Gate valve with flexible protection mechanism

Abstract

The utility model relates to the field of gate valves, in particular to a gate valve with a flexible protection mechanism, which comprises a valve body, a valve cover arranged on the upper side of the valve body, a valve rod arranged on the inner side of the valve cover, a valve plate arranged on the outer side of the valve rod and slidably connected to the inner side of the valve body, a support arranged on the outer side of the valve rod, and a hand wheel fixedly connected to the outer side of the valve rod. The hand wheel is arranged on the upper side of the support, a protection mechanism is arranged on the outer side of the valve plate and comprises a rubber ring arranged on the outer side of the valve plate, a rubber layer is arranged on the side, away from the valve plate, of the rubber ring, and a filling cotton block and a pressing plate are fixedly connected to the inner side of the rubber ring. The pressing plate and the filling cotton block can continuously apply pressure to one side, a gap between the valve body and the valve plate is filled, the sealing performance of the valve body and the valve plate in the using process is improved, the overall stability of the structure can be improved through the bonding design between the filling cotton block and the pressing plate, and direct friction between the valve plate and the valve body is further relieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of gate valves, and in particular relates to a gate valve with a flexible protective mechanism. Background Art

[0002] A gate valve is a common fluid control valve, primarily used to fully open or close fluid flow rather than regulate flow. It controls the flow of fluid by moving a lift valve plate (commonly called a gate) up and down between valve seats. Generally, a gate valve is composed of a valve body, valve seat, valve plate, valve stem, bracket, screw, and runner. In a gate valve, a flexible protective mechanism, sometimes called a flexible sealing mechanism or flexible protective structure, is a structure designed to improve the sealing performance and life of the gate valve. Typically, this structure allows the valve plate or sealing assembly to have a certain degree of elasticity or flexibility during operation, allowing it to better adapt to changes in the valve seat or sealing surface.

[0003] After searching, in the prior art, Chinese patent announcement number: CN207246458U, authorization date: 2018-04-17, discloses a gate valve, including a valve body, a valve seat, a valve stem, a valve cover, a gate plate and a valve cover nut. The gate plate is provided with an annular groove, and a gasket is provided on the annular groove. The gasket abuts against the bottom of the valve stem. The valve cover is fixed to the valve body by a valve cover nut. A locking plate is also provided between the valve cover nut and the valve cover. This gate valve has the characteristics of simple structure, easy installation and maintenance, and good sealing effect.

[0004] However, the device still has the following defects: although it can effectively improve the spot welding and threaded hole connection methods used in the existing valve cover nuts, it is not convenient and tight enough. However, after long-term use, the surface of the valve plate will be worn over time, or due to the influence of the environment and liquid temperature during use, slight thermal expansion and contraction will occur, which may cause a small gap between the valve plate and the valve seat sealing surface, thereby affecting the sealing of the valve body. Utility Model Content

[0005] In response to the above problems, the present invention provides a gate valve with a flexible protective mechanism, comprising a valve body, a valve cover provided on the upper side of the valve body, a valve stem provided on the inner side of the valve cover, a valve plate provided on the outer side of the valve stem, and the valve plate is slidably connected to the inner side of the valve body, a bracket is further provided on the outer side of the valve stem, a hand wheel is fixedly connected to the outer side of the valve stem, the hand wheel is provided on the upper side of the bracket, and a protective mechanism is provided on the outer side of the valve plate;

[0006] The protective mechanism includes a rubber ring arranged on the outside of the valve plate, a rubber layer is provided on the side of the rubber ring away from the valve plate, a filling cotton block and a pressure plate are fixedly connected to the inner side of the rubber ring, the filling cotton block and the pressure plate are both arranged on the side of the rubber layer close to the valve plate, the filling cotton block and the pressure plate are bonded to each other, a spring and a leaf spring are fixedly connected to one side of the valve plate, and the spring and the leaf spring are fixedly connected to the pressure plate on the side away from the valve plate.

[0007] Furthermore, one side of the rubber layer is fixedly connected to a top plate, one side of the top plate is fixedly connected to the filling cotton block, and the top plate is arranged between the rubber layer and the filling cotton block.

[0008] Furthermore, a slider is fixedly connected to one side of the top plate close to the valve plate, a hollow block is fixedly connected to one side of the valve plate, and the slider is slidably connected to the inner side of the hollow block.

[0009] Furthermore, a rebound rubber block is fixedly connected to one side of the pressure plate, and a side of the rebound rubber block away from the pressure plate is fixedly connected to the valve plate.

[0010] Furthermore, a rebound sponge block is provided on the inner side of the rubber ring, one side of the rebound sponge block is fixedly connected to the valve plate, and the rebound sponge block is provided on the outside of the leaf spring, the spring and the hollow block.

[0011] Furthermore, a plurality of springs are provided, and the plurality of springs are arranged in a circular array with the center of the rubber ring as the center.

[0012] Furthermore, four leaf springs are provided, with two leaf springs forming a group, and the two groups of leaf springs are symmetrically arranged with the central axis of the rubber ring as the center.

[0013] Furthermore, a plurality of the rebound rubber blocks are provided, and the number of the plurality of rebound rubber blocks is the same as the number of the plurality of springs. The springs are sleeved on the outside of the rebound rubber blocks, and the plurality of springs correspond to the plurality of leaf springs one-to-one.

[0014] The beneficial effects of the utility model are:

[0015] 1. In this device, through the elastic thrust of the spring and leaf spring, the pressure plate and the filling cotton block can continuously apply pressure to one side, filling the gap between the valve body and the valve plate, increasing the sealing performance of the valve body and the valve plate during use. The bonding design between the filling cotton block and the pressure plate can increase the overall stability of the structure and further alleviate the direct friction between the valve plate and the valve body.

[0016] 2. The rubber layer in this device plays a very good protective role. It not only provides elasticity and pressure during the sealing process, but also prevents impurities in the liquid from causing wear on the surface of the valve plate. The filling cotton block provides a soft buffer layer, further reducing the wear of the structure, thereby effectively extending the service life of the valve.

[0017] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be achieved and obtained by the structures indicated in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 Shows a structural main body diagram according to an embodiment of the present utility model;

[0020] Figure 2 It shows a schematic structural diagram of the rubber ring and the valve plate according to an embodiment of the present utility model;

[0021] Figure 3 Shows a schematic structural diagram of a leaf spring according to an embodiment of the present utility model;

[0022] Figure 4 It shows a schematic structural diagram of a rebound sponge block according to an embodiment of the present utility model;

[0023] Figure 5 A schematic structural diagram of a pressure plate and a spring according to an embodiment of the present utility model is shown;

[0024] Figure 6 A schematic cross-sectional structural diagram of a top plate according to an embodiment of the present utility model is shown.

[0025] In the figure: 1. Valve body; 21. Valve cover; 22. Bracket; 23. Handwheel; 24. Valve stem; 25. Valve plate; 3. Protective mechanism; 31. Rubber ring; 32. Rubber layer; 33. Filling cotton block; 34. Pressure plate; 35. Spring; 36. Leaf spring; 4. Top plate; 51. Hollow block; 52. Slider; 6. Rebound rubber block; 7. Rebound sponge block. DETAILED DESCRIPTION

[0026] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0027] The present invention provides a gate valve with a flexible protection mechanism, including a valve body 1, exemplarily, as shown in FIG. Figures 1-6 shown.

[0028] A valve cover 21 is provided on the upper side of the valve body 1, a valve stem 24 is provided on the inner side of the valve cover 21, a valve plate 25 is provided on the outer side of the valve stem 24, and the valve plate 25 is slidably connected to the inner side of the valve body 1, a bracket 22 is also provided on the outer side of the valve stem 24, a hand wheel 23 is fixedly connected to the outer side of the valve stem 24, and the hand wheel 23 is provided on the upper side of the bracket 22, and a protective mechanism 3 is provided on the outer side of the valve plate 25.

[0029] The protection mechanism 3 includes a rubber ring 31 arranged on the outside of the valve plate 25, and a rubber layer 32 is provided on the side of the rubber ring 31 away from the valve plate 25. A filling cotton block 33 and a pressure plate 34 are fixedly connected to the inner side of the rubber ring 31. The filling cotton block 33 and the pressure plate 34 are both arranged on the side of the rubber layer 32 close to the valve plate 25. The filling cotton block 33 and the pressure plate 34 are bonded to each other. A spring 35 and a leaf spring 36 are fixedly connected to one side of the valve plate 25, and the spring 35 and the leaf spring 36 are fixedly connected to the pressure plate 34 on the side away from the valve plate 25.

[0030] One side of the rubber layer 32 is fixedly connected to the top plate 4 , one side of the top plate 4 is fixedly connected to the filling cotton block 33 , and the top plate 4 is disposed between the rubber layer 32 and the filling cotton block 33 .

[0031] Specifically, through the elastic thrust of the spring 35 and the leaf spring 36, the pressure plate 34 and the filling cotton block 33 can continuously apply pressure to one side, filling the gap between the valve body 1 and the valve plate 25, thereby improving the sealing performance of the valve body 1 and the valve plate 25 during use. The bonding design between the filling cotton block 33 and the pressure plate 34 can increase the overall stability of the structure and further alleviate the direct friction between the valve plate 25 and the valve body 1.

[0032] In addition, the rubber layer 32 plays a very good protective role. It not only provides elasticity and pressure during the sealing process, but also prevents impurities in the liquid from causing wear on the surface of the valve plate 25. The filling cotton block 33 provides a soft buffer layer, further reducing the wear of the structure, thereby effectively extending the service life of the valve.

[0033] In addition, by setting the top plate 4, the rubber layer 32 can maintain good flatness during use and is not prone to unevenness. This not only improves the durability of the rubber layer 32, but also reduces uneven sealing, helps the valve to operate smoothly during opening and closing, and maintains the integrity of the sealing surface.

[0034] The top plate 4 is fixedly connected to a side of the valve plate 25 with a slider 52, and the valve plate 25 is fixedly connected to a side of the hollow block 51. The slider 52 is slidably connected to the inner side of the hollow block 51. Figures 1-6 shown.

[0035] A rebound rubber block 6 is fixedly connected to one side of the pressure plate 34 , and a side of the rebound rubber block 6 away from the pressure plate 34 is fixedly connected to the valve plate 25 .

[0036] A rebound sponge block 7 is provided on the inner side of the rubber ring 31 . One side of the rebound sponge block 7 is fixedly connected to the valve plate 25 , and the rebound sponge block 7 is provided on the outer side of the leaf spring 36 , the spring 35 and the hollow block 51 .

[0037] Specifically, the hollow block 51 can limit the expansion and contraction of the rubber layer 32 to a certain extent through the connection between the hollow block 51 and the slider 52, and the connection between the slider 52 and the top plate 4. When the rubber layer 32 fills the gap between the valve body 1 and the valve plate 25, the movement of the rubber layer 32 can be sufficiently stable, and it is not easy to have unevenness in some parts.

[0038] In addition, the rebound rubber block 6 can play a certain auxiliary role in the elastic extrusion of the spring 35, and the rebound sponge block 7 can fill the inside of the rubber ring 31, so that the leaf spring 36, spring 35 and rebound rubber block 6 can be sufficiently stable during use, and the elastic filling effect of the rubber ring 31 is better.

[0039] The springs 35 are provided in plurality, and the plurality of springs 35 are arranged in a circular array with the center of the rubber ring 31 as the center. Figures 1-6 shown.

[0040] Four leaf springs 36 are provided, with two leaf springs 36 forming a group. The two groups of leaf springs 36 are symmetrically arranged with the central axis of the rubber ring 31 as the center.

[0041] There are multiple rebound rubber blocks 6 , and the number of the multiple rebound rubber blocks 6 is the same as the number of the multiple springs 35 . The springs 35 are sleeved on the outside of the rebound rubber blocks 6 , and the multiple springs 35 correspond to the multiple leaf springs 36 one by one.

[0042] Specifically, the circumferential array arrangement of the springs 35 makes the elastic filling effect of the rubber layer 32 better and more uniform, and the symmetrical arrangement of the leaf springs 36 can not only further increase the filling effect at the center of the rubber layer 32, but also effectively increase the stability of the rubber layer 32 during use. The springs 35 are arranged on the outside of the rebound rubber block 6, so that the multiple rebound rubber blocks 6 can limit the multiple springs 35, while providing them with elastic assistance, and can reduce the possibility of bending and deformation of the springs 35.

[0043] The gate valve with a flexible protective mechanism proposed by the embodiment of the present invention has the following working principle: when the device is in use, the valve plate 25 can move up and down normally through the valve stem 24 to achieve the control of the circulation and closing of the liquid. At the same time, the rubber ring 31 and the rubber layer 32 can not only reduce the wear of the valve plate 25 by impurities in the liquid, but also fill the gap between the valve body 1 and the valve plate 25. While the rubber layer 32 plays a filling role, the spring 35 and the leaf spring 36 can make the gap between the rubber layer 32 and the valve body 1 contact more closely through their own elasticity. The rebound rubber block 6 can also play the role of assisting the leaf spring 36, so that the top plate 4 can drive the rubber layer 32 to move, which not only increases the stability of the rubber layer 32 during use, but also reduces the unevenness on one side of the rubber layer 32. At the same time, when the pressure plate 34 is pushed by the spring 35 and the leaf spring 36, it can also squeeze the filling cotton block 33, thereby increasing the flexibility of the protective mechanism 3 during use, thereby effectively reducing the outflow of liquid from the gap between the valve body 1 and the valve plate 25.

[0044] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A gate valve with a flexible protective mechanism, comprising a valve body (1), characterized in that: A valve cover (21) is provided on the upper side of the valve body (1), a valve stem (24) is provided on the inner side of the valve cover (21), a valve plate (25) is provided on the outer side of the valve stem (24), and the valve plate (25) is slidably connected to the inner side of the valve body (1), a bracket (22) is further provided on the outer side of the valve stem (24), a hand wheel (23) is fixedly connected to the outer side of the valve stem (24), and the hand wheel (23) is provided on the upper side of the bracket (22), and a protective mechanism (3) is provided on the outer side of the valve plate (25); The protective mechanism (3) includes a rubber ring (31) arranged on the outside of the valve plate (25), a rubber layer (32) is arranged on the side of the rubber ring (31) away from the valve plate (25), a filling cotton block (33) and a pressure plate (34) are fixedly connected on the inner side of the rubber ring (31), the filling cotton block (33) and the pressure plate (34) are both arranged on the side of the rubber layer (32) close to the valve plate (25), the filling cotton block (33) and the pressure plate (34) are bonded to each other, a spring (35) and a leaf spring (36) are fixedly connected to one side of the valve plate (25), and the spring (35) and the leaf spring (36) are fixedly connected to the pressure plate (34) on the side away from the valve plate (25).

2. A gate valve with a flexible protective mechanism according to claim 1, characterized in that: One side of the rubber layer (32) is fixedly connected to a top plate (4), one side of the top plate (4) is fixedly connected to a filling cotton block (33), and the top plate (4) is arranged between the rubber layer (32) and the filling cotton block (33).

3. The gate valve with a flexible protective mechanism according to claim 2, characterized in that: A slider (52) is fixedly connected to one side of the top plate (4) close to the valve plate (25), a hollow block (51) is fixedly connected to one side of the valve plate (25), and the slider (52) is slidably connected to the inner side of the hollow block (51).

4. The gate valve with a flexible protective mechanism according to claim 3, characterized in that: A rebound rubber block (6) is fixedly connected to one side of the pressure plate (34), and a side of the rebound rubber block (6) away from the pressure plate (34) is fixedly connected to the valve plate (25).

5. The gate valve with a flexible protective mechanism according to claim 4, characterized in that: A rebound sponge block (7) is provided on the inner side of the rubber ring (31), one side of the rebound sponge block (7) is fixedly connected to the valve plate (25), and the rebound sponge block (7) is provided on the outer side of the leaf spring (36), the spring (35) and the hollow block (51).

6. The gate valve with a flexible protective mechanism according to claim 3, characterized in that: The springs (35) are provided in plurality, and the plurality of springs (35) are arranged in a circular array with the center of the rubber ring (31) as the center.

7. The gate valve with a flexible protective mechanism according to claim 5, characterized in that: Four leaf springs (36) are provided, and each two leaf springs (36) form a group. The two groups of leaf springs (36) are symmetrically arranged with the central axis of the rubber ring (31) as the center.

8. The gate valve with a flexible protective mechanism according to claim 4, characterized in that: The rebound rubber blocks (6) are provided in plurality, and the number of the rebound rubber blocks (6) is the same as the number of the springs (35). The springs (35) are sleeved on the outside of the rebound rubber blocks (6), and the springs (35) correspond one to one with the leaf springs (36).

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