Gate valve casting with dovetail groove matched with valve seat

Abstract

The utility model discloses a gate valve casting with a dovetail groove matched with a valve seat, and relates to the technical field of mechanical engineering. The gate valve casting with the dovetail groove matched with the valve seat comprises a valve body, a valve cover, a support, a hand wheel, a valve rod and a valve plate, a limiting device is arranged on the valve plate and comprises two connecting blocks and two dovetail blocks, the two dovetail blocks are fixedly connected to the two sides of the interior of the valve body, and the outer walls of the two connecting blocks are correspondingly connected with the interiors of grooves in the outer walls of the two sides of the valve plate in a sliding mode. Two T-shaped block grooves are formed in the inner walls of the grooves in the two sides of the valve plate, T-shaped blocks are fixedly connected to the outer walls of the two sides of the two connecting blocks, fixing bolts in limiting devices are screwed to be separated from the fixing bolt grooves, then the connecting blocks can be taken out of the valve plate, and parts such as the connecting blocks can be conveniently maintained or replaced; therefore, destructive means such as cutting and the like for replacement are avoided, the practicability of the equipment is effectively improved, the maintenance and repair cost is reduced, and the production continuity is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical engineering technical field, especially to dovetail groove cooperation valve seat's gate valve casting. BACKGROUND

[0002] In all kinds of fluid conveying systems of industrial production, the gate valve plays an indispensable role, its function is in the precise control of fluid on-off, guarantee the smooth running of production process, from the energy field petroleum, natural gas conveying pipeline, to the transmission of various corrosive, high temperature and high pressure medium in chemical industry, to the circulating water, steam system of electric power industry, the figure of gate valve can be seen everywhere.

[0003] Among numerous gate valve structure designs, the form of dovetail groove cooperation valve seat is favored because it can realize the stable installation and accurate sealing of valve seat, and in this structure, the fixed block on the valve seat cooperating with the dovetail groove is the key component to ensure the overall performance.

[0004] Most of the existing fixed blocks and valve seats adopt welding connection mode, once the welded fixed block appears problems such as wear and corrosion, it can only be replaced by destructive means such as cutting, which not only causes difficult-to-repair damage to the valve seat itself, increases maintenance cost, and even may lead to the entire valve seat being scrapped, requiring replacement of a brand new valve seat assembly, seriously affecting the continuity of production. TECHNICAL SOLUTION

[0005] The utility model aims at at least solving one of the technical problems existing in the prior art, providing a gate valve casting with dovetail groove cooperation valve seat, which can solve the problem that the fixed block and the valve seat adopt welding connection mode, once the welded fixed block appears problems such as wear and corrosion, it can only be replaced by destructive means such as cutting, which not only causes difficult-to-repair damage to the valve seat itself, increases maintenance cost, and even may lead to the entire valve seat being scrapped, requiring replacement of a brand new valve seat assembly, seriously affecting the continuity of production.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a gate valve casting with dovetail groove cooperation valve seat, comprising a valve body, a valve cover, a bracket, a hand wheel, a valve stem and a valve plate, a limiting device is arranged on the valve plate;

[0007] The limiting device comprises two connecting blocks and two dovetail blocks, the two dovetail blocks are fixedly connected to the two sides inside the valve body, the outer walls of the two connecting blocks are slidably connected to the inside of the grooves on the two sides of the valve plate, two T-shaped block grooves are formed in the inner walls of the grooves on the two sides of the valve plate;

[0008] Among numerous gate valve structure designs, the form of dovetail groove cooperation valve seat is favored because it can realize the stable installation and accurate sealing of valve seat, and in this structure, the fixed block on the valve seat cooperating with the dovetail groove is the key component to ensure the overall performance.

[0004] Most of the existing fixed blocks and valve seats adopt welding connection mode, once the welded fixed block appears problems such as wear and corrosion, it can only be replaced by destructive means such as cutting, which not only causes difficult-to-repair damage to the valve seat itself, increases maintenance cost, and even may lead to the entire valve seat being scrapped, requiring replacement of a brand new valve seat assembly, seriously affecting the continuity of production. TECHNICAL SOLUTION

[0005] The utility model aims at at least solving one of the technical problems existing in the prior art, providing a gate valve casting with dovetail groove cooperation valve seat, which can solve the problem that the fixed block and the valve seat adopt welding connection mode, once the welded fixed block appears problems such as wear and corrosion, it can only be replaced by destructive means such as cutting, which not only causes difficult-to-repair damage to the valve seat itself, increases maintenance cost, and even may lead to the entire valve seat being scrapped, requiring replacement of a brand new valve seat assembly, seriously affecting the continuity of production.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a gate valve casting with dovetail groove cooperation valve seat, comprising a valve body, a valve cover, a bracket, a hand wheel, a valve stem and a valve plate, a limiting device is arranged on the valve plate;

[0009] Preferably, the outer walls of the two T-shaped blocks are respectively slidably connected with the inner parts of the corresponding T-shaped block grooves, and the outer walls of the two dovetail blocks are respectively slidably connected with the inner parts of the corresponding dovetail grooves.

[0010] Preferably, the four fixing bolts are respectively threadedly connected with the inner parts of the corresponding fixing bolt grooves.

[0011] Preferably, the valve cover is mounted on the upper end of the valve body through bolts.

[0012] Preferably, the bracket is fixedly connected to the upper end of the valve cover, and the hand wheel is rotatably connected to the outer wall of the upper end of the bracket.

[0013] Preferably, the outer wall of the valve rod is slidably connected with the inner parts of the grooves formed in the outer walls of the upper and lower fixing blocks of the bracket.

[0014] Preferably, the upper end of the valve plate is provided with a limiting block groove, and the outer wall of the upper end of the valve rod is threadedly connected with the inner part of the groove formed in the outer wall of the hand wheel.

[0015] Preferably, the end of the valve rod close to the valve body slidably penetrates the valve cover and extends into the valve body.

[0016] Preferably, the end of the valve rod close to the valve body is fixedly connected with a limiting block.

[0017] Preferably, the two grooves in the outer wall of the limiting block are slidably connected with the outer walls of the two protrusions in the inner part of the limiting block groove.

[0018] Compared with the prior art, the utility model has the advantages that:

[0019] 1、The dovetail groove cooperates with the gate valve casting of the valve seat, the limiting device is twisted to make the limiting device and the fixing bolt groove separate, the connecting block can be taken out from the valve plate, the connecting block and other components can be conveniently maintained or replaced, destructive means such as cutting is avoided when replacement is needed, the practicability of equipment is effectively improved, the maintenance and repair cost is reduced, and the production continuity is improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] The utility model will be further explained in connection with the drawings and embodiments:

[0021] Figure 1 It is a three-dimensional structure schematic view of the utility model;

[0022] Figure 2 It is a structure schematic view of the inner part of the valve body of the utility model;

[0023] Figure 3 It is a structure schematic view of the utility model Figure 2 It is a structure schematic view of the enlarged view of A in the utility model;

[0024] Figure 4 It is the structure schematic view of the valve plate outside of the utility model.

[0025] Reference signs: 1, valve body;2, valve cover;3, support;4, hand wheel;5, valve rod;6, limit block;7, T-shaped block;8, connecting block;9, fixed bolt groove;10, limit block groove;11, valve plate;12, T-shaped block groove;13, fixed bolt;14, dovetail groove;15, dovetail block. DETAILED DESCRIPTION

[0026] This part will describe the specific embodiments of the utility model in detail, the preferred embodiments of the utility model are shown in the drawings, the role of the drawings is to supplement the description of the text part with graphics, so that people can intuitively and visually understand each technical feature and the overall technical scheme of the utility model, but it cannot be understood as the limitation of the protection scope of the utility model.

[0027] In the description of the utility model, it is understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right, etc., is based on the orientation or position relationship shown in the drawings, only for the convenience of describing the utility model and simplifying the description, and it is not indicated or implied that the indicated device or element must have a specific orientation, a specific orientation and operation, therefore it cannot be understood as the limitation of the utility model.

[0028] In the description of the utility model, greater than, less than, more than, etc. are understood as not including the number, above, below, etc. are understood as including the number. If the first, second is described, it is only used for distinguishing technical features for the purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0029] In the description of the utility model, unless otherwise explicitly limited, the words such as setting, installing and connecting should be broadly understood, and the person skilled in the art can reasonably determine the specific meaning of the above words in the utility model according to the specific content of the technical scheme.

[0030] Please refer to Figures 1-4 The utility model provides a technical scheme: the gate valve casting of dovetail groove cooperation valve seat, including valve body 1, valve cover 2, support 3, hand wheel 4, valve rod 5 and valve plate 11;

[0031] The limit device is arranged on the valve plate 11;

[0032] The limiting device comprises two connecting blocks 8 and two dovetail blocks 15, the two dovetail blocks 15 are fixedly connected to the two sides inside the valve body 1, the outer walls of the two connecting blocks 8 are slidably connected to the recesses on the two sides of the valve plate 11, two T-shaped block grooves 12 are formed in the inner walls of the recesses on the two sides of the valve plate 11, T-shaped blocks 7 are fixedly connected to the outer walls of the two connecting blocks 8, the outer walls of the two T-shaped blocks 7 are slidably connected to the corresponding T-shaped block grooves 12, dovetail grooves 14 are formed in the outer walls of the two connecting blocks 8, the valve plate 11 is slidably connected inside the valve body 1, the outer walls of the two dovetail blocks 15 are slidably connected to the corresponding dovetail grooves 14, fixed bolt grooves 9 are formed in the outer walls of the four T-shaped blocks 7, fixed bolts 13 are threadedly connected to the outer walls on the two sides of the upper end of the valve plate 11, and the ends of the four fixed bolts 13 close to the fixed bolt grooves 9 are threadedly extended into the T-shaped block grooves 12 and are threadedly connected to the corresponding fixed bolt grooves 9.

[0033] The valve cover 2 is installed on the upper end of the valve body 1 through bolts, the bracket 3 is fixedly connected to the upper end of the valve cover 2, the hand wheel 4 is rotatably connected to the outer wall on the upper end of the bracket 3, the outer wall of the valve rod 5 is slidably connected to the grooves formed in the outer walls of the upper and lower fixed blocks of the bracket 3, the limiting block groove 10 is formed in the upper end of the valve plate 11, the outer wall of the upper end of the valve rod 5 is threadedly connected to the groove formed in the outer wall of the hand wheel 4, the end of the valve rod 5 close to the valve body 1 slidably penetrates through the valve cover 2 and extends into the valve body 1, the limiting block 6 is fixedly connected to the end of the valve rod 5 close to the valve body 1, and the two recesses in the outer wall of the limiting block 6 are slidably connected to the two protrusions in the inner wall of the limiting block groove 10.

[0034] Further, in use of the device, the operator rotates the hand wheel 4, the hand wheel 4 is connected with the valve stem 5 through thread, so the rotating motion of the hand wheel 4 is converted into the up-down linear motion of the valve stem 5, when the valve stem 5 moves downward, because the groove on the outer wall of the limiting block 6 is connected with the protrusion in the limiting block slot 10 on the valve plate 11 through sliding, the valve stem 5 drives the valve plate 11 to move downward, in the process of the valve plate 11 moving downward, the dovetail groove 14 on the outer wall of the connecting block 8 is matched with the dovetail block 15 in the valve body 1 through sliding, at the same time, the T-shaped block 7 on the connecting block 8 slides in the T-shaped block slot 12 on the inner wall of the groove on both sides of the valve plate 11, which ensures the stability and accuracy of the movement of the valve plate 11, with the descent of the valve plate 11, the passage of the gate valve is gradually opened, the fluid can pass through the valve body 1, reverse rotation of the hand wheel 4, the valve stem 5 moves upward, drives the valve plate 11 to move upward, when the valve plate 11 moves upward, it also relies on the matching sliding of the connecting block 8 and the dovetail block 15, the T-shaped block 7 and the T-shaped block slot 12 to keep the stable motion track, when the valve plate 11 rises to the sealing surface of the valve body 1, the gate valve is closed, preventing the fluid from passing through, when installing the connecting block 8, the T-shaped block 7 on the connecting block 8 is aligned with the T-shaped block slot 12 on the valve plate 11 and inserted, the outer wall of the connecting block 8 is matched with the groove on the outer wall of both sides of the valve plate 11, then the fixing bolt 13 is screwed into the outer wall of both sides of the upper end of the valve plate 11, and one end of the fixing bolt 13 is screwed into the T-shaped block slot 12 and is screwed with the fixing bolt slot 9, so that the connecting block 8 is firmly fixed on the valve plate 11, when disassembling, reverse screwing of the fixing bolt 13 makes it separate from the fixing bolt slot 9, so that the connecting block 8 can be taken out of the valve plate 11, which is convenient for maintenance or replacement of the connecting block 8 and other components.

[0035] By rotating the fixing bolt 13 in the limiting device, it can be separated from the fixing bolt slot 9, so that the connecting block 8 can be taken out of the valve plate 11, which is convenient for maintenance or replacement of the connecting block 8 and other components, thereby avoiding the destructive means such as cutting when replacing, effectively improving the practicability of the equipment, reducing the cost of maintenance and repair, and improving the continuity of production.

[0036] Structure description: the valve body 1 is the main structure of the gate valve, used to accommodate internal components and provide fluid passage, the dovetail block 15 is fixedly connected on both sides of the valve body 1, which provides guidance and positioning for the sliding of the valve plate 11, and the outer part has a flange structure, which is used to connect with the pipeline to realize the installation and fixation of the gate valve in the fluid conveying system;

[0037] The valve cover 2 is installed on the upper end of the valve body 1 through bolts, which plays a role in closing the upper space of the valve body, protecting the internal components from the external environment, and providing installation support for the valve stem 5 and other components;

[0038] Support 3: fixedly connected to the upper end of the bonnet 2, mainly used to support and install the hand wheel 4, and provide guidance and support structure for the movement of the valve stem 5, to ensure the stability of the valve stem 5 during the up and down movement;

[0039] Hand wheel 4: rotatably connected to the outer wall of the upper end of the support 3, the operator rotates the hand wheel 4 to transmit the rotary motion to the valve stem 5, which is a manual control component for opening and closing the gate valve;

[0040] Valve stem 5: slidingly connected inside the groove on the outer wall of the upper and lower end blocks of the support 3, which plays a role in transmitting power, and its upper end is threadedly connected with the hand wheel 4, and its lower end is fixedly connected with the limiting block 6. When the hand wheel 4 rotates, the valve stem 5 moves up and down linearly under the guidance of the support 3, thereby driving the limiting block 6 and the valve plate 11 to move;

[0041] Limiting block 6: fixedly connected to one end of the valve stem 5 close to the valve body 1, and the two recesses on its outer wall are slidingly connected with the two protrusions inside the limiting block groove 10 on the upper end of the valve plate 11, so that the valve stem 5 and the valve plate 11 form a slidable connection, ensuring that the valve stem 5 can drive the valve plate 11 to move up and down, while limiting the rotation of the valve plate 11 relative to the valve stem 5;

[0042] T-shaped block 7: fixedly connected to the outer walls on both sides of the connecting block 8, and its outer wall is slidingly connected inside the T-shaped block groove 12 on the inner wall of the recess on both sides of the valve plate 11, which plays a role in positioning and guiding the connecting block 8 on the valve plate 11, allowing the connecting block 8 to slide stably on the valve plate 11;

[0043] Connecting block 8: slidingly connected inside the recess on both sides of the outer wall of the valve plate 11, and a dovetail groove 14 is formed on its outer wall to cooperate with the dovetail block 15 inside the valve body 1, realizing the sliding connection of the valve plate 11 in the valve body 1, and at the same time, the connecting block 8 is connected to the valve plate 11 through the T-shaped block 7, ensuring the stability of the movement of the valve plate 11;

[0044] Fixing bolt groove 9: formed on the upper end of the outer wall of the four T-shaped blocks 7, used to cooperate with the fixing bolt 13 to realize the fixed connection of the connecting block 8 and the valve plate 11, ensuring that the connecting block 8 will not separate from the valve plate 11 during work;

[0045] Limiting block groove 10: formed on the upper end of the valve plate 11, cooperating with the recess on the outer wall of the limiting block 6 to limit the rotation of the valve plate 11 relative to the valve stem 5, ensuring that the valve plate 11 can accurately move up and down linearly following the valve stem 5;

[0046] Valve plate 11: is the key component of the gate valve to realize the opening and closing function, is connected in the valve body 1 inside slidingly, the recess on both sides of valve plate 11 is used to install connecting block 8, and is matched with T-shaped block 7 through T-shaped block slot 12, realizes the sliding connection with connecting block 8, simultaneously, valve plate 11 is matched with dovetail block 15 through dovetail slot 14, and is stably slid in valve body 1, to realize the opening and closing operation of the gate valve;

[0047] T-shaped block slot 12: is set in the inner wall of the recess on both sides of valve plate 11, is matched with T-shaped block 7, provides orientation and positioning for the sliding of connecting block 8 on valve plate 11, guarantees the relative movement accuracy between connecting block 8 and valve plate 11;

[0048] Fixed bolt 13: the outer wall of both sides of the upper end of valve plate 11 is threadedly connected with fixed bolt 13, one end of which is threadedly extended to the inside of T-shaped block slot 12 and is threadedly connected with fixed bolt slot 9, is used to fix connecting block 8 on valve plate 11, prevents connecting block 8 from loosening or separating in the working process;

[0049] Dovetail slot 14: is set in the outer wall of connecting block 8, is matched with dovetail block 15 inside valve body 1, so that valve plate 11 can be stably slid in valve body 1, realizes the opening and closing action of the gate valve;

[0050] Dovetail block 15: is fixedly connected to both sides inside valve body 1, and the outer wall thereof is matched with dovetail slot 14 on connecting block 8, provides orientation and support for the sliding of valve plate 11 in valve body 1, guarantees the movement trajectory of valve plate 11 in valve body 1 to be accurate;

[0051] The embodiments of the utility model are explained in detail in combination with the drawings above, but the utility model is not limited to the above-mentioned embodiments, within the knowledge range possessed by the ordinary skill in the art in the described technical field, various changes can be made without departing from the purpose of the utility model.

Claims

1. A gate valve casting with a dovetail groove and valve seat, comprising a valve body (1), a valve cover (2), a bracket (3), a handwheel (4), a valve stem (5), and a valve plate (11), characterized in that: A limit device is provided on the valve plate (11); The limiting device includes two connecting blocks (8) and two dovetail blocks (15). The two dovetail blocks (15) are fixedly connected to the inside of the valve body (1) on both sides. The outer walls of the two connecting blocks (8) are slidably connected to the grooves on both sides of the valve plate (11). Two T-shaped block grooves (12) are opened on the inner walls of the grooves on both sides of the valve plate (11). Among them, T-shaped blocks (7) are fixedly connected to the outer walls on both sides of the two connecting blocks (8), and dovetail grooves (14) are opened on the outer walls of the two connecting blocks (8). The valve plate (11) is slidably connected inside the valve body (1). Fixed bolt grooves (9) are opened on the upper outer walls of the four T-shaped blocks (7), and fixed bolts (13) are threadedly connected to the upper outer walls on both sides of the valve plate (11).

2. The gate valve casting with dovetail groove fitting valve seat according to claim 1, characterized in that: The outer walls of the two T-blocks (7) are slidably connected to the interior of the corresponding T-block groove (12), and the outer walls of the two dovetail blocks (15) are slidably connected to the interior of the corresponding dovetail groove (14); Among them, the ends of the four fixing bolts (13) near the fixing bolt groove (9) are all threaded into the interior of the T-shaped block groove (12) and respectively connected to the internal threads of the corresponding fixing bolt groove (9).

3. The gate valve casting with dovetail groove fitting valve seat according to claim 1, characterized in that: The valve cover (2) is bolted to the upper end of the valve body (1); The bracket (3) is fixedly connected to the upper end of the valve cover (2), and the handwheel (4) is rotatably connected to the outer wall of the upper end of the bracket (3).

4. The gate valve casting with dovetail groove fitting valve seat according to claim 1, characterized in that: The outer wall of the valve stem (5) is slidably connected to the outer wall of the upper and lower fixing blocks of the bracket (3) by opening grooves; Among them, the upper end of the valve plate (11) is provided with a limit block groove (10), and the upper end of the valve stem (5) is connected to the outer wall of the handwheel (4) by an internal thread.

5. The gate valve casting with dovetail groove fitting valve seat according to claim 1, characterized in that: The valve stem (5) slides through the valve cover (2) and extends into the interior of the valve body (1) at one end near the valve body (1); Among them, a limit block (6) is fixedly connected to one end of the valve stem (5) near the valve body (1).

6. The gate valve casting with dovetail groove fitting valve seat according to claim 5, characterized in that: The two grooves on the outer wall of the limiting block (6) are slidably connected to the outer walls of the two protrusions inside the limiting block groove (10).

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