Small-bore high-pressure ball valve

Abstract

The utility model discloses a small caliber high pressure ball valve relates to the technical field of ball valve, the utility model discloses a valve body, the inside fixedly connected with valve seat of valve body, the inside rotation cooperation of valve seat has the valve ball of being suitable for valve body, the outer wall of valve body is provided with the valve cover, and the valve body is inserted with a plurality of studs between the valve cover, and the nut is connected with the valve cover between the stud and is screwed, and the bottom of valve body is connected with lower valve rod, the utility model discloses the lower valve rod is screwed and is connected through the lower valve rod, and the lower valve rod is connected with the valve body through the bolt, thereby avoiding the interference of bolt and stud, improve the performance of valve body, in addition, the plurality of O -ring gasket of setting up in the valve body inside makes the packing box of being set up on the outside of upper valve rod of traditional valve body can be saved, reduces the leakage point between packing box and valve body, effectively improves the sealing property of valve body, and the arc notch of being seted up at the bottom of upper valve rod makes the upper valve rod and valve ball connection close -fit place more closely, further improves the sealing property of valve body.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of ball valve, especially a small caliber high pressure ball valve. BACKGROUND

[0002] The valve is used for opening and closing the pipeline or adjusting the pipeline medium flow. Therefore, the mechanical strength of the valve body is required to be high, the rotating part is required to be flexible, and the sealing part is required to be tight and durable.

[0003] The current high pressure ball valve uses the packing box, so that the leakage point between the upper valve rod and the packing box is increased, thereby reducing the sealing property of the valve body, and the lower valve rod is connected with the valve body by the bolt, so that the bolt and the stud for fixing the valve cover are easy to interfere, thereby affecting the performance of the valve body. Therefore, the small caliber high pressure ball valve is provided to solve the above problems. CONTENT OF THE UTILITY MODEL

[0004] The utility model discloses a small caliber high pressure ball valve, through the lower valve rod lower wear and the lower valve rod adopts the thread connection, spares the lower valve rod through the bolt and the valve body connection, thereby avoiding the interference of the bolt and the stud, improve the performance of the valve body, in addition, the multiple O-shaped gaskets arranged in the valve body, so that the packing box arranged on the outer side of the upper valve rod of the traditional valve body can be omitted, the leakage point between the packing box and the valve body is reduced, the sealing property of the valve body is effectively improved, and the arc-shaped notch formed in the bottom end of the upper valve rod makes the connection between the upper valve rod and the valve ball more close, and the sealing property of the valve body is further improved, so that the problem that the packing box used on the existing high pressure ball valve makes the leakage point between the upper valve rod and the packing box increase, thereby reducing the sealing property of the valve body, and the lower valve rod is connected with the valve body by the bolt, so that the bolt and the stud for fixing the valve cover are easy to interfere, thereby affecting the performance of the valve body is solved.

[0005] To solve the above technical problems, the utility model is realized by the following technical schemes:

[0006] The utility model discloses a small caliber high pressure ball valve, including the valve body, the inside fixed connection of valve body has the valve seat, the inside rotation cooperation of valve seat has the valve ball with valve body is adapted, the outer wall of valve body is provided with the valve cover, the valve cover is inserted between the valve body and is provided with a plurality of studs, the nut is connected in the screw thread between the stud and the valve cover, the bottom of valve body is connected with lower valve rod, the end of lower valve rod is rotationally cooperated with valve ball, the top of valve body is provided with valve rod groove, the outer circumferential side of valve ball installs the upper valve rod and is slidably connected with valve rod groove, the inner circumferential side of valve rod groove is fixedly connected with a plurality of O-shaped packing rings, and the O-shaped packing ring is in contact with the upper valve rod.

[0007] The utility model further sets up, the bottom of upper valve rod is provided with the arc-shaped notch that is adapted with valve ball.

[0008] The utility model further sets up, the inner peripheral side of valve stem groove is equipped with a plurality of annular groove of adapting with O ring, every O ring is made of material of elasticity and having sealing property.

[0009] The utility model further sets up, the bottom of valve body is equipped with recess of adapting with lower valve stem bottom end, the recess is fixedly connected with sealing washer of being covered on the outer wall of lower valve stem.

[0010] The utility model further sets up, the circumferential surface of lower valve stem is equipped with thread of adapting with valve ball.

[0011] The utility model further sets up, the circumferential surface of upper valve stem is fixedly connected with handle, and the outer wall of handle is covered with protective sleeve.

[0012] The utility model has following beneficial effects:

[0013] The utility model discloses a valve ball is rotated with the upper valve stem is rotated, when the valve ball is coincident with the valve body, then the valve body is opened, when the valve ball interferes with the valve body, then the valve body is closed, through lower valve stem and lower valve stem are connected with thread, spare lower valve stem and connect with the valve body through bolt, thereby avoiding bolt and stud interference, improve the performance of valve body, in addition, the multiple O ring of setting up inside the valve body, make spare the packing box of setting up on the upper valve stem outside traditional valve body, reduce the leakage point between packing box and valve body, effectively improve the sealing property of valve body, and the arc-shaped gap of setting up in the bottom end of upper valve stem, make upper valve stem and valve ball connection close place more closely, further improve the sealing property of valve body.

[0014] Of course, any product implementing the utility model does not necessarily need to achieve all the advantages described above. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to make the technical scheme of the embodiments of the utility model clearer, the following will briefly introduce the drawings needed to be used in the embodiment description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without paying creative labor.

[0016] Fig. 1 It is a kind of small-bore high-pressure ball valve structure schematic view.

[0017] Fig. 2 It is the structure schematic view of the connecting place between lower valve stem and valve body in the utility model.

[0018] Fig. 3This is a schematic diagram of the threaded connection between the lower valve stem and the valve body in this utility model.

[0019] The attached diagram lists the components represented by each number as follows:

[0020] 1-Valve body, 2-Valve seat, 3-Valve ball, 4-Valve cover, 5-Arc-shaped notch, 6-O-ring, 7-Stud, 8-Nut, 9-Lower valve stem, 10-Upper valve stem, 11-Handle, 12-Valve stem groove. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0022] For specific implementation details, please refer to [link / reference]. Figs. 1-3 This utility model relates to a small-diameter high-pressure ball valve, comprising a valve body 1; a valve seat 2 is fixedly connected inside the valve body 1, and a valve ball 3 adapted to the valve body 1 is rotatably fitted inside the valve seat 2; a valve cover 4 is provided on the outer wall of the valve body 1; a plurality of studs 7 are inserted between the valve body 1 and the valve cover 4; nuts 8 are threadedly connected between the studs 7 and the valve cover 4; a lower valve stem 9 is threadedly connected to the bottom of the valve body 1, and the end of the lower valve stem 9 is rotatably fitted with the valve ball 3; a valve stem groove 12 is provided on the top of the valve body 1; an upper valve stem 10 is installed on the outer peripheral side of the valve ball 3, extending to the outside of the valve cover 4 and slidably fitted with the valve stem groove 12; and the inner peripheral side of the valve stem groove 12 is fixedly connected to... Several O-rings 6 are connected, and the O-rings 6 abut against the upper valve stem 10. The bottom end of the upper valve stem 10 has an arc-shaped notch 5 that matches the valve ball 3. The inner circumferential side of the valve stem groove 12 has several annular grooves that match the O-rings 6. Each O-ring 6 is made of an elastic and sealing material. The bottom of the valve body 1 has a groove that matches the bottom end of the lower valve stem 9. A sealing gasket that fits on the outer wall of the lower valve stem 9 is fixedly connected inside the groove. The circumferential side of the lower valve stem 9 has threads that match the valve ball 3. The circumferential side of the upper valve stem 10 is fixedly connected to a handle 11, and the outer wall of the handle 11 is covered with a protective sleeve.

[0023] The operation process of this embodiment is as follows: By rotating the upper valve stem 10, the upper valve stem 10 drives the valve ball 3 to rotate. When the valve ball 3 coincides with the valve body 1, the valve body 1 is opened. When the valve ball 3 interferes with the valve body 1, the valve body 1 is closed. By passing the lower valve stem 9 downward and using a threaded connection, the lower valve stem 9 is not connected to the valve body 1 by bolts, thereby avoiding interference between the bolts and studs 9. In addition, the multiple O-rings provided inside the valve body 1 eliminate the need for the stuffing box (the stuffing box is existing technology and will not be described here) that is traditionally provided on the outside of the upper valve stem 10 on the valve body 1. This reduces the leakage points between the stuffing box and the valve body 1, effectively improving the sealing performance of the valve body 1. The arc-shaped notch 10 opened at the bottom of the upper valve stem 10 makes the connection between the upper valve stem 10 and the valve ball 3 tighter, further improving the sealing performance of the valve body 1.

[0024] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0025] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A small-diameter high-pressure ball valve, comprising a valve body (1); characterized in that: A valve seat (2) is fixedly connected inside the valve body (1). A valve ball (3) that is compatible with the valve body (1) is rotatably fitted inside the valve seat (2). A valve cover (4) is provided on the outer wall of the valve body (1). Several studs (7) are inserted between the valve body (1) and the valve cover (4). Nuts (8) are threaded between the studs (7) and the valve cover (4). A lower valve stem (9) is threaded to the bottom of the valve body (1). The end of the lower valve stem (9) is rotatably engaged with the valve ball (3). A valve stem groove (12) is provided on the top of the valve body (1). An upper valve stem (10) is installed on the outer peripheral side of the valve ball (3) extending to the outside of the valve cover (4) and slidingly engaged with the valve stem groove (12). Several O-rings (6) are fixedly connected to the inner peripheral side of the valve stem groove (12). The O-rings (6) abut against the upper valve stem (10).

2. The small-diameter high-pressure ball valve according to claim 1, characterized in that, The bottom end of the upper valve stem (10) is provided with an arc-shaped notch (5) that is compatible with the valve ball (3).

3. A small-diameter high-pressure ball valve according to claim 2, characterized in that, The inner circumferential side of the valve stem groove (12) is provided with several annular grooves that are adapted to the O-rings (6), and each O-ring (6) is made of an elastic and sealing material.

4. A small-diameter high-pressure ball valve according to claim 3, characterized in that, The bottom of the valve body (1) is provided with a groove that matches the bottom end of the lower valve stem (9), and a sealing gasket that is fitted on the outer wall of the lower valve stem (9) is fixedly connected inside the groove.

5. A small-diameter high-pressure ball valve according to claim 4, characterized in that, The lower valve stem (9) has a thread on its circumferential side that is compatible with the valve ball (3).

6. A small-diameter high-pressure ball valve according to claim 5, characterized in that, A handle (11) is fixedly connected to the circumferential side of the upper valve stem (10), and a protective sleeve is provided on the outer wall of the handle (11).

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