Self-sealing flange-type gate valve

Abstract

The utility model relates to valve technical field especially is close -fitted flange type gate valve of a kind of self-tightening, including valve body, gate, valve stem, valve seat and drive mechanism, drive mechanism is driven gate reciprocating movement by valve stem, the inside of valve body is equipped with passageway, gate and valve seat are all arranged in valve body, and gate is separated passageway by and valve seat sealing cooperation, the position of the inside of valve body close to gate end part is equipped with recess, recess is equipped with buffer assembly, buffer assembly includes buffer block and first elastic piece, the end face of buffer block is equipped with the buffer groove compatible with gate end part, first elastic piece one end and buffer block abut another end with recess bottom wall abut, the inside of valve body is also equipped with the limiting block that buffer block is limited in recess, when gate and valve seat sealing cooperation the end part of the gate is slid into buffer groove and presses down buffer block, the utility model sets up buffer assembly in the valve body for gate buffering when closing, protect valve component, reduce noise, prolong the service life of gate valve.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to a self-tightening sealing flange gate valve. Background Technology

[0002] A gate valve is an opening and closing element consisting of a gate. The direction of the gate's movement is perpendicular to the direction of fluid flow. Gate valves can only be fully open or fully closed; they cannot be used for regulation or throttling. Gate valves achieve sealing through the contact between the valve seat and the gate. Typically, the sealing surface is overlaid with a metal material to increase wear resistance, such as 1Cr13, STL6, or stainless steel.

[0003] Existing gate valves typically use a straight up-and-down gate to close the valve. When the gate descends, the end of the gate impacts the inner wall of the valve body, which can easily lead to component damage and generate noise. Therefore, there is a need for a gate valve that can buffer the gate when it closes. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide a self-tightening sealing flange gate valve. This invention provides a buffer assembly in the valve body to buffer the gate when it is closed, thereby protecting the valve components, reducing noise, and extending the service life of the gate valve.

[0005] The technical solution adopted by this utility model is as follows: a self-tightening sealing flange gate valve, including a valve body, a gate, a valve stem, a valve seat, and a driving mechanism. The driving mechanism drives the gate to move back and forth through the valve stem. The valve body has an internal channel. The gate and the valve seat are both located inside the valve body, and the gate separates the channel by sealing with the valve seat. The valve body has a groove near the end of the gate. A buffer assembly is provided in the groove. The buffer assembly includes a buffer block and a first elastic element. The end face of the buffer block has a buffer groove adapted to the end of the gate. One end of the first elastic element abuts against the buffer block and the other end abuts against the bottom wall of the groove. The valve body also has a limiting block that restricts the buffer block in the groove. When the gate and the valve seat are sealed together, the end of the gate slides into the buffer groove and presses down on the buffer block.

[0006] The first elastic element is a pagoda-shaped spring. The end of the buffer block away from the buffer groove has a conical block protruding. A part of the pagoda-shaped spring is sleeved on the outside of the conical block, and the end of the pagoda-shaped spring that abuts against the buffer block abuts against the conical block at the same time.

[0007] A first sealing ring is provided between the buffer block and the inner wall of the groove.

[0008] The valve seat is mounted in the valve body via a mounting ring, which is embedded inside the valve body. A step is provided on the side of the valve body corresponding to the mounting ring. One end of the limiting block is located in the step, and the other end extends into the groove. The limiting block is connected to the mounting ring via fasteners.

[0009] The mounting ring is abutted against a second elastic element at one end away from the valve seat, and the other end of the second elastic element abuts against the inner wall of the valve body. The second elastic element presses the mounting ring and the valve seat toward the gate.

[0010] The bottom wall of the limiting block has several abutment blocks protruding from it. Some of the abutment blocks are used to abut against the step, and the other part of the abutment blocks are used to abut against the buffer block.

[0011] The valve seat is threadedly connected to the mounting ring.

[0012] A second sealing ring is provided between the mounting ring and the inner wall of the valve body.

[0013] A sealing gasket is provided between the mounting ring and the valve seat.

[0014] The beneficial effects of this utility model are as follows: This utility model provides a buffer assembly in the valve body to buffer the gate when it is closed. That is, while the gate is sealingly engaged with the valve seat, the gate presses down on the buffer block. The first elastic element at the bottom of the buffer block can offset the impact of the gate. The buffer groove on the buffer block allows the end of the gate to slide in, guiding the movement trajectory of the gate and preventing the gate from slipping when it contacts the buffer block. In addition, the limit block prevents the buffer block from sliding out of the groove, protecting the valve components, reducing noise, and extending the service life of the gate valve. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of this utility model.

[0016] Figure 1 This is a schematic diagram of the structure of the self-tightening sealing flange gate valve of this utility model; Figure 2 for Figure 1 A magnified view of a portion of point A in the middle; Figure 3 This is a partially enlarged schematic diagram of the gate when it is open. In the figure, 1-valve body, 2-gate, 3-valve stem, 4-valve seat, 5-drive mechanism, 6-channel, 7-groove, 8-buffer block, 9-first elastic element, 10-buffer groove, 11-limiting block, 12-conical block, 13-first sealing ring, 14-mounting ring, 15-step, 16-fastener, 17-second elastic element, 18-abutment block, 19-second sealing ring, 20-sealing gasket. Detailed Implementation

[0017] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0018] It should be noted that all uses of "first" and "second" in the embodiments of this utility model are for the purpose of distinguishing two entities or parameters with the same name but different names. It is clear that "first" and "second" are only for the convenience of expression and should not be construed as limiting the embodiments of this utility model. Subsequent embodiments will not explain this in detail.

[0019] The directional and positional terms used in this utility model, such as "up," "down," "front," "back," "left," "right," "inner," "outer," "top," "bottom," and "side," are merely for reference to the accompanying drawings. Therefore, the directional and positional terms used are for the purpose of explaining and understanding this utility model, and not for limiting the scope of protection of this utility model.

[0020] like Figures 1 to 3 As shown, this is an embodiment of the present invention, a self-tightening sealing flange gate valve, including a valve body 1, a gate 2, a valve stem 3, a valve seat 4, and a drive mechanism 5. The drive mechanism 5 drives the gate 2 to reciprocate through the valve stem 3. The valve body 1 has a channel 6 inside. The gate 2 and the valve seat 4 are both disposed inside the valve body 1, and the gate 2 separates the channel 6 by sealing with the valve seat 4. The valve body 1 has a groove 7 near the end of the gate 2. A buffer assembly is provided in the groove 7. The buffer assembly includes a buffer block 8 and a first elastic element 9. The end face of the buffer block 8 has a buffer groove 10 adapted to the end of the gate 2. One end of the first elastic element 9 abuts against the buffer block 8 and the other end abuts against the bottom wall of the groove 7. The valve body 1 also has a limiting block 11 that restricts the buffer block 8 in the groove 7. When the gate 2 and the valve seat 4 are sealed together, the end of the gate 2 slides into the buffer groove 10 and presses down the buffer block 8.

[0021] The beneficial effects of this design are as follows: This utility model provides a buffer component in the valve body to buffer the gate when it is closed. That is, while the gate is sealingly engaged with the valve seat, the gate presses down on the buffer block. The first elastic element at the bottom of the buffer block can offset the impact of the gate. The buffer groove on the buffer block allows the end of the gate to slide in, guiding the movement trajectory of the gate and preventing slippage when the gate contacts the buffer block. In addition, the limit block prevents the buffer block from sliding out of the groove, protecting the valve components, reducing noise, and extending the service life of the gate valve.

[0022] In a further configuration, the first elastic element 9 is a pagoda-shaped spring, and the end of the buffer block 8 away from the buffer groove 10 has a conical block 12 protruding from it. A portion of the pagoda-shaped spring is sleeved on the outside of the conical block 12, and the end of the pagoda-shaped spring that abuts against the buffer block 8 also abuts against the conical block 12.

[0023] The beneficial effects of this design are as follows: the first elastic element adopts a pagoda-shaped spring with existing technology, which has high load capacity, can adapt to different working conditions, and has a more compact structure. The pagoda-shaped spring cooperates with the conical block on the buffer block to prevent the pagoda-shaped spring from twisting. Furthermore, the end of the pagoda-shaped spring is embedded between the buffer block and the conical block to reduce gaps and achieve a faster response speed.

[0024] Furthermore, a first sealing ring 13 is provided between the buffer block 8 and the inner wall of the groove 7.

[0025] The beneficial effects of this design are as follows: the first sealing ring increases the sealing performance of the buffer block, preventing the medium from entering the groove and affecting the first elastic element.

[0026] In a further configuration, the valve seat 4 is disposed inside the valve body 1 via a mounting ring 14. The mounting ring 14 is embedded inside the valve body 1. A step 15 is also provided on the inner wall of the valve body 1 at the side position corresponding to the mounting ring 14. One end of the limiting block 11 is disposed inside the step 15 and the other end extends into the groove 7. The limiting block 11 is connected to the mounting ring 14 via a fastener 16.

[0027] The advantages of this design are as follows: the valve seat is detachably installed in the valve body via a mounting ring, which is also connected to the limit block via fasteners. The fasteners use existing bolts, which are easy to install and remove. Furthermore, if the buffer assembly needs to be removed, the limit block must be removed first, and the limit block is also detachably installed in the valve body.

[0028] In a further configuration, the end of the mounting ring 14 away from the valve seat 4 abuts against a second elastic member 17, and the other end of the second elastic member 17 abuts against the inner wall of the valve body 1. The second elastic member 17 presses the mounting ring 14 and the valve seat 4 toward the gate 2.

[0029] The beneficial effects of this design are as follows: the second elastic element uses a compression spring of existing technology, which allows the mounting ring, valve seat, and limit block to all be movable. The movable valve seat and gate are elastically sealed to achieve a self-tightening seal. The limit block and buffer block can also form a relative sliding fit. The limit block prevents the buffer block from sliding out of the groove, and the buffer block prevents the limit block from sliding out of the step. It can also prevent the mounting ring and valve seat from falling out of the correct position, forming a mutual movement and limiting effect.

[0030] Furthermore, the bottom wall of the limiting block 11 has a plurality of abutment blocks 18 protruding thereon. Some of the abutment blocks 18 are used to abut against the step 15, and other abutment blocks 18 are used to abut against the buffer block 8.

[0031] The beneficial effects of this design are as follows: by reducing the contact area of ​​the limiting block through the abutment block, the sliding becomes smoother, and the positional distribution of the two parts of the abutment block also prevents the limiting block from shifting.

[0032] Furthermore, the valve seat 4 is threadedly connected to the mounting ring 14.

[0033] The advantages of this design are as follows: threaded connections are easier to assemble and disassemble, and are more secure and reliable when tightened.

[0034] As a further feature, a second sealing ring 19 is provided between the mounting ring 14 and the inner wall of the valve body 1.

[0035] The beneficial effects of this design are as follows: the second sealing ring increases the sealing between the mounting ring and the valve body, preventing leakage.

[0036] Furthermore, a sealing gasket 20 is provided between the mounting ring 14 and the valve seat 4.

[0037] The beneficial effects of this design are as follows: the sealing gasket can ensure a good seal between the mounting ring and the valve seat, preventing leakage problems.

[0038] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A self-tightening flanged gate valve, comprising a valve body (1), a gate (2), a valve stem (3), a valve seat (4), and a drive mechanism (5), wherein the drive mechanism (5) drives the gate (2) to reciprocate via the valve stem (3), the valve body (1) has a channel (6) inside, the gate (2) and the valve seat (4) are both disposed within the valve body (1), and the gate (2) separates the channel (6) through a sealing fit with the valve seat (4), characterized in that: The valve body (1) has a groove (7) located near the end of the gate (2). The groove (7) contains a buffer assembly, which includes a buffer block (8) and a first elastic element (9). The end face of the buffer block (8) has a buffer groove (10) that is adapted to the end of the gate (2). One end of the first elastic element (9) abuts against the buffer block (8) and the other end abuts against the bottom wall of the groove (7). The valve body (1) also contains a limiting block (11) that restricts the buffer block (8) within the groove (7). When the gate (2) and the valve seat (4) are sealed together, the end of the gate (2) slides into the buffer groove (10) and presses down the buffer block (8).

2. The self-tightening flange gate valve according to claim 1, characterized in that: The first elastic element (9) adopts a pagoda-shaped spring. The end of the buffer block (8) away from the buffer groove (10) has a conical block (12) protruding. A part of the pagoda-shaped spring is sleeved on the outside of the conical block (12), and the end of the pagoda-shaped spring that abuts against the buffer block (8) abuts against the conical block (12) at the same time.

3. The self-tightening flange gate valve according to claim 1, characterized in that: A first sealing ring (13) is provided between the buffer block (8) and the inner wall of the groove (7).

4. The self-tightening flange gate valve according to claim 1, characterized in that: The valve seat (4) is set inside the valve body (1) by a mounting ring (14). The mounting ring (14) is embedded inside the valve body (1). The inner wall of the valve body (1) is also provided with a step (15) corresponding to the side position of the mounting ring (14). One end of the limiting block (11) is set in the step (15) and the other end extends into the groove (7). The limiting block (11) is connected to the mounting ring (14) by a fastener (16).

5. The self-tightening flange gate valve according to claim 4, characterized in that: The mounting ring (14) is abutted against a second elastic element (17) at one end away from the valve seat (4), and the other end of the second elastic element (17) abuts against the inner wall of the valve body (1). The second elastic element (17) presses the mounting ring (14) and the valve seat (4) toward the gate (2).

6. The self-tightening flange gate valve according to claim 5, characterized in that: The bottom wall of the limiting block (11) has a number of abutment blocks (18), some of which are used to abut against the step (15) and others are used to abut against the buffer block (8).

7. The self-tightening flange gate valve according to claim 4, characterized in that: The valve seat (4) is threadedly connected to the mounting ring (14).

8. The self-tightening flange gate valve according to claim 4, characterized in that: A second sealing ring (19) is provided between the mounting ring (14) and the inner wall of the valve body (1).

9. The self-tightening flange gate valve according to claim 4, characterized in that: A sealing gasket (20) is provided between the mounting ring (14) and the valve seat (4).

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