CN212338207U

CN212338207U - Jacket butterfly valve convenient to maintain and good in sealing performance

Info

Publication number: CN212338207U
Application number: CN202020573390.2U
Authority: CN
Inventors: 张奇特; 胡智源
Original assignee: Yongjia Dahong Valve Co ltd
Current assignee: Yongjia Dahong Valve Co ltd
Priority date: 2020-04-16
Filing date: 2020-04-16
Publication date: 2021-01-12
Anticipated expiration: 2030-04-16

Abstract

The utility model discloses a jacket butterfly valve convenient for maintenance and good in sealing performance, which has the technical scheme that a valve rod penetrates through a valve body, an end cover used for covering the bottom end of the valve rod is arranged on the valve body, an air inlet hole and a water outlet hole which are used for communicating the inside of the valve body with the outside are arranged on the end cover, the air inlet hole and the water outlet hole can be detachably connected with a sealing element, steam is introduced into the valve body through the air inlet hole, and water after the steam is condensed is discharged out of the valve body through the water; the grease injection valve is characterized in that a grease injection hole and a grease injection valve correspondingly connected with the grease injection hole are formed in the valve body, the grease injection valve further comprises a clamping sleeve, sealing filler and a packing gland, the clamping sleeve and the sealing filler are arranged on the outer side of the valve rod, the inner end of the clamping sleeve corresponds to the grease injection hole, the outer end of the clamping sleeve is attached to the sealing filler, the sealing filler is located above the clamping sleeve and attached to the packing gland, the packing gland is connected to the end portion of the valve body far away from the end cover, and the problems that the sealing performance is poor and the.

Description

Jacket butterfly valve convenient to maintain and good in sealing performance

Technical Field

The utility model relates to a butterfly valve field, more specifically the clamp cover butterfly valve that is convenient for maintain and the leakproofness is good that says so.

Background

The butterfly valve has the advantages of simple structure, simple and convenient operation, quick opening and closing and good flow regulation function, and is widely applied to the fields of petroleum, coal gas, chemical industry, water treatment and the like. The jacket butterfly valve is a common butterfly valve, the butterfly valve is a fluid pipeline valve, and has strict requirements on the tightness of the valve, the prior art mostly adopts a mode of arranging a sealing element between a valve rod and a valve body, but in the using process, because the tightness between the sealing element and the valve rod or between the sealing element and the valve body does not reach the matching requirement, or under the long-term mutual abrasion between the valve rod and the sealing element, a gap is formed between the sealing element and the valve rod, the problem of leakage of the jacket butterfly valve is caused, and the operation is complicated if the sealing element needs to be disassembled and replaced; the long-term use of butterfly valve in the pipeline of coking coal gas making system can cause the surface of valve rod can the adhesion sintering oil or other impurity, so can influence the motion of valve rod relative valve body, still can influence the life and the performance of valve rod and valve body simultaneously.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide a leakproofness is good, can wash the valve rod and be convenient for maintain press from both sides cover butterfly valve.

In order to achieve the above purpose, the utility model provides a following technical scheme: a jacket butterfly valve convenient to maintain and good in sealing performance comprises a valve body, a butterfly plate, a valve rod and a valve seat, wherein the butterfly plate is fixedly installed on the valve rod through a lug on the back of the butterfly plate, the valve rod, the valve body and the butterfly plate are of a three-eccentric structure, the valve seat is abutted against the butterfly plate, the valve rod penetrates through the valve body, an end cover used for covering the bottom end of the valve rod is arranged on the valve body, an air inlet hole and a water outlet hole which are used for communicating the inside of the valve body with the outside are formed in the end cover, sealing parts can be detachably connected with the air inlet hole and the water outlet hole, steam is introduced into the valve body through the air;

the valve body is provided with a grease injection hole and a grease injection valve correspondingly connected with the grease injection hole, and further comprises a clamping sleeve, sealing filler and a packing gland, wherein the clamping sleeve and the sealing filler are arranged on the outer side of the valve rod, the inner end of the clamping sleeve corresponds to the grease injection hole, the outer end of the clamping sleeve is attached to the sealing filler, the sealing filler is positioned above the clamping sleeve and attached to the packing gland, and the packing gland is connected to the end part of the valve body, which is far away from the end cover.

As a further improvement, the air inlet hole is arranged near the edge of the end cover, and the water outlet hole is arranged at the center of the end cover.

As a further improvement of the utility model, be provided with the sealing ring between end cover and the valve body and this sealing ring and valve rod contactless.

As a further improvement of the utility model, annotate the fat hole, annotate fat valve and cutting ferrule and be two, be located the sealed packing that annotates fat valve injection valve internal of low department and be located between two cutting ferrules.

As a further improvement, the butterfly plate is provided with a plurality of criss-cross reinforcing ribs on the end face deviating from the valve rod.

As a further improvement of the utility model, be provided with bipolar seal circle on the butterfly plate, bipolar seal circle comprises high-pressure seal circle, spacer ring and low pressure sealing washer.

As a further improvement of the utility model, the valve seat is provided with a wear-resistant part which is inconsistent with the bipolar sealing ring.

The utility model has the advantages that: the end cover is arranged at the bottom end of the valve rod, the end cover is provided with the air inlet hole and the water outlet hole, the detachable sealing elements are arranged on the air inlet hole and the water outlet hole, the valve rod is cleaned by removing the sealing elements and introducing steam into the air inlet hole, and liquid substances formed after cleaning are discharged from the water outlet hole;

compared with the prior art that the sealing packing is adopted by adopting parts such as sealing rings and the like, the sealing performance between the valve rod and the valve body is improved, and the valve body is more convenient to maintain; because of the driving piece passes through the connecting plate to be connected with the valve body, gland's design is compared and is directly can be avoided sealing packing to produce ascending thrust and influence the connection stability between driving piece and the valve body with the mode of the spacing sealing packing of connecting plate.

Drawings

Fig. 1 is a front view of the present invention;

fig. 2 is a right sectional view of the present invention;

FIG. 3 is an enlarged view taken at A in FIG. 2;

FIG. 4 is an enlarged view at B in FIG. 2;

fig. 5 is an enlarged view at C in fig. 2.

Reference numerals: 1. a valve body; 2. a butterfly plate; 3. a valve stem; 4. a valve seat; 5. an end cap; 6. air inlet holes; 7. A water outlet hole; 8. a seal member; 9. a grease injection hole; 10. a grease injection valve; 11. a card sleeve; 12. sealing and filling; 13. A packing gland; 14. a seal ring; 15. reinforcing ribs; 16. a bipolar seal ring; 17. a wear part.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. In which like parts are designated by like reference numerals.

Referring to fig. 1 to 5, a jacketed butterfly valve of this embodiment includes a valve body 1, a butterfly plate 2, a valve rod 3 and a valve seat 4, the butterfly plate 2 is fixedly mounted on the valve rod 3 through a lug on the back surface thereof, the valve rod 3, the valve body 1 and the butterfly plate 2 adopt a triple eccentric structure, the valve seat 4 is abutted to the butterfly plate 2, based on the prior art, both ends of the valve rod 3 penetrate out of the valve body 1, the upper end of the valve rod 3 is connected with a driving member, the lower end of the valve rod 3 is provided with an end cover 5, the end cover 5 is connected with the valve body 1 through a bolt fastening manner and seals the valve body 1, the end cover 5 is provided with an air inlet hole 6 and a water outlet hole 7 for communicating the inside of the valve body 1 with the outside, the air inlet hole 6 and the water outlet hole 7 can be detachably connected with a sealing member 8, because the sealing member 8 is, the sealing element 8 corresponding to the air inlet 6 can be a one-way valve with the same function as the grease injection valve 10, the one-way valve is fixedly connected with the air inlet 6, in an initial state, a bolt is screwed at the water outlet 7, the one-way valve at the air inlet 6 is in a closed state, when the valve rod 3 needs to be cleaned, the bolt at the water outlet 7 is screwed out, the one-way valve at the air inlet 6 is connected with an external vent pipe, steam is injected into the valve body 1 through the vent pipe and flows through the rod body of the valve rod 3 from bottom to top, the steam is liquefied on the rod body and flows down along the rod body, the sintering oil on the rod body is heated and flows down along with the water, impurities on the rod body are washed off by the liquefied water, the water with the sintering oil and the impurities flows out of the water outlet 1 from the water outlet 7, ventilation is stopped until cleaning is finished, when no water flows out from the water outlet 7, the bolt is screwed on the valve rod body, compared with the design, the prior art, the valve rod The operation is simpler and more convenient, the steam has higher temperature and can perform heat preservation on the valve body 1, the service performance of the valve body 1 and the valve rod 3 is favorably improved, and the service lives of the valve body 1 and the valve rod 3 are prolonged;

the valve body 1 is provided with a grease injection hole 9 and a grease injection valve 10 correspondingly connected with the grease injection hole 9, the grease injection hole 9 is positioned at the upper end of the valve body 1, the valve body further comprises a cutting sleeve 11, a sealing filler 12 and a filler cover 13, the cutting sleeve 11 and the sealing filler 12 are both arranged at the outer side of the valve rod 3, the inner end of the cutting sleeve 11 corresponds to the grease injection hole 9, the outer end of the cutting sleeve 11 is attached to the sealing filler 12, the filler cover 13 is fixedly connected to the upper end of the valve body 1 in a bolt fastening mode, the sealing filler 12 is injected into the valve body 1 through the grease injection valve 10 and is filled above the cutting sleeve 11 through the cutting sleeve 11 until the sealing filler 12 is attached to the filler cover 13, the sealing filler 12 can adopt pine resin or resin, the molecular diameter of the sealing filler 12 is large, the gap between the cutting sleeve and the valve rod 1 cannot be passed through, the sealing filler 12 is supplemented into the valve body 1, compared with the prior art that parts such as a sealing ring and the like are adopted, the sealing performance between the valve rod 3 and the valve body 1 is improved, and the valve body is more convenient to maintain; because the driving piece passes through the connecting plate to be connected with valve body 1, the design of gland 13 is compared and is directly can be avoided sealing 12 to produce ascending thrust and influence the stability of being connected between driving piece and the valve body 1 with the mode of connecting plate spacing sealing 12.

As a specific embodiment of the improvement, referring to fig. 3, the edge of the air inlet 6 near the end cover 5 is provided to facilitate the steam to flow upward along the stem of the valve stem 3, compared with the center of the air inlet 6 near the end cover 5, so as to slow down the block of the end of the valve stem 3 on the steam, and at the same time, the steam is gas and has a higher temperature, and the steam molecules move violently and easily diffuse around the stem; the central setting that apopore 7 is located end cover 5 compares and can do benefit to along valve rod 3 rivers water collection and from apopore 7 outflow with apopore 7 is close to the peripheral setting of end cover 5.

As a modified specific embodiment, referring to fig. 3, a sealing ring 14 is arranged between the end cover 5 and the valve body 1, and the sealing ring 14 is not in contact with the valve rod 3, and the sealing ring 14 is used for improving the sealing performance between the end cover 5 and the valve body 1 and does not influence the upward flow of steam.

As an improved specific embodiment, referring to fig. 4, two grease injection holes 9, two grease injection valves 10 and two clamping sleeves 11 are provided, the sealing filler 12 injected into the valve body 1 by the grease injection valve 10 located at a lower position is located between the two clamping sleeves 11, grease is injected to corresponding positions through the two grease injection holes 9, the two sealing fillers 12 are distributed vertically, when one sealing filler 12 is consumed faster and the other sealing filler 12 still can maintain the sealing property, the sealing filler 12 consumed faster generates negative pressure, and the two sealing fillers 12 move to the gap between the valve rod 3 and the clamping sleeve 11, so that the vacuum negative pressure sealing property can be increased compared with the design of only one grease injection hole 9 and one clamping sleeve 11, and the sealing property between the valve rod 3 and the valve body 1 is further improved.

As an improved specific embodiment, referring to fig. 1, a plurality of criss-cross reinforcing ribs 15 are arranged on the end surface of the butterfly plate 2 away from the valve rod 3, a plurality of grooves can be formed on the end surface of the common butterfly plate 2, the grooves are arranged in an array, the reinforcing ribs 15 are formed on the part which is not dug, and the design of the reinforcing ribs 15 can improve the strength of the butterfly plate 2 and prolong the service life of the butterfly plate 2.

As a modified specific embodiment, referring to fig. 5, a double-pole seal ring 16 is arranged on the butterfly plate 2, the double-pole seal ring 16 is composed of a high-pressure seal ring, a spacer ring and a low-pressure seal ring, the high-pressure seal ring is located at the inlet side of the channel in the closed state of the butterfly plate, the spacer ring is located between the high-pressure seal ring and the low-pressure seal ring, when the high-pressure seal ring leaks, the high-pressure seal ring is protected by the low-pressure seal ring, a double protection effect is achieved, and the sealing performance between the butterfly plate 2 and the valve body.

As a modified specific embodiment, referring to fig. 5, a wear-resistant member 17 is disposed on the valve seat 4 and abuts against the bipolar seal ring 16, the wear-resistant member 17 may be made of stellite, and the wear-resistant member 17 is designed to replace the friction between the valve seat 4 and the bipolar seal ring 16, so as to protect the valve seat 4.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a press from both sides cover butterfly valve convenient to maintain and the leakproofness is good, includes valve body (1), butterfly plate (2), valve rod (3) and disk seat (4), and lug fixed mounting through its back is on valve rod (3) butterfly plate (2), valve rod (3), valve body (1) and butterfly plate (2) adopt three eccentric center structure, and disk seat (4) are inconsistent with butterfly plate (2), its characterized in that: the steam-condensing valve is characterized in that the valve rod (3) penetrates through the valve body (1), an end cover (5) used for covering the bottom end of the valve rod (3) is arranged on the valve body (1), an air inlet hole (6) and a water outlet hole (7) which are used for communicating the interior of the valve body (1) with the outside are formed in the end cover (5), sealing elements (8) can be detachably connected with the air inlet hole (6) and the water outlet hole (7), steam is introduced into the valve body (1) through the air inlet hole (6), and water after the steam is condensed is discharged out of the valve body (1) through the water outlet hole;

the improved structure of the oil-gas seal valve is characterized in that a grease injection hole (9) and a grease injection valve (10) correspondingly connected with the grease injection hole (9) are formed in the valve body (1), the improved structure of the oil-gas seal valve further comprises a clamping sleeve (11), a seal packing (12) and a packing gland (13), the clamping sleeve (11) and the seal packing (12) are arranged on the outer side of the valve rod (3), the inner end of the clamping sleeve (11) corresponds to the grease injection hole (9), the outer end of the clamping sleeve (11) is attached to the seal packing (12), the seal packing (12) is located above the clamping sleeve (11) and attached to the packing gland (13), and the packing gland (13) is connected to the end portion, far away from the end cover (5).

2. The jacketed butterfly valve easy to maintain and good in sealing performance according to claim 1, wherein: the air inlet hole (6) is arranged close to the edge of the end cover (5), and the water outlet hole (7) is arranged in the center of the end cover (5).

3. The jacketed butterfly valve easy to maintain and good in sealing performance according to claim 1 or 2, wherein: a sealing ring (14) is arranged between the end cover (5) and the valve body (1), and the sealing ring (14) is not in contact with the valve rod (3).

4. The jacketed butterfly valve easy to maintain and good in sealing performance according to claim 1 or 2, wherein: the grease injection hole (9), the grease injection valve (10) and the clamping sleeve (11) are two, and the sealing filler (12) injected into the valve body (1) by the grease injection valve (10) at the lower part is positioned between the two clamping sleeves (11).

5. The jacketed butterfly valve easy to maintain and good in sealing performance according to claim 1 or 2, wherein: the butterfly plate (2) is provided with a plurality of criss-cross reinforcing ribs (15) on the end face deviating from the valve rod (3).

6. The jacketed butterfly valve easy to maintain and good in sealing performance according to claim 1 or 2, wherein: be provided with bipolar seal circle (16) on butterfly plate (2), bipolar seal circle (16) comprise high-pressure seal circle, spacer ring and low pressure sealing washer.

7. The jacketed butterfly valve easy to maintain and good in sealing performance according to claim 6, wherein: and a wear-resistant part (17) which is abutted against the bipolar sealing ring (16) is arranged on the valve seat (4).