CN211231681U

CN211231681U - Ball valve rod

Info

Publication number: CN211231681U
Application number: CN201922256743.6U
Authority: CN
Inventors: 葛兵; 戴宏威
Original assignee: Zhejiang Hualong Jushui Hvac Technology Co ltd
Current assignee: Zhejiang Valogin Technology Co ltd
Priority date: 2019-12-17
Filing date: 2019-12-17
Publication date: 2020-08-11
Anticipated expiration: 2029-12-17

Abstract

The utility model provides a ball valve rod belongs to valve manufacturing technical field. It has solved the problem that rocks appears easily when current valve rod and valve body cooperation. This ball valve rod includes the body of rod, the upper end of the body of rod has grafting portion, the lower extreme of the body of rod has screens portion, the upper end of the body of rod has radial boss, assembly step has in the valve body, when the body of rod is in the valve body, and this radial boss axial supports and prevents the downward drunkenness of body of rod axial on the assembly step of valve body, be provided with between radial boss and the valve body when the rotatory valve body that makes of the body of rod is in the open mode, can prevent the stop device of body of rod axial rebound, be provided with the supercharging device that can increase screens connecting force when being connected with the case screens in the screens portion of screens. The utility model discloses the body of rod and valve body rotate to be connected and do not have axial float and axial runout wearing and tearing, and structural stability is high, and sealing performance is good, is difficult to lead to the condition such as internal leakage of valve to take place long service life.

Description

Ball valve rod

Technical Field

The utility model belongs to the technical field of the valve is made, a ball valve rod is related to.

Background

Ball valves are valves in which a ball core is driven by a rod body to rotate around the axis of the rod body, are mainly used for cutting off or connecting media in a pipeline, can also be used for regulating and controlling fluid, and are widely applied to various control pipelines.

When the common ball valve is used, when the external temperature is lower, namely the common ball valve is used in a low-temperature icing state, the common ball valve can increase the volume due to the icing of water in the valve body, so that the ball valve bursts. For example, chinese patent literature discloses a ball valve [ application number: 201620192867.6, respectively; authorization notice number: CN205350423U ], which comprises a valve body, a valve core and a valve rod arranged in the valve body, wherein the inner end of the valve rod is fixedly connected with the valve core in the circumferential direction, the outer end of the valve rod extends out of the valve body and is fixedly connected with a handle, the valve body comprises a body and a valve cap which is connected with the body in a threaded manner, an upper ceramic sealing ring is embedded at the top of the valve core, the periphery of the upper ceramic sealing ring is an arc surface which is attached to the inner wall of the body and the inner wall of the valve cap, a first rubber pad and a first cylindrical rubber sleeve which is sleeved on the valve core are arranged at the top of the valve core, a first lower ceramic sealing ring is embedded at the step surface of the first rubber sleeve and the bottom of the valve core, the outer peripheral surface of the first lower ceramic sealing ring is an arc surface which is attached to the inner wall of the body and the inner wall of the valve cap, a second step which is provided with the lower ceramic sealing, the second rubber pad covers the step surface and the outer side surface of the second step.

In the structure, the valve rod and the valve body are in threaded fit with a certain gap, so that the valve rod and the valve body shake due to long-term opening and closing in the use process, the valve rod and the valve body are easily abraded, the sealing performance in the valve is further deteriorated, the situation of leakage in the valve body is easily caused, and the like; the sealing effect is poor, and the service life is short.

Disclosure of Invention

The utility model aims at the above-mentioned problem that exists among the prior art, provide a simple structure, the body of rod and valve body normal running fit position accurate, can prevent effectively that the body of rod and valve body axial from beating wearing and tearing, sealed effectual, long service life's ball valve rod.

The purpose of the utility model can be realized by the following technical proposal: a ball valve rod comprises a rod body which is arranged in the valve body in a penetrating way and is matched with the valve body in a sealing way, the upper end of the rod body is provided with an inserting part which is arranged in an upward protruding way in the axial direction, the inserting part extends out of the valve body and is used for connecting a handle, the lower end of the rod body is provided with a clamping part which is arranged in an axially downward protruding way and is used for clamping and connecting a valve core arranged in the valve body, it is characterized in that the upper end of the rod body is provided with a radial boss, an assembly step is arranged in the valve body, when the rod body is positioned in the valve body, the radial boss is axially abutted against the assembly step of the valve body to prevent the rod body from axially moving downwards, a limiting device which can prevent the rod body from axially jumping upwards when the rod body rotates to enable the valve body to be in an open state is arranged between the radial boss and the valve body, the clamping part is provided with a supercharging device which can increase the clamping connection acting force when in clamping connection with the valve core.

This ball valve rod is provided with stop device between radial boss and valve body to can prevent effectively through stop device that the body of rod axial is upwards beated, can effectively avoid the body of rod to beat the wearing and tearing that lead to on the valve body, be provided with supercharging device on screens portion, can make screens portion and case screens connection structure more stable through supercharging device, enable case and valve body position cooperation accuracy, structural stability is high, long service life.

In a foretell ball valve rod, stop device include spacing elastic component, radial boss on have and be the spacing groove one of radial setting, the inner wall of valve body on have a spacing groove two, spacing elastic component be in spacing groove one, it is relative at the notch of valve body internal rotation and the notch that makes spacing groove one and spacing groove two when the body of rod, and this spacing elastic component screens prevents body of rod axial rebound between spacing groove one, spacing groove two. The purpose of setting up like this makes the body of rod and the relative screens cooperation of valve body through elastic component in rotatory open mode, can prevent effectively that the case from being impacted by the medium in the valve body in open mode, makes the body of rod in the valve body axial runout and the body of rod wearing and tearing that lead to.

In the above ball valve rod, the limiting elastic component includes a limiting steel ball and a compression spring, the limiting steel ball and the compression spring are both located in the first limiting groove, and the compression spring is located at the bottom of the first limiting groove, and the compression spring elastically acts on the limiting steel ball to enable the limiting steel ball to have a movement trend of radially outward displacement. During actual manufacturing, one end of the compression spring is elastically abutted against the groove bottom of the first limiting groove, the other end of the compression spring is elastically abutted against the limiting steel ball, and the structural stability is high.

In an above-mentioned ball valve rod, the diameter of radial boss be greater than the diameter of the body of rod, first spacing groove be in the lower extreme position of radial boss and the radial distance of the last cell wall of this spacing groove is greater than the radial distance of the lower cell wall of spacing groove. The purpose that sets up like this makes things convenient for the body of rod axial assembly in the valve body, and this spacing steel ball supports through the last cell wall of spacing groove one and leans on can effectively prevent spacing steel ball landing when the assembly, convenient assembling.

In foretell ball valve rod, supercharging device including two support by the steel ball, screens portion on be provided with the pressure boost hole, the inside riveting of both ends tip in pressure boost hole in order to form the throat, two support by the steel ball all be in the pressure boost hole, two support to be provided with between the steel ball and support and lean on the spring, and these two support by the steel ball make under the elastic action who supports by the spring support and lean on in the throat that corresponds, support to lean on the throat that the steel ball part stretches out the correspondence be used for the increase with the screens connection effort of case. Through radial supporting of two supporting steel balls, the clamping acting force of the clamping portion and the valve element can be increased, and the structural stability is high.

In the above ball valve stem, two circular spring seats are further disposed in the pressure-increasing hole, one of the circular spring seats is located at one end of the abutting spring and axially abuts against one of the abutting steel balls, and the other circular spring seat is located at the other end of the abutting spring and axially abuts against the other abutting steel ball. The purpose of setting up like this is to enable two to lean on the steel ball and receive to lean on the elastic force of spring and evenly to lean on, and structural stability is high.

In foretell ball valve rod, the up end of radial boss on have a plane bearing, plane bearing cover establish in grafting portion, the upper end of valve body can dismantle and be connected with and be used for the body of rod to support to overlap on the valve body axially spacing, support to overlap and plane bearing axially support to cooperate. The purpose of this setting is to reduce radial boss and to support the cover axial and support the wearing and tearing, prevents to have the wearing and tearing clearance between radial boss and the support cover.

In foretell ball valve rod, the outer wall of the body of rod on the axial interval inlay and be equipped with a plurality of sealing washer, when the body of rod axial was worn to locate in the valve body, and this every sealing washer all seals the inner wall that acts on the valve body and makes the body of rod and the sealed cooperation of valve body. The sealing effectiveness of the rotary connection between the rod body and the valve body can be ensured, and the service life is long.

Compared with the prior art, the valve rod of the ball valve has the advantages that: the rod body is rotationally connected with the valve body, axial float and axial jumping abrasion do not exist, the structural stability is high, the sealing performance is good, leakage and other conditions in the valve body are not easy to occur, and the service life is long.

Drawings

Fig. 1 is a schematic sectional view of the valve stem of the ball valve.

Fig. 2 is an enlarged schematic view of a portion a in fig. 1.

In the figure, 1, a valve body; 2. a rod body; 3. a plug-in part; 4. a clamping part; 5. a radial boss; 6. limiting steel balls; 7. a compression spring; 8. abutting against the steel ball; 9. a necking part; 10. an abutment spring; 11. a circular spring seat; 12. a flat bearing; 13. an abutting sleeve; 14. and (5) sealing rings.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1 and 2, the ball valve rod mainly comprises a rod body 2 penetrating through a valve body 1 and in sealing fit with the valve body 1, wherein an inserting part 3 protruding upwards in the axial direction is arranged at the upper end of the rod body 2, the inserting part 3 extends out of the valve body 1 and is used for connecting a handle, a clamping part 4 protruding downwards in the axial direction is arranged at the lower end of the rod body 2, the clamping part 4 is used for clamping and connecting a valve core arranged in the valve body 1, a radial boss 5 is arranged at the upper end of the rod body 2, an assembly step is arranged in the valve body 1, when the rod body 2 is positioned in the valve body 1, the radial boss 5 is axially abutted against the assembly step of the valve body 1 to prevent the rod body 2 from moving downwards in the axial direction, and a limiting device capable of preventing the rod body 2 from moving upwards in the axial direction is arranged between the radial boss 5 and the valve body; during actual manufacturing, the specific implementation mode of the limiting device is as follows: mainly constitute by spacing elastic component, have the spacing groove one that is radial setting on the radial boss 5, have spacing groove two on the inner wall of valve body 1, spacing elastic component is in spacing groove one, and the notch that just makes spacing groove one is relative in the notch of the body of rod 2 at valve body 1 internal rotation and spacing groove two, and this spacing elastic component screens prevents body of rod 2 axial rebound between spacing groove one, spacing groove two. When actually designing, this spacing elastic component's concrete structure is: the steel ball stopper mainly comprises a limiting steel ball 6 and a compression spring 7, wherein the limiting steel ball 6 and the compression spring 7 are both positioned in a first limiting groove, the compression spring 7 is positioned at the bottom of the first limiting groove, and the compression spring 7 elastically acts on the limiting steel ball 6 to enable the limiting steel ball 6 to have a movement trend of radially outward displacement. In practical application, the diameter of the radial boss 5 is larger than that of the rod body 2, the first limiting groove is positioned at the lower end of the radial boss 5, and the radial distance of the upper groove wall of the first limiting groove is larger than that of the lower groove wall of the first limiting groove.

The clamping part 4 is provided with a supercharging device which can increase the clamping connection acting force when the supercharging device is in clamping connection with the valve core. In actual manufacturing, the concrete implementation mode of the supercharging device is as follows: the clamping part 4 is provided with a pressurizing hole, the end parts of two ends of the pressurizing hole are riveted inwards to form a necking part 9, the two abutting steel balls 8 are positioned in the pressurizing hole, an abutting spring 10 is arranged between the two abutting steel balls 8, the two abutting steel balls 8 clamp the abutting steel balls 8 in the corresponding necking parts 9 under the elastic action of the abutting spring 10, and the abutting steel balls 8 partially extend out of the corresponding necking parts 9 to increase the clamping connection acting force with the valve core; specifically speaking: two circular spring seats 11 are further arranged in the pressurizing hole, one circular spring seat 11 is located at one end of the abutting spring 10 and axially abuts against one abutting steel ball 8, and the other circular spring seat 11 is located at the other end of the abutting spring 10 and axially abuts against the other abutting steel ball 8.

During actual manufacturing, the upper end face of the radial boss 5 is provided with a plane bearing 12, the plane bearing 12 is sleeved on the insertion part 3, the upper end of the valve body 1 is detachably connected with an abutting sleeve 13 for axially limiting the rod body 2 on the valve body 1, and the abutting sleeve 13 and the plane bearing 12 are axially abutted and matched.

In practical application, a plurality of sealing rings 14 are axially embedded on the outer wall of the rod body 2 at intervals, and when the rod body 2 axially penetrates through the valve body 1, each sealing ring 14 is hermetically acted on the inner wall of the valve body 1 to enable the rod body 2 to be hermetically matched with the valve body 1.

Those not described in detail in this specification are within the skill of the art. The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. The ball valve rod comprises a rod body (2) which is arranged in a valve body (1) in a penetrating mode and is in sealing fit with the valve body (1), wherein an inserting part (3) which protrudes upwards in the axial direction is arranged at the upper end of the rod body (2), the inserting part (3) extends out of the valve body (1) and is used for connecting a handle, a clamping part (4) which protrudes downwards in the axial direction is arranged at the lower end of the rod body (2), the clamping part (4) is used for being connected with a valve core clamping part arranged in the valve body (1) in a clamping mode, the ball valve rod is characterized in that a radial boss (5) is arranged at the upper end of the rod body (2), an assembly step is arranged in the valve body (1), when the rod body (2) is arranged in the valve body (1), the radial boss (5) is axially abutted against the assembly step of the valve body (1) to prevent the rod body (2) from moving downwards in the axial direction, and when the valve body (1) is in an open state due to the rotation of the rod, the limiting device can prevent the rod body (2) from axially jumping upwards, and the clamping part (4) is provided with a supercharging device which can increase clamping connection acting force when being in clamping connection with the valve core.

2. The ball valve stem according to claim 1, wherein the limiting device comprises a limiting elastic component, the radial boss (5) is provided with a first limiting groove which is radially arranged, the inner wall of the valve body (1) is provided with a second limiting groove, the limiting elastic component is positioned in the first limiting groove, when the rod body (2) rotates in the valve body (1) and the notch of the first limiting groove is opposite to the notch of the second limiting groove, and the limiting elastic component is clamped between the first limiting groove and the second limiting groove to prevent the rod body (2) from axially jumping upwards.

3. The ball valve rod of claim 2, wherein the limiting elastic component comprises a limiting steel ball (6) and a compression spring (7), the limiting steel ball (6) and the compression spring (7) are both positioned in the first limiting groove, the compression spring (7) is positioned at the bottom of the first limiting groove, and the compression spring (7) elastically acts on the limiting steel ball (6) to enable the limiting steel ball (6) to have a moving trend of radially outward displacement.

4. A valve stem for a ball valve according to claim 3, wherein the diameter of the radial projection (5) is larger than the diameter of the stem body (2), the first limiting groove is located at the lower end of the radial projection (5) and the radial distance of the upper groove wall of the first limiting groove is larger than the radial distance of the lower groove wall of the first limiting groove.

5. The ball valve rod of claim 4, wherein the pressurizing device comprises two abutting steel balls (8), the clamping portion (4) is provided with a pressurizing hole, the end portions of the two ends of the pressurizing hole are riveted inwards to form a necking portion (9), the two abutting steel balls (8) are located in the pressurizing hole, an abutting spring (10) is arranged between the two abutting steel balls (8), the abutting steel balls (8) are clamped in the corresponding necking portions (9) under the elastic action of the abutting spring (10), and the abutting steel balls (8) partially extend out of the corresponding necking portions (9) to increase the clamping connection acting force with the valve core.

6. A ball valve stem according to claim 5, wherein two circular spring seats (11) are further arranged in the pressurizing hole, one circular spring seat (11) is arranged at one end of the abutting spring (10) and axially abuts against one abutting steel ball (8), and the other circular spring seat (11) is arranged at the other end of the abutting spring (10) and axially abuts against the other abutting steel ball (8).

7. A ball valve stem according to claim 6, wherein the upper end surface of the radial boss (5) is provided with a plane bearing (12), the plane bearing (12) is sleeved on the insertion part (3), the upper end of the valve body (1) is detachably connected with an abutting sleeve (13) for axially limiting the rod body (2) on the valve body (1), and the abutting sleeve (13) and the plane bearing (12) are axially abutted and matched.

8. A ball valve rod according to claim 7, characterized in that a plurality of sealing rings (14) are embedded on the outer wall of the rod body (2) at intervals in the axial direction, when the rod body (2) axially penetrates through the valve body (1), and each sealing ring (14) acts on the inner wall of the valve body (1) in a sealing manner to enable the rod body (2) to be in sealing fit with the valve body (1).