Valve shaft high-pressure air sealing structure

Abstract

The utility model belongs to the technical field of valve shafts, and particularly relates to a valve shaft high-pressure air sealing structure which comprises a valve body, the right side of the valve body is in contact with a filler sealing seat, the outer side of the filler sealing seat is fixedly connected with an installation block, the installation block is in contact with the valve body, and the interior of the installation block is in sliding connection with a sliding block. A clamping block is fixedly connected to the side, close to the valve body, of the sliding block, a clamping groove is formed in the valve body, and a fixing rod is fixedly connected to the interior of the mounting block. By means of the packing sealing seat, the pressing ring, the air sealing ring and other components, the sealing performance between the valve body and the valve shaft can be improved, high-pressure sealing air can be fed into an air hole in the air sealing ring through the sealing high-pressure air connector, the high-pressure sealing air enters a gap of the air sealing ring, and therefore the sealing performance of the valve body is improved. Therefore, the sealing performance between the valve body and the valve shaft is further improved, and the problem of leakage at the joint of the valve shaft and the valve body of the air valve is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of valve shafts, in particular to a valve shaft high-pressure air sealing structure. Background Art

[0002] Air valves play an important role in VOC waste gas treatment systems such as combustion furnaces and metal smelting furnaces. They are mainly used to intercept media or adjust the flow of media in the smoke and air duct system to achieve precise control of the waste gas treatment system. In the VOC waste gas treatment system, the waste gas generated by the combustion furnace and the metal smelting furnace needs to be treated and discharged. As an important part of the smoke and air duct system, the air valve is used to control the flow and direction of the waste gas to meet the emission requirements and the needs of system operation. Referring to the relevant data in the national standard JG 436-2014, the external leakage value of the air valve is 0. Combined with the existing air valve technology, the study found that the external leakage point of the air valve is mainly at the connection between the valve shaft and the valve body. In response to this problem, we proposed a valve shaft high-pressure air sealing structure. Utility Model Content

[0003] The utility model aims to provide a valve shaft high pressure air sealing structure, which solves the problem of leakage at the connection between the air valve shaft and the valve body.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a valve shaft high-pressure air sealing structure, comprising a valve body, the right side of the valve body contacts with a packing sealing seat, the outer side of the packing sealing seat is fixedly connected with a mounting block, the mounting block contacts the valve body, the interior of the mounting block is slidably connected with a slider, the side of the slider close to the valve body is fixedly connected with a clamping block, the valve body is provided with a clamping groove, the interior of the mounting block is fixedly connected with a fixing rod, the fixing rod is slidably connected with the slider, a spring is arranged on the outer side of the fixing rod, a valve shaft is arranged inside the valve body, a valve shaft is arranged inside the packing sealing seat, an air sealing ring is slidably sleeved on the outer side of the valve shaft, the air sealing ring is slidably connected with the packing sealing seat, an air hole is arranged inside the air sealing ring, a sealed high-pressure air interface is fixedly connected inside the packing sealing seat, a pressure ring is slidably sleeved on the outer side of the valve shaft, a packing gland is slidably connected to the right side of the packing sealing seat, the packing gland is slidably connected to the valve shaft, and the packing gland contacts the pressure ring.

[0005] Preferably, the clamping block is in contact with the mounting block, and the clamping block is slidably connected to the clamping slot. The design of the clamping block can limit the mounting block.

[0006] Preferably, one end of the spring contacts the slider, and the other end of the spring contacts the mounting block. The design of the spring can drive the clamping block to limit the mounting block.

[0007] Preferably, a push block is fixedly connected to the upper end of the sliding block, and the push block is in contact with the mounting block. The design of the push block can facilitate the movement of the clamping block.

[0008] Preferably, the sealed high-pressure air interface is in contact with the air sealing ring, and the sealed high-pressure air interface is connected to the air hole. Through the design of the sealed high-pressure air interface, high-pressure sealed air can be delivered into the air sealing ring.

[0009] Preferably, the pressure ring is slidably connected to the packing seal seat, and the pressure ring is in contact with the air seal ring. The design of the pressure ring can increase the sealing effect in the packing seal seat.

[0010] Preferably, the interior of the packing gland is slidably connected with a fixing bolt, and the interior of the packing sealing seat is threadedly connected with a fixing bolt. The design of the fixing bolt can limit the packing gland.

[0011] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0012] 1. The utility model can increase the sealing between the valve body and the valve shaft by providing components such as a packing sealing seat, a pressure ring, and an air sealing ring, and can allow high-pressure sealing air to be sent into the air hole on the air sealing ring through a sealed high-pressure air interface, so that it enters the gap of the air sealing ring, thereby further improving the sealing between the valve body and the valve shaft, and solving the problem of leakage at the connection between the air valve shaft and the valve body.

[0013] 2. The utility model is provided with components such as a mounting block, a slider, and a clamping block. The slider can be driven to move by the elastic force of a spring, so that the slider drives the clamping block to engage with the valve body, thereby fixing the mounting block on the valve body and fixing the packing sealing seat on the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional diagram of the overall structure of the utility model;

[0015] Figure 2 For the utility model Figure 1 A partial structure enlarged front view and cross-sectional view;

[0016] Figure 3 For the utility model Figure 2 A perspective view of an air sealing ring in FIG.

[0017] Figure 4 For the utility model Figure 1 A top sectional view of

[0018] Figure 5 For the utility model Figure 4 A-section structure enlarged view.

[0019] In the figure: 1. valve body; 2. packing seal seat; 3. mounting block; 31. slider; 32. clamping block; 33. clamping groove; 34. fixing rod; 35. spring; 36. push block; 4. valve shaft; 5. air sealing ring; 51. air hole; 52. sealing high-pressure air interface; 53. pressure ring; 54. packing gland; 55. fixing bolt. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-5 A valve shaft high-pressure air sealing structure includes a valve body 1, a packing sealing seat 2 is contacted on the right side of the valve body 1, a mounting block 3 is fixedly connected to the outer side of the packing sealing seat 2, the mounting block 3 is in contact with the valve body 1, a slider 31 is slidably connected inside the mounting block 3, a clamping block 32 is fixedly connected to the side of the slider 31 close to the valve body 1, a clamping groove 33 is opened on the valve body 1, the clamping block 32 is in contact with the mounting block 3, and the clamping block 32 is slidably connected to the clamping groove 33. Through the design of the clamping block 32, the mounting block 3 can be limited. A fixing rod 34 is fixedly connected inside the mounting block 3, the fixing rod 34 is slidably connected to the slider 31, and a spring 35 is arranged on the outer side of the fixing rod 34. One end of the spring 35 is in contact with the slider 31, and the other end of the spring 35 is in contact with the mounting block 3. Through the design of the spring 35, the clamping block 32 can be driven to limit the mounting block 3.

[0022] See also Figure 2-5 A push block 36 is fixedly connected to the upper end of the slider 31, and the push block 36 is in contact with the mounting block 3. The design of the push block 36 can facilitate the movement of the clamping block 32. A valve shaft 4 is arranged inside the valve body 1, and a valve shaft 4 is arranged inside the packing seal seat 2. An air sealing ring 5 is slidably sleeved on the outer side of the valve shaft 4. The air sealing ring 5 is slidably connected to the packing seal seat 2, and an air hole 51 is opened inside the air sealing ring 5. A sealed high-pressure air interface 52 is fixedly connected inside the packing seal seat 2, and the sealed high-pressure air interface 52 is in contact with the air sealing ring 5. The sealed high-pressure air interface 52 is communicated with the air hole 51. Through the design of the sealed high-pressure air interface 52, high-pressure sealing air can be fed into the air sealing ring 5.

[0023] See also Figure 2-5A pressure ring 53 is slidably sleeved on the outer side of the valve shaft 4, and the pressure ring 53 is slidably connected to the packing seal seat 2, and the pressure ring 53 contacts the air seal ring 5. The design of the pressure ring 53 can increase the sealing effect in the packing seal seat 2, and the right side of the packing seal seat 2 is slidably connected to the packing gland 54, and the packing gland 54 is slidably connected to the valve shaft 4, and the packing gland 54 contacts the pressure ring 53. The inside of the packing gland 54 is slidably connected with a fixing bolt 55, and the inside of the packing seal seat 2 is threadedly connected with the fixing bolt 55. The design of the fixing bolt 55 can limit the packing gland 54.

[0024] The specific implementation process of the utility model is as follows: when in use, by moving the two push blocks 36 in a direction close to each other, the push blocks 36 drive the slider 31 to move, and the slider 31 moves on the fixed rod 34, so that the slider 31 squeezes the spring 35, and the slider 31 drives the clamping block 32 to move, and then the packing seal seat 2 is assembled with the valve body 1 and the valve shaft 4, so that the packing seal seat 2 contacts the valve body 1, and the valve shaft 4 enters the packing seal seat 2, so that it is respectively slidably sleeved with the pressure ring 53, the air sealing ring 5 and the packing gland 54 in the packing seal seat 2, The packing seal seat 2 drives the mounting block 3 to contact the valve body 1, and the mounting block 3 drives the clamping block 32 to slide into the clamping groove 33. Then, the push block 36 is released, so that the elastic force of the spring 35 can drive the slider 31 to move, and the slider 31 drives the clamping block 32 to move, so that the clamping block 32 and the valve body 1 are clamped. Then, the packing seal seat 2 can be installed on the valve body 1, and then the high-pressure sealing air is sent into the air hole 51 on the air sealing ring 5 through the sealed high-pressure air interface 52, so that it enters the gap of the air sealing ring 5, thereby further improving the sealing between the valve body 1 and the valve shaft 4.

[0025] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A valve shaft high pressure air sealing structure, comprising a valve body (1), characterized in that: The right side of the valve body (1) contacts with a packing seal seat (2), the outer side of the packing seal seat (2) is fixedly connected with a mounting block (3), the mounting block (3) contacts with the valve body (1), the interior of the mounting block (3) is slidably connected with a slider (31), the side of the slider (31) close to the valve body (1) is fixedly connected with a clamping block (32), the valve body (1) is provided with a clamping groove (33), the interior of the mounting block (3) is fixedly connected with a fixing rod (34), the fixing rod (34) is slidably connected with the slider (31), the outer side of the fixing rod (34) is provided with a spring (35), and the interior of the valve body (1) is provided with a valve shaft ( 4), a valve shaft (4) is arranged inside the packing seal seat (2), an air sealing ring (5) is slidably sleeved on the outer side of the valve shaft (4), the air sealing ring (5) is slidably connected to the packing seal seat (2), an air hole (51) is opened inside the air sealing ring (5), a sealed high-pressure air interface (52) is fixedly connected inside the packing seal seat (2), a pressure ring (53) is slidably sleeved on the outer side of the valve shaft (4), a packing gland (54) is slidably connected to the right side of the packing seal seat (2), the packing gland (54) is slidably connected to the valve shaft (4), and the packing gland (54) is in contact with the pressure ring (53).

2. A valve shaft high pressure air sealing structure according to claim 1, characterized in that: The clamping block (32) contacts the mounting block (3), and the clamping block (32) is slidably connected to the clamping slot (33).

3. A valve shaft high pressure air sealing structure according to claim 1, characterized in that: One end of the spring (35) contacts the slider (31), and the other end of the spring (35) contacts the mounting block (3).

4. A valve shaft high pressure air sealing structure according to claim 1, characterized in that: The upper end of the sliding block (31) is fixedly connected with a push block (36), and the push block (36) is in contact with the mounting block (3).

5. The valve shaft high pressure air sealing structure according to claim 1, characterized in that: The sealed high-pressure air interface (52) is in contact with the air sealing ring (5), and the sealed high-pressure air interface (52) is in communication with the air hole (51).

6. A valve shaft high pressure air sealing structure according to claim 1, characterized in that: The pressure ring (53) is slidably connected to the packing seal seat (2), and the pressure ring (53) is in contact with the air seal ring (5).

7. A valve shaft high pressure air sealing structure according to claim 1, characterized in that: The interior of the packing gland (54) is slidably connected with a fixing bolt (55), and the interior of the packing seal seat (2) is threadedly connected with a fixing bolt (55).

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