Ventilation butterfly valve with high sealing performance

Abstract

The utility model belongs to the technical field of valves, and particularly relates to a high-sealing-performance ventilation butterfly valve which comprises a valve body, a clamping groove is formed in the valve body, a valve body is arranged in the valve body, a rotating rod is fixedly connected to the outer wall of the valve body, the rotating rod penetrates through the valve body and is rotationally connected with the valve body, a soft sealing ring is arranged on the valve body, and the valve body is fixedly connected with the valve body. The soft sealing ring is fixedly connected with the valve inner groove. According to the ventilation butterfly valve with the high sealing performance, the soft sealing ring is designed in the inner groove of the valve, and when the soft sealing ring is not inflated, the outer diameter of the soft sealing ring is slightly smaller than the diameter of the valve, so that when the valve rotates, friction between the inner wall of the valve body and the soft sealing ring can be reduced, and the sealing performance of the valve body is improved. And when the valve is limited, the rotating block can extrude the piston rod to enable the soft sealing ring to expand, so that the sealing performance of the valve body is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a ventilation butterfly valve with high sealing performance. Background Art

[0002] The ventilation butterfly valve is a regulating valve with a simple structure. It is mainly used in dust-containing cold air or hot air gas pipelines in ventilation and environmental protection projects in the chemical, building materials, power stations, glass and other industries as a pipeline control device for regulating the flow or cutting off the gas medium.

[0003] At present, most of the existing ventilation butterfly valves are provided with rubber on the outer wall of the valve or the inner wall of the valve body to improve the sealing of the ventilation butterfly valve. However, during the long-term opening or closing of the valve, the rubber pad designed inside will continue to rub, causing the rubber pad to be damaged, thereby affecting the sealing of the ventilation butterfly valve. Utility Model Content

[0004] The main purpose of the utility model is to provide a ventilation butterfly valve with high sealing performance, which can solve the problems raised in the above background technology.

[0005] In order to achieve the above-mentioned purpose, the utility model proposes a high sealing performance ventilation butterfly valve, comprising a valve body, a slot is provided on the valve body, a valve is provided inside the valve body, a rotating rod is fixedly connected to the outer wall of the valve, the rotating rod passes through the valve body and is rotatably connected to the valve body, and the valve is provided with:

[0006] A soft sealing ring, which is fixedly connected to the inner groove of the valve, is hollow inside and can be expanded by injecting gas into the inside of the soft sealing ring;

[0007] A sealing tube, the sealing tube is fixedly connected to the inner wall of the valve, and the sealing tube is fixedly connected to the air inlet of the soft sealing ring;

[0008] A piston rod, the piston rod being slidably connected to the inner wall of the sealing tube;

[0009] Spring 1, one end of the spring 1 is fixedly connected to the outer wall of the piston rod, and the other end of the spring 1 is fixedly connected to the inner wall of the sealing tube;

[0010] A rotating block, the outer wall of which is fixedly connected with a rotating shaft;

[0011] A rotating shaft, the rotating shaft passes through the valve and is rotatably connected to the valve;

[0012] and a movement rod, one end of which is sleeved with the rotating shaft, and the other end of which passes through the rotating rod and is slidably connected with the rotating rod.

[0013] Preferably, the rotating rod is provided with a sliding groove, the sliding groove is slidably connected with a cross bar, and the cross bar is slidably connected to the inner wall of the rotating rod.

[0014] Preferably, the outer wall of the cross bar is fixedly connected with a sliding sleeve, the outer wall of the sliding sleeve is fixedly connected with a handle, and the inner wall of the handle is slidably connected with a pull rod.

[0015] Preferably, one end of the cross bar is fixedly connected to spring 2, the other end of the cross bar is fixedly connected to the movement rod, and one end of the spring 2 away from the cross bar is fixedly connected to the inner wall of the rotating rod to prevent the handle from moving under the action of gravity.

[0016] Preferably, the inner wall of the handle is slidably connected to a sliding rod, the sliding rod is provided with a through slot, the through slot is slidably connected to the pull rod, the outer wall of the sliding rod is hinged to a hinged rod, and the end of the hinged rod away from the sliding rod is hinged to a clamping block.

[0017] Preferably, the card block is slidably connected to the inner wall of the handle, the outer wall of the card block is fixedly connected to a spring three, and one end of the spring three away from the card block is fixedly connected to the inner wall of the handle.

[0018] The utility model provides a ventilation butterfly valve with high sealing performance. It has the following beneficial effects:

[0019] (1) The ventilation butterfly valve with high sealing performance has a soft sealing ring designed in the inner groove of the valve. When the soft sealing ring is not inflated, the outer diameter of the soft sealing ring is slightly lower than the diameter of the valve. The purpose of this design is to reduce the friction between the inner wall of the valve body and the soft sealing ring when the valve rotates, thereby preventing the rubber pad from being damaged due to friction and affecting the sealing performance of the valve body.

[0020] (2) In the process of limiting the position of the ventilating butterfly valve with high sealing performance, the moving rod will exert a force on the rotating shaft, causing the rotating block to rotate. During this process, the rotating block will squeeze the piston rod, so that the air inside the sealing tube will be squeezed into the soft sealing ring, thereby causing the soft sealing ring to expand. The expansion of the soft sealing ring can improve the sealing performance of the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0023] Figure 2 It is a schematic diagram of a partial three-dimensional structure of the utility model;

[0024] Figure 3 This is a schematic diagram of the three-dimensional structure of the cross-section of the valve of the utility model;

[0025] Figure 4 This is a schematic diagram of the three-dimensional cross-sectional structure of the rotating rod of the utility model;

[0026] Figure 5 This is a schematic diagram of the three-dimensional cross-sectional structure of the sealing tube of the utility model;

[0027] Figure 6 The three-dimensional cross-sectional structure of the handle of the utility model is shown in FIG. Figure 1 ;

[0028] Figure 7 The three-dimensional cross-sectional structure of the handle of the utility model is shown in FIG. Figure 2 ;

[0029] Figure 8 Schematic diagram of the cross-sectional structure of the practical valve body.

[0030] Description of Figure Numbers:

[0031] 1. Valve body; 2. Slot; 3. Valve; 31. Soft sealing ring; 32. Sealing tube; 33. Rotating block; 34. Rotating shaft; 35. Moving rod; 36. Spring 1; 37. Piston rod; 4. Rotating rod; 41. Slide groove; 42. Cross bar; 43. Spring 2; 44. Sliding sleeve; 45. Handle; 451. Sliding rod; 452. Through groove; 453. Articulated rod; 454. Slot; 455. Spring 3; 46. Pull rod.

[0032] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0033] 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.

[0034] See also Figure 1-Figure 8The utility model proposes a ventilation butterfly valve with high sealing performance, including a valve body 1, a card slot 2 is opened on the valve body 1, a valve 3 is arranged inside the valve body 1, a rotating rod 4 is fixedly connected to the outer wall of the valve 3, the rotating rod 4 penetrates the valve body 1 and is rotatably connected to the valve body 1, a soft sealing ring 31 is arranged on the valve 3, the inside of the soft sealing ring 31 is designed to be hollow, when gas enters the inside of the soft sealing ring 31, the soft sealing ring 31 can be expanded, and the sealing performance of the valve body 1 is improved by the expansion of the soft sealing ring 31, the soft sealing ring 31 is fixedly connected to the inner groove of the valve 3, when the soft sealing ring 31 is not inflated, the outer diameter of the soft sealing ring 31 is slightly lower than the diameter of the valve 3, the purpose of this design is that when the valve When the door 3 rotates, the friction between the inner wall of the valve body 1 and the soft sealing ring 31 can be reduced. The sealing tube 32 is fixedly connected to the inner wall of the valve 3, and the sealing tube 32 is fixedly connected to the air inlet of the soft sealing ring 31. The piston rod 37 is slidably connected to the inner wall of the sealing tube 32. The spring 36 is fixedly connected to the outer wall of the piston rod 37 at one end, and the other end of the spring 36 is fixedly connected to the inner wall of the sealing tube 32. The rotating block 33 is fixedly connected to the outer wall of the rotating block 33 with a rotating shaft 34, and the rotating shaft 34 passes through the valve 3 and is rotatably connected to the valve 3, and the moving rod 35 is sleeved with the rotating shaft 34 at one end, and the other end of the moving rod 35 passes through the rotating rod 4 and is slidably connected to the rotating rod 4.

[0035] like Figure 3 As shown, when the rotating block 33 rotates, during this process, the rotating block 33 will squeeze the piston rod 37, causing the piston rod 37 to slide on the inner wall of the sealing tube 32, and at the same time, the spring 36 will undergo elastic deformation. It should be noted that the sealing tube 32 and the air inlet of the soft sealing ring 31 are sealed and connected. When the piston rod 37 moves, the air inside the sealing tube 32 will be squeezed into the soft sealing ring 31, thereby causing the soft sealing ring 31 to expand.

[0036] In the embodiment of the utility model, in order to fix the valve 3, specifically, the rotating rod 4 is provided with a slide groove 41, the slide groove 41 is slidably connected with a cross bar 42, the cross bar 42 is slidably connected to the inner wall of the rotating rod 4, the outer wall of the cross bar 42 is fixedly connected with a sliding sleeve 44, the outer wall of the sliding sleeve 44 is fixedly connected with a handle 45, a clamping block 454 is slidably connected to the inner wall of the handle 45, the outer wall of the clamping block 454 is fixedly connected with a spring three 455, one end of the spring three 455 away from the clamping block 454 is fixedly connected to the inner wall of the handle 45, one end of the cross bar 42 is fixedly connected with a spring two 43, the other end of the cross bar 42 is fixedly connected to the motion rod 35, and one end of the spring two 43 away from the cross bar 42 is fixedly connected to the inner wall of the rotating rod 4;

[0037] like Figure 1 and Figure 7As shown, when the handle 45 is pressed, the valve body 1 squeezes the block 454 so that the block 454 completely enters the inner wall of the handle 45. At the same time, the spring 455 undergoes elastic deformation. When the block 454 overlaps with the slot 2, the pressure on the block 454 disappears. At this time, the block 454 bounces into the slot 2 under the elastic force of the spring 455, thereby limiting the rotation rod 4. At the same time, in this process, Figure 3 As shown, when the cross bar 42 moves downward, the moving rod 35 will exert a force on the rotating shaft 34, causing the rotating block 33 to rotate, thereby squeezing the piston rod 37 and causing the soft sealing ring 31 to expand.

[0038] Furthermore, the inner wall of the handle 45 is slidably connected to a pull rod 46, the inner wall of the handle 45 is slidably connected to a sliding rod 451, the sliding rod 451 is provided with a through slot 452, the through slot 452 is slidably connected to the pull rod 46, the outer wall of the sliding rod 451 is hinged to a hinge rod 453, and one end of the hinge rod 453 away from the sliding rod 451 is hinged to a clamping block 454;

[0039] When the pull rod 46 is pulled, the pull rod 46 will slide in the through groove 452. It should be noted that an inclined block is provided at one end of the pull rod 46. When the pull rod 46 slides, the pull rod 46 will apply a force to the sliding rod 451, so that the sliding rod 451 moves upward. At this time, the hinged rod 453 will apply a force to the block 454, so that the block 454 slides toward the inside of the handle 45, thereby releasing the limit between the handle 45 and the valve body 1.

[0040] In the utility model, when in use, the handle 45 is first turned to rotate the valve 3 ninety degrees, and then the handle 45 is pressed. During this process, the block 454 will slide into the handle 45 under the extrusion of the valve body 1. When the block 454 coincides with the slot 2, the block 454 will be stuck into the slot 2 under the elastic force of the spring three 455. At the same time, in the process of pressing the handle 45, the moving rod 35 will apply a force to the rotating shaft 34, so that the rotating block 33 rotates, thereby squeezing the piston rod 37, causing the soft sealing ring 31 to expand, thereby improving the sealing performance of the valve 3.

[0041] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A ventilation butterfly valve with high sealing performance, comprising a valve body (1), characterized in that: The valve body (1) is provided with a slot (2), the valve body (1) is provided with a valve (3) inside, the outer wall of the valve (3) is fixedly connected with a rotating rod (4), the rotating rod (4) passes through the valve body (1) and is rotatably connected to the valve body (1), and the valve (3) is provided with: A soft sealing ring (31), wherein the soft sealing ring (31) is fixedly connected to the inner groove of the valve (3); A sealing tube (32), wherein the sealing tube (32) is fixedly connected to the inner wall of the valve (3), and the sealing tube (32) is fixedly connected to the air inlet of the soft sealing ring (31); A piston rod (37), wherein the piston rod (37) is slidably connected to the inner wall of the sealing tube (32); Spring 1 (36), one end of the spring 1 (36) is fixedly connected to the outer wall of the piston rod (37), and the other end of the spring 1 (36) is fixedly connected to the inner wall of the sealing tube (32); A rotating block (33), wherein the outer wall of the rotating block (33) is fixedly connected to a rotating shaft (34); a rotating shaft (34), the rotating shaft (34) passing through the valve (3) and being rotatably connected to the valve (3); and a movement rod (35), one end of which is sleeved with the rotating shaft (34), and the other end of which passes through the rotating rod (4) and is slidably connected with the rotating rod (4).

2. A ventilation butterfly valve with high sealing performance according to claim 1, characterized in that: The rotating rod (4) is provided with a sliding groove (41), the sliding groove (41) is slidably connected to a cross bar (42), and the cross bar (42) is slidably connected to the inner wall of the rotating rod (4).

3. A ventilation butterfly valve with high sealing performance according to claim 2, characterized in that: The outer wall of the cross bar (42) is fixedly connected with a sliding sleeve (44), the outer wall of the sliding sleeve (44) is fixedly connected with a handle (45), and the inner wall of the handle (45) is slidably connected with a pull rod (46).

4. A ventilation butterfly valve with high sealing performance according to claim 2, characterized in that: One end of the cross bar (42) is fixedly connected to a second spring (43), the other end of the cross bar (42) is fixedly connected to a motion bar (35), and one end of the second spring (43) away from the cross bar (42) is fixedly connected to the inner wall of the rotating bar (4).

5. A ventilation butterfly valve with high sealing performance according to claim 3, characterized in that: The inner wall of the handle (45) is slidably connected to a sliding rod (451), the sliding rod (451) is provided with a through slot (452), the through slot (452) is slidably connected to the pull rod (46), the outer wall of the sliding rod (451) is hinged with a hinged rod (453), and the end of the hinged rod (453) away from the sliding rod (451) is hinged with a clamping block (454).

6. A ventilation butterfly valve with high sealing performance according to claim 5, characterized in that: The clamping block (454) is slidably connected to the inner wall of the handle (45), and a spring three (455) is fixedly connected to the outer wall of the clamping block (454), and one end of the spring three (455) away from the clamping block (454) is fixedly connected to the inner wall of the handle (45).

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