Ceramic hard sealing high-performance butterfly valve

Abstract

The utility model relates to a ceramic hard sealing high-performance butterfly valve, which comprises a valve body, a butterfly plate and a valve rod, a valve cavity is arranged in the valve body, the butterfly plate is positioned in the valve cavity, the butterfly plate is arranged in the valve cavity, a clamping block used for clamping one side of the butterfly plate is arranged on the inner side wall of the valve cavity, a fixing pipe is arranged on the rear end face of the butterfly plate, and the valve rod is arranged in the valve cavity. A rotating groove is formed in the position, under the fixing pipe, of the valve cavity, the lower end of the valve rod sequentially penetrates through the top of the valve body and the fixing pipe and then stretches into the rotating groove, a first stepped annular table part and a second stepped annular table part are sequentially arranged on the end face of the front side face of the valve body, and a ceramic sealing valve seat is arranged on the second annular table part. A valve body insert is arranged on the first annular table part and located on the outer side of the ceramic sealing valve seat. According to the ceramic hard sealing high-performance butterfly valve, the problems that in the using process of an existing butterfly valve, due to the fact that a pressing ring moves, the sealing performance of the whole butterfly valve is poor, and the service life is short are solved.

Description

Technical Field

[0001] The utility model specifically relates to a ceramic hard-sealed high-performance butterfly valve. Background Art

[0002] A butterfly valve, also known as a flap valve, is a simple regulating valve that can be used for the on-off control of low-pressure pipeline media. A butterfly valve is a valve whose closing part is a disc that rotates around the valve shaft to achieve opening and closing. The valve plate can be driven by the valve stem. If it rotates ninety degrees, it can complete one opening and closing. By changing the deflection angle of the valve plate, the flow of the medium can be controlled. The valve plate and valve body of an existing butterfly valve are often connected by two components: a valve seat and a pressure ring. The pressure ring is made of rubber and bonded to the outer surface of the valve seat. During use, the pressure ring is easy to move, resulting in poor sealing of the entire butterfly valve, which shortens the service life of the butterfly valve. Utility Model Content

[0003] In view of the deficiencies in the prior art, the technical problem to be solved by the utility model is to provide a ceramic hard-sealed high-performance butterfly valve.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a ceramic hard-sealed high-performance butterfly valve, including a valve body, a disc plate and a valve stem, a valve body is provided with a valve cavity, the disc plate is located in the valve cavity, a disc plate is provided in the valve cavity, a clamping block for clamping one side of the disc plate is provided on the inner side wall of the valve cavity, a fixing tube is provided on the rear end face of the disc plate, a rotation groove is provided in the valve cavity directly below the fixing tube, the lower end of the valve stem passes through the top of the valve body and the fixing tube in sequence and extends into the rotation groove, the front side end face of the valve body is sequentially provided with a stepped first ring platform portion and a second ring platform portion, a ceramic sealing valve seat is provided on the second ring platform portion, a valve body insert is provided on the first ring platform portion, and the valve body insert is located on the outside of the ceramic sealing valve seat.

[0005] Preferably, a mounting seat is provided on the top of the valve body, a limiting block is sleeved on the valve stem, and the limiting block is detachably mounted on the mounting seat.

[0006] Preferably, a packing cavity is formed between the mounting seat and the valve body, and the packing cavity is filled with sealing packing.

[0007] Preferably, the sealing filler is one of a polytetrafluoroethylene V-ring filler or a graphite asbestos filler.

[0008] Preferably, the valve body is sleeved with a first bearing and a second bearing, the first bearing is located between the packing cavity and the disc plate, and the second bearing is located in the rotating groove.

[0009] Preferably, the first bearing and the second bearing are both stainless steel bearings, and RPTFE linings are provided on the inner and outer surfaces of the stainless steel bearings.

[0010] Preferably, a first thrust washer is provided at the bottom of the first bearing, and a second thrust washer is provided at the top of the second bearing.

[0011] Preferably, flat portions are symmetrically provided on both sides of the upper end portion of the valve stem.

[0012] Compared with the prior art, the utility model has the following beneficial effects: the ceramic hard-sealed high-performance butterfly valve has a stepped first ring land portion and a second ring land portion arranged on the valve body, and a valve body insert and a ceramic sealing valve seat are respectively arranged on the first ring land portion and the second ring land portion, thereby improving the problem of the prior art butterfly valve having poor sealing performance and short service life due to the movement of the pressure ring during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of an embodiment of the utility model.

[0014] Figure 2 It is a schematic cross-sectional view of a card block according to an embodiment of the utility model.

[0015] Markings in the figure: 1. valve body; 2. disc plate; 3. valve stem; 4. fixed tube; 5. rotating groove; 6. first ring platform; 7. second ring platform; 8. ceramic sealing valve seat; 9. valve body insert; 10. mounting seat; 11. limit block; 12. sealing packing; 13. first bearing; 14. second bearing; 15. first thrust washer; 16. second thrust washer; 17. flat part; 18. clamping block; 19. semicircular clamping plate; 20. arc convex plate. DETAILED DESCRIPTION

[0016] In order to make the above features and advantages of the present invention more obvious and understandable, embodiments are given below with reference to the accompanying drawings for detailed description as follows.

[0017] like Figure 1~2As shown, a ceramic hard-sealed high-performance butterfly valve comprises a valve body 1, a disc plate 2 and a valve stem 3, wherein a valve cavity is arranged in the valve body 1, the disc plate 2 is located in the valve cavity, the disc plate 2 is arranged in the valve cavity, a clamping block 18 for clamping one side of the disc plate 2 is arranged on the inner side wall of the valve cavity, the clamping block comprises a semicircular clamping plate 19 and an arc-shaped convex plate 20, a clamping groove is formed between the arc-shaped convex plate 19 and the semicircular clamping plate 20, the arc-shaped convex plate 20 is made of elastic material, a fixing pipe 4 is arranged on the rear end surface of the disc plate 2, a rotating groove 5 is arranged at the valve cavity directly below the fixing pipe 4, and the lower end of the valve stem 3 passes through the top of the valve body 1 and the fixing pipe 4 in sequence. The fixed pipe 4 extends into the rotating groove 5 at the rear, and the valve stem 3 and the fixed pipe 4 are fixedly connected by a press-in direct pin, which makes the appearance neater and effectively enhances the flow performance of the medium. The front side end face of the valve body 1 is sequentially provided with a stepped first ring platform 6 and a second ring platform 7, and a ceramic sealing valve seat 8 is provided on the second ring platform 7. A valve body insert 9 is provided on the first ring platform 6, and a mounting hole is opened on the valve body insert 9. The valve body insert 9 is installed on the first ring platform 6 through a pin shaft, and the ceramic sealing valve seat 8 is located between the valve body insert 9 and the second ring platform 7, and the valve body insert 9 is located on the outside of the ceramic sealing valve seat 8.

[0018] In this embodiment, a mounting seat 10 is disposed on the top of the valve body 1 , and a limiting block 11 is sleeved on the valve stem 3 . The limiting block 11 is detachably mounted on the mounting seat 10 .

[0019] In this embodiment, a packing cavity is formed between the mounting seat 10 and the valve body 1 , and the packing cavity is filled with a sealing packing 12 .

[0020] In this embodiment, the sealing filler 12 is a polytetrafluoroethylene V-ring filler or a graphite asbestos filler.

[0021] In this embodiment, a first bearing 13 and a second bearing 14 are sleeved on the valve body 1 . The first bearing 13 is located between the packing cavity and the disc plate 2 , and the second bearing 14 is located in the rotating groove 5 .

[0022] In this embodiment, the first bearing 13 and the second bearing 14 are both stainless steel bearings, and RPTFE linings are provided on the inner and outer surfaces of the stainless steel bearings.

[0023] In this embodiment, a first thrust washer 15 is disposed at the bottom of the first bearing 13 , and a second thrust washer 16 is disposed at the top of the second bearing 14 .

[0024] In this embodiment, flat portions 17 are symmetrically provided on both sides of the upper end portion of the valve stem 3 .

[0025] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Any simple modification, equalization change and modification made to the above embodiment by any technician familiar with the field without departing from the content of the technical solution of the present invention based on the technical essence of the present invention shall fall within the scope of the present invention.

Claims

1. A ceramic hard-sealed high-performance butterfly valve, characterized in that: The utility model comprises a valve body, a disc plate and a valve stem, wherein a valve cavity is arranged in the valve body, the disc plate is located in the valve cavity, a disc plate is arranged in the valve cavity, a clamping block for clamping one side of the disc plate is arranged on the inner side wall of the valve cavity, a fixing tube is arranged on the rear end face of the disc plate, a rotation groove is arranged in the valve cavity directly below the fixing tube, the lower end of the valve stem passes through the top of the valve body and the fixing tube in sequence and extends into the rotation groove, a stepped first annular portion and a second annular portion are arranged in sequence on the front side face of the valve body, a ceramic sealing valve seat is arranged on the second annular portion, a valve body insert is arranged on the first annular portion, and the valve body insert is located on the outside of the ceramic sealing valve seat.

2. The ceramic hard-sealed high-performance butterfly valve according to claim 1 is characterized in that: A mounting seat is arranged on the top of the valve body, a limiting block is sleeved on the valve stem, and the limiting block is detachably mounted on the mounting seat.

3. The ceramic hard-sealed high-performance butterfly valve according to claim 2 is characterized in that: A packing cavity is formed between the mounting seat and the valve body, and the packing cavity is filled with sealing packing.

4. The ceramic hard-sealed high-performance butterfly valve according to claim 3 is characterized in that: The sealing filler is one of a polytetrafluoroethylene V-ring filler or a graphite asbestos filler.

5. The ceramic hard-sealed high-performance butterfly valve according to claim 3 is characterized in that: The valve body is sleeved with a first bearing and a second bearing, the first bearing is located between the packing cavity and the disc plate, and the second bearing is located in the rotating groove.

6. The ceramic hard-sealed high-performance butterfly valve according to claim 5 is characterized in that: The first bearing and the second bearing are both stainless steel bearings, and RPTFE linings are provided on the inner and outer surfaces of the stainless steel bearings.

7. The ceramic hard-sealed high-performance butterfly valve according to claim 5 is characterized in that: A first thrust washer is disposed at the bottom of the first bearing, and a second thrust washer is disposed at the top of the second bearing.

8. The ceramic hard-sealed high-performance butterfly valve according to claim 1 is characterized in that: Flat portions are symmetrically arranged on both sides of the upper end portion of the valve stem.

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