A multiple combination sealed buried butterfly valve for heating

Abstract

The present invention discloses a multiple-combination sealed buried butterfly valve for heating, which relates to the technical field of buried butterfly valves. The present invention includes a valve body, which is installed on a horizontal pipe at an angle of 45 degrees on a vertical plane, a valve body seal installed on the inner wall of the valve body, a valve stem rotatably installed inside the valve body, a valve plate assembly fixedly installed on the valve stem, and an outer valve ring fixedly installed on the outer side of the outer valve ring, and an inner valve plate rotatably installed inside the outer valve ring. The valve of the present invention is designed to be installed at an angle of 45 degrees. When the valve is closed, the valve plate assembly can push away impurities accumulated at the valve body sealing position, and some long strip impurities hanging on the valve body seal and granular impurities accumulated on the valve body seal can be scraped clean by the shear position formed by the valve body seal and the valve plate seal, thereby ensuring the sealing performance.

Description

Technical Field

[0001] The present invention relates to the technical field of buried butterfly valves, and in particular to a multiple-combination sealed buried butterfly valve for heating. Background Art

[0002] With the development of urban heating, the construction of long-distance pipelines in the field of urban heating has developed rapidly in recent years. Due to design reasons such as maintenance and pressurization, the valve installation spacing of long-distance pipelines is relatively long (usually 1-2 kilometers per group), and the transmission lines are long, crossing many cultivated lands without power supply. If the power supply of the long-distance pipelines is assumed to involve circuit maintenance and maintenance, the operating costs are increased. Therefore, most of the domestic long-distance heating pipelines still use manual valves.

[0003] Since long-distance pipelines are all buried (that is, farmland, roads, etc. are dug up before construction and backfilled and restored after the pipeline is laid), valve wells are necessary to facilitate valve installation and subsequent inspection and maintenance. To reduce the impact on the environment, valve wells usually have 2-4 inspection holes reserved. When the valve needs to be opened or closed, the inspection holes are opened to ventilate the area before personnel can operate the valve, or perform inspection, maintenance, and repairs on the valve. At the same time, because the heating medium (hot water) contains a lot of impurities, impurities easily accumulate on the lower part of the valve stem inside the valve. Impurities can easily enter between the valve plate and the valve body seal, causing seal wear and accelerating valve aging. This not only reduces the service life of the valve, but can also cause leakage problems, affecting the sealing and stability of the entire system. Summary of the Invention

[0004] The purpose of the present invention is to solve the above problems and provide a multiple combined sealed buried butterfly valve for heating.

[0005] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0006] A multiple-combination sealed buried butterfly valve for heating, comprising a valve body, the valve body being installed on a horizontal pipe at a 45° tilt on a vertical plane, a valve body seal being installed on the inner wall of the valve body, a valve stem being rotatably mounted inside the valve body, a valve plate assembly being fixedly mounted on the valve stem, the valve plate assembly comprising an outer valve ring fixedly mounted on the valve stem, a valve plate seal being mounted on the outer side of the outer valve ring, the inner wall of the outer valve ring being designed in an arc shape, an inner valve plate being rotatably mounted on the inner side of the outer valve ring, and the rotation axis of the inner valve plate being perpendicular to the axis of the valve stem;

[0007] A gear box is fixedly installed on the top of the valve body, an extended metal cylinder is fixedly installed on the outside of the gear box, a driving rod is rotatably installed inside the extended metal cylinder, and the driving rod can drive the valve stem to rotate through the gear box.

[0008] Furthermore, a self-lubricating bearing is provided between the valve body and the valve stem.

[0009] Furthermore, a low-leakage filler is provided between the valve body and the valve stem, and the low-leakage filler is located above the self-lubricating bearing.

[0010] Furthermore, two sets of sealing rings are provided between the valve body and the valve stem, and the two sets of sealing rings are located above the low-leakage filler.

[0011] Furthermore, a worm wheel and a worm are rotatably installed inside the gear box, the worm wheel is fixedly installed on the valve stem, the drive rod is connected to the worm wheel through a bevel gear, and the angle between the extended metal cylinder and the valve stem is °.

[0012] Furthermore, an outer indicator shell is fixedly mounted on the top of the extended metal cylinder, a driving sleeve and an indicator disk are rotatably mounted inside the outer indicator shell, the driving sleeve and the indicator disk are connected via a gear set, and the driving sleeve is fixedly mounted on the driving rod.

[0013] Furthermore, a rotating shaft is provided at both ends of the inner valve plate, and the rotating shaft is rotatably installed in the outer valve ring. An outer spiral groove is provided on the outer surface of the rotating shaft, and a guide groove is provided on the outer side of the outer valve ring. The rotating shaft passes through the guide groove. The internal sealing sliding connection of the guide groove is provided with a top sleeve, and a transmission protrusion is provided on the inner wall of the top sleeve. The transmission protrusion is inserted into the outer spiral groove, and a top spring is provided between the top sleeve and the rotating shaft.

[0014] Furthermore, the top sleeve has an arc design at one end away from the rotating shaft.

[0015] Furthermore, a mounting groove is provided on the outer side of the outer valve ring, the valve plate seal is sleeved in the mounting groove, and a mounting ring is fixedly installed on the outer side of the mounting groove, which clamps the valve plate seal in the mounting groove.

[0016] The beneficial effects of the present invention are as follows:

[0017] 1. The valve of the present invention is designed to be installed at a 45° angle, allowing the medium in the pipeline to accumulate at the shear function between the valve body seal and the valve plate seal. When the valve is closed, the valve plate assembly can push away impurities accumulated at the valve body seal position. Some long impurities hanging on the valve body seal and granular impurities accumulated on the valve body seal can be scraped off at the shear position formed by the valve body seal and the valve plate seal, thereby ensuring the sealing performance.

[0018] 2. The valve plate assembly of the present invention adopts a double-ring design. The outer valve ring is tilted 45° and the inner valve plate remains vertical, which can alleviate the turbulence problem in the fluid flow. Because the outer ring and the inner ring can respectively play the role of guiding the fluid, the combination of the tilt of the outer ring and the vertical state of the inner ring can achieve a relatively smooth flow path and reduce some irregular flow phenomena. Under the condition of large flow and high pressure, it can effectively reduce the disorder of the fluid direction and reduce the friction and wear of the internal components of the valve. After long-term operation, the sealing performance and mechanical life of the valve can be improved, thereby reducing the frequency of maintenance and replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the cross-sectional structure of the valve body of the present invention;

[0021] Figure 3 Schematic diagram of the valve plate assembly and valve stem structure of the present invention;

[0022] Figure 4 is a schematic diagram of the valve plate assembly of the present invention;

[0023] Figure 5 It is a schematic diagram of a partial cross-sectional structure of the valve plate assembly of the present invention;

[0024] Figure 6 This is a schematic diagram of the structure of the extended metal cylinder of the present invention;

[0025] Figure 7 This is a schematic diagram of the outer indicator shell structure of the present invention Figure 1 ;

[0026] Figure 8 This is a schematic diagram of the outer indicator shell structure of the present invention Figure 2 .

[0027] Figure numerals: 1. valve body; 11. self-lubricating bearing; 12. low-leakage packing; 13. sealing ring; 2. valve body seal; 3. valve plate assembly; 31. outer valve ring; 32. valve plate seal; 33. mounting ring; 34. inner valve plate; 35. rotating shaft; 36. outer spiral groove; 37. guide groove; 38. top sleeve; 39. transmission protrusion; 310. top spring; 4. valve stem; 5. gear box; 6. extended metal cylinder; 7. drive rod; 8. bevel gear; 9. outer indicator shell; 91. drive sleeve; 92. indicator disk. DETAILED DESCRIPTION

[0028] To make the objectives, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0029] Example 1, as Figures 1-8 As shown, a multiple combination sealed buried butterfly valve for heating includes a valve body 1, which is installed on a horizontal pipe at a 45° tilt on a vertical plane. A valve body seal 2 is installed on the inner wall of the valve body 1. A valve stem 4 is rotatably installed inside the valve body 1, and a valve plate assembly 3 is fixedly installed on the valve stem 4. The valve plate assembly 3 includes an outer valve ring 31 fixedly installed on the valve stem 4, a valve plate seal 32 is installed on the outer side of the outer valve ring 31, the inner wall of the outer valve ring 31 is designed to be circular, and an inner valve plate 34 is rotatably installed inside the outer valve ring 31, and the rotation axis of the inner valve plate 34 is perpendicular to the axis of the valve stem 4;

[0030] A gear box 5 is fixedly mounted on the top of the valve body 1 , an extended metal cylinder 6 is fixedly mounted on the outside of the gear box 5 , a drive rod 7 is rotatably mounted inside the extended metal cylinder 6 , and the drive rod 7 can drive the valve stem 4 to rotate through the gear box 5 .

[0031] Furthermore, an installation groove is opened on the outside of the outer valve ring 31, and the valve plate seal 32 is sleeved in the installation groove. A mounting ring 33 is fixedly installed on the outside of the installation groove, and the mounting ring 33 clamps the valve plate seal 32 in the installation groove. The valve body seal 2 also adopts the same installation method.

[0032] During installation, the valve body 1 is installed on the horizontal pipeline with an inclination of 45 degrees on the vertical plane, without the need to build a valve well. After the installation is completed, the valve and the pipeline are backfilled together, and the operating part of the valve, that is, the top of the driving rod 7 is exposed to the part below the ground, so that personnel can directly operate the valve on the road surface, which reduces the floor space occupied by the construction of the valve well and saves the construction funds of the valve well. The most important thing is to avoid the safety hazards of personnel caused by the operation of going down the well. When opening, the driving rod 7 is rotated, and the driving rod 7 drives the valve stem 4 to rotate through the gear box 5, and the valve stem 4 drives the outer valve ring 31 to rotate. The valve body 1 itself is designed to be tilted at 45°, so the outer valve ring 31 is tilted at 45° in the pipeline after rotation. At this time, impurities will not accumulate at the rotation position of the valve stem 4 in the valve body 1, and impurities accumulate at the shear function between the valve body seal 2 and the valve plate seal 32. When the valve is closed, the valve plate seal 32 can push away the impurities accumulated on the valve body seal 2. Some long strip impurities hanging on the valve body seal 2 and granular impurities accumulated on the valve body seal 2 can be scraped clean by the shear position formed by the valve body seal 2 and the valve plate seal 32, thereby ensuring the sealing performance.

[0033] Since the valve plate assembly 3 is tilted in the pipeline when it is opened, if the overall tilted state is maintained, when the flow velocity inside the pipeline is too high, the medium will have an irregular flow pattern during the flow process, especially for parameters such as fluid velocity and pressure, which may cause uneven distribution, affecting the flow efficiency of the fluid and the pressure distribution of the pipeline, and thus affecting the overall service life of the valve. Therefore, the present invention adopts a double-ring design. While ensuring shearing and scraping impurities, when the valve is opened, the inner valve plate 34 rotates 45° relative to the outer valve ring 31, and the inner valve plate 34 remains in a vertical state. The outer ring and the inner ring can respectively play the role of guiding the fluid. The combination of the tilt of the outer ring and the vertical state of the inner ring can achieve a relatively smooth flow path and reduce some irregular flow phenomena. Under high flow and high pressure conditions, it can effectively reduce the turbulence of the fluid direction and reduce the friction and wear on the internal components of the valve. After long-term operation, the sealing performance and mechanical life of the valve can be improved, thereby reducing the frequency of maintenance and replacement.

[0034] Embodiment 2, based on the above embodiment, further includes that a self-lubricating bearing 11 is provided between the valve body 1 and the valve stem 4, and no maintenance is required during the entire product life cycle, thus avoiding frequent maintenance operations during on-site operations and downhole operations.

[0035] Embodiment 3, based on the above embodiment, further includes: a low-leakage packing 12 is provided between the valve body 1 and the valve stem 4 , and the low-leakage packing 12 is located above the self-lubricating bearing 11 .

[0036] Furthermore, two sets of sealing rings 13 are provided between the valve body 1 and the valve stem 4 , and the two sets of sealing rings 13 are located above the low-leakage filler 12 .

[0037] At the sealing position between the valve stem 4 and the valve body 1, a multiple combination sealing packing design is adopted. First, a low-leakage packing 12 is used at the lower part, which can continuously compensate for the seal when the valve stem 4 rotates. Two sets of sealing rings 13 are also arranged behind this seal. Even if the previous seal fails, it can effectively block the leakage of the medium. In addition, there is a static sealing structure design between the extended metal cylinder 6 and the gear box 5, and there is no leakage or risk of leakage. The top of the gear box 5 is sealed as a whole with a cover plate. The valve stem 4 has no leakage structure and there is no risk of medium leakage.

[0038] Embodiment 4, based on the above embodiment, further includes that a worm wheel and a worm are rotatably installed inside the gear box 5, the worm wheel is fixedly installed on the valve stem 4, the drive rod 7 is connected to the worm gear through the bevel gear 8, and the angle between the extended metal tube 6 and the valve stem 4 is 45°.

[0039] By designing the bevel gear 8, the extended metal cylinder 6 and the drive rod 7 can be kept in a vertical state, thereby correcting the switch position and the road inclination caused by the valve being installed at a 45-degree tilt.

[0040] Embodiment 5, based on the above embodiment, further includes: an outer indicator shell 9 is fixedly installed on the top end of the extended metal cylinder 6, and a drive sleeve 91 and an indicator plate 92 are rotatably installed inside the outer indicator shell 9. The drive sleeve 91 and the indicator plate 92 are connected by a gear set, and the drive sleeve 91 is fixedly installed on the drive rod 7.

[0041] As the drive rod 7 rotates, the drive sleeve 91 is driven to rotate. The drive sleeve 91 drives the indicator plate 92 to rotate through the gear set. The indicator plate 92 is set on the upper part of the extended metal cylinder 6 to display the valve status. The device adopts a purely mechanical structure of the gear set, which has a stable structure and reliable operation. It does not require the intervention of external energy and can work stably for a long time. The transmission ratio of the gear transmission is made according to the transmission ratio of the lower gear box 5, so that the input and output data of the drive rod 7 are completely consistent, which can be consistent with the actual position of the valve.

[0042] Embodiment 6, on the basis of the above embodiment, further includes that both ends of the inner valve plate 34 are provided with a rotating shaft 35, the rotating shaft 35 is rotatably installed in the outer valve ring 31, the outer surface of the rotating shaft 35 is provided with an outer spiral groove 36, the outer side of the outer valve ring 31 is provided with a guide groove 37, the rotating shaft 35 passes through the guide groove 37, the internal sealing sliding connection of the guide groove 37 is provided with a top sleeve 38, the inner wall of the top sleeve 38 is provided with a transmission protrusion 39, the transmission protrusion 39 is inserted into the outer spiral groove 36, and a top spring 310 is provided between the top sleeve 38 and the rotating shaft 35.

[0043] Furthermore, the end of the top sleeve 38 away from the rotating shaft 35 is designed as an arc.

[0044] Rotate the drive rod 7, which drives the valve stem 4 to rotate through the gear box 5, and the valve stem 4 drives the outer valve ring 31 to rotate. Since the valve body 1 itself is designed to be tilted at 45 degrees, the outer valve ring 31 is tilted at 45 degrees in the pipeline after rotation. At the same time, the outer valve ring 31 drives the top sleeve 38 away from the inner wall of the valve body 1, and the top spring 310 pushes the top sleeve 38 out. Since the top sleeve 38 can only slide in the guide groove 37 and cannot rotate, the top sleeve 38 drives the rotating shaft 35 to rotate through the transmission protrusion 39 and the outer spiral groove 36, and the rotating shaft 35 drives the inner valve plate 34 to rotate. The outer valve ring 31 is rotated 45°, and the inner valve plate 34 is rotated to a vertical state without the need for additional drive. The structure is simple and compact. When the valve is closed, the top sleeves 38 at both ends are pressed against the inner wall of the valve body 1 under the action of the top spring 310, which can support and position the valve plate assembly 3 as a whole, further improving the stability of the valve closure. The top sleeve 38 is designed with an arc at one end away from the rotating shaft 35, which will not scratch the inner wall of the valve body 1. It should be noted that after the valve plate assembly 3 is tilted as a whole, the center of gravity of the inner valve plate 34 is biased downward, and the inner valve plate 34 can maintain a vertical state more stably.

[0045] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A multiple combined sealed buried butterfly valve for heating, comprising a valve body (1), characterized in that: The valve body (1) is installed on a horizontal pipeline, and the vertical axis of the valve body (1) forms an angle of 45° with the axis of the horizontal pipeline. A valve body seal (2) is installed on the inner wall of the valve body (1). A valve stem (4) is rotatably installed inside the valve body (1). A valve plate assembly (3) is fixedly installed on the valve stem (4). The valve plate assembly (3) includes an outer valve ring (31) fixedly installed on the valve stem (4). A valve plate seal (32) is installed on the outer side of the outer valve ring (31). The inner wall of the outer valve ring (31) is designed as an arc. An inner valve plate (34) is rotatably installed inside the outer valve ring (31). The rotation axis of the inner valve plate (34) is perpendicular to the axis of the valve stem (4). A gear box (5) is fixedly mounted on the top of the valve body (1), an extended metal cylinder (6) is fixedly mounted on the outside of the gear box (5), a driving rod (7) is rotatably mounted inside the extended metal cylinder (6), and the driving rod (7) can drive the valve stem (4) to rotate through the gear box (5); A rotating shaft (35) is provided at both ends of the inner valve plate (34), and the rotating shaft (35) is rotatably installed in the outer valve ring (31). An outer spiral groove (36) is provided on the outer surface of the rotating shaft (35), and a guide groove (37) is provided on the outer side of the outer valve ring (31). The rotating shaft (35) passes through the guide groove (37), and the inner sealing sliding connection of the guide groove (37) is provided with a top sleeve (38). The inner wall of the top sleeve (38) is provided with a transmission protrusion (39), and the transmission protrusion (39) is inserted into the outer spiral groove (36). A top spring (310) is provided between the top sleeve (38) and the rotating shaft (35).

2. A multiple combination sealing buried butterfly valve for heating according to claim 1, characterized in that: A self-lubricating bearing (11) is provided between the valve body (1) and the valve stem (4).

3. The multiple combined sealing buried butterfly valve for heating according to claim 2, characterized in that: A low-leakage filler (12) is provided between the valve body (1) and the valve stem (4), and the low-leakage filler (12) is located above the self-lubricating bearing (11).

4. A multiple combination sealing buried butterfly valve for heating according to claim 3, characterized in that: Two sets of sealing rings (13) are provided between the valve body (1) and the valve stem (4), and the two sets of sealing rings (13) are located above the low-leakage filler (12).

5. The multiple combined sealing buried butterfly valve for heating according to claim 1, characterized in that: A worm wheel and a worm are rotatably mounted inside the gear box (5), the worm wheel is fixedly mounted on the valve stem (4), the drive rod (7) is connected to the worm wheel through a bevel gear (8), and the angle between the extended metal cylinder (6) and the valve stem (4) is 45°.

6. The multiple combined sealing buried butterfly valve for heating according to claim 5, characterized in that: An outer indicator housing (9) is fixedly mounted on the top end of the extended metal cylinder (6), a driving sleeve (91) and an indicator plate (92) are rotatably mounted inside the outer indicator housing (9), the driving sleeve (91) and the indicator plate (92) are connected via a gear train, and the driving sleeve (91) is fixedly mounted on the driving rod (7).

7. The multiple combined sealing buried butterfly valve for heating according to claim 1, characterized in that: The top sleeve (38) is designed as an arc at one end away from the rotating shaft (35).

8. A multiple combined sealing buried butterfly valve for heating according to any one of claims 1 to 7, characterized in that: The outer side of the outer valve ring (31) is provided with a mounting groove, the valve plate seal (32) is sleeved in the mounting groove, and a mounting ring (33) is fixedly mounted on the outer side of the mounting groove, the mounting ring (33) clamps the valve plate seal (32) in the mounting groove.

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