Gate valve convenient to open and close

Abstract

The gate valve convenient to open and close comprises a valve body, a valve cover is arranged at the top of the valve body, a handle is arranged at the top end of the valve cover, a valve rod is arranged in the middle of the handle in a penetrating mode, the valve rod is in threaded connection with the handle, and a gate plate is arranged at the end, located in the valve body and the valve cover, of the valve rod. A lubricating mechanism for assisting the valve rod to move is arranged in the middle of the valve cover; the lubricating mechanism comprises a lubricating box and an adding opening, the lubricating box is arranged on the side face of the valve body and fixedly connected with the handle, the adding opening is formed in the top of the lubricating box, a sealing cover is arranged on the top of the adding opening, a lubricating cavity is formed in the lubricating box, and a lubricating assembly is arranged in the lubricating cavity. Through the lubricating mechanism arranged in the middle of the valve cover, the lubricating mechanism can coat lubricating oil on the outer side of the valve rod when the valve rod moves up and down, it is guaranteed that the valve rod can still move smoothly after being used for a long time, frictional resistance during operation is reduced, and opening and closing are easier.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a gate valve which is convenient to open and close. Background Art

[0002] Gate valve is a commonly used valve type, usually used to control the flow of fluid (liquid or gas) in pipelines. The main function of gate valve is to open, close or adjust the flow of fluid. Gate valve is widely used in many industrial fields, especially in occasions that require better sealing performance and smaller fluid resistance.

[0003] The prior art with patent number CN 218063463 U discloses: including a valve body, a valve disc, a valve stem, a valve cover, an indicating mechanism and a driving device, wherein a temporary storage chamber is provided in the valve body; the valve disc is provided in the valve body; the valve stem is threadedly connected to the valve disc, and one end of the valve stem passes through the temporary storage chamber; the valve cover is provided on the valve body, one end of the valve stem passes through the valve cover, and the valve stem and the valve cover are rotatably connected; the indicating mechanism includes a visual component and a moving component, wherein the visual component is provided on the valve body; the moving component is sleeved on the outside of the valve stem, the lower surface of the moving component is fixed on the top of the valve disc, and the moving component abuts against the visual component; the driving device is provided at one end of the valve stem. The gate valve of the embodiment of the utility model is convenient for workers to judge the opening and closing degree of the gate valve, so that the gate valve is suitable for flow regulation, thereby expanding the scope of application;

[0004] The above patent document discloses a gate valve to solve the problem that it is inconvenient for workers to judge the opening and closing degree of the gate valve; although the gate valve of the above patent can assist workers in judging the opening and closing degree of the gate valve, it still has the following defects in the actual use of the gate valve:

[0005] 1. After long-term use of the gate valve, the friction between the valve stem and the packing will gradually increase, which may easily lead to difficulty in opening and closing the gate valve or even failure;

[0006] 2. During the use of the gate valve, the gate plate will constantly contact and rub against the valve seat. Over time, wear will occur between the gate plate and the valve seat, resulting in a decrease in the sealing performance of the gate plate and the valve seat.

[0007] In summary, there is a need for a gate valve that is easy to open and close for a long time. Utility Model Content

[0008] In view of the deficiencies in the prior art, the utility model provides a gate valve that is easy to open and close, thereby solving the problems mentioned in the background technology.

[0009] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0010] A gate valve that is easy to open and close, comprising a valve body, a valve cover is provided on the top of the valve body, a handle is provided on the top of the valve cover, a valve stem is passed through the middle of the handle, the valve stem is threadedly connected to the handle, a gate is provided at one end of the valve stem located inside the valve body and inside the valve cover, a valve seat is provided inside the valve body, and a lubrication mechanism for assisting the movement of the valve stem is provided in the middle of the valve cover;

[0011] The lubrication mechanism comprises a lubrication box and a filling port, the lubrication box is arranged on the side of the valve body, the lubrication box is fixedly connected to the handle, the top of the lubrication box is provided with a filling port, the top of the filling port is provided with a sealing cover, a lubrication cavity is formed inside the lubrication box, a lubrication assembly is arranged inside the lubrication cavity, the lubrication assembly extends to the inside of the valve cover, and the lubrication box is mirror-distributed outside the valve body;

[0012] A packing is arranged on the top of the inner side of the handle, and the packing is slidably connected with the outer side of the valve stem.

[0013] Furthermore, the lubrication assembly includes a lubrication tube and a lubrication strip. The lubrication tube is arranged inside the handle. A lubrication strip is arranged inside the lubrication tube. One end of the lubrication strip is located inside the valve cover, and the other end of the lubrication strip is located inside the lubrication cavity. A lubrication ring is provided at one end of the lubrication strip located inside the valve cover, and the lubrication ring is slidably connected to the valve stem.

[0014] Furthermore, the gate plate includes a mounting plate, a top plate, a combination disk and a reinforcement block. A top plate is provided on the top of the mounting plate, a combination disk is provided on the top surface of the top plate, and a reinforcement block is provided on the outer side of the top of the mounting plate. The reinforcement block and the top plate are both engaged and slid with the inside of the valve cover and the inside of the valve body.

[0015] Furthermore, a connecting plate is provided at the bottom end of the valve stem, and the connecting plate is fixedly welded to the combined plate.

[0016] Furthermore, a mounting ring is provided on the outer side of the bottom of the mounting plate, a valve cover disc is provided on the outer side of the mounting ring, a support disc is provided inside the mounting ring, the support disc is an elastic structure, and the mounting ring is threadedly connected to the valve cover disc.

[0017] Furthermore, the mounting ring, valve cover plate and support plate are arranged correspondingly, and the mounting ring, valve cover plate and support plate are distributed in a mirror image on the outer side of the mounting plate.

[0018] Furthermore, a sealing slope is provided on the side of the valve cover disc, and the sealing slope is slidably fitted with the valve seat.

[0019] The utility model provides a gate valve that is easy to open and close. Compared with the prior art, it has the following beneficial effects:

[0020] Through the lubrication mechanism set in the middle of the valve cover, the lubrication mechanism can apply lubricating oil to the outside of the valve stem when the valve stem moves up and down, ensuring that the valve stem can still move smoothly after long-term use, reducing friction resistance during operation, and making opening and closing easier. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 A schematic structural diagram of a gate valve that is easy to open and close is shown in the utility model;

[0023] Figure 2 The utility model is shown in a cross-sectional view of the overall structure;

[0024] Figure 3 The schematic diagram of opening and closing of the gate of the utility model is shown;

[0025] Figure 4 The schematic diagram of the structure of the lubrication mechanism of the utility model is shown;

[0026] Figure 5 The schematic diagram of the structure of the gate plate of the utility model is shown;

[0027] As shown in the figure: 1. Valve body; 11. Valve seat; 2. Valve cover; 21. Handle; 22. Packing; 3. Valve stem; 31. Connecting plate; 4. Gate; 41. Mounting plate; 42. Top plate; 43. Combination plate; 44. Reinforcement block; 45. Mounting ring; 46. Valve cover plate; 47. Support plate; 5. Lubrication mechanism; 51. Lubrication box; 52. Adding port; 53. Lubrication pipe; 54. Lubrication strip; 55. Lubrication ring. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model is described clearly and completely. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] Embodiment 1

[0030] In order to solve the technical problems in the background technology, a gate valve that is easy to open and close is provided as follows:

[0031] Combination Figure 1-Figure 4As shown, the utility model provides a gate valve that is easy to open and close, including a valve body 1, a valve cover 2 is provided on the top of the valve body 1, the valve cover 2 is bolted and fixed to the valve body 1, a handle 21 is provided on the top of the valve cover 2 to engage and rotate with the valve cover 2, a valve stem 3 is penetrated in the middle of the handle 21, the valve stem 3 is threadedly connected to the handle 21, a gate plate 4 is provided at one end of the valve stem 3 located inside the valve body 1 and inside the valve cover 2, a valve seat 11 is provided inside the valve body 1, and a lubrication mechanism 5 for assisting the movement of the valve stem 3 is provided in the middle of the valve cover 2; through the lubrication mechanism 5 provided in the middle of the valve cover 2, the lubrication mechanism 5 can apply lubricating oil to the outside of the valve stem 3 when the valve stem 3 moves up and down, so as to ensure that the valve stem 3 can still move smoothly after long-term use, reduce the friction resistance during operation, and make opening and closing easier;

[0032] The lubrication mechanism 5 includes a lubrication box 51 and a filling port 52. The lubrication box 51 is arranged on the side of the valve body 1. The lubrication box 51 is fixedly connected to the handle 21. The top of the lubrication box 51 is provided with a filling port 52. The top of the filling port 52 is provided with a sealing cover. A lubrication cavity is formed inside the lubrication box 51. The lubrication cavity can store lubricating oil. A lubrication component is arranged inside the lubrication cavity. The lubrication component extends to the inside of the valve cover 2. The lubrication box 51 is mirror-distributed on the outside of the valve body 1. The mirror-distributed lubrication box 51 facilitates the lubrication oil to be applied to the outside of the valve stem 3 through the lubrication component arranged inside. A packing 22 is provided on the top of the inner side of the handle 21. The packing 22 is slidably connected to the outside of the valve stem 3.

[0033] In this embodiment, the lubrication assembly includes a lubrication tube 53 and a lubrication strip 54. The lubrication tube 53 is arranged inside the handle 21. The lubrication strip 54 is arranged inside the lubrication tube 53. One end of the lubrication strip 54 is located inside the valve cover 2, and the other end of the lubrication strip 54 is located inside the lubrication cavity. A lubrication ring 55 is arranged at one end of the lubrication strip 54 located inside the valve cover 2. The lubrication ring 55 is slidably connected to the valve stem 3. The arrangement of the lubrication strip 54 can guide the lubrication oil inside the lubrication cavity to the inside of the lubrication ring 55, so that when the valve stem 3 slides inside the lubrication ring 55, the lubrication ring 55 applies the lubrication oil to the outside of the valve stem 3.

[0034] The implementation principle of the first embodiment is: when the handle 21 rotates to drive the threaded valve stem 3 to lift and lower the gate plate 4 to open and close, the valve stem 3 will slide against the lubrication ring 55 in the lubrication mechanism 5. The lubrication ring 55 will, with the assistance of the lubrication strip 54, apply the lubricating oil inside the lubrication box 51 to the outside of the valve stem 3. After the gate valve has been used for a long time, the valve stem 3 can move smoothly, thereby making the opening and closing of the gate valve more convenient.

[0035] Embodiment 2

[0036] like Figure 1-Figure 5 As shown, based on the above embodiment, this embodiment further provides the following contents:

[0037] In order to make the gate plate 4 inside the gate valve more convenient for long-term use, this embodiment provides the following design:

[0038] The gate plate 4 includes a mounting plate 41, a top plate 42, a combination plate 43 and a reinforcement block 44. The top plate 42 is provided on the top of the mounting plate 41, and the combination plate 43 is provided on the top surface of the top plate 42. A reinforcement block 44 is provided on the outer side of the top of the mounting plate 41. The reinforcement block 44 and the top plate 42 are both engaged and slid with the inside of the valve cover 2 and the inside of the valve body 1. The setting of the reinforcement block 44 can support the mounting plate 41 inside the valve cover 2 and the inside of the valve body 1, so as to improve the stability of the gate plate 4.

[0039] In this embodiment, a connecting plate 31 is provided at the bottom end of the valve stem 3, and the connecting plate 31 is fixedly welded to the combined plate 43. Under the fixed welding effect of the connecting plate 31 and the combined plate 43, the valve stem 3 is convenient for driving the gate plate 4 to move up and down;

[0040] In this embodiment, a mounting ring 45 is provided on the outer side of the bottom of the mounting plate 41, a valve cover plate 46 is provided on the outer side of the mounting ring 45, a support plate 47 is provided inside the mounting ring 45, and the support plate 47 is of an elastic structure. The mounting ring 45 is threadedly connected with the valve cover plate 46. Under the threaded connection between the mounting ring 45 and the valve cover plate 46, the worn valve cover plate 46 can be replaced after the gate valve is used for a long time. The support plate 47 with an elastic structure can support the valve cover plate 46 from the inside of the mounting ring 45, so as to improve the connection firmness between the valve cover plate 46 and the mounting ring 45.

[0041] In this embodiment, the mounting ring 45, the valve cover plate 46 and the support plate 47 are arranged correspondingly, and the mounting ring 45, the valve cover plate 46 and the support plate 47 are distributed in a mirror image on the outside of the mounting plate 41. The mirror image-distributed mounting ring 45, the valve cover plate 46 and the support plate 47 facilitate the engagement and connection with the valve seat 11 inside the valve body 1;

[0042] As an improvement of the above solution, a sealing slope is provided on the side of the valve cover disc 46, and the sealing slope slides in contact with the valve seat 11. The sealing slope provided on the side of the valve cover disc 46 can assist the gate plate 4 to slide and engage with the valve seat 11.

[0043] The implementation principle of the second embodiment is as follows: after the gate valve has been used for a long time, the gate plate 4 is in continuous sliding contact with the valve seat 11, and the valve cover plate 46 in the gate plate 4 will produce certain wear. At this time, the staff opens the valve cover 2, lifts the gate plate 4 out of the valve body 1, and then rotates the valve cover plate 46. The valve cover plate 46 can be separated from the outside of the threaded mounting ring 45. After the valve cover plate 46 is removed from the outside of the mounting plate 41, a new valve cover plate 46 matching the valve seat 11 can be installed on the outside of the mounting plate 41, thereby facilitating the long-term use of the gate valve.

[0044] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0045] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A gate valve that is easy to open and close, characterized by: The invention comprises a valve body (1), a valve cover (2) is provided on the top of the valve body (1), a handle (21) is provided on the top of the valve cover (2), a valve stem (3) is provided through the middle of the handle (21), the valve stem (3) is threadedly connected to the handle (21), a gate plate (4) is provided at one end of the valve stem (3) located inside the valve body (1) and inside the valve cover (2), a valve seat (11) is provided inside the valve body (1), and a lubrication mechanism (5) for assisting the movement of the valve stem (3) is provided in the middle of the valve cover (2); The lubrication mechanism (5) comprises a lubrication box (51) and a filling port (52), the lubrication box (51) being arranged on the side of the valve body (1), the lubrication box (51) being fixedly connected to the handle (21), the top of the lubrication box (51) being provided with a filling port (52), the top of the filling port (52) being provided with a sealing cover, a lubrication cavity being formed inside the lubrication box (51), a lubrication assembly being arranged inside the lubrication cavity, the lubrication assembly extending into the inside of the valve cover (2), and the lubrication box (51) being distributed in a mirror image on the outside of the valve body (1); A packing (22) is provided at the top of the inner side of the handle (21), and the packing (22) is slidably connected to the outer side of the valve stem (3).

2. A gate valve that is easy to open and close according to claim 1, characterized in that: The lubrication assembly comprises a lubrication tube (53) and a lubrication strip (54); the lubrication tube (53) is arranged inside the handle (21); a lubrication strip (54) is arranged inside the lubrication tube (53); one end of the lubrication strip (54) is located inside the valve cover (2); the other end of the lubrication strip (54) is located inside the lubrication cavity; a lubrication ring (55) is arranged at one end of the lubrication strip (54) located inside the valve cover (2); and the lubrication ring (55) is slidably connected to the valve stem (3).

3. A gate valve that is easy to open and close according to claim 1, characterized in that: The gate plate (4) comprises a mounting plate (41), a top plate (42), a combination disk (43) and a reinforcement block (44); the top of the mounting plate (41) is provided with a top plate (42); the top surface of the top plate (42) is provided with a combination disk (43); the outer side of the top of the mounting plate (41) is provided with a reinforcement block (44); the reinforcement block (44) and the top plate (42) are both engaged and slidably engaged with the inside of the valve cover (2) and the inside of the valve body (1).

4. A gate valve that is easy to open and close according to claim 1, characterized in that: The bottom end of the valve stem (3) is provided with a connecting plate (31), and the connecting plate (31) is fixedly welded to the combined plate (43).

5. The gate valve that is easy to open and close according to claim 3 is characterized in that: A mounting ring (45) is provided on the outer side of the bottom of the mounting plate (41), a valve cover plate (46) is provided on the outer side of the mounting ring (45), a support plate (47) is provided inside the mounting ring (45), the support plate (47) is an elastic structure, and the mounting ring (45) is threadedly connected to the valve cover plate (46).

6. A gate valve that is easy to open and close according to claim 5, characterized in that: The mounting ring (45), the valve cover plate (46) and the support plate (47) are arranged in a corresponding manner, and the mounting ring (45), the valve cover plate (46) and the support plate (47) are distributed in a mirror image on the outer side of the mounting plate (41).

7. A gate valve that is easy to open and close according to claim 6, characterized in that: The valve cover plate (46) is provided with a sealing inclined surface on its side, and the sealing inclined surface slides in contact with the valve seat (11).

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