Multistage sealing fixed ball valve

Abstract

The utility model belongs to the technical field of ball valves, and particularly relates to a multistage sealing fixed ball valve which comprises a valve body, the top of the valve body is fixedly connected with a top seat, two valve elements are rotatably connected in the valve body, the top of each valve element is provided with a valve rod, the valve rods are rotatably connected with the valve body, and the top seat is fixedly connected with the top seat. A driven gear is fixedly connected to the top of the valve rod, a rotating shaft is installed in the upper end of the top base through a bearing, a driving gear is fixedly connected to the lower end of the rotating shaft, and meshing transmission connection is formed between the driving gear and the driven gear. The two valve elements are arranged in the valve body, the top of the valve rod of each valve element is provided with the driven gear, then the top seat is additionally arranged on the top of the valve body, the rotating shaft capable of rotating is arranged in the top seat, and the driving gear matched with the driven gear is arranged at the bottom of the rotating shaft, so that the valve body is more stable. Opening and closing of the two valve elements can be completed at the same time by rotating the rotating shaft, and therefore the sealing performance of the ball valve is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of ball valves, in particular to a multi-stage sealed fixed ball valve. Background Technique

[0002] A fixed ball valve usually consists of a ball, a valve stem, a valve seat, a valve body, and a sealing ring, etc. During operation, by rotating the operating rod, the ball rotates 90 degrees to achieve the opening or closing of the valve.

[0003] The invention patent with the publication number of CN103727257A discloses a fixed ball valve, including: a valve body, a ball, a valve stem, and a valve seat. The ball and the valve stem are of an integral structure. Upper bearings and lower bearings are respectively arranged at the top and bottom of the ball for support. A compression spring is arranged on the side of the valve seat relative to the ball, and both ends of the compression spring respectively abut against the valve body and the valve seat. For this fixed ball valve, a spring-preloaded floating valve seat is adopted. Whether the valve is in the fully open or fully closed state, the valve seats on the upstream and downstream sides block the fluid, enhancing the sealing performance. Moreover, when foreign objects in the medium or a fire cause accidental failure of the valve seat seal, the grease injection valve provides a quick connection with a grease gun, facilitating the injection of sealing grease into the valve seat sealing part to relieve leakage. At the same time, an O-ring is also arranged on the packing gland to ensure the reliability of the valve stem seal. Additionally, the added graphite packing and sealing grease injection minimize the valve stem leakage after a fire.

[0004] Most of the existing fixed ball valves are of a single-stage sealing structure, that is, one valve core, and the sealing performance still needs to be improved. Moreover, the rotating valve stem is prone to looseness, which will also affect the sealing performance of the ball valve. Therefore, improvements are needed. Content of the Utility Model

[0005] The purpose of the utility model is to provide a multi-stage sealed fixed ball valve, which solves the problem that most of the existing fixed ball valves are of a single-stage sealing structure, that is, one valve core, and the sealing performance still needs to be improved. At the same time, it solves the problem that the rotating valve stem is prone to looseness, which will also affect the sealing performance of the ball valve.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A multi-stage sealed fixed ball valve, including a valve body, a top seat is fixedly connected to the top of the valve body, two valve cores are rotatably connected inside the valve body, a valve stem is arranged at the top of each valve core, the valve stem is rotatably connected to the valve body, a driven gear is fixedly connected to the top of the valve stem, a rotating shaft is installed inside the upper end of the top seat through a bearing, a driving gear is fixedly connected to the lower end of the rotating shaft, and a meshing transmission connection is formed between the driving gear and the driven gear. A switch locking mechanism is arranged on the top seat.

[0007] Preferably, a knob is fixedly connected to the top of the rotating shaft, and the knob is made of plastic. Through the setting of the knob, it is convenient to rotate the rotating shaft.

[0008] Preferably, the switch locking mechanism includes two sliding rods slidably connected to the inside of the upper end of the top seat. A convex block is fixedly connected to the bottom of each sliding rod. A linkage ring is slidably connected to the outside of the convex block, and the linkage ring is sleeved on the outside of the rotating shaft. A guiding block is fixedly connected to the inner wall of the inner ring of the linkage ring, and the guiding block is slidably connected to the rotating shaft. A clamping block is fixedly connected to the upper end of the linkage ring, and a clamping ring is fixedly connected to the inner top of the top seat. The clamping ring is clamped with the clamping block. Through the setting of the switch locking mechanism, it has a locking effect on the opening and closing of the rotating shaft.

[0009] Preferably, a pressure ring is fixedly connected to the tops of the two sliding rods together, and the pressure ring is sleeved on the outside of the rotating shaft. Through the setting of the pressure ring, it is convenient to apply pressure to the two sliding rods simultaneously.

[0010] Preferably, a support frame is fixedly connected to the inner top of the top seat and located outside the linkage ring. A cushion rod is slidably connected to the inside of the horizontal part of the support frame. A cushion block is fixedly connected to the top of the cushion rod, and the cushion block abuts against the linkage ring. Through the setting of the cushion rod and the cushion block, it has an auxiliary supporting effect on the linkage ring.

[0011] Preferably, a spring is sleeved on the outer side of the rod body of the cushion rod. One end of the spring is fixedly connected to the cushion block, and the other end of the spring is fixedly connected to the support frame. Through the setting of the spring, it has an elastic supporting effect on the linkage ring.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] 1. The present utility model sets two valve cores in the valve body, and a driven gear is arranged at the top of the valve rod of each valve core. Then, a top seat is added to the top of the valve body, a rotatable rotating shaft is arranged in the top seat, and a driving gear cooperating with the driven gear is arranged at the bottom of the rotating shaft. In this way, by rotating the rotating shaft, the opening and closing of the two valve cores can be completed simultaneously, thereby improving the sealing performance of the ball valve.

[0014] 2. The present utility model sets a switch locking mechanism on the top seat. Among them, by pushing the sliding rod through the pressure ring, the linkage ring moves downward, so that the clamping block on the linkage ring is separated from the clamping ring on the top seat, and thus the locking of the rotating shaft can be released. Conversely, the rotating shaft can be locked, thereby ensuring the stability of the valve core switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a three-dimensional view of the overall structure of the present utility model;

[0016] Figure 2 is the Figure 1 front elevation sectional view of the present utility model;

[0017] Figure 3 For the Figure 2 enlarged view of the switch locking mechanism of the

[0018] Figure 4 For the Figure 1 three-dimensional view of the knob of the

[0019] In the figure: 1, valve body; 2, top seat; 3, valve core; 4, valve stem; 5, driven gear; 6, rotating shaft; 7, driving gear; 8, knob; 9, switch locking mechanism; 91, sliding rod; 92, pressure ring; 93, convex block; 94, linkage ring; 95, guiding block; 96, clamping block; 97, clamping ring; 98, support frame; 99, cushion rod; 910, spring; 911, cushion block. Specific embodiments

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] Please refer to Figures 1-4 , a multi-stage sealed fixed ball valve, including a valve body 1, a top seat 2 is fixedly connected to the top of the valve body 1, two valve cores 3 are rotatably connected inside the valve body 1, a valve stem 4 is arranged at the top of each valve core 3, the valve stem 4 is rotatably connected to the valve body 1, the top of the valve stem 4 is fixedly connected to a driven gear 5, a rotating shaft 6 is installed inside the upper end of the top seat 2 through a bearing, a driving gear 7 is fixedly connected to the lower end of the rotating shaft 6, and a meshing transmission connection is formed between the driving gear 7 and the driven gear 5. A knob 8 is fixedly connected to the top of the rotating shaft 6, and the knob 8 is made of plastic. Through the setting of the knob 8, it is convenient to rotate the rotating shaft 6.

[0022] Please refer to Figures 2-3 , a switch locking mechanism 9 is arranged on the top seat 2. Through the setting of the switch locking mechanism 9, the opening and closing of the rotating shaft 6 have a locking effect. The switch locking mechanism 9 includes two sliding rods 91 slidably connected inside the upper end of the top seat 2. A pressure ring 92 is fixedly connected to the tops of the two sliding rods 91, and the pressure ring 92 is sleeved outside the rotating shaft 6. Through the setting of the pressure ring 92, it is convenient to apply pressure to the two sliding rods 91 at the same time. A convex block 93 is fixedly connected to the bottom of each sliding rod 91. A linkage ring 94 is slidably connected to the outside of the convex block 93, and the linkage ring 94 is sleeved outside the rotating shaft 6. A guiding block 95 is fixedly connected to the inner wall of the inner ring of the linkage ring 94, and the guiding block 95 is slidably connected to the rotating shaft 6. A clamping block 96 is fixedly connected to the upper end of the linkage ring 94, and a clamping ring 97 is fixedly connected to the inner top of the top seat 2. The clamping ring 97 is clamped with the clamping block 96.

[0023] Please refer to Figure 3 Figure 3 , a support frame 98 is fixedly connected to the inner top of the top seat 2 and located outside the linkage ring 94. A cushion rod 99 is slidably connected inside the horizontal part of the support frame 98. A cushion block 911 is fixedly connected to the top of the cushion rod 99, and the cushion block 911 abuts against the linkage ring 94. Through the arrangement of the cushion rod 99 and the cushion block 911, it has an auxiliary supporting effect on the linkage ring 94. A spring 910 is sleeved outside the rod body of the cushion rod 99. One end of the spring 910 is fixedly connected to the cushion block 911, and the other end of the spring 910 is fixedly connected to the support frame 98. Through the arrangement of the spring 910, it has an elastic supporting effect on the linkage ring 94.

[0024] The specific implementation process of the present utility model is as follows: When in use, first, two sliding rods 91 are pushed downward by the pressing ring 92. The two sliding rods 91 push the linkage ring 94 through the convex blocks 93, so that the guiding blocks 95 on the linkage ring 94 slide on the rotating shaft 6. At this time, the spring 910 is compressed. At the same time, the clamping block 96 on the linkage ring 94 is disengaged from the clamping ring 97, thus releasing the restriction on the rotating shaft 6. Subsequently, the rotating shaft 6 is rotated by the knob 8. The rotating shaft 6 drives the driving gear 7 to rotate. The driving gear 7 drives the two valve cores 3 to open and close simultaneously through the cooperation with the driven gear 5. Then, after the pressing ring 92 is released, the linkage ring 94 will reset under the action of the spring 910, and the clamping block 96 is re-engaged with the clamping ring 97, which can lock the rotating shaft 6, thereby ensuring the stability of the opening and closing of the valve core 3.

[0025] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A multi-stage sealed fixed ball valve, comprising a valve body (1), characterized in that: A top seat (2) is fixedly connected to the top of the valve body (1). Two valve cores (3) are rotatably connected inside the valve body (1). A valve rod (4) is provided at the top of each valve core (3). The valve rod (4) is rotatably connected to the valve body (1). A driven gear (5) is fixedly connected to the top of the valve rod (4). A rotating shaft (6) is installed inside the upper end of the top seat (2) through a bearing. A driving gear (7) is fixedly connected to the lower end of the rotating shaft (6), and a meshing transmission connection is formed between the driving gear (7) and the driven gear (5). A switch locking mechanism (9) is provided on the top seat (2).

2. The multi-stage sealed fixed ball valve according to claim 1, characterized in that: A knob (8) is fixedly connected to the top of the rotating shaft (6), and the knob (8) is made of plastic material.

3. A multi-stage sealed fixed ball valve according to claim 1, characterized in that: The switch locking mechanism (9) includes two sliding rods (91) slidably connected inside the upper end of the top seat (2). A convex character block (93) is fixedly connected to the bottom of each sliding rod (91). A linkage ring (94) is slidably connected to the outside of the convex character block (93), and the linkage ring (94) is sleeved on the outside of the rotating shaft (6). A guiding block (95) is fixedly connected to the inner wall of the inner ring of the linkage ring (94). The guiding block (95) is slidably connected to the rotating shaft (6). A clamping block (96) is fixedly connected to the upper end of the linkage ring (94). A clamping ring (97) is fixedly connected to the inner top of the top seat (2). The clamping ring (97) is clamped with the clamping block (96).

4. The multi-stage sealed fixed ball valve according to claim 3, characterized in that: A pressure ring (92) is fixedly connected to the tops of the two sliding rods (91) together, and the pressure ring (92) is sleeved on the outside of the rotating shaft (6).

5. The multi-stage sealed fixed ball valve according to claim 3, characterized in that: A support frame (98) is fixedly connected to the inner top of the top seat (2) and on the outside of the linkage ring (94). A cushion rod (99) is slidably connected inside the horizontal part of the support frame (98). A cushion block (911) is fixedly connected to the top of the cushion rod (99), and the cushion block (911) abuts against the linkage ring (94).

6. The multi-stage sealed fixed ball valve according to claim 5, characterized in that: A spring (910) is sleeved on the outer side of the rod body of the cushion rod (99). One end of the spring (910) is fixedly connected to the cushion block (911), and the other end of the spring (910) is fixedly connected to the support frame (98).

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