CN215214944U - Double-layer sealing valve - Google Patents

Abstract

The utility model relates to a double-deck sealed valve, include the valve body through flange joint between two pipeline sections, the valve body bottom surface center of valve body is equipped with the screw rod, the backup pad has been cup jointed in the slip on the screw rod, the screw thread has cup jointed stop nut on the screw rod of backup pad below, the valve body all overlaps with the outside at the flange joint position of two pipeline sections and is equipped with sealed protection machanism, sealed protection machanism comprises two semi-circular snap rings that are relative setting from top to bottom, the snap ring that is located the top is the activity snap ring, the snap ring that is located the below links firmly with the backup pad top surface for deciding the snap ring and its outer bottom, it all offers flutedly on the inner ring of snap ring and activity snap ring to decide, the one end of activity snap ring is articulated with the fixed snap ring tip that corresponds, the other end passes through bolt assembly with the fixed snap ring tip that corresponds. The utility model discloses can strengthen the sealed protection of the flange joint department of valve under the prerequisite that does not influence the valve dismouting, form dual seal to the junction of flange and pipeline, guarantee the long-term stable use of valve.

Description

Double-layer sealing valve

Technical Field

The utility model belongs to the technical field of the valve, concretely relates to double-deck sealing valve.

Background

The valve is a control part in a fluid conveying system and has the functions of stopping, adjusting, guiding, preventing counter flow, stabilizing pressure, shunting or overflowing and relieving pressure and the like. Valves used in fluid control systems range in variety and size from the simplest shut-off valves to the variety of valves used in extremely complex autonomous systems.

At present, a conventional valve is generally installed in a pipeline in a flange connection mode, but most of the flange connection parts of the valve and the pipeline are directly exposed outside, in the long-term use process, the corrosion of external factors to the flange connection parts is serious, under the condition of not timely and frequent maintenance, the sealing of the flange connection parts is easy to lose efficacy so as to cause safety problems of leakage and the like, the long-term stable and safe work of the valve is not facilitated, and the improvement is needed.

SUMMERY OF THE UTILITY MODEL

In view of this, an object of the present invention is to provide a double-layer sealing valve, which can enhance the sealing protection at the flange connection portion of the valve without affecting the disassembly and assembly of the valve, and form double sealing at the connection portion between the flange and the pipeline, so as to solve the above-mentioned problems.

In order to achieve the above object, the utility model adopts the following technical scheme: a double-layer sealing valve comprises a valve body connected between two pipelines through flanges, wherein a screw rod is vertically and fixedly arranged at the center of the bottom surface of the valve body, a supporting plate is sleeved on the screw rod in a sliding mode up and down, a limiting nut is sleeved on the screw rod below the supporting plate in a threaded mode, a sealing protection mechanism is sleeved on the valve body and the outer portion of the flange connecting portion of each pipeline in a sleeved mode, the sealing protection mechanism comprises two semicircular clamping rings which are oppositely arranged up and down, the clamping ring positioned above is a movable clamping ring, the clamping ring positioned below is a fixed clamping ring, the outer bottom of the fixed clamping ring is fixedly connected with the top surface of the supporting plate, grooves matched with the corresponding flange connecting portions are formed in the inner rings of the fixed clamping ring and the movable clamping ring, the grooves of the fixed clamping ring and the movable clamping ring are oppositely arranged up and down, and the fixed clamping ring is clamped on the lower surface of the corresponding flange connecting portion through the grooves of the inner ring, the movable clamping ring is clamped on the upper surface of the corresponding flange connecting part through a groove on the inner ring of the movable clamping ring, one end of the movable clamping ring is hinged with the end part of the corresponding fixed clamping ring, and the other end of the movable clamping ring is bolted with the end part of the corresponding fixed clamping ring through a bolt assembly.

Preferably, a rotating handle is arranged on the outer side wall of the limiting nut.

Preferably, all be equipped with sealed the pad on the inner ring of deciding snap ring and activity snap ring and the cell wall of recess separately, the outside of deciding snap ring and activity snap ring all from interior to exterior wraps up in proper order and has strengthened anticorrosive coating and strengthen the inoxidizing coating.

Preferably, a protective barrel is arranged at the center of the top surface of the valve body, the valve cover and the handle of the valve body are both positioned in the protective barrel, the barrel wall of the protective barrel sequentially consists of a first anticorrosive coating, a second anticorrosive coating and an outer protective coating from inside to outside, and the top of the protective barrel is open and can be connected with the barrel cover in an opening and closing manner.

Preferably, strengthen the anticorrosive coating and make by polytetrafluoroethylene with first anticorrosive coating, the second anticorrosive coating is made by polyvinyl chloride, it is rubber shock pad to strengthen inoxidizing coating and outer inoxidizing coating, the cover is transparent ya keli board.

The utility model has the advantages that: the utility model relates to a rationally, moreover, the steam generator is simple in structure, the valve body is before the installation, earlier from the screw rod stop nut that screws down, and take off whole backup pad from the screw rod, then open two sets of sealed protection machanism's activity snap ring from the upset of the fixed snap ring that corresponds, install backup pad and stop nut back on the screw rod in proper order again, alright carry out follow-up operation, the length of screw rod can effectively be shortened in above-mentioned step, avoid sealed protection machanism directly to cause the problem of screw rod overlength because of needing certain space when the upset is opened on the screw rod of valve body below, alleviate the adverse effect to surrounding environment.

When the valve body is installed, the screw rod is arranged to facilitate the manual operation of the whole valve body by workers, the operation is convenient, and the efficiency and the quality of the positioning installation of the valve body are improved.

Valve body flange joint back in the pipeline, alright seal the protection operation to flange joint position, specifically do: the whole supporting plate is moved upwards firstly until the fixed clamping rings of the two sealing protection mechanisms are clamped on the lower surfaces of the corresponding flange connection parts. Then, the limiting nut is screwed towards the supporting plate until the supporting plate is locked and fixed. And then, turning over the movable clamping ring again to enable the movable clamping ring to be buckled and clamped on the upper surface of the corresponding flange connecting part, enabling the movable clamping ring to be abutted against the corresponding fixed clamping ring, and then bolting the free ends of the movable clamping ring and the fixed clamping ring through the bolt assembly. The sealing protection mechanism formed by butt joint of the movable clamp ring and the corresponding fixed clamp ring can perform another heavy sealing protection on the flange connecting part, can effectively avoid the problem that the flange connecting part is directly exposed outside and is easy to corrode, ensures that the sealing is effective for a long time, enables the valve body to be kept in a stable and safe working state for a long time under the double sealing of the flange connecting and sealing protection mechanism, and reduces the maintenance cost. In addition, when the valve body needs to be disassembled, only the bolt assembly needs to be taken down, the movable clamping ring is turned over, the sealing protection mechanism is opened, the limiting nut is unscrewed, the whole supporting plate is moved down, the flange connecting part can be exposed again, and the disassembling operation of the valve body is not influenced.

Drawings

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

fig. 2 is a schematic front view of the cross-sectional structure of the present invention;

fig. 3 is a schematic structural view of the valve body of the present invention when not connected to a pipeline;

fig. 4 is a schematic front view of the seal protection mechanism of the present invention when opened;

fig. 5 is a left side view schematic diagram of the seal protection mechanism of the present invention when closed;

fig. 6 is a schematic cross-sectional structure diagram of the protective cylinder of the present invention.

Reference numbers in the figures: 1 is the pipeline, 2 is the valve body, 3 is the screw rod, 4 is stop nut, 5 is the backup pad, 6 is flange joint position, 7 is sealed protection machanism, 8 is the activity snap ring, 9 is for deciding the snap ring, 10 is the recess, 11 is bolt assembly, 12 is the twist grip, 13 is sealed the pad, 14 is a protection section of thick bamboo, 15 is first anticorrosive coating, 16 is the second anticorrosive coating, 17 is outer inoxidizing coating, 18 is the cover.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments:

as shown in fig. 1 to 6, a double-layered sealing valve includes a valve body 2 connected between two pipes 1 by a flange. The valve body bottom surface center of valve body 2 is vertical to be set firmly screw rod 3, is the slip from top to bottom on screw rod 3 and has cup jointed backup pad 5, and the screw thread has cup jointed stop nut 4 on the screw rod 3 of backup pad below 5. The valve body 2 and the outside of the flange connection part 6 of the two pipelines 1 are all sleeved with a sealing protection mechanism 7. The sealing protection mechanism 7 is composed of two semicircular clamping rings which are arranged oppositely up and down, the clamping ring positioned above is a movable clamping ring 8, the clamping ring positioned below is a fixed clamping ring 9, and the outer bottom of the fixed clamping ring is fixedly connected with the top surface of the supporting plate 5. The inner rings of the fixed snap ring 9 and the movable snap ring 8 are provided with grooves 10 matched with the corresponding flange connecting parts 6, and the grooves 10 of the fixed snap ring and the movable snap ring are arranged up and down oppositely. The fixed snap ring 9 is clamped on the lower surface of the corresponding flange connecting part 6 through a groove 10 on the inner ring of the fixed snap ring, the movable snap ring 8 is clamped on the upper surface of the corresponding flange connecting part 6 through a groove 10 on the inner ring of the movable snap ring, one end of the movable snap ring 8 is hinged with the end part of the corresponding fixed snap ring 9, and the other end of the movable snap ring 8 is bolted with the end part of the corresponding fixed snap ring 9 through a bolt component 11;

before the installation, valve body 2 spins from screw rod 3 earlier down stop nut 4 to take off whole backup pad 5 from screw rod 3, then turn over the activity snap ring 8 of two sets of sealed protection machanism 7 from the fixed snap ring 9 that corresponds and open, install backup pad 5 and stop nut 4 back on screw rod 3 in proper order again, alright carry out follow-up operation, the length of screw rod 3 can effectively be shortened in the above-mentioned step, avoid sealed protection machanism 7 directly to turn over on screw rod 3 below valve body 2 and open the time problem that causes screw rod 3 overlength because of needing certain space, alleviate the adverse effect to the surrounding environment. When the valve body 2 is installed, the screw 3 is arranged, so that a worker can conveniently hold the whole valve body 2, the operation is convenient, and the efficiency and the quality of positioning and installing the valve body 2 can be improved;

2 flange joint of valve body is back in pipeline 1, alright seal the protection operation to flange joint position 6, specifically is: the whole supporting plate 5 is moved upwards firstly until the fixed snap rings 9 of the two sealing protection mechanisms 7 are clamped on the lower surfaces of the corresponding flange connecting parts 6. Then, the limiting nut 4 is screwed towards the supporting plate 5 until the supporting plate 5 is locked and fixed. And then, turning over the movable clamping ring 8 again to enable the movable clamping ring 8 to be buckled and clamped on the upper surface of the corresponding flange connecting part 6, enabling the movable clamping ring 8 to be abutted against the corresponding fixed clamping ring 9 relatively, and then bolting the free ends of the movable clamping ring 8 and the fixed clamping ring 9 through the bolt assembly 11. The sealing protection mechanism 7 formed by butt joint of the movable snap ring 8 and the corresponding fixed snap ring 9 can perform another heavy sealing protection on the flange connecting part 6, can effectively avoid the problem that the flange connecting part 6 is directly exposed outside and is easy to corrode, ensures that the sealing is effective for a long time, enables the valve body 2 to be kept in a stable and safe working state for a long time under the double sealing of the flange connecting and sealing protection mechanism, and reduces the maintenance cost. In addition, when valve body 2 was dismantled to needs, only need take off bolt assembly 11, upset activity snap ring 8 will seal protection machanism 7 and open, unscrew stop nut 4 again, move down whole backup pad 5, alright expose flange joint position 6 again, do not influence the dismantlement operation of valve body 2.

In this embodiment, the outer side wall of the limit nut 4 is provided with the rotating handle 12, so that the limit nut 4 can be controlled manually to rotate conveniently, an additional tool is not needed, and the operation is simpler and labor-saving.

In this embodiment, the sealing gaskets 13 are disposed on the inner rings of the fixed snap ring 9 and the movable snap ring 8 and on the groove walls of the respective grooves 10, so as to further enhance the sealing protection of the sealing protection mechanism 7 on the flange connection portion 6. The outer sides of the fixed snap ring 9 and the movable snap ring 8 are sequentially wrapped with a reinforced anticorrosive layer and a reinforced protective layer (not shown in the figure), so that the corrosion resistance and the buffering protective performance of the sealing protective mechanism 7 can be further enhanced, and the protection of the flange connecting part 6 is ensured to be more effective for a long time.

In this embodiment, the valve body top surface center of valve body 2 is equipped with a protection section of thick bamboo 14, and the valve gap and the handle of valve body 2 all are located a protection section of thick bamboo 14, can protect the essential element of valve body 2, are favorable to further improving the life of valve body 2 self. The wall of the protective cylinder 14 is sequentially composed of a first anticorrosive layer 15, a second anticorrosive layer 16 and an outer protective layer 17 from inside to outside, so that a heavy buffer protection and a double anticorrosive and corrosion-resistant protection can be formed, the corrosion damage of external factors to the valve body 2 is greatly reduced, the service life of the valve body 2 is prolonged, and the long-term stable operation work of the valve body 2 is facilitated. The top of the protective cylinder 14 is open and can be opened and closed to be connected with a cylinder cover 18, so that the valve body 2 can be conveniently controlled by opening the protective cylinder 14 without influencing the normal use of the valve body 2. The manner of openable and closable connection is the prior art, and is not limited herein.

In this embodiment, the reinforced anti-corrosion layer and the first anti-corrosion layer 15 are made of teflon, which has excellent chemical stability, corrosion resistance, sealing property, high lubrication non-stick property, electrical insulation property and good anti-aging endurance, and can effectively ensure the anti-corrosion and anti-corrosion properties of the sealing protection mechanism 7 and the protection cylinder 14. The second anticorrosive layer 16 is made of polyvinyl chloride, and has excellent weather resistance, stability and electrical insulation performance, so that the protection effect of the protection cylinder can be further ensured. The reinforced protective layer and the outer protective layer 17 are both rubber shock-absorbing pads, so that the buffer shock-absorbing and anti-collision performance of the sealing protective mechanism 7 and the protective barrel 14 can be effectively enhanced, and the respective protective action can be further enhanced. The cylinder cover 18 is a transparent acrylic plate, and has excellent weather resistance, acid and alkali resistance, strong impact resistance, long service life, good light transmission and more convenient use.

The utility model discloses a theory of operation: before the valve body 2 is installed, the lower limiting nut 4 is firstly screwed up from the screw rod 3, the whole supporting plate 5 is taken down from the screw rod 3, then the movable clamping rings 8 of the two groups of sealing protection mechanisms 7 are turned over and opened from the corresponding fixed clamping rings 9, and then the supporting plate 5 and the limiting nut 4 are sequentially installed back on the screw rod 3, so that subsequent operation can be carried out. When the valve body 2 is installed, the screw rod 3 is arranged to facilitate the worker to hold the whole valve body 2, so that the operation is convenient, and the efficiency and the quality of the positioning installation of the valve body 2 are improved. 2 flange joint of valve body is back in pipeline 1, alright seal the protection operation to flange joint position 6, specifically is: the whole supporting plate 5 is moved upwards firstly until the fixed snap rings 9 of the two sealing protection mechanisms 7 are clamped on the lower surfaces of the corresponding flange connecting parts 6. Then, the limiting nut 4 is screwed towards the supporting plate 5 until the supporting plate 5 is locked and fixed. And then, turning over the movable clamping ring 8 again to enable the movable clamping ring 8 to be buckled and clamped on the upper surface of the corresponding flange connecting part 6, enabling the movable clamping ring 8 to be abutted against the corresponding fixed clamping ring 9 relatively, and then bolting the free ends of the movable clamping ring 8 and the fixed clamping ring 9 through the bolt assembly 11. When valve body 2 is dismantled to needs, only need take off bolt assembly 11, upset activity snap ring 8 will seal protection machanism 7 and open, unscrew stop nut 4 again, move down whole backup pad 5, alright expose flange joint position 6 again, do not influence the dismantlement operation of valve body 2.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims (5)

1. A double-layer sealing valve comprises a valve body connected between two pipelines through flanges, and is characterized in that a screw rod is vertically and fixedly arranged at the center of the bottom surface of the valve body, a supporting plate is sleeved on the screw rod in a sliding manner up and down, a limiting nut is sleeved on the screw rod below the supporting plate in a threaded manner, a sealing protection mechanism is sleeved outside the flange connection part of the valve body and the two pipelines, the sealing protection mechanism consists of two semicircular clamping rings which are oppositely arranged up and down, the clamping ring positioned above is a movable clamping ring, the clamping ring positioned below is a fixed clamping ring, the outer bottom of the fixed clamping ring is fixedly connected with the top surface of the supporting plate, grooves matched with the corresponding flange connection parts are formed in the inner rings of the fixed clamping ring and the movable clamping ring, the grooves of the fixed clamping ring and the movable clamping ring are oppositely arranged up and down, and the fixed clamping ring is clamped on the lower surface of the corresponding flange connection part through the grooves in the inner rings, the movable clamping ring is clamped on the upper surface of the corresponding flange connecting part through a groove on the inner ring of the movable clamping ring, one end of the movable clamping ring is hinged with the end part of the corresponding fixed clamping ring, and the other end of the movable clamping ring is bolted with the end part of the corresponding fixed clamping ring through a bolt assembly.

2. The double-layer sealing valve according to claim 1, wherein a rotating handle is arranged on the outer side wall of the limiting nut.

3. The double-layer sealing valve according to claim 1, wherein the inner rings of the fixed snap ring and the movable snap ring and the groove walls of the grooves are provided with sealing gaskets, and the outer sides of the fixed snap ring and the movable snap ring are sequentially wrapped with a reinforced anti-corrosion layer and a reinforced protective layer from inside to outside.

4. The double-layer sealing valve according to claim 3, wherein a protection cylinder is arranged at the center of the top surface of the valve body, the valve cover and the handle of the valve body are both positioned in the protection cylinder, the cylinder wall of the protection cylinder sequentially comprises a first anticorrosive layer, a second anticorrosive layer and an outer protective layer from inside to outside, and the top of the protection cylinder is open and can be connected with the cylinder cover in an opening and closing manner.

5. The double-layer seal valve according to claim 4, wherein the reinforced anticorrosive layer and the first anticorrosive layer are both made of polytetrafluoroethylene, the second anticorrosive layer is made of polyvinyl chloride, the reinforced protective layer and the outer protective layer are both rubber shock-absorbing pads, and the cylinder cover is a transparent acrylic plate.

Images