CN215806456U

CN215806456U - Ball valve

Info

Publication number: CN215806456U
Application number: CN202122140873.0U
Authority: CN
Inventors: 林俊穆; 卓淑珍; 陈永庆; 邓辉强; 刘学芳
Original assignee: Felp Valve Technology Co ltd
Current assignee: Felp Valve Technology Co ltd
Priority date: 2021-09-06
Filing date: 2021-09-06
Publication date: 2022-02-11
Anticipated expiration: 2031-09-06

Abstract

The utility model discloses a ball valve, which adopts the technical scheme that the ball valve comprises a valve body, a valve cover covering the valve body and a valve rod penetrating through the valve cover and partially extending into the valve body, wherein a circular ring is coaxially arranged on a rod body of the valve rod extending into the valve body, an elastic sealing ring is arranged on the end surface of the circular ring facing the outside of the valve body, a sleeve in clearance fit with the valve rod and a gland used for pressing the sleeve downwards and fixedly connected with the valve cover are sleeved outside the valve rod, a sealing groove is arranged on the end surface of the sleeve partially extending out of the valve cover and extending into the valve body, the height of the sealing groove is smaller than that of the elastic sealing ring, the groove bottom of the sealing groove is abutted against the elastic sealing ring, a filler is filled in a gap between the sleeve and the valve body, and a filler cover which is used for compacting the filler and is in clearance fit with the sleeve is fixedly connected on the valve cover, so that liquid in the prior art can leak from the joint of the valve cover and the valve body and the gap between the valve rod and the filler, the valve rod is difficult to rotate relative to the valve body.

Description

Ball valve

Technical Field

The utility model relates to the field of ball valves, in particular to a ball valve.

Background

The valve cover of the existing ball valve is connected with the valve body by bolts and nuts to form sealing. However, the sealing cavity has two leakage points, one is the joint of the valve cover and the valve body, and the other is the gap between the valve rod and the valve body, in the prior art, the filling material is filled between the valve rod and the valve body and then is combined with the filling material cover to compact the filling material so as to ensure that the outer wall of the valve rod and the inner wall of the valve body are tightly attached to the filling material, so that the two leakage points can be eliminated, but the defects still exist.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model aims to provide a ball valve which is convenient for the rotation of a valve rod and has low leakage.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a ball valve, includes valve body, lid fit the valve gap on the valve body and runs through the valve gap and the local valve rod that stretches into in the valve body, the valve rod stretches into coaxial ring that is provided with on the pole body in the valve body, the ring is provided with the elastic sealing circle towards being provided with on the terminal surface outside the valve body, the valve rod overcoat be equipped with rather than clearance fit's sleeve with be used for down pressing the sleeve and with valve gap fixed connection's gland, the sleeve part is worn out outside the valve gap and has been seted up the seal groove on its terminal surface that stretches into in the valve body, the tank bottom that highly is less than the elastic sealing circle of seal groove and seal groove contradicts with the elastic sealing circle, the space packing between sleeve and the valve body, fixedly connected with is used for the compaction filler and with sleeve clearance fit's gland, when the relative valve body of valve rod rotates, the relative seal groove of elastic sealing circle rotates.

As a further improvement of the utility model, the sleeve is provided with a liquid injection channel and a liquid tank positioned on the bottom of the sealing groove, the liquid tank is annular and positioned above the elastic sealing ring, the width of the liquid tank is smaller than that of the elastic sealing ring, one end of the liquid injection channel is communicated with the liquid tank, the other end of the liquid injection channel extends to the outer wall of the sleeve positioned outside the valve cover, and lubricating liquid is injected into the liquid tank through the liquid injection channel so that the lubricating liquid is reserved between the elastic sealing ring and the sealing groove

As a further improvement of the utility model, the inner wall of the sealing groove comprises a cylindrical wall which is parallel to the axis of the sleeve and is connected with the bottom of the sealing groove and a circular truncated cone wall connected with the cylindrical wall, the diameter of an inner cavity defined by the circular truncated cone wall is gradually increased from one end close to the cylindrical wall to one end far away from the cylindrical wall, and the cylindrical wall is attached to the outer wall of the elastic sealing ring.

As a further improvement of the utility model, the gland comprises a ring body for pressing the sleeve downwards and a plurality of connecting bodies uniformly distributed on the outer wall of the ring body, the packing cover is provided with openings corresponding to the connecting bodies one by one, and bolts are sequentially passed through the connecting bodies and the openings and screwed into the valve cover so that the gland is fixed relative to the valve cover.

As a further development of the utility model, the distance between the gland and the valve cover is greater than the height of the packing cover.

The utility model has the beneficial effects that: according to the utility model, on the basis of the prior art, the sleeve is arranged between the packing and the valve rod, the gland and the ring for limiting the sleeve are arranged on the valve rod, the elastic sealing ring is arranged on the ring, the sealing groove for accommodating the elastic sealing ring is formed in the sleeve, and the packing is compacted by the packing cover, so that compared with the prior art, the design of the packing clamping sleeve can make up the defect that liquid can leak from the joint of the valve body and the valve cover and the gap between the valve rod and the valve body, and meanwhile, when liquid exists in the elastic sealing ring and the sealing groove, the self-sealing phenomenon can be further generated, so that the sealing property of the utility model is greatly improved, and the liquid leakage is prevented; according to the utility model, the rotation resistance between the valve rod and the filler in the prior art is converted into the rotation resistance between the elastic sealing ring and the sealing groove, so that the rotation efficiency of the valve rod relative to the valve body is improved, and the valve is more labor-saving.

Drawings

FIG. 1 is a front cross-sectional view of the present invention;

FIG. 2 is an enlarged view taken at A in FIG. 1;

FIG. 3 is a view showing the state in which FIG. 2 is pressed by the liquid;

FIG. 4 is a view of FIG. 1 under depression of lubricating fluid;

figure 5 is a perspective view of the sleeve, gland and packing cap assembled together.

Reference numerals: 1. a valve body; 2. a valve cover; 3. a valve stem; 4. a circular ring; 5. a sleeve; 6. an elastic sealing ring; 7. a gland; 8. a sealing groove; 9. a filler; 10. a filler cover; 11. a liquid injection channel; 12. a liquid bath; 13. A cylindrical wall; 14. a circular table wall; 15. a ring body; 16. a linker; 17. and (6) opening holes.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. In which like parts are designated by like reference numerals.

Referring to fig. 1 to 5, a ball valve of the present embodiment includes a valve body 1, a valve cover 2 covering the valve body 1, and a valve rod 3 penetrating the valve cover 2 and partially extending into the valve body 1;

based on the prior art, a ring 4 which is coaxial with the valve rod 3 is integrally formed on the valve rod 3, the ring 4 can penetrate through the valve body 1, the elastic sealing ring 6 is made of a material which has a larger elastic modulus and still has elastic deformation capacity, the elastic sealing ring 6 is sleeved on the valve rod 3 and is moved to the end face of the ring 4, the elastic sealing ring 6 can be inserted into the valve rod 1 by a gluing mode or by arranging a blind hole on the elastic sealing ring 6 and arranging an insert which can be inserted into the blind hole on the ring 4, so that the elastic sealing ring 6 can rotate along with the valve rod 3, the valve rod 3 extends into the valve body 1 and fixedly connects the end part of the valve rod with a valve core, the ring 4 and the elastic sealing ring 6 are both positioned in a cavity which is positioned above the valve core in the valve body 1, a sealing groove 8 is coaxially formed on the end part of a sleeve 5, the height of the sealing groove 8 is smaller than that of the elastic sealing ring 6, and the sealing groove 8 can be used for the elastic sealing ring 6 to extend into, the sleeve 5 is sleeved outside the valve rod 3 in a clearance fit mode, one end, provided with the sealing groove 8, of the sleeve 5 extends into the valve body 1, a gap is reserved between the sleeve 5 and the valve body 1 until the elastic sealing ring 6 partially enters the sealing groove 8 and is attached to the bottom of the sealing groove 8, the inner wall of the sealing groove 8 is in clearance fit with the outer wall of the elastic sealing ring 6, then the packing 9 is filled into the gap between the sleeve 5 and the valve body 1, the packing cover 10 is sleeved outside the valve rod 3, the packing cover 10 is arranged on the packing 9 and does not extrude the packing 9, then the gland 7 is sleeved outside the valve rod 3 and is abutted against the end, located outside the valve body 1, of the sleeve 5, the diameter of the gland 7 can be designed to be larger than that of the packing cover 10, a through hole is formed in a part, exceeding the packing cover 10, of the gland 7, a threaded hole corresponding to the through hole is formed in the valve cover 2, a bolt firstly penetrates through the through hole in the gland 7 and is screwed into the threaded hole in the valve cover 2, so that the sleeve 5 is positioned between the gland 7 and the ring 4 Meanwhile, the bottom of the sealing groove 8 is kept in a fit state with the elastic sealing ring 6, the end face of the sleeve 5 is not contacted with the circular ring 4, the gland 7 is higher than the valve cover 2 to meet the follow-up assembling operation of the packing cover 10, the hexagonal bolt is moved to the position below the gland 7 and penetrates through the through hole in the packing cover 10, the hexagonal bolt is screwed into the valve cover 2 from one side of the valve rod 3 by a wrench until the packing cover 10 compacts the loose packing 9, the installation of the packing cover 10 is completed, the compacted packing 9 is filled among the valve body 1, the sleeve 5 and the packing cover 10, the sleeve 5 is firmly grasped by the packing 9, if the depth of the packing cover 10 extending into the space between the valve body 1 and the sleeve 5 is smaller than the thickness of the valve cover 2, one end of the joint between the valve cover 2 and the valve body 1, close to the valve rod 3, is also sealed by the packing 9, and if the depth of the packing cover 10 extending into the space between the valve body 1 and the sleeve 5 is larger than the thickness of the valve cover 2, the liquid cannot reach the joint between the bonnet 2 and the valve body 1 through the packing 9;

when liquid in the pipeline is introduced into the valve body 1, the liquid flows into a cavity above the valve core, the liquid flows through a gap between the sleeve 5 and the circular ring 4 and enters the sealing groove 8, the liquid generates thrust towards the center of the valve rod 3 on the elastic sealing ring 6 to promote the elastic sealing ring 6 to generate elastic deformation, the bonding force generated by the elastic sealing ring 6 on the groove bottom of the sealing groove 8 is increased, the sealing property between the elastic sealing ring 6 and the sealing groove 8 is improved, the liquid cannot leak between the packing 9 and the sleeve 5 and between the elastic sealing ring 6 and the sealing groove 8 because the packing 9 is tightly bonded with the sleeve 5, and the deformation amount of the elastic sealing ring 6 is smaller because the elastic modulus of the elastic sealing ring 6 is larger, the increase of the adhesion force between the elastic sealing ring 6 and the sealing groove 8 is small, so that the subsequent valve rod 3 can rotate relative to the sleeve 5, when the valve is required to be opened and closed, the valve rod 3 rotates relative to the valve body 1, the sleeve 5 is tightly held by the filler 9, and the valve rod 3 is in clearance fit with the valve body 1, so that the valve rod 3 rotates relative to the sleeve 5, the elastic sealing element 6 is in an adhesion state with the groove bottom of the sealing groove 8, and the valve rod 3 can drive the elastic sealing element 6 to rotate relative to the sealing groove 8, further, the groove bottom of the sealing groove 8 is as smooth as possible, and lubricating oil can be smeared between the elastic sealing ring 6 and the sealing groove 8 in order to reduce the sliding friction between the sealing groove 8 and the elastic sealing ring 6;

compared with the prior art, the design can make up the defect that liquid can leak from the joint of the valve body and the valve cover and the gap between the valve rod and the valve body, and meanwhile, when liquid exists in the elastic sealing ring 6 and the sealing groove 8, the self-sealing phenomenon can be further generated, so that the sealing performance of the valve is greatly improved, and the liquid leakage is prevented; according to the utility model, the rotation resistance between the valve rod 3 and the packing 9 in the prior art is converted into the rotation resistance between the elastic sealing ring 6 and the sealing groove 8, so that the rotation efficiency of the valve rod 3 relative to the valve body 1 is improved, and the labor is saved.

As an improved specific embodiment, referring to fig. 1 to 5, a liquid injection channel 11 and a liquid tank 12 located on the bottom of the sealing groove 8 are provided on the sleeve 5, the liquid tank 12 is annular and located above the elastic sealing ring 6, the width of the liquid tank 12 is smaller than that of the elastic sealing ring 6, the elastic sealing ring 6 can cover the liquid tank 12, one end of the liquid injection channel 11 is communicated with the liquid tank 12, the other end of the liquid injection channel 11 extends to the outer wall of the sleeve 5 located outside the valve cover 2, lubricating liquid is injected into the liquid injection channel 11, the lubricating liquid flows to the upper side of the elastic sealing ring 6 along the liquid injection channel 11 and fills the liquid tank 12, because the requirement on the elastic modulus of the elastic sealing ring 6 in the foregoing embodiment is large, the deformation amount of the elastic sealing ring 6 is small, the elastic sealing ring 6 cannot completely adhere to the liquid tank 12 even when being deformed toward the liquid tank 12, and can be punched into the liquid injection channel 11, lubricating liquid is enabled to press the elastic sealing ring 6 downwards, the elastic sealing group 6 contracts downwards, two ends of the elastic sealing ring 6 extend, two ends of the elastic sealing ring 6 are fully attached to the groove wall of the sealing groove 8, the elastic sealing ring 6 is separated from the sealing groove 8 and can be used for lubricating liquid to flow in, so that the lubrication between the elastic sealing ring 6 and the sealing groove 8 can be kept, and the liquid injection channel 11 cannot be communicated with the interior of the valve body 1 all the time; the design of the liquid tank 12 can reduce the contact surface between the elastic sealing ring 6 and the bottom of the sealing groove 8, the inflow of the lubricating liquid can lubricate the elastic sealing ring 6 and the sealing groove 8, compared with the previous embodiment, the rotary resistance of the valve rod 3 relative to the sleeve 5 is greatly reduced, and the valve rod 3 is driven to rotate more laborsavingly;

further, the corners of the liquid tank 12 contacting the upper surface of the elastic sealing ring 6 are rounded to avoid the liquid tank 12 from wearing the elastic sealing ring 6, and the lubricating liquid can conveniently flow between the elastic sealing ring 6 and the sealing groove 8.

As an improved specific embodiment, referring to fig. 2 to 5, the inner wall of the sealing groove 8 includes a cylindrical wall 13 parallel to the axis of the sleeve 5 and connected to the bottom of the sealing groove 8, and a truncated cone wall 14 connected to the cylindrical wall 13, the diameter of an inner cavity enclosed by the truncated cone wall 14 gradually increases from one end close to the cylindrical wall 13 to one end away from the cylindrical wall 13, the cylindrical wall 13 is attached to the outer wall of the elastic sealing ring 6, and the design of the truncated cone wall 14 can guide the liquid to generate an extrusion force on the outer wall of the elastic sealing ring 6, which is beneficial to the overall deformation of the elastic sealing ring 6.

As a specific embodiment of the improvement, referring to fig. 1 and 5, the gland 7 includes a ring body 15 for pressing the sleeve 5 downward and a plurality of connecting bodies 16 uniformly distributed on the outer wall of the ring body 15, the packing cover 10 is provided with openings 17 corresponding to the plurality of connecting bodies 16 one by one, the openings 17 can extend along the radial direction of the packing cover 10, the structure of the packing cover 10 and the gland 7 can be similar to the fan blade structure of an electric fan, bolts are successively passed through the connecting bodies 16 and the openings 17 and screwed into the valve cover 2 to fix the gland 7 relative to the valve cover 2, compared with the design that the diameter of the gland 7 is larger than that of the packing cover 10 in the first embodiment, the design can avoid the situation that the position of the packing cover 10 needing the mounting bolt is blocked by the gland 7, an installer can screw the bolt into the valve cover 2 by using a screwdriver, so that the installation operation of the packing cover 10 is simplified, and the installation efficiency of the packing cover 10 is improved.

As a specific embodiment of the improvement, referring to fig. 1, there is a case that the packing 9 is added too little to cause the packing cover 10 to be unable to compact the packing 9, if the packing is added continuously, the gland 7 and the packing cover 10 are removed in sequence, which increases the time cost of installation, in order to solve the problem, the distance between the gland 7 and the valve cover 2 is greater than the height of the packing cover 10, so the packing cover 10 can be lifted away from the valve cover 2 and the packing 9 is supplemented to the gap between the sleeve 5 and the valve body 1 without removing the gland 7, which saves the assembly time and labor cost of the present invention.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the utility model may occur to those skilled in the art without departing from the principle of the utility model, and are considered to be within the scope of the utility model.

Claims

1. The utility model provides a ball valve, includes valve body (1), covers valve gap (2) on valve body (1) and runs through valve gap (2) and local valve rod (3) that stretch into in valve body (1), its characterized in that: the valve comprises a valve body (1), a rod body of the valve rod (3) extending into the valve body (1) is coaxially provided with a circular ring (4), the end face of the circular ring (4) facing the outside of the valve body (1) is provided with an elastic sealing ring (6), the valve rod (3) is sleeved with a sleeve (5) in clearance fit with the circular ring and a gland (7) which is used for pressing the sleeve (5) downwards and is fixedly connected with a valve cover (2), part of the sleeve (5) penetrates out of the valve cover (2) and extends into the end face of the valve body (1) to be provided with a sealing groove (8), the height of the sealing groove (8) is smaller than that of the elastic sealing ring (6), the groove bottom of the sealing groove (8) is abutted against the elastic sealing ring (6), a gap between the sleeve (5) and the valve body (1) is filled with a filler (9), the valve cover (2) is fixedly connected with a filler cover (10) which is used for compacting the filler (9) and is in clearance fit with the sleeve (5), when the valve rod (3) rotates relative to the valve body (1), the elastic sealing ring (6) rotates relative to the sealing groove (8).

2. The ball valve according to claim 1, wherein: be provided with injection channel (11) on sleeve (5) and cistern (12) that are located on seal groove (8) tank bottom, cistern (12) are cyclic annular and are located elastic sealing ring (6) top, cistern (12) width is less than the width of elastic sealing ring (6), the one end and cistern (12) intercommunication of injection channel (11), injection channel (11) other end extends to sleeve (5) and is located valve gap (2) outer wall, pours into lubricating liquid into cistern (12) through injection channel (11) and makes and leave lubricating liquid between elastic sealing ring (6) and seal groove (8).

3. The ball valve according to claim 1 or 2, wherein: the inner wall of seal groove (8) is including being on a parallel with sleeve (5) axis and cylinder wall (13) that links up with seal groove (8) tank bottom and round platform wall (14) that links up with cylinder wall (13), the inner chamber diameter that round platform wall (14) enclose is crescent to keeping away from cylinder wall (13) one end by being close to cylinder wall (13) one end, cylinder wall (13) laminate with the outer wall of elasticity sealing washer (6).

4. The ball valve according to claim 1 or 2, wherein: gland (7) including be used for pushing down ring body (15) of sleeve (5) and connector (16) of a plurality of equipartition on ring body (15) outer wall, offer trompil (17) with a plurality of connector (16) one-to-one on gland (10), pass connector (16) and trompil (17) with the bolt successively and screw in valve gap (2) and make gland (7) relative valve gap (2) fixed.

5. The ball valve according to claim 1 or 2, wherein: the distance between the gland (7) and the valve cover (2) is larger than the height of the packing cover (10).