High-sealing corrugated pipe ball valve structure

Abstract

The utility model discloses a high-sealing corrugated pipe ball valve structure, which comprises a valve body, a valve seat, a ball body, an upper valve rod, a guide pin, a driving sleeve, a corrugated pipe and a lifting mechanism, the guide pin is horizontally and fixedly connected to the top of the upper valve rod, inclined lifting grooves are symmetrically arranged on two sides of the driving sleeve, the driving sleeve is sleeved at the top end of the upper valve rod, and the corrugated pipe is arranged in the lifting grooves. The two ends of the guide pin are correspondingly connected into the lifting grooves of the driving sleeve in a sliding mode respectively, the corrugated pipe is connected outside the driving sleeve in a sleeving mode, the lower end of the corrugated pipe is fixedly connected to the top of the valve body, the upper end of the corrugated pipe is fixedly connected to the top of the driving sleeve through a connecting piece, the lifting mechanism is fixedly connected to the top of the valve body, and the lifting end of the lifting mechanism is fixedly connected to the top of the driving sleeve. The corrugated pipe is introduced to serve as a sealing piece, the sealing performance of the ball valve is improved, poisonous and harmful fluid can be guided, and the ball valve has the advantages of being simple in structure, safe, effective, good in using effect and the like.

Description

Technical Field

[0001] This utility model relates to the field of pipeline valve structure design technology, specifically a high-sealing bellows ball valve structure. Background Technology

[0002] The opening and closing element of a ball valve is a ball, which is driven by the valve stem and rotates around the valve's axis. Traditional ball valves use seals and packing materials as sealing methods, but when conveying some toxic or harmful fluids, the sealing performance of existing ball valves cannot meet the requirements. Summary of the Invention

[0003] The purpose of this invention is to provide a high-sealing bellows ball valve structure to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a high-sealing bellows ball valve structure, comprising: a valve body, a valve seat, a ball, an upper valve stem, a guide pin, a drive sleeve, a bellows, and a lifting mechanism. The valve body is a general-purpose valve body for ball valves. The valve seat is located inside the valve body, and the ball is located inside the valve body and matches the valve seat. The upper valve stem is fixed to the top of the ball, and the top of the upper valve stem extends out of the top of the valve body. The guide pin is horizontally fixed to the top of the upper valve stem. The drive sleeve has symmetrical inclined lifting grooves on both sides. The drive sleeve is fitted onto the top of the upper valve stem, and the two ends of the guide pin are respectively slidably connected in the lifting grooves of the drive sleeve. The bellows is fitted onto the outside of the drive sleeve. The lower end of the bellows is fixed to the top of the valve body, and the upper end of the bellows is fixed to the top of the drive sleeve through a connecting piece. The lifting mechanism is fixed to the top of the valve body, and the lifting end of the lifting mechanism is fixed to the top of the drive sleeve.

[0005] Furthermore, the lifting mechanism includes a housing, a lifting rod, a threaded pipe, a connecting seat, and a handwheel. The housing is fixedly connected to the top of the valve body, and the top of the upper valve rod is located inside the housing. The lifting rod is slidably connected to the inside of the housing through a guide groove. The connecting seat is set above the top of the housing through a bracket. The threaded pipe is movably connected to the connecting seat through a bearing, and the threaded pipe is threadedly connected to the top of the lifting rod. The handwheel is fixedly connected to the upper part of the threaded pipe.

[0006] Furthermore, a packing seal is provided at the connection between the housing and the lifting rod.

[0007] Compared with the prior art, the beneficial effects of this utility model are as follows: The high-sealing bellows ball valve structure of this utility model improves upon the existing ball valve by introducing a bellows as a sealing element, thereby improving the sealing performance of the ball valve and meeting the requirements for conveying toxic and harmful fluids; the bellows-sealed ball valve has high safety and reliability, as the bellows element itself has deformability and anti-aging properties, which can overcome the weaknesses of packing-sealed valves such as packing aging and temperature difference sensitivity. In addition, the use of a bellows-packing double sealing structure further improves the safety and reliability of the valve.

[0008] This utility model has the advantages of simple structure, safety and effectiveness, and good performance. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of this utility model;

[0010] Figure 2 This is a schematic diagram of the drive sleeve part of this utility model;

[0011] Figure 3 This is a schematic cross-sectional view of the drive sleeve portion of this utility model;

[0012] In the diagram: 1-Valve body; 2-Valve seat; 3-Ball; 4-Upper valve stem; 5-Guide pin; 6-Drive sleeve; 7-Bellows; 8-Lifting mechanism; 9-Packing seal; 10-Lifting groove;

[0013] 11-Housing; 12-Lifting rod; 13-Threaded pipe; 14-Connecting seat; 15-Handwheel. Detailed Implementation

[0014] 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.

[0015] Please see Figure 1 , 23. This utility model provides a high-sealing bellows ball valve structure, including: a valve body 1, a valve seat 2, a ball 3, an upper valve stem 4, a guide pin 5, a drive sleeve 6, a bellows 7, and a lifting mechanism 8. The valve body 1 is a general-purpose valve body for ball valves. The valve seat 2 is disposed inside the valve body 1. The ball 3 is disposed inside the valve body 1 and matches the valve seat 2. The upper valve stem 4 is fixed to the top of the ball 3, and the top of the upper valve stem 4 extends out of the top of the valve body 1. The guide pin 5 is horizontal. The drive sleeve 6 is fixed to the top of the upper valve stem 4. Inclined lifting grooves 10 are symmetrically opened on both sides of the drive sleeve 6. The drive sleeve 6 is sleeved on the top of the upper valve stem 4, and the two ends of the guide pin 5 are respectively slidably connected in the lifting grooves 10 of the drive sleeve 6. The bellows 7 is sleeved on the outside of the drive sleeve 6. The lower end of the bellows 7 is fixed to the top of the valve body 1, and the upper end of the bellows 7 is fixed to the top of the drive sleeve 6 through a connecting piece. The lifting mechanism 8 is fixed to the top of the valve body 1, and the lifting end of the lifting mechanism 8 is fixed to the top of the drive sleeve 6.

[0016] An improvement is made to the existing ball valve by introducing a bellows 7 as a sealing element to enhance the sealing performance of the ball valve and meet the requirements for conveying toxic and harmful fluids. Specifically, a guide pin 5 is first set at the top of the upper valve stem 4, and a drive sleeve 6 is sleeved on the top of the upper valve stem 4. Since the two ends of the guide pin 5 are respectively slidably connected in the lifting groove 10 of the drive sleeve 6, when the lifting mechanism 8 pulls the drive sleeve 6 up and down, the guide pin 5 will drive the upper valve stem 4 and the ball 3 to rotate under the action of the lifting groove 10, thereby realizing the opening and closing action of the ball valve. Since the bellows 7 is sleeved on the outside of the drive sleeve 6, and the lower end of the bellows 7 is fixed to the top of the valve body 1, and the upper end of the bellows 7 is fixed to the top of the drive sleeve 6 through a connecting piece, the bellows 7 will expand and contract during the opening and closing of the ball valve, thus achieving the sealing function. The bellows-sealed ball valve has high safety and reliability. The bellows element itself has deformability and anti-aging properties, which can overcome the weaknesses of packing sealing valves such as packing aging and temperature difference sensitivity.

[0017] Furthermore, the lifting mechanism 8 includes a housing 11, a lifting rod 12, a threaded tube 13, a connecting seat 14, and a handwheel 15. The housing 11 is fixedly connected to the top of the valve body 1, and the top of the upper valve stem 4 is located inside the housing 11. The lifting rod 12 is slidably connected to the inside of the housing 11 through a guide groove. The connecting seat 14 is set above the top of the housing 11 through a bracket. The threaded tube 13 is movably connected to the connecting seat 14 through a bearing, and the threaded tube 13 is threadedly connected to the top of the lifting rod 12. The handwheel 15 is fixedly connected to the upper part of the threaded tube 13.

[0018] By rotating the handwheel 15, the threaded tube 13 is driven to rotate. Since the threaded tube 13 is connected to the top of the lifting rod 12 by a thread, the lifting rod 12 can achieve the action of lifting and lowering, thereby performing the lifting and lowering operation of the drive sleeve 6.

[0019] Furthermore, a packing seal 9 is provided at the connection between the housing 11 and the lifting rod 12.

[0020] The valve employs a double sealing structure consisting of a bellows and packing, further enhancing its safety and reliability.

[0021] 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 high-sealing bellows ball valve structure, characterized in that, include: The valve body (1), valve seat (2), ball (3), upper valve stem (4), guide pin (5), drive sleeve (6), bellows (7), and lifting mechanism (8) are described. The valve body (1) is a general-purpose valve body for ball valves. The valve seat (2) is located inside the valve body (1). The ball (3) is located inside the valve body (1) and matches the valve seat (2). The upper valve stem (4) is fixed to the top of the ball (3) and the top of the upper valve stem (4) extends out of the top of the valve body (1). The guide pin (5) is horizontally fixed to the top of the upper valve stem (4). The drive sleeve (6) has symmetrical inclined lifting grooves (10) on both sides. The drive sleeve (6) is sleeved on the top of the upper valve stem (4), and the two ends of the guide pin (5) are respectively slidably connected in the lifting groove (10) of the drive sleeve (6). The bellows (7) is sleeved on the outside of the drive sleeve (6). The lower end of the bellows (7) is fixed to the top of the valve body (1), and the upper end of the bellows (7) is fixed to the top of the drive sleeve (6) through a connecting piece. The lifting mechanism (8) is fixed to the top of the valve body (1), and the lifting end of the lifting mechanism (8) is fixed to the top of the drive sleeve (6).

2. The high-sealing bellows ball valve structure according to claim 1, characterized in that, The lifting mechanism (8) includes a housing (11), a lifting rod (12), a threaded tube (13), a connecting seat (14), and a handwheel (15). The housing (11) is fixed to the top of the valve body (1), and the top of the upper valve stem (4) is located inside the housing (11). The lifting rod (12) is slidably connected to the inside of the housing (11) through a guide groove. The connecting seat (14) is set above the top of the housing (11) through a bracket. The threaded tube (13) is movably connected to the connecting seat (14) through a bearing, and the threaded tube (13) is threadedly connected to the top of the lifting rod (12). The handwheel (15) is fixed to the upper part of the threaded tube (13).

3. The high-sealing bellows ball valve structure according to claim 2, characterized in that, A packing seal (9) is provided at the connection between the housing (11) and the lifting rod (12).

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