Gate valve

Abstract

The utility model belongs to the technical field of valves, and particularly relates to a gate valve which comprises a valve body, a valve core and a valve core. The valve seat is arranged in the flow channel; the valve cover is arranged at the top of the valve body; the valve rod is arranged in the valve body, a gate plate is arranged at the bottom end of the valve rod, a hand wheel is arranged at the top end of the valve rod, and the valve rod is in threaded connection with the gate plate; the lifting block is arranged in the valve body and is in threaded connection with the valve rod, and an indicating block is arranged on the side edge of the lifting block; the transparent visual part is arranged on the valve body, and indicating scales are arranged on the outer surface of the transparent visual part; the buffer part is arranged at the inlet of the flow channel and is used for reducing the impact of the fluid on the flashboard; wherein the lifting block can ascend and descend in the axial direction of the valve rod, the indication block can be seen from the outer side of the valve body through the transparent visual part, and compared with the prior art, the flow adjusting effect of the gate valve is improved, and the service life of the gate valve is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of valves, and particularly relates to a gate valve. Background Art

[0002] A gate valve is a commonly used industrial valve for controlling the flow of media, especially suitable for occasions that require full opening or closing. It has the characteristics of simple structure, good sealing performance and wide application range. For example, a gate valve disclosed in the patent with the application number CN201721266934.5 includes a valve body, a valve seat, a valve stem, a valve cover, a gate plate and a valve cover nut. An annular groove is provided on the gate plate, a gasket is provided on the annular groove, the gasket abuts against the bottom of the valve stem, the valve cover is fixed on the valve body through the valve cover nut, and a lock piece is further provided between the valve cover nut and the valve cover;

[0003] During the use of this existing gate valve, it is difficult for workers to visually judge the opening and closing degree of the gate valve, which reduces the flow regulation effect of the gate valve. At the same time, the gate valve is easily affected by the water hammer effect during use, resulting in damage to the internal structure of the gate valve and reducing the service life of the gate valve. Therefore, it is necessary to make improvements. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a gate valve aiming at the above existing technical problems, so as to improve the flow regulation effect and the service life of the gate valve.

[0005] In view of this, the utility model provides a gate valve, including:

[0006] A valve body, in which a flow channel is provided;

[0007] A valve seat, which is arranged in the flow channel;

[0008] A valve cover, which is arranged on the top of the valve body;

[0009] A valve stem, which is arranged in the valve body. A gate plate is arranged at the bottom end of the valve stem, a hand wheel is arranged at the top end of the valve stem, and the valve stem is in threaded connection with the gate plate;

[0010] It further includes:

[0011] A lifting block, which is arranged in the valve body and is in threaded connection with the valve stem, and an indicating block is arranged on the side of the lifting block;

[0012] A transparent visual part, which is arranged on the valve body, and indicating scales are arranged on the outer surface of the transparent visual part;

[0013] A buffer part, which is arranged at the entrance of the flow channel to reduce the impact of the fluid on the gate plate;

[0014] Among them, the lifting block can move up and down along the axial direction of the valve stem, and the indicating block can be visually observed from the outside of the valve body through the transparent visual part.

[0015] In this technical solution, during the use of the gate valve, the gate plate moves up and down under the drive of the valve stem to open and close the flow channel. During the rotation of the valve stem, the lifting block moves up and down along the axial direction of the valve stem as the valve stem rotates, and the indicating block moves along with the movement of the lifting block. The staff can visually observe the moving position of the indicating block through the transparent visual part and correspond to the indicating scale, so as to complete the visual judgment of the opening and closing degree of the gate valve, effectively improving the flow regulation effect of the gate valve. At the same time, the impact generated by the fluid is buffered through the setting of the buffer part, preventing the water hammer effect from affecting the gate valve and damaging the internal structure of the gate valve, and improving the service life of the gate valve.

[0016] In the above technical solution, further, it further includes: a guide groove, which is arranged inside the valve body; a movable groove, which is arranged on the valve body and penetrates from the outer surface of the valve body to the guide groove;

[0017] Among them, the lifting block is movably matched with the guide groove, the indicating block is movably matched with the inner side of the movable groove, the transparent visual part is arranged in the movable groove, and the transparent visual part is hermetically matched with the movable groove.

[0018] In the above technical solution, further, the buffer part further includes:

[0019] A fixed frame, the fixed frame is annular, and a plurality of screw rod through holes are evenly spaced along the circumferential direction on the fixed frame;

[0020] A buffer plate, the buffer plate includes a plurality of transverse plates and a plurality of longitudinal plates, and the plurality of transverse rods and the plurality of longitudinal plates are evenly distributed inside the fixed frame, and the transverse plates and the longitudinal plates intersect with each other;

[0021] Among them, a plurality of screw holes are arranged at the entrance of the flow channel in the valve body, and the fixed frame is fixed at the entrance of the flow channel through the screw rods passing through the screw rod through holes and mating with the screw holes.

[0022] In the above technical solution, further, the cross section of the buffer plate is wavy.

[0023] In the above technical solution, further, the screw rod further includes:

[0024] A screw rod main body, an inner cavity is arranged in the screw rod main body, and internal threads are arranged on the inner wall of the inner cavity;

[0025] A secondary screw rod, the secondary screw rod is arranged in the inner cavity in a penetrating manner, and the upper part of the secondary screw rod is threadedly connected with the internal threads;

[0026] The extrusion block is arranged at the bottom end of the screw main body, and friction parts are arranged on both the inner and outer sides of the extrusion block;

[0027] Among them, the extrusion block can move along the radial direction of the screw main body, and the friction parts on both the inner and outer sides of the extrusion block can respectively abut against the auxiliary screw and the inner wall of the screw hole.

[0028] The beneficial effects of the present utility model are as follows:

[0029] 1. Through the setting of the indicating block, the staff can visually observe the moving position of the indicating block through the transparent visual part and correspond to the indicating scale, so as to complete the visual judgment of the opening and closing degree of the gate valve, effectively improving the flow regulation effect of the gate valve;

[0030] 2. Through the setting of the buffer part, the impact generated by the fluid is buffered, preventing the water hammer effect from affecting the gate valve and damaging the internal structure of the gate valve, and improving the service life of the gate valve;

[0031] 3. Through the setting of the extrusion block, the phenomenon of screw loosening can be effectively prevented, the installation stability of the buffer part is improved, and further the buffering effect on the fluid impact is ensured. Description of the Drawings

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0033] Figure 1 It is a schematic structural diagram of the specific implementation manner of the present utility model.

[0034] Figure 2 It is a schematic cross-sectional view structural diagram of the present utility model.

[0035] Figure 3 It is a schematic structural diagram of the buffer part of the present utility model.

[0036] Figure 4 It is a schematic front view structural diagram of the buffer part of the present utility model.

[0037] Figure 5 It is a schematic structural diagram of the screw of the present utility model.

[0038] The marks in the figure are shown as:

[0039] 1. Valve body; 2. Flow channel; 3. Valve seat; 4. Valve cover; 5. Valve stem; 6. Gate plate; 7. Handwheel; 8. Lifting block; 9. Indicator block; 10. Transparent visual part; 11. Buffer part; 12. Guide groove; 13. Movable groove; 14. Fixed frame; 15. Screw perforation; 16. Horizontal plate; 17. Vertical plate; 18. Screw body; 19. Inner cavity; 20. Auxiliary screw; 21. Extrusion block; 22. Friction part. Detailed implementation

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0041] In the description of this application, it should be noted that the terms used here are only for describing specific implementation manners and are not intended to limit the exemplary embodiments according to this application. For the convenience of description, the dimensions of each part shown in the drawings are not drawn according to the actual proportional relationship. Technologies, methods, and devices known to those of ordinary skill in the relevant fields may not be discussed in detail, but where appropriate, the technologies, methods, and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific value should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0042] Embodiment 1:

[0043] The embodiment of this application provides a gate valve, including: a valve body 1, a flow channel 2 is arranged in the valve body 1; a valve seat 3, the valve seat 3 is arranged in the flow channel 2; a valve cover 4, the valve cover 4 is arranged on the top of the valve body 1; a valve stem 5, the valve stem 5 is arranged in the valve body 1, a gate plate 6 is arranged at the bottom end of the valve stem 5, a handwheel 7 is arranged at the top end of the valve stem 5, and the valve stem 5 is threadedly connected with the gate plate 6;

[0044] It further includes: a lifting block 8, the lifting block 8 is arranged in the valve body 1 and is threadedly connected with the valve stem 5, and an indicator block 9 is arranged on the side of the lifting block 8; a transparent visual part 10, the transparent visual part 10 is arranged on the valve body 1, and an indicating scale is arranged on the outer surface of the transparent visual part 10; a buffer part 11, the buffer part 11 is arranged at the entrance of the flow channel 2 to reduce the impact of the fluid on the gate plate 6;

[0045] Among them, the lifting block 8 can move up and down along the axial direction of the valve stem 5, and the indicating block 9 can be visually observed from the outside of the valve body 1 through the transparent visual part 10.

[0046] It further includes: a guiding groove 12 provided inside the valve body 1; a movable groove 13 provided on the valve body 1 and penetrating from the outer surface of the valve body 1 to the guiding groove 12.

[0047] Among them, the lifting block 8 is movably matched with the guiding groove 12, the indicating block 9 is movably matched with the inner side of the movable groove 13, the transparent visual part 10 is arranged in the movable groove 13, and the transparent visual part 10 is hermetically matched with the movable groove 13.

[0048] Moreover, guiding blocks for cooperating with the guiding groove 12 are installed on both sides of the lifting block 8. The lifting block 8 is movably matched with the guiding groove 12 through the guiding blocks. The lifting block 8 can move up and down along the axial direction of the valve stem 5 and be fixed in the circumferential direction of the valve stem 5 through the cooperation of the guiding blocks and the guiding groove 12. The transparent visual part 10 is made of a conventional transparent material.

[0049] In this embodiment, during the use of the gate valve, the gate plate 6 moves up and down under the drive of the valve stem 5 to open and close the flow channel 2. During the rotation of the valve stem 5, the lifting block 8 moves up and down along the axial direction of the valve stem 5 as the valve stem 5 rotates, and the indicating block 9 moves along with the movement of the lifting block 8. The staff can visually observe the moving position of the indicating block 9 through the transparent visual part 10 and corresponding indicating scales, thereby completing the visual judgment of the opening and closing degree of the gate valve, effectively improving the flow regulation effect of the gate valve. At the same time, through the setting of the buffer part 11, the impact generated by the fluid is buffered, preventing the water hammer effect from affecting the gate valve and damaging the internal structure of the gate valve, and improving the service life of the gate valve.

[0050] Embodiment 2:

[0051] This embodiment provides a gate valve. In addition to including the technical solutions of the above embodiment, it further has the following technical features. The buffer part 11 further includes: a fixed frame 14 which is annular, and a plurality of screw holes 15 are evenly distributed along the circumferential direction on the fixed frame 14; a buffer plate which includes a plurality of transverse plates 16 and a plurality of longitudinal plates 17. The plurality of transverse rods and the plurality of longitudinal plates 17 are evenly distributed inside the fixed frame 14, and the transverse plates 16 and the longitudinal plates 17 intersect with each other.

[0052] Among them, a plurality of screw holes are provided at the entrance of the flow channel 2 inside the valve body 1, and the fixed frame 14 is fixed at the entrance of the flow channel 2 through the cooperation of the screws passing through the screw holes 15.

[0053] The cross-section of the buffer plate is wavy.

[0054] In this embodiment, when the fluid passes through the buffer portion 11, the fluid passes through the gap of the buffer plate and then moves to the gate plate 6. When a water hammer effect occurs in the flow channel 2, the buffer plate with a wavy cross-section can effectively absorb the impact of the fluid and reduce the flow velocity of the fluid, thereby reducing the impact on the gate plate 6, preventing the water hammer effect from affecting the gate valve and damaging the internal structure of the gate valve, and improving the service life of the gate valve.

[0055] Embodiment 3:

[0056] This embodiment provides a gate valve. In addition to including the technical solutions of the above embodiments, it also has the following technical features. The screw further includes: a screw main body 18, an inner cavity 19 is provided in the screw main body 18, and internal threads are provided on the inner wall of the inner cavity 19; a sub-screw 20, the sub-screw 20 passes through the inner cavity 19, and the upper part of the sub-screw 20 is threadedly connected with the internal threads; an extrusion block 21, the extrusion block 21 is arranged at the bottom end of the screw main body 18, and friction portions 22 are arranged on both the inner and outer sides of the extrusion block 21;

[0057] Wherein, the extrusion block 21 can move along the radial direction of the screw main body 18, and the friction portions 22 on both the inner and outer sides of the extrusion block 21 can respectively abut against the sub-screw 20 and the inner wall of the screw hole.

[0058] Moreover, the inner cavity 19 is a cylindrical cavity that cooperates with the sub-screw 20. The top end of the screw main body 18 has a groove that cooperates with the top end of the sub-screw 20. A groove for installing the extrusion block 21 is opened at the bottom of the screw main body 18. This groove penetrates from the surface of the screw main body 18 to the inner cavity 19. Moving grooves 13 are opened on both the upper and lower sides of this groove. Moving ears that cooperate with the above-mentioned moving grooves 13 are installed on both the upper and lower sides of the extrusion block 21. A conventional elastic member for resetting the extrusion block 21 can be installed in the moving groove 13. An inclined surface can be opened at the top end of the friction portion 22 on the inner side of the extrusion block 21 to facilitate the sub-screw 20 to push the extrusion block 21.

[0059] In this embodiment, when installing the buffer portion 11, the screw main body 18 is passed through the screw through-hole 15 and connected to the screw hole at the inlet of the flow channel 2. Then, the sub-screw 20 is screwed into the inner cavity 19 of the screw main body 18. As the sub-screw 20 is continuously screwed in, the bottom end of the sub-screw 20 squeezes the inner side of the extrusion block 21, thereby pushing the extrusion block 21 to move radially outward along the screw main body 18. After the sub-screw 20 is completely screwed in, the friction portion 22 on the outer side of the extrusion block 21 abuts against the inside of the screw hole, thereby increasing the friction force between the screw main body 18 and the screw hole and preventing the screw main body 18 from loosening. At the same time, the friction portion 22 inside the extrusion block 21 also abuts against the sub-screw 20, thereby increasing the friction force between the sub-screw 20 and the inner cavity 19 and preventing the sub-screw 20 from loosening. Compared with the prior art, the present utility model can effectively improve the installation stability of the buffer portion 11 and prevent the buffer portion 11 from falling off due to frequent impact by the fluid.

[0060] The embodiments of the present application have been described above in conjunction with the accompanying drawings. Without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above specific implementation manners. The above specific implementation manners are merely illustrative rather than restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all of them fall within the protection scope of the present application.

Claims

1. A gate valve, comprising: A valve body (1) with a flow channel (2) provided therein; A valve seat (3) disposed in the flow channel (2); A valve cover (4) arranged on the top of the valve body (1); A valve stem (5) disposed in the valve body (1), with a gate plate (6) provided at the bottom end of the valve stem (5), a handwheel (7) provided at the top end of the valve stem (5), and the valve stem (5) being threadedly connected to the gate plate (6); It is characterized in that it further comprises: A lifting block (8) arranged in the valve body (1) and threadedly connected to the valve stem (5), and an indicating block (9) provided on the side of the lifting block (8); A transparent visual part (10) arranged on the valve body (1), with indicating scales provided on the outer surface of the transparent visual part (10); A buffer part (11) arranged at the inlet of the flow channel (2) for reducing the impact of the fluid on the gate plate (6); Wherein, the lifting block (8) can move axially up and down along the valve stem (5), and the indicating block (9) can be visually observed from the outside of the valve body (1) through the transparent visual part (10).

2. The gate valve according to claim 1, characterized in that, It further comprises: A guiding groove (12) arranged inside the valve body (1); An activity groove (13) arranged on the valve body (1) and penetrating from the outer surface of the valve body (1) to the guiding groove (12); Wherein, the lifting block (8) is movably matched with the guiding groove (12), the indicating block (9) is movably matched with the inner side of the activity groove (13), the transparent visual part (10) is arranged in the activity groove (13), and the transparent visual part (10) is hermetically matched with the activity groove (13).

3. A gate valve according to claim 2, characterized in that, The buffer part (11) further comprises: A fixed frame (14) in a ring shape, with a plurality of screw rod perforations (15) evenly spaced along the circumferential direction on the fixed frame (14); A buffer plate including a plurality of transverse plates (16) and a plurality of longitudinal plates (17), with the plurality of transverse rods and the plurality of longitudinal plates (17) evenly distributed inside the fixed frame (14), and the transverse plates (16) and the longitudinal plates (17) intersecting each other; Wherein, a plurality of screw holes are provided at the inlet of the flow channel (2) in the valve body (1), and the fixed frame (14) is fixed at the inlet of the flow channel (2) by screws passing through the screw rod perforations (15) and mating with the screw holes.

4. A gate valve according to claim 3, characterized in that: The cross-section of the buffer plate is wavy.

5. A gate valve according to claim 4, characterized in that, The screw further comprises: A screw rod main body (18) with an inner cavity (19) provided therein, and internal threads provided on the inner wall of the inner cavity (19); A secondary screw rod (20) passing through the inner cavity (19), and the upper part of the secondary screw rod (20) being threadedly connected to the internal threads; An extrusion block (21) arranged at the bottom end of the screw rod main body (18), and friction parts (22) provided on both the inner and outer sides of the extrusion block (21); Wherein, the extrusion block (21) can move along the radial direction of the screw main body (18), and the friction parts (22) on the inner and outer sides of the extrusion block (21) can respectively abut against the auxiliary screw (20) and the inner wall of the screw hole.

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