Forged steel fully welded hard seal eccentric hemispherical valve for heating

By designing the bottom cover, threaded shaft, tooth block and other structures in the eccentric hemisphere valve, the close contact and self-locking function between the hemisphere and the valve seat is achieved, which solves the leakage problems caused by wear and the problem of seal adjustment, extends the service life and ensures normal use.

CN222702621UActive Publication Date: 2025-04-01BEIJING BEIGAO VALVE
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Patent Information

Application Number
CN202421372144.5
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-06-17
Publication Date
2025-04-01
Estimated Expiration
2034-06-17

AI Technical Summary

Technical Problem

During the long-term and frequent opening and closing of the eccentric hemisphere valve, wear is prone to occur between the hemisphere and the valve seat, resulting in leakage problems, and the integral fully welded structure is not convenient to adjust the sealing.

Method used

A fully welded hard sealed eccentric half-ball valve for heating is designed. By setting the bottom cover, threaded shaft, tooth block, rack, fixing rod, spring, push rod and half-ball, the close contact and self-locking function between the half-ball and the valve seat is achieved, which facilitates sealing adjustment.

Benefits of technology

It effectively avoids leakage problems caused by wear of the hemisphere and valve seat, and by adjusting the sealing properties, the service life of the valve is extended, ensuring the normal use of the eccentric hemisphere valve.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a forged steel fully welded hard-sealed eccentric semi-ball valve for heating, comprising a valve body, the right inner side end of the valve body is fixedly connected to a valve seat by screws, the left end of the valve seat is in contact with a semi-sphere, the inner side center of the valve body is rotatably connected to a valve stem, the inner top end of the valve stem at the bottom end is slidably connected to a fixing rod fixedly connected to the semi-sphere, through the provided bottom cover, threaded shaft, gear block, rack, fixing rod, spring, push rod and semi-sphere, when the eccentric semi-ball valve of the integral fully welded structure is frequently opened and closed for a long time, causing wear between the semi-sphere and the valve seat, and then causing the eccentric semi-ball valve to leak, by releasing the connection between the bottom valve stem and the fixing rod when the wear between the semi-sphere and the valve seat is serious, the push rod is further pushed by the elastic force of the spring to make the semi-sphere and the valve seat in close contact, which is convenient for adjusting the sealing of the eccentric semi-ball valve when it leaks, thereby ensuring the normal use of the eccentric semi-ball valve.
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Description

Technical Field

[0001] The utility model relates to the technical field of eccentric semi-ball valves, in particular to a forged steel fully welded hard-sealed eccentric semi-ball valve for heating. Background Art

[0002] The eccentric semi-ball valve is mainly composed of a valve body, a semi-sphere, a valve seat, a valve stem, etc. The cast eccentric semi-ball valve is generally a flange connection structure. If it is welded and used in heating projects, the eccentric semi-ball valve with an integral fully welded structure solves the problems of bolt and gasket connection of ordinary valves, loosening of bolts caused by thermal expansion and contraction, and external leakage caused by aging of gaskets. It can be directly welded on the pipeline without the need for matching flanges, bolts, and gaskets, saving installation labor costs and auxiliary material costs, and has a longer service life. However, the eccentric semi-ball valve is prone to wear after sliding between the semi-sphere and the valve seat when it is opened and closed frequently for a long time, which in turn causes the eccentric semi-ball valve to leak. Therefore, when the eccentric semi-ball valve is an integral fully welded structure, it is not convenient to adjust the sealing of the eccentric semi-ball valve. Therefore, in view of the above problems, a forged steel fully welded hard-sealed eccentric semi-ball valve for heating is proposed. Utility Model Content

[0003] The technical problem to be solved by the utility model overcomes the existing defects and can effectively solve the problems in the background technology.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A forged steel fully welded hard-sealed eccentric hemispherical valve for heating comprises a valve body, the inner right end of the valve body is fixedly connected to a valve seat by screws, the left end of the valve seat contacts a hemispherical body, a valve stem is rotatably connected to the inner center of the valve body, a fixing rod fixedly connected to the hemispherical body is slidably connected to the top inner side of the valve stem at the bottom, and the fixing rod passes through the valve stem at the bottom, a rack is fixedly connected to the bottom end of the fixing rod, a tooth block is meshingly connected to the outer side of the rack, and the tooth block is slidably connected to the valve stem at the bottom, a threaded shaft is spirally connected to the bottom inner side of the tooth block, and the threaded shaft passes through the valve stem at the bottom, and the threaded shaft is rotatably connected to the valve stem at the bottom.

[0006] As a further improvement of the utility model, the bottom end of the valve body contacts with a bottom cover, the outer bottom end of the bottom cover is spirally connected with a bolt that penetrates the bottom cover, and the bolt is spirally connected to the valve body.

[0007] As a further improvement of the utility model, a push rod is fixedly connected to the top left side of the hemisphere, and the push rod is slidably connected to the valve stem at the top, and a spring is fixedly connected to the inner left end of the push rod, and the other end of the spring is fixedly connected to the valve stem at the top.

[0008] As a further improvement of the utility model, the top end of the valve stem is fixedly connected to a driving shaft rotatably connected to the valve body, the outer side of the driving shaft is rotatably connected to a fixed cover fixedly connected to the valve body, the inner side of the fixed cover is provided with a worm gear fixedly connected to the driving shaft, the outer side of the worm gear is meshingly connected to a worm that penetrates the fixed cover, and the worm gear is rotatably connected to the fixed cover.

[0009] As a further improvement of the utility model, a limiting block is fixedly connected to the outer top end of the driving shaft, and the limiting block is slidably connected to the fixed cover, and the angular rotation range of the limiting block is 0° to 90°.

[0010] Compared with the prior art, the utility model has the following beneficial effects:

[0011] 1. The forged steel fully welded hard-sealed eccentric semi-ball valve for heating use has a bottom cover, a threaded shaft, a tooth block, a rack, a fixed rod, a spring, a push rod and a semi-sphere. When the eccentric semi-ball valve of the integral fully welded structure is frequently opened and closed for a long time, wear occurs between the semi-sphere and the valve seat, which in turn causes leakage of the eccentric semi-ball valve. After opening the bottom cover, the threaded shaft is rotated to spirally connect with the tooth block, so that the tooth block and the rack are further disengaged. Then, under the elastic force of the spring, the push rod pushes the semi-sphere to contact closely with the valve seat, and then reverses the threaded shaft to re-engage the tooth block and the rack. Finally, the bottom cover is reset. When the wear between the semi-sphere and the valve seat is serious, the connection between the bottom valve stem and the fixed rod is released, so that the push rod pushes the semi-sphere to contact closely with the valve seat under the elastic force of the spring, which facilitates the adjustment of the sealing of the eccentric semi-ball valve when leakage occurs, thereby ensuring the normal use of the eccentric semi-ball valve.

[0012] 2. The forged steel fully welded hard-sealed eccentric semi-ball valve for heating use has a worm, worm wheel, drive shaft and limit block. When the eccentric semi-ball valve is closed, the worm is rotated to engage the worm wheel, and the semi-sphere is further controlled to rotate ninety degrees through the drive shaft under the limit of the limit block, so as to control the eccentric semi-ball valve to be closed. The self-locking property of the worm and the worm wheel is used to ensure the stability of the eccentric semi-ball valve after closing, and avoid the phenomenon of accidental opening of the eccentric semi-ball valve after closing due to external vibration and other factors. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention.

[0014] Figure 1 The utility model is a schematic diagram of the overall structure of a forged steel fully welded hard-sealed eccentric hemispherical valve for heating.

[0015] Figure 2The utility model is a schematic diagram of the cross-sectional structure of a forged steel fully welded hard-sealed eccentric hemispherical valve for heating.

[0016] Figure 3 The utility model is a schematic diagram of the top view of the fixed cover of the forged steel fully welded hard-sealed eccentric semi-ball valve for heating.

[0017] In the figure: 1. valve body; 2. valve seat; 3. hemisphere; 4. valve stem; 5. fixing rod; 6. rack; 7. gear block; 8. threaded shaft; 9. bottom cover; 10. bolt; 11. push rod; 12. spring; 13. drive shaft; 14. fixing cover; 15. worm gear; 16. worm; 17. limit block. DETAILED DESCRIPTION

[0018] The utility model is further described below in conjunction with specific implementation methods, wherein the accompanying drawings are only used for exemplary descriptions and represent only schematic diagrams rather than actual drawings, and cannot be understood as limitations on this patent. In order to better illustrate the specific implementation methods of the utility model, some parts of the accompanying drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the accompanying drawings may be omitted. Based on the specific implementation methods in the utility model, all other specific implementation methods obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0019] Example 1

[0020] like Figure 1-3 As shown, a forged steel fully welded hard-sealed eccentric hemispherical valve for heating comprises a valve body 1, the inner right end of the valve body 1 is fixedly connected to a valve seat 2 by screws, the left end of the valve seat 2 contacts a hemispherical body 3, a valve stem 4 is rotatably connected to the inner center of the valve body 1, a fixing rod 5 fixedly connected to the hemispherical body 3 is slidably connected to the top inner side of the valve stem 4 at the bottom end, and the fixing rod 5 passes through the valve stem 4 at the bottom end, a rack 6 is fixedly connected to the bottom end of the fixing rod 5, a tooth block 7 is meshingly connected to the outer side of the rack 6, and the tooth block 7 is slidably connected to the valve stem 4 at the bottom end, a threaded shaft 8 is spirally connected to the bottom inner side of the tooth block 7, and the threaded shaft 8 passes through the valve stem 4 at the bottom end, and the threaded shaft 8 is rotatably connected to the valve stem 4 at the bottom end.

[0021] Example 2

[0022] like Figure 1-2As shown, in order to solve the problem that it is inconvenient to rotate the threaded shaft 8 and the tooth block 7 to spirally connect and release the connection between the bottom valve stem 4 and the fixed rod 5, the bottom end of the valve body 1 is in contact with a bottom cover 9, and the bottom end of the outer side of the bottom cover 9 is spirally connected with a bolt 10 that penetrates the bottom cover 9, and the bolt 10 is spirally connected to the valve body 1. By rotating the bolt 10 to disengage the spiral connection with the valve body 1, and then opening the bottom cover 9, it is convenient to rotate the threaded shaft 8 and the tooth block 7 to spirally connect and release the connection between the bottom valve stem 4 and the fixed rod 5.

[0023] Example 3

[0024] like Figure 2 As shown, in order to solve the problem that it is inconvenient to push the hemisphere 3 to make close contact with the valve seat 2 after the connection between the bottom valve stem 4 and the fixed rod 5 is released, a push rod 11 is fixedly connected to the top left side of the hemisphere 3, and the push rod 11 is slidably connected to the valve stem 4 at the top, and a spring 12 is fixedly connected to the left end of the inner side of the push rod 11, and the other end of the spring 12 is fixedly connected to the valve stem 4 at the top. After contacting the connection between the bottom valve stem 4 and the fixed rod 5, the elastic force of the spring 12 on the push rod 11 facilitates the hemisphere 3 to be pushed into close contact with the valve seat 2 through the push rod 11.

[0025] Example 4

[0026] like Figure 1-3 As shown, in order to solve the problem that it is inconvenient to ensure the stability of the hemispherical body 3 after rotation when the device is closed, the top of the valve stem 4 is fixedly connected to a driving shaft 13 rotatably connected to the valve body 1, and the outer side of the driving shaft 13 is rotatably connected to a fixed cover 14 fixedly connected to the valve body 1, and the inner side of the fixed cover 14 is provided with a worm gear 15 fixedly connected to the driving shaft 13, and the outer side of the worm gear 15 is meshed with a worm 16 that penetrates the fixed cover 14, and the worm 16 is rotatably connected to the fixed cover 14. When the device is closed, the worm 16 is rotated to mesh with the worm wheel 15, and the rotation of the hemispherical body 3 in the valve body 1 is further controlled by the driving shaft 13. The self-locking property of the worm 16 meshing with the worm wheel 15 is utilized to ensure the stability of the hemispherical body 3 after rotation.

[0027] Example 5

[0028] like Figure 1-3 As shown, in order to solve the problem of inconvenience in quickly and accurately controlling the rotation of the hemisphere 3 to close and open the device, the outer top end of the drive shaft 13 is fixedly connected to a limit block 17, and the limit block 17 is slidably connected to the fixed cover 14, and the angle rotation range of the limit block 17 is 0° to 90°. When the rotating worm 16 engages the worm wheel 15 and further controls the rotation of the hemisphere 3 in the valve body 1 through the drive shaft 13, the angle rotation range of the drive shaft 13 is controlled to be 0° to 90° under the limit of the limit block 17, which facilitates the quick and accurate control of the rotation of the hemisphere 3 to close and open the device.

[0029] In this embodiment, when the eccentric semi-ball valve is closed, the worm 16 is rotated to engage the worm wheel 15, and the semi-sphere 3 in the valve body 1 is further quickly and accurately controlled to rotate ninety degrees through the drive shaft 13 under the limit of the limit block 17, so as to control the eccentric semi-ball valve to be closed. The self-locking property of the worm 16 engaging the worm wheel 15 is utilized to ensure the stability of the eccentric semi-ball valve after closing. When the eccentric semi-ball valve with an integral fully welded structure is frequently opened and closed for a long time, resulting in wear between the semi-sphere 3 and the valve seat 2, thereby causing the eccentric semi-ball valve to leak, the bolt 10 is rotated to disengage the spiral connection with the valve body 1, and then the bottom cover 9 is opened and the threaded shaft 8 is spirally connected with the tooth block 7 to rotate. Then, the tooth block 7 is further disengaged from the rack 6, and then under the elastic force of the spring 12, the push rod 11 pushes the hemisphere 3 to make close contact with the valve seat 2, and finally the threaded shaft 8 is reversed to make the tooth block 7 and the rack 6 re-engage to position the fixed rod 5, and then the bottom cover 9 is reset to continue using the device. At this time, when the wear between the hemisphere 3 and the valve seat 2 is serious, the connection between the bottom valve stem 4 and the fixed rod 5 is released, and the push rod 11 is further pushed by the elastic force of the spring 12 to make close contact with the hemisphere 3 and the valve seat 2, which facilitates the adjustment of the sealing of the eccentric hemisphere valve when leakage occurs, thereby ensuring the normal use of the eccentric hemisphere valve.

[0030] The above is a preferred implementation mode of the utility model. The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. Technical personnel in this industry should understand that the utility model is not limited to the above embodiments. The above embodiments and descriptions are only for illustrating the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A forged steel fully welded hard-sealed eccentric hemispherical valve for heating, comprising a valve body (1), characterized in that: The right end of the inner side of the valve body (1) is fixedly connected to a valve seat (2) by means of screws, and the left end of the valve seat (2) contacts a hemisphere (3). The center of the inner side of the valve body (1) is rotatably connected to a valve stem (4). The top inner side of the valve stem (4) at the bottom end is slidably connected to a fixing rod (5) fixedly connected to the hemisphere (3), and the fixing rod (5) passes through the valve stem (4) at the bottom end. The bottom end of the fixing rod (5) is fixedly connected to a rack (6), and the outer side of the rack (6) is meshingly connected to a tooth block (7), and the tooth block (7) is slidably connected to the valve stem (4) at the bottom end. The bottom inner side of the tooth block (7) is spirally connected to a threaded shaft (8), and the threaded shaft (8) passes through the valve stem (4) at the bottom end, and the threaded shaft (8) is rotatably connected to the valve stem (4) at the bottom end.

2. The forged steel fully welded hard-sealed eccentric hemispherical valve for heating according to claim 1, characterized in that: The bottom end of the valve body (1) contacts a bottom cover (9), and a bolt (10) penetrating the bottom cover (9) is spirally connected to the outer bottom end of the bottom cover (9), and the bolt (10) is spirally connected to the valve body (1).

3. The forged steel fully welded hard-sealed eccentric hemispherical valve for heating according to claim 1, characterized in that: A push rod (11) is fixedly connected to the top left side of the hemispherical body (3), and the push rod (11) is slidably connected to the valve stem (4) at the top end; a spring (12) is fixedly connected to the left inner end of the push rod (11), and the other end of the spring (12) is fixedly connected to the valve stem (4) at the top end.

4. The forged steel fully welded hard-sealed eccentric hemispherical valve for heating according to claim 1, characterized in that: The top end of the valve stem (4) is fixedly connected to a driving shaft (13) rotatably connected to the valve body (1); the outer side of the driving shaft (13) is rotatably connected to a fixed cover (14) fixedly connected to the valve body (1); the inner side of the fixed cover (14) is provided with a worm gear (15) fixedly connected to the driving shaft (13); the outer side of the worm gear (15) is meshingly connected to a worm (16) penetrating the fixed cover (14), and the worm gear (16) is rotatably connected to the fixed cover (14).

5. The forged steel fully welded hard-sealed eccentric hemispherical valve for heating according to claim 4, characterized in that: The outer top end of the driving shaft (13) is fixedly connected to a limiting block (17), and the limiting block (17) is slidably connected to the fixed cover (14), and the angular rotation range of the limiting block (17) is 0° to 90°.