Gate valve

Abstract

The invention discloses a gate valve which comprises a valve body, an adjusting seat, a valve rod, a built-in nut and a gate plate unit. The valve body comprises a channel pipe and a fixed shell, the fixed shell is fixedly connected to the channel pipe in a sealed mode, and the channel pipe is provided with a channel and a communicating connecting hole. The adjusting seat is screwed in the fixed shell, the adjusting seat is provided with a through hole, and the through hole comprises a first hole section and a large hole part diameter and is provided with an outward step surface; the valve rod is provided with a convex shoulder, the valve rod can rotationally penetrate through the adjusting seat and is provided with an extending section, the convex shoulder is located in the through hole of the adjusting seat, and the inner shoulder surface of the convex shoulder is supported on the step surface; the built-in nut is in threaded connection with the large hole part of the adjusting seat and is in supporting connection with the outer shoulder surface of the convex shoulder; the gate plate unit is in threaded connection with the extending section of the valve rod, the valve rod rotates to drive the valve plate to slide inside and outside, and the channel is controlled through inside and outside sliding of the valve plate. The rotation stopping device has the advantages of being compact in structure, low in height, simple and firm in structure and good in rotation stopping effect.

Description

TECHNICAL FIELD

[0001] The present application relates to valve mechanism, especially relates to a gate valve. BACKGROUND

[0002] The existing gate valve, such as CN2709727Y, CN203604691U, CN207268310, CN206754426U, it includes valve body, gate, valve stem, lower valve cover, valve cover nut, connecting sleeve and lockable valve cover, the gate is installed in the valve body through the guide groove, and is connected with the valve stem through the gate nut, the gate valve can be lifted up and down to open and close the gate valve;The lower valve cover is arranged above the valve body, the connecting sleeve is connected with the lower valve cover through the thread, the lockable valve cover is actively connected with the connecting sleeve through the positioning pin, the positioning pin is arranged in the annular track of the connecting sleeve, the lockable valve cover can rotate around the connecting sleeve, the connecting sleeve is installed and positioned through the shoulder step of the valve stem nut;The valve stem is connected with the lower valve cover through the valve cover nut, the valve stem is connected with the lockable valve cover by setting a square head on the top, a lockable mechanism is arranged between the lower valve cover and the lockable valve cover, the lockable mechanism is connected with the connecting sleeve and the lower valve cover, and the lockable gate valve is formed.The height of the gate valve includes the valve body, the fixed shell on the valve body, the lower valve cover, the connecting sleeve and the lockable valve cover from bottom to top, the height is higher, and the structure is complex, so there is room for improvement. SUMMARY

[0003] The present application provides a gate valve, which overcomes the deficiencies of the gate valve in the background art.

[0004] The technical scheme adopted by the present application to solve its technical problems is: a gate valve, comprising:

[0005] A valve body (1) comprising a channel pipe (11) and a fixed shell (12), the fixed shell (12) being sealingly and fixedly connected to the channel pipe (11), the channel pipe (11) being provided with a channel (111) and a connecting hole (112) connecting the channel (111) and an inner cavity of the fixed shell (12);

[0006] An adjusting seat (2) being screwed in the fixed shell (12), the adjusting seat (2) being provided with a through hole, the through hole comprising a first hole section (21) and a large hole part, the first hole section (21) having a smaller hole diameter than the large hole part and a first stepped surface facing outward;

[0007] A valve stem (3) being provided with a shoulder (31), the valve stem (3) being capable of rotating through the adjusting seat (2) and having an extended section (32) extending out of the adjusting seat (2), the shoulder (31) being located in the through hole of the adjusting seat (2) and an inner shoulder surface of the shoulder (31) being supported on the first stepped surface;

[0008] A built-in nut (4) being threadedly connected to the large hole part of the adjusting seat (2) and supported and connected to an outer shoulder surface of the shoulder (31); and

[0009] The gate plate unit (5) is slidably connected to the valve body (1) in the inner-outer direction and is threadedly connected to the extended section (32) of the valve stem (3). The valve plate (5) is driven to slide in the inner-outer direction by the rotation of the valve stem (3), and the passage (111) is controlled by the sliding of the valve plate (5).

[0010] In an embodiment: the gate plate unit (5) comprises two spaced gate plates (51), an arc-shaped plate (52) fixed between the two gate plates (51), and a rotating column (53) fixed to the outer side wall of the arc-shaped plate (52). The rotating column (53) is provided with a through hole passing from the outer end surface to the inner side wall of the arc-shaped plate (52), and the rotating column (53) is screwed into the internal thread of the valve stem (3) through the through hole. The passage (111) has a water inlet, a water outlet, and a control section (113) connected between the water inlet and the water outlet. The connecting hole (112) and the control section (113) are aligned and connected. The gate plate unit (5) slides in the inner-outer direction relative to the valve body (1) between a sealing position and an open position. The two gate plates (51) in the sealing position seal the inner ports of the water inlet and the water outlet, respectively.

[0011] In an embodiment: the two gate plates (51) form an upper-large-lower-small "8" shape structure, and the inner end surfaces of the water inlet and the water outlet form an upper-large-lower-small "8" shape. The two gate plates (51) in the sealing position seal the inner end surfaces of the water inlet and the water outlet, respectively.

[0012] In an embodiment: the arc-shaped plate (52) is provided with a sliding block (521) on the outer convex surface. The valve body (1) is provided with a sliding groove (13), and the sliding block (521) is slidably connected to the sliding groove (13).

[0013] In an embodiment: the inner port periphery of the water inlet and the water outlet extends inwardly to form a necked structure (114).

[0014] In an embodiment: the large hole part of the adjusting seat (2) comprises a second hole section (22) and a third hole section (23). The third hole section (23), the second hole section (22), and the first hole section (21) are coaxially arranged from the outside to the inside, and the hole diameters decrease from large to small. The third hole section (23) and the second hole section (22) have a second stepped surface facing outwardly. The built-in nut (4) is supported against the second stepped surface.

[0015] In an embodiment: a gasket (33) is arranged between the inner shoulder surface of the shoulder (31) of the valve stem (3) and the first stepped surface.

[0016] In one embodiment: a first sealing ring (34) is provided between the shoulder (31) and the large hole; the upper part of the solid shell (12) is provided with an enlarged hole (121) and has an outward third stepped surface; the adjusting seat (2) includes a threaded part (24) and a reduced diameter part (25), the reduced diameter part (25) and the threaded part (24) are coaxially fixed together and the outer diameter of the reduced diameter part (25) is smaller than the outer diameter of the threaded part (24); the threaded part (24) is threadedly connected to the enlarged hole (121); the reduced diameter part (25) is adapted to be connected inside the solid shell (12); and a second sealing ring (26) is provided between the reduced diameter part (25) and the solid shell (12).

[0017] One embodiment also includes:

[0018] End cap (6) is synchronously rotatably connected to the outer end of valve stem (3). End cap (6) can rotate to contact the outer end face of solid shell (12) and cover adjustment seat (2).

[0019] In one embodiment: the valve body (1), adjusting seat (2), valve stem (3), built-in nut (4), and gate unit (5) are made of plastic; the gasket (33) is made of polytetrafluoroethylene.

[0020] Compared with the prior art, this technical solution has the following advantages: the adjusting seat is screwed into the solid shell of the valve body, the valve stem can rotate through the adjusting seat, the valve stem is locked by the adjusting seat and the built-in nut, the gate unit is threaded to the extended section of the valve stem, and the channel is controlled by the sliding inside and outside of the valve plate. The structure is compact, low in height, simple and reliable, and has a good anti-rotation effect.

[0021] The gate unit includes two gates, an arc-shaped plate, and a rotating column. The valve stem is threaded through the inner hole of the rotating column. The rotation of the valve stem controls the sliding of the two gates inward and outward. The two gates are respectively engaged with the inner ports of the inlet and outlet to control the opening and closing of the valve. On the one hand, the arc-shaped plate is fixed between the two gates so that the ends of the two gates are suspended and have a certain elasticity. The elasticity enhances the sealing performance of the gates and the inlet and outlet. On the other hand, the rotating column is fixed to the arc-shaped plate for easy assembly.

[0022] The two gates form an "eight" shape, with the upper part larger than the lower part. The inner end faces of the inlet and outlet form an "eight" shape, with the upper part larger than the lower part. The two gates in the sealing position seal the inner end faces of the inlet and outlet respectively, which facilitates sliding and enhances the sealing performance.

[0023] The arc-shaped plate has a protruding slider, and the valve body has a sliding groove. The slider slides into the groove. On the one hand, it guides the sliding of the gate in and out, reduces the gate's shaking, and enhances stability. On the other hand, the slider is located on the arc-shaped plate to avoid affecting the sealing performance of the gate and the valve body.

[0024] The inner edges of the inlet and outlet extend inward to form a constricted structure. When the inner end face of the inlet and outlet is sealed with the gate, the constricted structure can enhance the sealing performance.

[0025] The built-in nut is screwed into the third hole section and supported against the second stepped surface, which enhances the connection strength of the valve stem and makes the structure compact.

[0026] The adjusting seat includes a threaded part and a reduced diameter part. The threaded part is threaded into the enlarged hole of the solid shell, and the reduced diameter part is adapted to be connected inside the solid shell. A second sealing ring is provided between the reduced diameter part and the solid shell. The sealing is pre-sealed, isolating the medium in advance and providing excellent sealing performance.

[0027] A pad is placed between the inner shoulder surface of the valve stem shoulder and the first stepped surface to reduce resistance and improve wear resistance.

[0028] It also includes an end cap, which is synchronously rotatably connected to the outer end of the valve stem. The end cap can rotate to contact the outer end face of the solid shell and cover the adjusting seat. The new appearance design is beautiful and easy to operate, preventing the built-in nut and adjusting seat from loosening.

[0029] The valve body, regulating seat, valve stem, built-in nut, and gate unit are made of plastic, and the gasket is made of polytetrafluoroethylene (PTFE), featuring an all-plastic structure design. Attached Figure Description

[0030] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0031] Figure 1 This is a three-dimensional schematic diagram of a gate valve in a specific implementation method;

[0032] Figure 2 This is one of the three-dimensional exploded view diagrams of a gate valve in a specific implementation method;

[0033] Figure 3 This is the second three-dimensional exploded view of the gate valve in a specific implementation method;

[0034] Figure 4 This is the third three-dimensional exploded view of the gate valve in a specific implementation method;

[0035] Figure 5 This is one of the schematic diagrams of the first longitudinal section of the gate valve in a specific implementation method, with the gate valve in the closed state;

[0036] Figure 6 This is the second schematic diagram of the first longitudinal section of the gate valve in the specific implementation method, with the gate valve in the closed state;

[0037] Figure 7 This is a schematic diagram of the second longitudinal section of the gate valve in a specific implementation method.

[0038] Labeling: Valve body 1, channel pipe 11, channel 111, connecting hole 112, control section 113, solid shell 12, enlarged hole 121, slide groove 13; Adjusting seat 2, first hole section 21, second hole section 22, third hole section 23, threaded part 24, reduced diameter part 25, second sealing ring 26; Valve stem 3, shoulder 31, extended section 32, gasket 33, first sealing ring 34; Built-in nut 4; Gate unit 5, gate 51, arc plate 52, slider 521, rotating column 53; End cap 6. Detailed Implementation

[0039] Please refer to Figures 1 to 7 The gate valve includes a valve body 1, an adjusting seat 2, a valve stem 3, an internal nut 4, a gate unit 5, and an end cap 6. The valve body 1, adjusting seat 2, valve stem 3, internal nut 4, gate unit 5, and end cap 6 are made of plastic.

[0040] The valve body 1 includes a channel pipe 11 and a solid shell 12. The solid shell 12 is sealed and fixedly connected to the channel pipe 11. The channel pipe 11 is provided with a channel 111 and a connecting hole 112 that connects the channel 111 and the inner cavity of the solid shell 12. That is, the connecting hole 112 is located inside the solid shell 12. The channel 111 has an inlet, an outlet, and a control section 113 that connects the inlet and the outlet. The connecting hole 112 and the control section 113 are aligned and connected.

[0041] The adjusting seat 2 is screwed into the solid shell 12. The adjusting seat 2 is provided with a through hole, which includes a first hole section 21 and a large hole portion. The large hole portion includes a second hole section 22 and a third hole section 23. The third hole section 23, the second hole section 22 and the first hole section 21 are arranged coaxially with their diameters decreasing from large to small. The arrangement of the outer and inner holes is shown in the vertical direction in the figure. The diameter of the first hole section 21 is smaller than that of the large hole portion and has an outward-facing first stepped surface. The third hole section 23 and the second hole section 22 have an outward-facing second stepped surface. The upper part of the solid shell 12 is provided with an enlarged hole 121 and has an outward-facing third stepped surface. The adjusting seat 2 includes a threaded part 24 and a reduced diameter part 25. The reduced diameter part 25 and the threaded part 24 are coaxially fixed together, and the outer diameter of the reduced diameter part 25 is smaller than the outer diameter of the threaded part 24. The threaded part 24 is threadedly connected to the enlarged hole 121. The reduced diameter part 25 is adapted to be connected inside the solid shell 12. A second sealing ring 26 is provided between the reduced diameter part 25 and the solid shell 12. The adjusting seat is designed with a pre-sealed design to isolate the medium in advance.

[0042] The valve stem 3 has a shoulder 31, which can rotate through the adjusting seat 2 and has an extension section 32 extending out of the adjusting seat 2. The shoulder 31 is located in the through hole of the adjusting seat 2, and the inner shoulder surface of the shoulder 31 is supported by the first stepped surface. A gasket 33 is provided between the inner shoulder surface of the shoulder 31 and the first stepped surface. The gasket 33 is made of polytetrafluoroethylene (PTFE). The valve stem and the adjusting seat are isolated by the PTFE gasket design to reduce resistance and improve wear resistance. Two first sealing rings 34 are provided axially spaced between the shoulder 31 and the second hole section 22, adopting a double sealing structure design to improve sealing performance and service life.

[0043] The built-in nut 4 is threaded into the third hole section 23 of the adjusting seat 2. The built-in nut 4 rests against the second stepped surface and is supported on the outer shoulder surface of the shoulder 31. The adjusting seat is threaded into the solid shell, and the built-in nut is threaded into the adjusting seat to achieve anti-rotation. As needed, the built-in nut and the adjusting seat can be made of different materials to enhance the anti-rotation structure.

[0044] The gate unit 5 is slidably connected to the valve body 1 in the inward and outward directions and is threadedly connected to the extended section 32 of the valve stem 3. The rotation of the valve stem 3 drives the valve plate 5 to slide inward and outward, as shown in the up-down direction. The sliding of the valve plate 5 controls the closure or flow rate of the channel 111. Figure 5 and Figure 6 As shown.

[0045] In this embodiment, the gate unit 5 includes two gates 51 arranged at intervals, an arc-shaped plate 52 fixed between the upper parts of the two gates 51, and a rotating column 53 fixed to the outer wall of the arc-shaped plate 52. The rotating column 53 is provided with a through hole from the outer end face to the inner wall of the arc-shaped plate 52. The rotating column 53 is threaded into the internal thread of the valve stem 3 through the through hole. The gate unit 5 slides in and out relative to the valve body 1 between the sealed position and the open position. The two gates 51 in the sealed position seal the inner ports of the inlet and outlet respectively. To enhance sealing performance: 1. The two gates 51 form an "eight" shape with the upper part larger than the lower part. The inner end faces of the inlet and outlet form an "eight" shape with the upper part larger than the lower part. The two gates 51 in the sealing position seal the inner end faces of the inlet and outlet respectively; 2. The inner port of the inlet and outlet extends inward to form a constricted structure 114. Due to the extension, an upward-facing groove is formed at the bottom of the control section. The groove is adapted to the lower part of the gate unit 5.

[0046] The gate unit 5 has a protruding slider 521, and the valve body 1 has a sliding groove 13. The slider 521 slides in the sliding groove 13 to guide the raising and lowering of the gate, reduce gate swaying, and enhance stability. The slider 521 may also protrude from the arc-shaped plate 52.

[0047] The end cap 6 is synchronously rotatably connected to the outer end of the valve stem 3. The end cap 6 can rotatably contact the outer end face of the solid shell 12 and cover the adjusting seat 2. Specifically, a connecting post protrudes from the center of the end cap, and the top of the valve stem is inserted into the connecting post, forming a non-rotatable structure. Thus, rotating the end cap will drive the valve stem to rotate. The integrated handle and the brand-new valve body appearance design are more in line with industrial aesthetics.

[0048] The above description is merely a preferred embodiment of the present invention, and therefore should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made in accordance with the scope of the patent and the contents of the specification should still fall within the scope of the present invention.

Claims

1. A gate valve, characterized in that: include: The valve body (1) includes a channel pipe (11) and a solid shell (12). The solid shell (12) is sealed and fixed to the channel pipe (11). The channel pipe (11) is provided with a channel (111) and a connecting hole (112) connecting the channel (111) and the inner cavity of the solid shell (12). Adjustment seat (2) is screwed into solid shell (12). The adjustment seat (2) is provided with a through hole. The through hole includes a first hole section (21) and a large hole. The diameter of the first hole section (21) is smaller than that of the large hole and has an outward-facing first stepped surface. The valve stem (3) is provided with a shoulder (31). The valve stem (3) can rotate through the adjusting seat (2) and has an extension section (32) extending out of the adjusting seat (2). The shoulder (31) is located in the through hole of the adjusting seat (2) and the inner shoulder surface of the shoulder (31) is supported on the first stepped surface. The built-in nut (4) is threaded into the large hole of the adjusting seat (2) and supported on the outer shoulder surface of the shoulder (31); and The gate unit (5) is slidably connected to the valve body (1) in the inward and outward directions and is threadedly connected to the protruding section (32) of the valve stem (3). The valve plate (5) is driven to slide inward and outward by the rotation of the valve stem (3), and the channel (111) is controlled by the sliding of the valve plate (5).

2. The gate valve according to claim 1, characterized in that: The gate unit (5) includes two gates (51) arranged at intervals, an arc plate (52) fixed between the two gates (51), and a rotating column (53) fixed to the outer wall of the arc plate (52). The rotating column (53) is provided with a through hole from the outer end face to the inner wall of the arc plate (52). The rotating column (53) is provided with an internal thread screwed to the valve stem (3) through the through hole. The channel (111) has an inlet, an outlet, and a control section (113) connecting the inlet and the outlet. The connecting hole (112) and the control section (113) are aligned and connected. The gate unit (5) slides in and out relative to the valve body (1) between the sealed position and the open position. The two gates (51) in the sealed position seal the inner ports of the inlet and the outlet, respectively.

3. The gate valve according to claim 2, characterized in that: The two gates (51) form an "eight" shape with the upper part larger than the lower part. The inner end faces of the inlet and outlet form an "eight" shape with the upper part larger than the lower part. The two gates (51) in the sealing position seal the inner end faces of the inlet and outlet respectively.

4. The gate valve according to claim 2, characterized in that: The arc plate (52) has a protruding slider (521), and the valve body (1) has a sliding groove (13). The slider (521) slides in the sliding groove (13).

5. The gate valve according to claim 2, characterized in that: The inner periphery of the inlet and outlet extends inward to form a constricted structure (114).

6. The gate valve according to any one of claims 1 to 5, characterized in that: The large hole portion of the adjusting seat (2) includes a second hole section (22) and a third hole section (23). The third hole section (23), the second hole section (22) and the first hole section (21) are arranged coaxially with the outer and inner sides and the hole diameters decrease from large to small. There is an outward second stepped surface between the third hole section (23) and the second hole section (22). The built-in nut (4) is screwed into the third hole section (23) and rests against the second stepped surface.

7. The gate valve according to claim 6, characterized in that: A pad (33) is provided between the inner shoulder surface and the first step surface of the valve stem (3) shoulder (31).

8. The gate valve according to any one of claims 1 to 5, characterized in that: A first sealing ring (34) is provided between the shoulder (31) and the large hole; the upper part of the solid shell (12) is provided with an enlarged hole (121) and has an outward third stepped surface; the adjusting seat (2) includes a threaded part (24) and a reduced diameter part (25), the reduced diameter part (25) and the threaded part (24) are coaxially fixed together and the outer diameter of the reduced diameter part (25) is smaller than the outer diameter of the threaded part (24), the threaded part (24) is threaded to the enlarged hole (121), the reduced diameter part (25) is adapted to be connected inside the solid shell (12), and a second sealing ring (26) is provided between the reduced diameter part (25) and the solid shell (12).

9. The gate valve according to any one of claims 1 to 5, characterized in that: Also includes: End cap (6) is synchronously rotatably connected to the outer end of valve stem (3). End cap (6) can rotate to contact the outer end face of solid shell (12) and cover adjustment seat (2).

10. The gate valve according to claim 7, characterized in that: The valve body (1), adjusting seat (2), valve stem (3), built-in nut (4), and gate unit (5) are made of plastic; the gasket (33) is made of polytetrafluoroethylene.

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