阅读说明：本技术 一种用于油气回收的低温阀门 (Low-temperature valve for oil gas recovery ) 是由 祝迪刚 于 2020-07-17 设计创作，主要内容包括：本发明提出了一种用于油气回收的低温阀门,包括一阀杆腔,所述阀杆腔内包括阀杆和波纹管,所述阀杆和波纹管通过拧接和焊接的方式连接,所述波纹管与阀杆的连接处位于阀杆腔内,所述波纹管与阀杆连接的端部设置一外环,所述外环内套接一螺栓,所述螺栓的高度为外环高度的二倍,所述内环凸出于外环的部分与外环之间的夹角为直角,所述直角处设置一圈外坡面。本发明一种用于油气回收的低温阀门解决了低温阀门的阀杆在低温时收缩引起连接处的泄露的问题。(The invention provides a low-temperature valve for oil gas recovery, which comprises a valve rod cavity, wherein a valve rod and a corrugated pipe are arranged in the valve rod cavity, the valve rod and the corrugated pipe are connected in a screwing and welding mode, the joint of the corrugated pipe and the valve rod is positioned in the valve rod cavity, an outer ring is arranged at the end part of the corrugated pipe connected with the valve rod, a bolt is sleeved in the outer ring, the height of the bolt is twice of that of the outer ring, the included angle between the part of the inner ring protruding out of the outer ring and the outer ring is a right angle, and a circle of outer slope surface is arranged at the right angle. The low-temperature valve for oil gas recovery solves the problem that the valve rod of the low-temperature valve shrinks at low temperature to cause leakage at the joint.)

1. The low-temperature valve for oil gas recovery is characterized by comprising a valve rod cavity, wherein a valve rod and a corrugated pipe are arranged in the valve rod cavity, the valve rod and the corrugated pipe are connected in a screwing and welding mode, the joint of the corrugated pipe and the valve rod is located in the valve rod cavity, an outer ring is arranged at the end part of the corrugated pipe connected with the valve rod, a bolt is sleeved in the outer ring, the height of the bolt is twice of that of the outer ring, an included angle between the part of the inner ring protruding out of the outer ring and the outer ring is a right angle, and a circle of outer slope surface is arranged at the right angle.

2. The low-temperature valve for oil and gas recovery as claimed in claim 1, wherein one surface of the outer ring and the bottom surface of the inner ring are located on the same plane, the plane is connected with the bellows, and one surface of the bolt far away from the outer ring is connected with the valve rod.

3. The low-temperature valve for oil and gas recovery as claimed in claim 2, wherein the inner wall of the bolt is provided with threads, the inner wall of the outer ring is provided with threads, the part of the outer wall of the bolt, which is in contact with the outer ring, is provided with threads, and the outer ring is screwed and fixed with the bolt.

4. The cryogenic valve for oil and gas recovery of claim 3, wherein the distance between the connecting member and the upper cover of the stem chamber is one quarter of the height of the stem chamber.

5. The low-temperature valve for oil and gas recovery of claim 4, wherein an included angle between a part of the bolt protruding out of the outer ring and the outer ring is a right angle, the right angle is connected through welding, a welding point forms an outer slope at the right angle, the outer slope tightly connects the outer ring and the bolt, and the included angle between the outer slope and the outer ring and the included angle between the outer slope and the bolt are 45 degrees.

6. The low-temperature valve for oil and gas recovery as claimed in claim 5, wherein an inner slope is arranged at one end of the bolt and the valve rod, the inner slope is inclined inward by 45 degrees from the outer wall of one end of the bolt close to the valve rod, a groove is formed between the inner slope and the valve rod, welding materials are filled in the groove, and the bolt and the valve rod are further connected in a welding manner.

7. The low-temperature valve for oil and gas recovery of claim 1, wherein a valve core is arranged in the bellows, one end of the valve core is connected with the valve rod, the other end of the valve core is positioned outside the bellows, a valve seat is further arranged in the low-temperature valve, the valve seat is positioned at one end of the valve core far away from the bellows, the valve core can move up and down, and the valve core and the valve rod are screwed through bolts.

8. The low-temperature valve for oil and gas recovery as claimed in claim 7, wherein the valve seat is a build-up hard alloy valve seat, and the valve core is a reinforced PTFE valve core.

Technical Field

The invention belongs to the technical field of valves, and particularly relates to a low-temperature valve for oil gas recovery.

Background

Along with the attention to the environmental protection, oil gas recovery has played a great role to the environmental protection, can retrieve automobile exhaust through adsorption equipment, and then carry and refine into oil. The adsorption device is internally provided with a low-temperature valve usually, materials such as Freon and the like are arranged in the low-temperature valve, the temperature in the valve is lower, and due to expansion with heat and contraction with cold, the valve rod of the low-temperature valve contracts to cause the leakage of the joint when the temperature is low, thereby causing adverse effects on industrial production.

Disclosure of Invention

The invention provides a low-temperature valve for oil gas recovery, which solves the problem that a valve rod of the low-temperature valve shrinks at low temperature to cause leakage at a joint.

The invention provides a low-temperature valve for oil gas recovery, which comprises a valve rod cavity, wherein a valve rod and a corrugated pipe are arranged in the valve rod cavity, the valve rod and the corrugated pipe are connected in a screwing and welding mode, the joint of the corrugated pipe and the valve rod is positioned in the valve rod cavity, an outer ring is arranged at the end part of the corrugated pipe connected with the valve rod, a bolt is sleeved in the outer ring, the height of the bolt is twice of the height of the outer ring, the included angle between the part of the inner ring protruding out of the outer ring and the outer ring is a right angle, and a circle of outer slope surface is arranged at the right angle.

Preferably, one surface of the outer ring and the bottom surface of the inner ring are located on the same plane, the plane is connected with the corrugated pipe, and one surface of the bolt, which is far away from the outer ring, is connected with the valve rod.

Preferably, the inner wall of the bolt is provided with threads, the inner wall of the outer ring is provided with threads, the part of the outer wall of the bolt, which is in contact with the outer ring, is provided with threads, and the outer ring is screwed and fixed with the bolt.

Preferably, the distance between the connecting part and the upper cover of the valve rod cavity is one fourth of the height of the valve rod cavity.

Preferably, the part of the bolt protruding out of the outer ring and the included angle between the outer ring are right angles, the right angles are connected through welding, the welding point forms an outer slope surface at the right angle, the outer slope surface tightly connects the outer ring and the bolt, and the included angle between the outer slope surface and the outer ring and the included angle between the outer slope surface and the bolt are 45 degrees. Preferably, the bolt is provided with an inner slope surface with one end of the valve rod, the inner slope surface is inwards inclined by 45 degrees by the outer wall of the end, close to the valve rod, of the bolt, a groove body is formed between the inner slope surface and the valve rod, welding materials are filled in the groove body, and the bolt is further connected with the valve rod in a welding mode. Preferably, the corrugations

The valve core is arranged in the pipe, one end of the valve core is connected with the valve rod, the other end of the valve core is positioned outside the corrugated pipe, the low-temperature valve is further internally provided with a valve seat, the valve seat is positioned at one end of the valve core far away from the corrugated pipe, the valve core can move up and down, and the valve core is screwed with the valve rod through a bolt.

Preferably, the valve seat is a surfacing hard alloy valve seat, and the valve core is a reinforced PTFE valve core.

Compared with the prior art, through set up the bellows in a low temperature valve for vapor recovery system, valve rod and bellows are connected through twisting the mode of connecing and welding, the bellows is located the valve rod intracavity with the junction of valve rod, the tip that bellows and valve rod are connected sets up an outer loop, the height of outer loop is twice for the inner ring, the contained angle of inner ring protrusion between the part of outer loop and outer loop is the right angle, the outer domatic of right angle department welding can prevent that the valve rod shrink of low temperature valve from arousing revealing of junction when the low temperature.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic diagram of a cryogenic valve for oil and gas recovery according to the present invention;

FIG. 2 is a schematic structural diagram of a bellows in a cryogenic valve for oil and gas recovery according to the present invention;

fig. 3 is a schematic structural diagram of a joint between a corrugated pipe and a valve of a low-temperature valve for oil and gas recovery according to the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 and 2, the cryogenic valve for oil and gas recovery according to the present invention comprises a valve stem cavity 1, a valve stem 11 and a bellows 12 are included in the valve stem cavity 11, the bellows 12 is connected with the valve stem 11 by screwing and welding, and the joint of the bellows 12 and the valve stem 11 is located in the valve stem cavity 11.

An outer ring 142 is arranged at the end part of the corrugated pipe 12 connected with the valve rod 11, a bolt 141 is sleeved in the outer ring 142, the height of the bolt 141 is twice of the height of the outer ring 142, when the corrugated pipe 12 is connected with the valve rod 11, one surface of the outer ring 142 and the bottom surface of the bolt 141 are located on the same plane, the plane is connected with the corrugated pipe 12, and one surface of the bolt 141 far away from the outer ring 142 is connected with the valve rod 11. Set up the case in the bellows 12, the one end of case with outside the valve rod 11 is connected, the other end is located bellows 12, further sets up a disk seat in the low temperature valve, the disk seat is located the one end position department that bellows 12 was kept away from to the case, the case can reciprocate, the case with valve rod 11 connects through bolt 141 twists, the disk seat adopts build-up welding carbide to handle, and the case adopts soft materials preparation, mainly for reinforcing PTFE material (PTFE is a thermoplastic polymer, polytetrafluoroethylene), adopts plane seal, and sealing performance is good when two designs make the valve close, has avoided the possibility of leaking in the medium, and life is 5 times that the line type of conventional 30 degrees angles is sealed.

As shown in fig. 2, the outer ring 142 is connected to one end of the bellows 12, and the inner wall of the bolt 141 is threaded so that the inner ring 141 can be screwed with the valve stem 11. The included angle between the part of the bolt 141 protruding out of the outer ring 142 and the outer ring 142 is a right angle, the right angle is connected by welding, a welding point forms an outer slope 143 at the right angle, the outer slope 143 tightly connects the outer ring 142 with the bolt 141, the included angle between the outer slope 143 and the outer ring 142 and the included angle between the outer slope 143 and the bolt 141 are 45 degrees, and the outer slope 143 of 45 degrees is formed by welding, so that the bolt 141 and the outer ring 142 are more tightly connected, when the joint of the bolt 141 and the outer ring 142 is loosened, because two right-angle sides of the outer slope 143 of 45 degrees are equal in length, the contact parts of the bolt 141 and the outer ring 142 with the outer slope 143 bear force closely, and the connection between the bolt 141 and the outer ring 142 is more stable. In this embodiment, the distance between the connecting part 14 and the upper cover 111 of the valve stem cavity 11 is a quarter of the height of the valve stem cavity 11, so that the bellows 12 can move slightly to avoid leakage when the cryovalve 1 is frozen.

As shown in fig. 3, the inner wall of the outer ring 142 is provided with threads, the portion of the outer wall of the bolt 141 contacting the outer ring 142 is provided with threads, and the outer ring 142 is screwed and fixed with the bolt 141. An inner slope 140 is arranged at one end of the bolt 141 and one end of the valve rod 11, the inner slope 140 is inclined inward by 45 degrees from the outer wall of the end, close to the valve rod 11, of the bolt 141, a groove body is formed between the inner slope 140 and the valve rod 11, welding materials are filled in the groove body, and the bolt 141 and the valve rod 11 are further connected in a more fastening mode through welding. Compared with the prior art, through set up the bellows in a low temperature valve for vapor recovery system, valve rod and bellows are connected through twisting the mode of connecing and welding, the bellows is located the valve rod intracavity with the junction of valve rod, the tip that bellows and valve rod are connected sets up an outer loop, the height of outer loop is twice for the inner ring, the contained angle of inner ring protrusion between the part of outer loop and outer loop is the right angle, the outer domatic of right angle department welding can prevent that the valve rod shrink of low temperature valve from arousing revealing of junction when the low temperature.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.