Non-rising stem gate valve

Abstract

The utility model discloses a non-rising stem gate valve, which belongs to the technical field of gate valves and is characterized in that a rotatable gate plate is arranged in a valve body, one end of the gate plate is detachably connected with a valve rod, the other end of the valve rod is detachably connected with an electric support and a bevel gear, and the surface of the valve rod is fixedly sleeved with a cap connecting sleeve; according to the non-rising stem gate valve, the valve rod is arranged in the non-rising stem gate valve, the two ends of the non-rising stem gate valve are connected with the gate plate and the bevel gear correspondingly, the bevel gear can be driven to drive the gate plate to be opened and closed through meshing, and the non-rising stem gate valve is convenient to use. According to the non-rising stem gate valve, the valve rod connecting position is not exposed, the sealing performance of the valve rod connecting position is improved, the service life of the gate valve is prolonged, the gate valve is convenient to disassemble and assemble through the support, the valve cover and the filler pressing plate, the assembling convenience of the non-rising stem gate valve is improved, meanwhile, later overhaul is facilitated, and the maintenance cost of the gate valve is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of gate valve more specifically, relate to a dark rod gate valve. BACKGROUND

[0002] The opening and closing piece of dark rod gate valve is the gate plate, the movement direction of gate plate is perpendicular to fluid direction, can make adjustment and throttling, gate plate has two sealing surfaces, the most commonly used mode gate plate valve two sealing surfaces form wedge, wedge angle is different with valve parameter, however, the valve stem of common dark rod gate valve is exposed, further make the connection of valve stem exposed, cause the connection of valve stem to rust to accelerate wear and tear in the long-term use process, further cause the poor sealing of valve stem connection and cause the damage of gate valve, shorten the service life, and the integral connection of gate valve is not easy to disassemble and replace after the internal component is damaged, improve the maintenance cost of dark rod gate valve.

[0003] For example, the announcement number CN218207885U discloses a kind of magnetic suction encryption's dark rod gate valve, including dark rod gate valve, magnetic suction encryption device and magnetic suction key, the dark rod gate valve is used to cut off medium flow, the magnetic suction encryption device is located in the inside of the dark rod gate valve, the magnetic suction encryption device is used to limit the transmission between hand wheel and valve stem in the dark rod gate valve, the magnetic suction key is separately arranged, the magnetic suction key is used to remove the limitation of the magnetic suction encryption device, magnetic suction encryption device is arranged at the top of dark rod gate valve, the transmission between hand wheel and valve stem is blocked by magnetic suction encryption device, so that valve stem cannot be rotated by hand wheel, further ensure that dark rod gate valve cannot be opened and closed.

[0004] From the above-mentioned disclosure scheme, the connection of rotating rod and valve cover is exposed, which is easy to cause foreign dust and liquid to enter the connection gap of rotating rod and valve cover, thereby accelerating the rusting and wear of the surface of the connection of rotating rod, and thus causing poor sealing of the surface of the connection of rotating rod, thereby causing the sealing failure and damage of the gate valve, and the sealing and fixing between the valve body and the valve cover are not easy to disassemble, which not only makes the assembly more troublesome and reduces the work efficiency, but also affects the sealing performance after disassembly and combination during the later maintenance and replacement of components, making the replacement of internal components more troublesome and time-consuming, and increasing the maintenance cost of the gate valve. UTILITY MODEL CONTENTS

[0005] In view of the problems existing in the prior art, the utility model aims to provide a dark rod gate valve, which sets the valve stem inside, connects the valve stem with the gate plate and bevel gear at both ends, drives the bevel gear to open and close the gate plate through meshing, so that the connection of the valve stem is not exposed, improves the sealing performance of the connection of the valve stem, thereby prolonging the service life of the gate valve, and the bracket, valve cover and packing gland are provided to facilitate the disassembly and combination of the gate valve, which not only improves the assembly convenience of the dark rod gate valve, but also facilitates the later maintenance, thereby reducing the maintenance cost of the gate valve.

[0006] To solve the above problems, the utility model adopts the following technical scheme.

[0007] A dark rod gate valve, including the valve body, the inside of valve body is provided with rotatable flashboard, one end of flashboard is detachably connected with valve rod, the other end of valve rod is detachably connected with electric support and bevel gear, the surface of valve rod is fixedly sleeved with and cap connecting sleeve, the surface of and cap connecting sleeve is fixedly sleeved with symmetrical bearing and limit sleeve, the surface of electric support is connected with packing gland through bolt, the inner wall of packing gland is connected with packing sleeve, one end of packing sleeve is contacted extruded with packing, the surface of packing gland is connected with support through hinged bolt, the other end of support is connected with valve cover through bolt, the other end of valve cover is connected with one end of valve body through bolt fastening, this dark rod gate valve sets up valve rod in the inside, makes both ends respectively with flashboard and bevel gear connection, can drive flashboard opening and closing through meshing drive bevel gear, makes valve rod connection place not bare, improves the leakproofness of valve rod connection place, in turn prolongs the service life of gate valve, and through the setting support, valve cover and packing gland, the disassembly combination of gate valve is convenient, not only improves the assembly convenience of dark rod gate valve, but also is convenient for later maintenance, reduces the maintenance cost of gate valve.

[0008] Further, one end of the flashboard is clamped with a valve rod nut, a screw hole is arranged at the middle position of the valve rod nut, the inner wall of the screw hole is threadedly connected with one end of the valve rod, one end of the valve rod nut is provided with an arc-shaped part, and the arc-shaped part facilitates the clamping of the valve rod nut and the flashboard.

[0009] Further, a beaded composite gasket is clamped on the connecting surface of the valve cover and the valve body, a metal sheet is arranged in the beaded composite gasket, and a beading is arranged on both sides of the surface of the beaded composite gasket, so as to ensure the sealing stability of the beaded composite gasket.

[0010] Further, a key groove is arranged on the surface of the valve rod, a flat key is clamped on the inner wall of the bevel gear, and the surface of the flat key is in contact with the inner wall of the key groove, so as to ensure the rotation stability of the valve rod.

[0011] Further, a cap connecting sleeve is arranged in the electric support, a sliding hole is arranged at the center position of the cap connecting sleeve, and the inner wall of the sliding hole is in contact with the surface of the cap connecting sleeve.

[0012] Further, a winding gasket is clamped on the connecting surface of the support and the valve cover, and the winding gasket is made of flexible graphite composite material.

[0013] Further, an oil cup is arranged on the side surface of the electric support, so as to facilitate the addition of lubricating oil from the outside.

[0014] Compared with existing technologies, the advantages of this utility model are:

[0015] (1) This solution sets the valve stem inside, so that both ends are connected to the gate and the bevel gear respectively. The bevel gear can be driven to open and close the gate through meshing, so that the valve stem connection is not exposed, which improves the sealing performance of the valve stem connection and thus extends the service life of the gate valve.

[0016] (2) This solution facilitates the disassembly and assembly of the gate valve by setting up the bracket, valve cover and packing pressure plate, which not only improves the assembly convenience of the non-stem gate valve, but also facilitates the later maintenance and reduces the maintenance cost of the gate valve. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a front view of the valve stem structure of this utility model;

[0019] Figure 3 This is a front view of the valve stem nut structure of this utility model;

[0020] Figure 4 This is a top view of the edge-sealing composite gasket structure of this utility model;

[0021] Figure 5 for Figure 4 Cross-sectional view of the edge-sealed composite gasket.

[0022] Explanation of the labels in the diagram:

[0023] 1 Valve body, 2 Gate, 3 Valve stem nut, 4 Valve stem, 5 Edge-sealed composite gasket, 6 Connecting cap sleeve, 7 Limit sleeve, 8 Valve cover, 9 Keyway, 10 Screw hole, 11 Spiral wound gasket, 12 Bracket, 13 Packing, 14 Packing sleeve, 15 Packing plate, 16 Hinged bolt, 17 Arc-shaped part, 18 Metal sheet, 19 Edge sealing, 20 Bearing, 21 Oil cup, 22 Electric bracket cap, 23 Bevel gear, 24 Flat key. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example 1

[0026] Please see Figures 1-5The utility model provides a kind of dark rod gate valve, including valve body 1, the inside of valve body 1 is provided with rotatable gate 2, one end of gate 2 is detachably connected with valve stem 4, the other end of valve stem 4 is detachably connected with electric support and bevel gear 23, the surface of electric support is provided with hand wheel and electric drive device, hand wheel one end is equipped with bevel gear, and with bevel gear 23 meshing, electric support is rotatably connected with bevel gear 23, starts electric drive bevel gear 23 to rotate, its component structure and working principle belong to the well-known of the person skilled in the art, here will not carry out detailed description, the side of electric support is provided with oil cup 21, it is convenient to add lubricating oil from outside, the surface of valve stem 4 is fixedly sleeved with and cap connecting sleeve 6, the surface of and cap connecting sleeve 6 is fixedly sleeved with symmetrical bearing 20 and limit sleeve 7, the surface of electric support is connected with packing gland 15 by bolt, the inner wall of packing gland 15 is contact-connected with packing sleeve 14, one end of packing sleeve 14 is contact extruded with packing 13, the surface of packing gland 15 is connected with support 12 by hinged bolt 16, the connecting surface of support 12 and valve cover 8 is clamped with winding gasket 11, winding gasket 11 is made of flexible graphite composite material, the other end of support 12 is connected with valve cover 8 by bolt, the other end of valve cover 8 is connected and fastened with one end of valve body 1 by bolt.

[0027] One end of gate 2 is clamped with valve stem nut 3, screw hole 10 is arranged at the middle position of valve stem nut 3, the inner wall of screw hole 10 is threadedly connected with one end of valve stem 4, one end of valve stem nut 3 is equipped with arc portion 17, arc portion 17 facilitates the clamping of valve stem nut 3 and gate 2, the connecting surface of valve cover 8 and valve body 1 is clamped with edge-combined gasket 5, metal sheet 18 is arranged in the inside of edge-combined gasket 5, edge 19 is arranged on the surface of edge-combined gasket 5, to ensure the sealing stability of edge-combined gasket 5.

[0028] The surface of valve stem 4 is provided with keyway 9, flat key 24 is clamped in the inner wall of bevel gear 23, the surface of flat key 24 is contact-connected with the inner wall of keyway 9, to ensure the rotation stability of valve stem 4, the inside of electric support is provided with and cap connecting sleeve 6, sliding hole is arranged at the center position of and cap connecting sleeve 6, and the inner wall of sliding hole is contact-connected with the surface of and cap connecting sleeve 6.

[0029] The dark stem gate valve can be driven to rotate by the electric drive device of the electric support when the air gate plate 2 is opened and closed, or the hand wheel is manually rotated, so that the hand wheel drives the bevel gear to rotate, and then drives the bevel gear 23 to rotate, the bevel gear 23 drives the valve rod 4 to rotate, the valve rod 4 drives the gate plate 2 to rotate to open or close the gate valve, by setting the valve rod 4 in the inside, the two ends are connected with the gate plate 2 and the bevel gear 23 respectively, the gate plate 2 can be driven to open and close by engaging the bevel gear 23, so that the valve rod 4 connection is not exposed, the sealing property of the valve rod 4 connection is improved, and the service life of the gate valve is prolonged, and by setting the support 12, the valve cover 8 and the packing pressing plate 15, the gate valve is convenient to disassemble and combine, not only the assembly convenience of the dark stem gate valve is improved, but also the later maintenance is convenient, and the maintenance cost of the gate valve is reduced.

[0030] The above is only a preferred specific embodiment of the present application; however, the protection scope of the present application is not limited to this. Any skilled person in the art can make equivalent replacement or change according to the technical scheme and improvement concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A gate valve of the gate type, comprising a valve body (1), characterized in that: The inside of the valve body (1) is provided with a rotatable shutter (2), one end of the shutter (2) is detachably connected with a valve stem (4), the other end of the valve stem (4) is detachably connected with an electric bracket and a bevel gear (23), the surface of the valve stem (4) is fixedly sleeved with a nipple connecting sleeve (6), the surface of the nipple connecting sleeve (6) is fixedly sleeved with symmetrical bearings (20) and a limiting sleeve (7), the surface of the electric bracket is connected with a packing plate (15) through bolts, the inner wall of the packing plate (15) is connected with a packing sleeve (14), one end of the packing sleeve (14) is in contact with a packing (13), the surface of the packing plate (15) is connected with a bracket (12) through a hinged bolt (16), the other end of the bracket (12) is connected with a valve cover (8) through bolts, the other end of the valve cover (8) is connected and fastened with one end of the valve body (1) through bolts.

2. A gate valve according to claim 1, wherein: One end of the shutter (2) is clamped with a valve stem nut (3), the middle position of the valve stem nut (3) is provided with a threaded hole (10), the inner wall of the threaded hole (10) is threadedly connected with one end of the valve stem (4), one end of the valve stem nut (3) is provided with an arc-shaped part (17).

3. A gate valve according to claim 1, wherein: The connecting surface of the valve cover (8) and the valve body (1) is clamped with a bound composite gasket (5), the inside of the bound composite gasket (5) is provided with a metal sheet (18), the surface of the bound composite gasket (5) is provided with a bound part (19) on both sides.

4. A gate valve according to claim 1, wherein: The surface of the valve stem (4) is provided with a key groove (9), the inner wall of the bevel gear (23) is clamped with a flat key (24), the surface of the flat key (24) is in contact with the inner wall of the key groove (9).

5. A gate valve according to claim 1, wherein: The inside of the electric bracket is provided with a nipple connecting sleeve (6), the center position of the nipple connecting sleeve (6) is provided with a sliding hole, and the inner wall of the sliding hole is in contact with the surface of the nipple connecting sleeve (6).

6. A gate valve according to claim 1, wherein: The connecting surface of the bracket (12) and the valve cover (8) is clamped with a winding gasket (11), the winding gasket (11) is made of flexible graphite composite material.

7. A gate valve according to claim 1 wherein: The side surface of the electric bracket is provided with an oil cup (21).

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