Flange gate valve with high safety performance

Abstract

The utility model discloses a flange gate valve with high safety performance, which relates to the technical field of flange gate valves and comprises a valve body, a valve rod and a valve plate, the valve plate is arranged at the lower end of the valve rod, flange plates are arranged on two sides of the valve body, a suction mechanism is arranged between adjacent flange plates, and the suction mechanism comprises a first guide sleeve and a second guide sleeve. The first guide sleeve and the second guide sleeve are both fixedly connected to the outer side of the valve body in a sleeving mode, the outer side of the first guide sleeve is connected with a limiting sleeve through threads, the limiting sleeve is slidably connected to the outer side of the second guide sleeve in a sleeving mode, an air bag ring is arranged between the first guide sleeve and the second guide sleeve, and the side, corresponding to the valve body, of the air bag ring is provided with an air connecting end which is annularly arranged on the air bag ring. A push plate is arranged on the inner side of the first guide sleeve and makes contact with the air bag ring. According to the scheme, the suction mechanism can suck gas in the valve body by means of acting force in the gate valve dismounting process, harm of high-pressure gas to an operator when the gate valve is dismounted is reduced, and the use safety of the gate valve is further improved.

Description

Technical Field

[0001] This utility model relates to the field of flange gate valve technology, specifically a flange gate valve with high safety performance. Background Technology

[0002] A gate valve is an opening and closing element consisting of a gate. The direction of movement of the gate is perpendicular to the direction of fluid flow. Gate valves can only be fully open or fully closed, and cannot be used for regulation or throttling. Gate valves achieve sealing through the contact between the valve seat and the gate. Usually, metal materials are welded onto the sealing surface to increase wear resistance. There are rigid gates and resilient gates. Based on the different gates, gate valves are classified as rigid gate valves and resilient gate valves.

[0003] Existing flanged gate valves are commonly used in pipelines transporting various gases. When overhauling these valves, it's necessary to first close both the upstream and downstream valves and then remove the flange bolts. However, high-pressure gas may still be present inside the valve at this point. If this high-pressure gas is ejected from the flange, it can easily cause injury to workers, making it unsafe. To address this, we propose a flanged gate valve with high safety performance. Utility Model Content

[0004] The purpose of this utility model is to provide a flange gate valve with high safety performance to solve the problem mentioned in the background art that when the flange gate valve is disassembled, there may still be high-pressure gas inside the gate valve, and the high-pressure gas ejected from the flange may cause injury to the workers.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a flanged gate valve with high safety performance, comprising a valve body, a valve stem and a valve plate, wherein the valve plate is disposed at the lower end of the valve stem and is disposed inside the valve body, and flanges are disposed on both sides of the valve body, and a suction mechanism is disposed between adjacent flanges, wherein the suction mechanism is sleeved on the outside of the valve body;

[0006] The suction mechanism includes a guide sleeve one and a guide sleeve two, both of which are fixedly sleeved on the outside of the valve body, and their centers are collinear. A limit sleeve is threadedly connected to the outside of the guide sleeve one, and the limit sleeve is slidably sleeved on the outside of the guide sleeve two. An air bladder ring is provided between the guide sleeve one and the guide sleeve two. An air inlet is provided on one side of the air bladder ring corresponding to the valve body, and the air inlet communicates with the inside of the air bladder ring. The air inlet is annularly positioned on the air bladder ring. A corresponding opening on the valve body is provided for receiving air. The guide sleeve has an insertion slot and a push plate inside. The push plate contacts the airbag ring and is collinear with the center of the airbag ring. A guide rod is provided on the side of the push plate facing away from the airbag ring, and a return spring is sleeved on the guide rod. The guide rod passes through the guide sleeve and is annularly arranged on the push plate. A fastening bolt is annularly arranged on the flange, and the fastening bolt and the guide rod are positioned correspondingly on the left and right sides. The fastening bolt and the flange are connected by threads.

[0007] Preferably, the distance between the flange and the corresponding guide sleeve is between 25mm and 50mm.

[0008] Preferably, the distance between the first guide sleeve and the second guide sleeve is less than 1 mm of the outer diameter of the airbag ring.

[0009] Preferably, the outer diameter of the guide sleeve II is greater than the maximum outer diameter of the airbag ring.

[0010] Preferably, the guide rod and the fastening bolt are both parallel to the center line of the valve body, and the guide rod and the fastening bolt are both arranged in a ring on the outside of the valve body.

[0011] Preferably, the fastening bolt and the guide rod are in movable contact, and the length of the fastening bolt is greater than the length of the guide rod.

[0012] Preferably, the second guide sleeve is disposed on the inner side of the adjacent first guide sleeve, and the first guide sleeve is open on the side corresponding to the second guide sleeve.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This high-safety flange gate valve utilizes a suction mechanism on both sides of the valve body. The fastening bolts connecting the valve body and the pipeline restrict the movement of the corresponding guide rod, causing the push plate to slide within the guide sleeve. The movement of the push plate exerts a compressive force on the air bladder ring, discharging the gas inside the air bladder ring through the gas inlet to the inside of the valve body. When disassembling the gate valve, the fastening bolts are unscrewed from the valve body. At this point, the fastening bolts gradually disengage from the guide rod, meaning the guide rod loses its compressive force on the air bladder ring. The air bladder ring then resets, drawing in the gas inside the valve body. This reduces the harm of high-pressure gas to the operator during disassembly, further improving the safety of the gate valve and making it worthy of promotion.

[0015] 2. This type of high-safety flange gate valve has a limiting sleeve connected to the outer side of the guide sleeve by a threaded connection. The limiting sleeve can restrict the outward movement of the air bladder ring, which can facilitate the replacement of the air bladder ring and ensure the effectiveness of the air bladder ring. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a front view schematic diagram of the present invention;

[0018] Figure 3 This is a schematic diagram of a half-section of the present invention;

[0019] Figure 4 for Figure 3 Enlarged schematic diagram at point M.

[0020] In the diagram: 1. Valve body; 2. Valve stem; 3. Valve plate; 4. Flange; 5. Suction mechanism; 51. Guide sleeve one; 52. Guide sleeve two; 53. Limiting sleeve; 54. Airbag ring; 55. Air inlet end; 56. Push plate; 57. Guide rod; 58. Fastening bolt; 59. Return spring; 6. Hole and groove. Detailed Implementation

[0021] 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.

[0022] Example: Please refer to Figure 1-4This utility model provides a technical solution: a high-safety-performance flanged gate valve, comprising a valve body 1, a valve stem 2, and a valve plate 3. The valve plate 3 is located at the lower end of the valve stem 2 and is situated inside the valve body 1. Flanges 4 are provided on both sides of the valve body 1, wherein the flanges 4 are used for connection to pipelines. A suction mechanism 5 is provided between adjacent flanges 4, and the suction mechanism 5 is sleeved on the outside of the valve body 1.

[0023] Please see Figure 3 and Figure 4 The suction mechanism 5 includes a first guide sleeve 51 and a second guide sleeve 52. Both guide sleeves 51 and 52 are fixedly sleeved on the outside of the valve body 1, and their centers are collinear. The second guide sleeve 52 is located inside the adjacent first guide sleeve 51, and the side of the first guide sleeve 51 corresponding to the second guide sleeve 52 is open. It is worth noting that the outer diameters of the first guide sleeve 51 and the second guide sleeve 52 are equal. The first guide sleeve 51 and the second guide sleeve 52 can be machined together during the machining of the valve body 1.

[0024] The distance between the flange 4 and the corresponding guide sleeve 51 is between 25mm and 50mm. Setting the guide sleeve 51 at a certain distance from the flange 4 on the corresponding side facilitates the connection of the valve body 1 and the pipeline connection bolts (i.e., the fastening bolts 58 mentioned below).

[0025] Furthermore, a limiting sleeve 53 is threadedly connected to the outside of guide sleeve 1 51. The limiting sleeve 53 is slidably fitted onto the outside of guide sleeve 2 52. An airbag ring 54 is provided between guide sleeve 1 51 and guide sleeve 2 52. It should be noted that the size and storage capacity of the airbag ring 54 are adjusted according to actual conditions and are only shown as an illustration in this scheme. The outer diameter of guide sleeve 2 52 is larger than the maximum outer diameter of airbag ring 54. The distance between guide sleeve 1 51 and guide sleeve 2 52 is less than 1mm of the outer diameter of airbag ring 54. An air inlet end 55 is provided on one side of airbag ring 54 corresponding to valve body 1. The air inlet end 55 communicates with the inside of airbag ring 54 and is arranged in a ring on airbag ring 54. The air inlet end 55 facilitates the discharge and intake of gas inside airbag ring 54. Airbag ring 54 is made of elastic silicone inflatable sealing ring, which has a certain degree of elasticity and sealing performance.

[0026] Please see Figure 3A slot 6 is provided at a corresponding position on the valve body 1 for inserting the air inlet end 55. The slot 6 facilitates the insertion of the air inlet end 55. A push plate 56 is provided inside the guide sleeve 51. The push plate 56 contacts the airbag ring 54, and the push plate 56 and the airbag ring 54 are collinear. A guide rod 57 is provided on the side of the push plate 56 facing away from the airbag ring 54. A return spring 59 is sleeved on the guide rod 57. The return spring 59 is located on the side of the push plate 56 facing away from the airbag ring 54. The guide rod 57 passes through the guide sleeve 51 and is arranged in a ring on the push plate 56. The guide rod 57 can guide and drive the movement of the push plate 56 and restrict the rotation of the push plate 56 during the movement. After providing a driving force from the outside to the inside to the guide rod 57, it can make The push plate 56 moves inside the guide sleeve 51, thereby providing a squeezing force to the airbag ring 54, causing the airbag ring 54 to compress and expel the air inside, maintaining the state of being drawn in gas. When disassembling the gate valve, the fastening bolt 58 is unscrewed from the valve body 1. At this time, the fastening bolt 58 gradually disengages from the guide rod 57, meaning that the guide rod 57 loses the squeezing force on the airbag ring 54. At this time, the airbag ring 54 resets, which can adsorb the gas inside the valve body 1, reducing the harm of high-pressure gas to the operator when disassembling the gate valve, and further ensuring the operator's safety.

[0027] In this embodiment, a ring of fastening bolts 58 is provided on the flange 4, and the fastening bolts 58 and the guide rod 57 are positioned correspondingly to each other. The fastening bolts 58 and the flange 4 are connected by threads. Both the guide rod 57 and the fastening bolts 58 are parallel to the center line of the valve body 1, and both are arranged in a ring on the outside of the valve body 1. The fastening bolts 58 and the guide rod 57 are in movable contact, and the length of the fastening bolts 58 is greater than the length of the guide rod 57. In this solution, the valve body 1 and the pipeline are connected by the fastening bolts 58. During this process, the continuous screwing of the fastening bolts 58 can provide a pushing force to the guide rod 57, causing the airbag ring 54 to compress. After the driving force is removed, the airbag ring 54 can be drawn into the high-pressure gas inside the valve body 1 by the elastic restoring action of the return spring 59 and the airbag ring 54.

[0028] Working principle: When installing this type of high-safety flange gate valve, the fastening bolts 58 connecting the valve body 1 and the pipeline restrict the movement of the corresponding guide rod 57, which in turn drives the push plate 56 to slide within the guide sleeve 51. The movement of the push plate 56 can generate a squeezing force on the air bladder ring 54, thereby discharging the gas inside the air bladder ring 54 to the inside of the valve body 1 through the air inlet 55. When disassembling the gate valve, the fastening bolts 58 are unscrewed from the valve body 1. At this time, the fastening bolts 58 gradually disengage from the guide rod 57, that is, the guide rod 57 loses the squeezing force on the air bladder ring 54. At this time, the air bladder ring 54 resets and can draw in the gas inside the valve body 1.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A flange gate valve with high safety performance, comprising a valve body (1), a valve rod (2) and a valve plate (3), the valve plate (3) is arranged at the lower end of the valve rod (2), and the valve plate (3) is arranged inside the valve body (1), characterized in that The valve body (1) is provided with flange plates (4) on both sides, suction mechanisms (5) are arranged between adjacent flange plates (4), and the suction mechanisms (5) are sleeved on the outer side of the valve body (1); The suction mechanism (5) comprises guide sleeves one (51) and guide sleeves two (52), the guide sleeves one (51) and the guide sleeves two (52) are fixedly sleeved on the outer side of the valve body (1), the centers of the guide sleeves one (51) and the guide sleeves two (52) are collinear, a limiting sleeve (53) is connected to the outer side of the guide sleeves one (51) through threads, the limiting sleeve (53) is slidingly sleeved on the outer side of the guide sleeves two (52), an air bag ring (54) is arranged between the guide sleeves one (51) and the guide sleeves two (52), the air bag ring (54) is provided with a gas connection end (55) corresponding to one side of the valve body (1), the gas connection end (55) is in communication with the inside of the air bag ring (54), the gas connection end (55) is annularly arranged on the air bag ring (54), a hole slot (6) for inserting the gas connection end (55) is formed in the valve body (1) at a corresponding position, a push plate (56) is arranged on the inner side of the guide sleeves one (51), the push plate (56) is in contact with the air bag ring (54), the centers of the push plate (56) and the air bag ring (54) are collinear, a guide rod (57) is arranged on the side of the push plate (56) away from the air bag ring (54), a reset spring (59) is sleeved on the guide rod (57), the reset spring (59) is arranged on the side of the push plate (56) away from the air bag ring (54), the guide rod (57) penetrates through the guide sleeves one (51), and the guide rod (57) is annularly arranged on the push plate (56), fastening bolts (58) are annularly arranged on the flange plates (4), the left and right positions of the fastening bolts (58) and the guide rod (57) correspond to each other, and the fastening bolts (58) are connected with the flange plates (4) through threads.

2. The flange gate valve with high safety performance according to claim 1, characterized in that: The distance between the flange plate (4) and the guide sleeve one (51) on the corresponding side is between 25mm and 50mm.

3. The flange gate valve with high safety performance according to claim 1, characterized in that: The distance between the guide sleeve one (51) and the guide sleeve two (52) is less than 1mm of the outer diameter of the air bag ring (54).

4. The flange gate valve with high safety performance according to claim 1, characterized in that: The outer diameter of the guide sleeve two (52) is greater than the maximum outer diameter of the air bag ring (54).

5. The flange gate valve with high safety performance according to claim 1, characterized in that: The guide rod (57) and the fastening bolt (58) are parallel to the center line of the valve body (1), and the guide rod (57) and the fastening bolt (58) are arranged on the outer side of the valve body (1) in an annular shape.

6. The flange gate valve with high safety performance according to claim 1, characterized in that: The fastening bolt (58) and the guide rod (57) are in movable contact, and the length of the fastening bolt (58) is greater than the length of the guide rod (57).

7. The flange gate valve with high safety performance according to claim 1, characterized in that: The guide sleeve two (52) is arranged on the inner side of the adjacent guide sleeve one (51), and the guide sleeve one (51) is open on the side corresponding to the guide sleeve two (52).

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