaded along the interface.

[0010] The utility model is further configured that a countersunk hole is provided at one end of the rod sleeve facing the main body, and the end surface of the shoulder abuts against the bottom of the countersunk hole.

[0011] The utility model is further configured that the outer wall of the valve stem is provided with a sealing ring which is sealingly matched with the inner wall of the stem sleeve.

[0012] The utility model is further configured such that the central axes of interface one and interface two are arranged at 90 degrees or 180 degrees apart from each other; when the central axes of interface one and interface two are cross-arranged at 90 degrees, the axis of the valve stem mouth is concentric with the axis of interface one or interface two; when the central axes of interface one and interface two are arranged at 180 degrees apart from each other, the axis of the valve stem mouth is cross-arranged at 90 degrees relative to the central axes of interface one and interface two.

[0013] The utility model is further configured such that the rotation angle limited between the limit block and the limit member is 90 degrees.

[0014] The utility model is further configured that the exposed end of the valve stem is provided with a knob.

[0015] Beneficial effects of the utility model:

[0016] 1. The position of the limit block is transferred to the end face of the rod sleeve, which can avoid the problems of low dimensional accuracy and high equipment dependence caused by processing by stamping and other methods. Only one turning and milling compound machine tool is needed to complete the parts that require multiple clamping processes such as punching and lathes to produce;

[0017] 2. The rod sleeve is turned as a whole by a turning-milling compound machine tool, and is turned at its end face position at the clamping station to form a cylindrical structure, and then the cylindrical structure is milled to obtain a limit block integrally connected to the rod sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0019] Figure 2 It is a schematic diagram of the fully cutaway three-dimensional structure of interface 1 and interface 2 of the utility model in the cut-off state.

[0020] Figure 3 This is a first full-section three-dimensional structural schematic diagram of the conductive state of interface 1 and interface 2 of the utility model.

[0021] Figure 4 This is a second full-section three-dimensional structural schematic diagram of the conductive state of interface 1 and interface 2 of the utility model.

[0022] Figure 5 It is a schematic diagram of the explosion three-dimensional structure of the utility model.

[0023] Figure 6 It is a schematic diagram of the exploded full-section three-dimensional structure of the utility model.

[0024] Figure 7 It is a structural schematic diagram of the rod sleeve of the utility model in the turning completion state.

[0025] Figure 8 This is a schematic structural diagram of the limit block of the utility model in the milling completion state.

[0026] The meaning of the numbers in the figure are as follows: 10-main body; 11-main cavity; 12-interface 1; 13-interface 2; 14-valve stem opening; 141-stepped hole; 20-valve core; 21-control slot; 22-flow channel; 30-valve seat; 40-valve stem; 41-shoulder; 42-engaging part; 43-limiting piece; 44-sealing ring; 50-stem sleeve; 51-limiting block; 52-cylindrical structure; 53-countersunk hole; 60-connector 1; 70-connector 2; 80-knob. DETAILED DESCRIPTION

[0027] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0028] refer to Figures 1 to 8 ,like Figures 1 to 8 The ball valve shown in the figure comprises a main body 10, the main body 10 is provided with a main cavity 11 and an interface 12 and an interface 2 13 connected to the main cavity 11, a valve core 20 and a valve seat 30 adapted to the valve core 20 are provided in the main cavity 11, a control notch 21 is provided on the surface of the valve core 20, the valve core 20 is provided with a flow channel 22 controlled by a valve stem 40 to rotate to adjust the opening and closing of the interface 1 12 and the interface 2 13, the main body 10 is also provided with a valve stem port 14 connected to the main cavity 11 and arranged at an angle to the interface 1 12 or the interface 2 13, the valve stem port 14 is provided with a valve notch 21 and ... 10 is connected to a rod sleeve 50, and the end surface position of the rod sleeve 50 facing the main body 10 is provided with a limit block 51 arranged in a fan shape along the circumferential direction of the rod sleeve 50; one end of the valve stem 40 is provided with a shoulder 41 with a diameter larger than the diameter of the valve stem 40, and the side of the shoulder 41 away from the valve stem 40 is provided with an engaging portion 42 adapted to the control notch 21 to drive the valve core 20 to rotate, and a limit member 43 adapted to the limit block 51 to limit the rotation angle range of the valve stem 40, and the valve stem 40 is installed from the end of the rod sleeve 50 toward the main body 10 so that the shoulder 41 is abutted against the end surface of the rod sleeve 50.

[0029] In the above structure, the position of the limit block 51 is transferred to the end face position of the rod sleeve 50, which can avoid the problems of low dimensional accuracy and high equipment dependence caused by processing methods such as stamping and forming. Only one turning and milling compound machine tool is needed to complete the production of parts that require multiple clamping processes such as punching and lathes.

[0030] In this embodiment, the projection of the limiting block 51 in the circumferential direction of the rod sleeve 50 is fan-shaped.

[0031] In the above structure, the rod sleeve 50 is integrally formed by turning by a turning-milling compound machine tool, and is turned at the end surface position at the clamping station to form a cylindrical structure 52 (refer to Figure 7 ), and then the cylindrical structure 52 is milled to obtain a limit block 51 connected to the rod sleeve 50 (refer to Figure 8 ).

[0032] In this embodiment, the limiting block 51 and the limiting member 43 are both two pieces, which are arranged 180 degrees apart from each other.

[0033] In the above structure, the 180-degree arrangement can effectively improve the overall stability and durability.

[0034] In this embodiment, the rod sleeve 50 is fixed to the valve stem opening 14 by welding; the valve stem opening 14 is provided with a stepped hole 141, and the end surface of the rod sleeve 50 is located in the stepped hole 141 for concentric positioning.

[0035] In the above structure, it is used as a positioning reference for welding.

[0036] In this embodiment, the interface 1 12 is provided with a joint 1 60 welded or threadedly connected along the interface; and the interface 2 13 is provided with a joint 2 70 welded or threadedly connected along the interface.

[0037] In the above structure, the valve seat 30 is located on both sides of the valve core 20, and the interface 12 and the connector 1 60 are preferably threadedly connected and abut against the valve seat 30 to achieve sealing between the valve seat 30 and the valve core 20.

[0038] In this embodiment, a countersunk hole 53 is formed at one end of the rod sleeve 50 facing the main body 10 , and the end surface of the stop shoulder 41 abuts against the bottom of the countersunk hole 53 .

[0039] In the above structure, by arranging the counterbore 53, the axial dimension can be effectively reduced, making the structure more compact as a whole.

[0040] In this embodiment, the outer wall of the valve stem 40 is provided with a sealing ring 44 which is sealed with the inner wall of the stem sleeve 50 .

[0041] In the above structure, water leakage can be avoided.

[0042] In this embodiment, the central axes of interface 12 and interface 2 13 are arranged at 90 degrees or 180 degrees apart from each other; when the central axes of interface 12 and interface 2 13 are cross-arranged at 90 degrees, the axis of the valve stem port 14 is concentric with the axis of interface 1 12 or interface 2 13; when the central axes of interface 1 12 and interface 2 13 are arranged at 180 degrees apart from each other, the axis of the valve stem port 14 is cross-arranged at 90 degrees relative to the central axes of interface 1 12 and interface 2 13.

[0043] In the above structure, the central axes of the interface 1 12 and the interface 2 13 are spaced 90 degrees apart from each other; the central axis of the interface 2 13 and the axis of the valve stem port 14 are concentric with each other.

[0044] In this embodiment, the rotation angle limited by the limiting block 51 and the limiting member 43 is 90 degrees.

[0045] In this embodiment, a knob 80 is provided at the exposed end of the valve stem 40 .

[0046] In the above structure, a square knob is provided at the exposed end of the valve stem 40, and the knob 80 is fixed to the valve stem 40 by gluing or screws.

[0047] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications of the above assumptions should also be regarded as the protection scope of the present invention.

Claims

1. A ball valve, comprising a main body, the main body is provided with a main cavity and a first interface and a second interface connected to the main cavity, a valve core and a valve seat adapted to the valve core are provided in the main cavity, a control notch is provided on the surface of the valve core, and the valve core is provided with a flow channel that is controlled to rotate by a valve stem to adjust the opening and closing of the first interface and the second interface, characterized in that: The main body is also provided with a valve stem opening connected to the main cavity and arranged at an angle to interface one or interface two, the valve stem opening is provided with a rod sleeve connected to the main body, and the end face position of the rod sleeve facing the main body is provided with a limit block arranged in a fan shape along the circumferential direction of the rod sleeve; one end of the valve stem is provided with a shoulder with a diameter larger than the diameter of the valve stem, and the side of the shoulder away from the valve stem is provided with an engaging portion adapted to the control groove to drive the valve core to rotate, and a limit piece adapted to the limit block to limit the rotation angle range of the valve stem, and the valve stem is installed from the end of the rod sleeve toward the main body so that the shoulder is abutted against the end face of the rod sleeve.

2. A ball valve according to claim 1, characterized in that: The projection of the limit block in the circumferential direction of the rod sleeve is fan-shaped.

3. A ball valve according to claim 1 or 2, characterized in that: The limit block and the limit member are both two pieces, which are arranged 180 degrees apart from each other.

4. A ball valve according to claim 1, characterized in that: The rod sleeve is welded and fixed to the valve stem opening; the valve stem opening is provided with a stepped hole, and the end face of the rod sleeve is located in the stepped hole for concentric positioning.

5. A ball valve according to claim 1, characterized in that: The interface 1 is provided with a joint 1 which is welded or threaded along the interface; and the interface 2 is provided with a joint 2 which is welded or threaded along the interface.

6. A ball valve according to claim 1, characterized in that: A countersunk hole is arranged at one end of the rod sleeve facing the main body, and the end surface of the shoulder abuts against the bottom of the countersunk hole.

7. A ball valve according to claim 1, characterized in that: The outer wall of the valve stem is provided with a sealing ring which is sealed with the inner wall of the stem sleeve.

8. A ball valve according to claim 1, characterized in that: The central axes of interface one and interface two are arranged at 90 degrees or 180 degrees apart from each other; when the central axes of interface one and interface two are arranged cross-arranged at 90 degrees, the axis of the valve stem mouth is concentric with the axis of interface one or interface two; when the central axes of interface one and interface two are arranged 180 degrees apart from each other, the axis of the valve stem mouth is arranged cross-arranged at 90 degrees relative to the central axes of interface one and interface two.

9. A ball valve according to claim 1, characterized in that: The rotation angle limited between the limiting block and the limiting member is 90 degrees.

10. A ball valve according to claim 1, characterized in that: The exposed end of the valve stem is provided with a knob.

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