Cast steel bolt connection gate valve

Abstract

The utility model discloses a cast steel bolt connection gate valve which comprises a valve body, a valve cover is arranged on the top of the valve body, the valve cover is fixedly connected to the top of the valve body through a plurality of full-thread bolt assemblies, a support is fixedly installed on the top of the valve cover through bolts, a valve rod is arranged on the inner side of the support, and the valve rod is fixedly connected with the valve cover. The bottom end of the valve rod penetrates through the valve cover and extends into the valve body, and a gate plate is fixedly installed at the end, extending into the valve body, of the valve rod. The effect of fully sealing the valve rod and the valve cover can be achieved, and the situation that water emerges from the top of the valve cover due to insufficient sealing between the valve cover and the valve rod is effectively avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the gate valve field, concretely is a cast steel bolt joint gate valve. BACKGROUND

[0002] Cast steel bolt joint gate valve is widely used in petroleum, chemical industry, water supply and drainage and other pipeline systems because of high strength and high pressure resistance, is the key equipment of controlling medium on-off, and its sealing performance and structure impact resistance directly affect the pipeline operation safety, and the sealing failure of valve cover and valve stem is easy to cause medium leakage, and causes security risks and resource waste, and if the gate plate has weak water flow impact resistance, is easy to deform and wear in long-term use, and the service life of the valve is shortened.

[0003] But the existing cast steel bolt joint gate valve has obvious defects: the sealing structure of the valve cover and the valve stem is mostly designed as a single sealing ring, and the sealing performance is easy to decay under the influence of long-term medium corrosion and temperature change, especially under high pressure working conditions, the leakage problem is more prominent, and the gate plate mostly adopts a single flat plate structure, and the thickness and the strengthening design are insufficient, and when facing high-speed water flow impact, vibration and deformation are easy to occur, which not only affects the sealing fit, but also accelerates the component wear and tear, and increases the maintenance cost, so a cast steel bolt joint gate valve needs to be designed to solve the above problems. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a cast steel bolt joint gate valve to solve the problems in the above background technology.

[0005] To achieve the above object, the utility model provides the following technical scheme: a cast steel bolt joint gate valve, including the valve body, the top of the valve body is provided with the valve cover, the valve cover is fixedly connected on the top of the valve body through a plurality of full tooth bolts assemblies, the top of the valve cover is fixedly installed with the support through the bolt, the inner side of the support is provided with the valve stem, the bottom end of the valve stem penetrates the valve cover and extends to the inside of the valve body, and the end of the valve stem extending to the inside of the valve body is fixedly installed with the gate plate.

[0006] Preferably, the surface of the valve stem is slidably connected with flexible packing below, and the flexible packing is provided with a plurality of flexible packings, the bottom of the flexible packing extends to the inner side of the valve cover, and the surface of the valve stem is slidably connected with braided packing above the flexible packing, and the bottom of the braided packing extends to the inner side of the valve cover.

[0007] Preferably, the surface of the valve stem is slidably connected with packing pressure sleeve, the bottom of the packing pressure sleeve is attached to the top of the braided packing, the surface of the valve stem is slidably connected with packing pressure plate, the bottom of the packing pressure plate is attached to the top of the packing pressure sleeve, and the packing pressure plate is fixedly connected with the valve cover through the bolt.

[0008] Preferably, the front and rear parts of the gate plate are provided with sliding grooves, and the sliding grooves are slidably connected with supporting strips.

[0009] Preferably, one side of the support bar is fixedly connected to the inner side of the valve body.

[0010] Preferably, a winding gasket is arranged on the top of the valve body through opening of a groove.

[0011] Compared with the prior art, the utility model has the beneficial effects that:

[0012] 1. The cast steel bolt connecting gate valve, through the setting of multiple flexible packing and woven packing, and through the packing pressing sleeve and packing pressing plate to press the flexible packing and woven packing, can achieve the effect of fully sealing between the valve stem and the valve cover, effectively avoiding the situation that water emerges from the top of the valve cover due to insufficient sealing between the valve cover and the valve stem.

[0013] 2. The cast steel bolt connecting gate valve, through the setting of the sliding groove and the support bar, the gate plate can be supported by the sliding groove and the support bar, and after the water flow enters the inside of the valve body, the sliding groove and the support bar can provide support force to the two sides of the gate plate, preventing the deformation of the gate plate due to water flow impact. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a structural schematic view of the utility model;

[0015] Figure 2 It is a side view of the internal structure of the valve body and the valve cover of the utility model;

[0016] Figure 3 It is a structural schematic view of the support, the packing pressing sleeve and the packing pressing plate of the utility model;

[0017] Figure 4 It is a structural schematic view of the flexible packing, the woven packing and the packing pressing sleeve of the utility model;

[0018] Figure 5 It is a structural schematic view of the valve body, the support bar and the winding gasket of the utility model.

[0019] In the drawing: 1, valve body; 2, valve cover; 3, full tooth bolt assembly; 4, support; 5, valve stem; 6, flexible packing; 7, woven packing; 8, packing pressing sleeve; 9, packing pressing plate; 10, gate plate; 11, sliding groove; 12, support bar; 13, winding gasket. DETAILED DESCRIPTION

[0020] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of the present application.

[0021] Embodiment: Please refer to Figures 1-5 The utility model provides a cast steel bolt coupling gate valve, including valve body 1, the top of valve body 1 is placed with winding gasket 13 through setting open slot, the top of valve body 1 is provided with valve bonnet 2, valve bonnet 2 is fixedly connected on the top of valve body 1 through a plurality of full tooth bolt assembly 3, the top of valve bonnet 2 is fixedly installed with support 4 through bolt, the inboard of support 4 is provided with valve stem 5, the bottom end of valve stem 5 penetrates valve bonnet 2 and extends to the inside of valve body 1, and the end of valve stem 5 extending to the inside of valve body 1 is fixedly installed with gate 10.

[0022] Specifically, the lower surface of valve stem 5 is slidably connected with flexible packing 6, and the flexible packing 6 is provided with a plurality of flexible packings 6, the bottom of flexible packing 6 extends to the inboard of valve bonnet 2, the surface of valve stem 5 and above the flexible packing 6 is slidably connected with braided packing 7, the bottom of braided packing 7 extends to the inboard of valve bonnet 2, the surface of valve stem 5 is slidably connected with packing press sleeve 8, the bottom of packing press sleeve 8 is attached to the top of braided packing 7, the surface of valve stem 5 is slidably connected with packing press plate 9, the bottom of packing press plate 9 is attached to the top of packing press sleeve 8, and the packing press plate 9 is fixedly connected with the valve bonnet 2 through bolt, by setting a plurality of flexible packing 6 and braided packing 7, and by pressing the flexible packing 6 and braided packing 7 through the packing press sleeve 8 and the packing press plate 9, the valve stem 5 and the valve bonnet 2 can be fully sealed, and the water from the top of the valve bonnet 2 can be effectively prevented from flowing out.

[0023] Specifically, the front and rear of gate 10 are provided with sliding groove 11, the inside of sliding groove 11 is slidably connected with support strip 12, one side of support strip 12 is fixedly connected to the inboard of valve body 1, by setting sliding groove 11 and support strip 12, the gate 10 can be supported by sliding groove 11 and support strip 12, after the water flow enters the inside of valve body 1, the sliding groove 11 and the support strip 12 can provide support force to both sides of the gate 10, and the deformation of the gate 10 caused by water flow impact can be prevented.

[0024] Working principle: the utility model discloses a cast steel bolt coupling gate valve, through setting up multiple flexible packing 6 with weaving packing 7, and through packing pressure cover 8 and packing pressure plate 9 to the flexible packing 6, weaving packing 7 are pressed down, can reach the effect of sealing between valve stem 5 and bonnet 2 fully, effectively avoid the situation that water emerges from the top of bonnet 2 due to the insufficient sealing between bonnet 2 and valve stem 5, simultaneously through the setting up chute 11 and support strip 12 make the gate 10 can pass through chute 11 and support strip 12 and support, after the water flow enters the inside of valve body 1, chute 11 and support strip 12 can provide the support force to the both sides of gate 10, prevent the deformation of gate 10 due to the water flow impact.

[0025] The contents not described in detail in the specification belong to the prior art known to the person skilled in the art.

[0026] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement to part of the technical features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model shall be included in the protection scope of the utility model.

Claims

1. A cast steel bolted gate valve comprising a valve body (1), characterized in that: The top of the valve body (1) is provided with a valve cover (2), the valve cover (2) is fixedly connected to the top of the valve body (1) by a plurality of full tooth bolt assemblies (3), the top of the valve cover (2) is fixedly installed with a bracket (4) by bolts, the inner side of the bracket (4) is provided with a valve stem (5), the bottom end of the valve stem (5) penetrates the valve cover (2) and extends to the inside of the valve body (1), and the end of the valve stem (5) extending to the inside of the valve body (1) is fixedly installed with a gate plate (10).

2. A cast steel bolted gate valve according to claim 1, characterized in that: The surface of the valve stem (5) is slidably connected with flexible packing (6), and the flexible packing (6) is provided with a plurality of flexible packing (6), the bottom of the flexible packing (6) extends to the inside of the valve cover (2), the surface of the valve stem (5) and above the flexible packing (6) is slidably connected with braided packing (7), and the bottom of the braided packing (7) extends to the inside of the valve cover (2).

3. A cast steel bolted gate valve according to claim 2, characterized in that: The surface of the valve stem (5) is slidably connected with packing pressing sleeve (8), the bottom of the packing pressing sleeve (8) is fitted with the top of the braided packing (7), the surface of the valve stem (5) is slidably connected with packing pressing plate (9), the bottom of the packing pressing plate (9) is fitted with the top of the packing pressing sleeve (8), and the packing pressing plate (9) is fixedly connected with the valve cover (2) by bolts.

4. A cast steel bolted gate valve as defined in claim 1 wherein: The front and rear of the gate plate (10) are provided with a sliding groove (11), and the inner side of the sliding groove (11) is slidably connected with a supporting strip (12).

5. A cast steel bolted gate valve according to claim 4, characterized in that: One side of the supporting strip (12) is fixedly connected to the inner side of the valve body (1).

6. A cast steel bolted gate valve as defined in claim 1 wherein: The top of the valve body (1) is placed with a winding gasket (13) by opening a slot.

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