Structure of valve stem bidirectional limiting plane thrust bearing box

Abstract

The utility model discloses a structure of plane thrust bearing box of valve rod bidirectional limit, including valve body, be provided with valve stem on valve body and rotate, be provided with valve plate on valve stem, still include support, fixed screw rod, push -back, first plane thrust bearing, second plane thrust bearing, first bearing box board and second bearing box board, the support is fixed in one side of valve body, first bearing box board and second bearing box board fixed setting are in support, the push -back is set up in fixed screw rod, first plane thrust bearing and second plane thrust bearing set up respectively in two sides of push -back, first plane thrust bearing is used for with first bearing box board contact, second plane thrust bearing is used for with second bearing box board contact. This kind of structure has following beneficial effect: can make valve rod obtain more accurate limit, and the limit plane friction of valve rod also converts the ball friction of thrust bearing, thereby greatly reduces abrasion.

Description

Technical Field

[0001] This utility model relates to the field of valves, and in particular to the structure of a planar thrust bearing box with bidirectional valve stem limiting. Background Technology

[0002] In butterfly valves, the valve stem may move back and forth during operation. To prevent this, valves typically use a snap ring or semi-ring structure to limit the valve stem movement. However, to accommodate the fit of various components, this structure usually requires a relatively large limiting dimension, resulting in a significant amount of stem movement. Furthermore, once the valve stem reaches the limiting position, the limiting groove on the valve stem will directly rub against the snap ring or semi-ring, quickly wearing them down to the point of unusability. Utility Model Content

[0003] To address the aforementioned problems, this invention proposes a planar thrust bearing housing structure for bidirectional valve stem limiting. The first and second planar thrust bearings can respectively buffer and limit the movement in two directions on both sides of the push plate, thereby enabling the valve stem to achieve more precise limiting. Furthermore, the limiting plane friction of the valve stem is converted into ball friction of the thrust bearing, thus greatly reducing wear.

[0004] The technical solution adopted by this utility model is as follows:

[0005] A structure for a bidirectional limiting planar thrust bearing housing for a valve stem includes a valve body, a valve stem rotatably mounted on the valve body, a valve plate mounted on the valve stem, a bracket, a fixing screw, a push plate, a first planar thrust bearing, a second planar thrust bearing, a first bearing housing plate, and a second bearing housing plate. The bracket is fixed to one side of the valve body, the first and second bearing housing plates are fixedly mounted on the bracket, the push plate is mounted on the fixing screw, and the first and second planar thrust bearings are respectively mounted on both sides of the push plate. The first planar thrust bearing is used to contact the first bearing housing plate, and the second planar thrust bearing is used to contact the second bearing housing plate.

[0006] In this structure, a fixing screw is installed on the valve stem, and a push plate is installed on the fixing screw. A first planar thrust bearing and a second planar thrust bearing are installed on the fixing screw, and the first and second planar thrust bearings are located on opposite sides of the push plate. The first planar thrust bearing is used to contact the first bearing housing plate, and the second planar thrust bearing is used to contact the second bearing housing plate. Therefore, the first and second planar thrust bearings can buffer and limit the movement in two directions on opposite sides of the push plate, thereby enabling the valve stem to achieve more precise limiting. Furthermore, the limiting plane friction of the valve stem is converted into ball friction of the thrust bearing, thus greatly reducing wear.

[0007] In summary, the first and second planar thrust bearings in this structure can buffer and limit the movement in two directions on both sides of the push plate, thereby enabling the valve stem to achieve more precise positioning. Furthermore, the limiting plane friction of the valve stem is converted into ball friction of the thrust bearing, which greatly reduces wear.

[0008] Optionally, a flat key is also included, wherein the push plate and the fixing screw are fitted together by the flat key, and the flat key is located between the push plate and the fixing screw.

[0009] The function of the key is to link and fix the screw and the push plate, so that the push plate can rotate together when the valve stem rotates.

[0010] Optionally, a partition plate is also included, which is disposed between the first bearing housing plate and the second bearing housing plate.

[0011] Optionally, it also includes mounting bolts and mounting nuts, wherein the first bearing housing plate and the second bearing housing plate are mounted to the bracket by the mounting bolts and mounting nuts.

[0012] Optionally, it also includes a mounting screw and a base plate, the base plate being mounted on one side of the second bearing housing plate via the mounting screw.

[0013] Optionally, a deep groove ball bearing is also included, which is disposed on the base plate, and one end of the fixing screw is engaged with the deep groove ball bearing.

[0014] The function of a deep groove ball bearing is to limit the up and down movement of the fixed screw.

[0015] Optionally, it also includes a limiting block, a first fixing nut, and a second fixing nut. The limiting block is disposed on the valve stem and is slidably engaged with the fixing screw. The first fixing nut and the second fixing nut are fixed on the fixing screw. The first fixing nut and the second fixing nut are located on the same side of the push plate, and the first fixing nut and the limiting block are located on opposite sides of the push plate.

[0016] Optionally, a mounting bearing is provided between the bracket and the valve stem.

[0017] The beneficial effects of this utility model are: the first planar thrust bearing and the second planar thrust bearing can respectively buffer and limit the movement in two directions on both sides of the push plate, thereby enabling the valve stem to obtain more precise limiting, and the limiting plane friction of the valve stem is also converted into the ball friction of the thrust bearing, thereby greatly reducing wear. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0019] Figure 1 This is a simplified structural diagram of a planar thrust bearing housing with bidirectional valve stem limiting.

[0020] Figure 2 yes Figure 1 A simplified enlarged diagram of point B in the middle.

[0021] The figures are labeled as follows: 1. Valve body; 2. Valve plate; 3. Valve stem; 4. Bracket; 5. Fixing screw; 6. Gasket; 7. Limiting block; 8. Flat key; 9. First fixing nut; 10. Second fixing nut; 11. Deep groove ball bearing; 12. Base plate; 13. First bearing housing plate; 14. Partition plate; 15. Second bearing housing plate; 16. First thrust bearing; 17. Push plate; 18. Thrust bearing; 19. Mounting bolt; 20. Mounting nut; 21. Mounting screw; 22. Mounting bushing. Detailed Implementation

[0022] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0023] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0024] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0025] As attached Figure 1 and appendix Figure 2 As shown, a structure of a planar thrust bearing 18 housing for bidirectional limiting of valve stem 3 includes a valve body 1, a valve stem 3 rotatably mounted on the valve body 1, a valve plate 2 mounted on the valve stem 3, a bracket 4, a fixing screw 5, a push plate 17, a first planar thrust bearing 1816, a second planar thrust bearing 18, a first bearing housing plate 13, and a second bearing housing plate 15. The bracket 4 is fixed to one side of the valve body 1, the first bearing housing plate 13 and the second bearing housing plate 15 are fixedly mounted on the bracket 4, the push plate 17 is mounted on the fixing screw 5, and the first planar thrust bearing 1816 and the second planar thrust bearing 18 are respectively mounted on both sides of the push plate 17. The first planar thrust bearing 1816 is used to contact the first bearing housing plate 13, and the second planar thrust bearing 18 is used to contact the second bearing housing plate 15.

[0026] In this structure, a fixing screw 5 is provided on the valve stem 3, and a push plate 17 is provided on the fixing screw 5. A first planar thrust bearing 1816 and a second planar thrust bearing 18 are provided on the fixing screw 5. The first planar thrust bearing 1816 and the second planar thrust bearing 18 are located on both sides of the push plate 17. The first planar thrust bearing 1816 is used to contact the first bearing housing plate 13, and the second planar thrust bearing 18 is used to contact the second bearing housing plate 15. Therefore, the first planar thrust bearing 1816 and the second planar thrust bearing 18 can buffer and limit the movement in two directions on both sides of the push plate 17, thereby enabling the valve stem 3 to obtain more precise limiting. Furthermore, the limiting plane friction of the valve stem 3 is converted into the ball friction of the thrust bearing, thereby greatly reducing wear.

[0027] In summary, in this structure, the first planar thrust bearing 1816 and the second planar thrust bearing 18 can respectively buffer and limit the movement in two directions on both sides of the push plate 17, thereby enabling the valve stem 3 to obtain more precise limiting. Furthermore, the limiting plane friction of the valve stem 3 is also converted into the ball friction of the thrust bearing, thereby greatly reducing wear.

[0028] As attached Figure 1 and appendix Figure 2 As shown, it also includes a flat key 8, which is used to connect the push plate and the fixing screw 5. The flat key 8 is located between the push plate and the fixing screw 5.

[0029] The function of the key 8 is to link and fix the screw 5 and the push plate 17, so that the push plate 17 can rotate together when the valve stem 3 rotates.

[0030] As attached Figure 1 and appendix Figure 2 As shown, it also includes a partition 14, which is disposed between the first bearing housing plate 13 and the second bearing housing plate 15.

[0031] As attached Figure 1 and appendix Figure 2 As shown, it also includes mounting bolts 19 and mounting nuts 20. The first bearing housing plate 13 and the second bearing housing plate 15) are mounted to the bracket 4 by mounting bolts 19 and mounting nuts 20.

[0032] As attached Figure 1 and appendix Figure 2 As shown, it also includes a mounting screw 21 and a base plate 12, which is mounted on one side of the second bearing housing plate 15 via the mounting screw 21.

[0033] As attached Figure 1 and appendix Figure 2 As shown, it also includes a deep groove ball bearing 11, which is mounted on the base plate 12, and one end of the fixing screw 5 is engaged with the deep groove ball bearing 11.

[0034] The function of the deep groove ball bearing 11 is to limit the up and down movement of the fixed screw 5.

[0035] As attached Figure 1 and appendix Figure 2 As shown, it also includes a limiting block 7, a first fixing nut 9 and a second fixing nut 10. The limiting block 7 is disposed on the valve stem 3 and is slidably engaged with the fixing screw 5. The first fixing nut 9 and the second fixing nut 10 are fixed on the fixing screw 5. The first fixing nut 9 and the second fixing nut 10 are located on the same side of the push plate. The first fixing nut 9 and the limiting block 7 are located on both sides of the push plate 17.

[0036] As attached Figure 1and appendix Figure 2 As shown, a mounting bearing is provided between the bracket 4 and the valve stem 3.

[0037] Combined with appendix Figure 2 The working process of this structure is described in detail as shown in the figure.

[0038] When the valve stem 3 moves to the left during rotation, the first fixing nut 9 on the fixing screw 5 will press the push plate 17 against the first planar thrust bearing 1816, which will then act as a limit. Furthermore, the flat key 8 on the fixing screw 5 will rotate along with the valve stem 3, causing the push plate 17 to rotate as well, thus rotating the first planar thrust bearing 1816. This converts planar hard friction into rolling friction of the planar thrust bearing 18, significantly reducing wear.

[0039] When the valve stem 3 moves to the right during rotation, the limiting block 7 presses the push plate 17 against the second planar thrust bearing 18, with the first planar thrust bearing 1816 acting as the limiting element. Furthermore, the flat key 8 on the fixing screw 5 causes the push plate 17 to rotate along with the valve stem 3, thereby rotating the second planar thrust bearing 18. This converts planar hard friction into rolling friction of the planar thrust bearing 18, significantly reducing wear.

[0040] The above-described embodiments only illustrate some aspects of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A structure of a planar thrust bearing housing with bidirectional valve stem limiting, comprising a valve body, a valve stem rotatably mounted on the valve body, and a valve plate mounted on the valve stem, characterized in that, It also includes a bracket, a fixing screw, a push plate, a first planar thrust bearing, a second planar thrust bearing, a first bearing housing plate, and a second bearing housing plate. The bracket is fixed to one side of the valve body. The first bearing housing plate and the second bearing housing plate are fixedly mounted on the bracket. The push plate is mounted on the fixing screw. The first planar thrust bearing and the second planar thrust bearing are respectively mounted on both sides of the push plate. The first planar thrust bearing is used to contact the first bearing housing plate, and the second planar thrust bearing is used to contact the second bearing housing plate.

2. The structure of the planar thrust bearing housing with bidirectional valve stem limiting according to claim 1, characterized in that, It also includes a flat key, which is used to connect the push plate and the fixing screw. The flat key is located between the push plate and the fixing screw.

3. The structure of a planar thrust bearing housing with bidirectional valve stem limiting according to claim 1, characterized in that, It also includes a partition plate, which is disposed between the first bearing housing plate and the second bearing housing plate.

4. The structure of a planar thrust bearing housing with bidirectional valve stem limiting according to claim 1, characterized in that, It also includes mounting bolts and mounting nuts, and the first bearing housing plate and the second bearing housing plate are mounted to the bracket by the mounting bolts and mounting nuts.

5. The structure of a planar thrust bearing housing with bidirectional valve stem limiting according to claim 4, characterized in that, It also includes a mounting screw and a base plate, the base plate being mounted on one side of the second bearing housing plate via the mounting screw.

6. The structure of a planar thrust bearing housing with bidirectional valve stem limiting according to claim 5, characterized in that, It also includes a deep groove ball bearing, which is disposed on the base plate, and one end of the fixing screw is engaged with the deep groove ball bearing.

7. The structure of a planar thrust bearing housing with bidirectional valve stem limiting according to claim 1, characterized in that, It also includes a limiting block, a first fixing nut, and a second fixing nut. The limiting block is disposed on the valve stem and is slidably engaged with the fixing screw. The first fixing nut and the second fixing nut are fixed on the fixing screw. The first fixing nut and the second fixing nut are located on the same side of the push plate, and the first fixing nut and the limiting block are located on opposite sides of the push plate.

8. The structure of a planar thrust bearing housing with bidirectional valve stem limiting according to claim 1, characterized in that, A mounting bearing is provided between the bracket and the valve stem.

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