阅读说明：本技术 保护套及闸阀 (Protective sleeve and gate valve ) 是由 金子涵 王宏 曹鹏 廉凌峰 郑欣 袁梓钧 于小童 袁欢 陈浩 陈杨磊 刘昱成 于 2018-07-05 设计创作，主要内容包括：本发明提供一种保护套及闸阀,该保护套包括：本体；本体的底端设置有安装口,安装口向内部延伸形成容纳腔,容纳腔用于容置阀杆；以使手轮外部的阀杆容置在容纳腔内,本体可以阻止外界的灰尘或则砂石与阀杆接触,进而避免阀杆上的驱动外螺纹上附着尘土或者砂石,导致的驱动外螺纹或者驱动螺纹孔损伤,延长了的阀门的使用寿命。(The invention provides a protective sleeve and a gate valve, wherein the protective sleeve comprises: a body; the bottom end of the body is provided with a mounting opening, the mounting opening extends inwards to form an accommodating cavity, and the accommodating cavity is used for accommodating the valve rod; so that the outside valve rod holding of hand wheel is holding the intracavity, the body can prevent external dust or then grit and valve rod contact, and then attached to dust or grit on the drive external screw thread of avoiding on the valve rod, the drive external screw thread or the drive screw hole damage that lead to have prolonged the life of valve.)

1. A protective casing, comprising: a body; the bottom of body is provided with the installing port, the installing port extends to inside and forms and holds the chamber, it is used for the holding valve rod to hold the chamber.

2. The protective cover of claim 1, wherein the bottom end of the body is provided with a sealing ring for connection with a seal on a handwheel.

3. The protective casing of claim 2, wherein the sealing ring is a rubber ring.

4. The protective cover of claim 2, further comprising a first valve; a first opening is formed in the body and communicated with the accommodating cavity, and the first valve is arranged in the first opening.

5. The protective casing of claim 4, wherein the first valve is a one-way valve.

6. The protective sheath of claim 4, further comprising a second valve, wherein the body defines a second opening, the second opening being spaced from the first opening; the second valve is disposed within the second opening; the second valve is used for being communicated with an air source so as to inject protective air into the accommodating cavity.

7. The protective casing of claim 6, wherein the second valve is a one-way valve.

8. The protective cover of claim 6, wherein the second opening is disposed on a sidewall of the body and the first opening is disposed at a top end of the body.

9. The protective case of claim 6, wherein a connecting tube is disposed outside the second opening, and the connecting tube is in communication with the air source.

10. A valve, comprising: a valve stem, a handwheel, and a protective sleeve according to any of claims 1-9; a driving external thread is arranged on the valve rod, and a driving threaded hole matched with the driving external thread is arranged on the hand wheel; part the valve rod is stretched out by the drive screw hole, the protective sheath cover is established by stretch out in the drive screw hole on the valve rod.

Technical Field

The invention relates to the technical field of valves, in particular to a protective sleeve and a gate valve.

Background

In the oil and gas exploitation process, oil and gas in an oil and gas well are conveyed to a storage device or a combined station through a pipeline; therefore, how to control the on-off of the pipeline becomes the key for safe operation of the process.

Disclosure of Invention

In view of this, the invention provides a protective sleeve and a gate valve, so as to solve the technical problems that external dust or sand is easily attached to the driving external thread, and the driving external thread or the driving threaded hole is easily damaged when the hand wheel is rotated, thereby reducing the service life of the valve.

The invention provides a protective sleeve, which is characterized by comprising: a body; the bottom of body is provided with the installing port, the installing port extends to inside and forms and holds the chamber, it is used for the holding valve rod to hold the chamber.

In the protective sleeve, a sealing ring is preferably arranged at the bottom end of the body, and the sealing ring is used for being connected with a sealing part on a hand wheel.

The protective sleeve is preferably a rubber ring.

The protective sheath as described above, preferably further comprising a first valve; a first opening is formed in the body and communicated with the accommodating cavity, and the first valve is arranged in the first opening.

The protective sleeve as described above, preferably, the first valve is a one-way valve.

The protective sleeve as described above, preferably, the protective sleeve further includes a second valve, the body is provided with a second opening, and the second opening and the first opening are arranged at an interval; the second valve is disposed within the second opening; the second valve is used for being communicated with an air source so as to inject protective air into the accommodating cavity.

The protective sleeve as described above, preferably, the second valve is a one-way valve.

In the protective sheath, the second opening is preferably disposed on a sidewall of the body, and the first opening is disposed at a top end of the body.

In the protective sleeve, preferably, a connecting pipe is arranged outside the second opening, and the connecting pipe is communicated with the air source.

The present invention also provides a valve comprising: a valve stem, a handwheel, and a protective sleeve as described above; a driving external thread is arranged on the valve rod, and a driving threaded hole matched with the driving external thread is arranged on the hand wheel; part the valve rod is stretched out by the drive screw hole, the protective sheath cover is established by stretch out in the drive screw hole on the valve rod.

According to the protective sleeve and the gate valve provided by the invention, the mounting opening is formed in the bottom end of the body, the mounting opening extends inwards to form the accommodating cavity, the body is sleeved on the valve rod outside the hand wheel, so that the valve rod outside the hand wheel is accommodated in the accommodating cavity, the body can prevent external dust or sand from contacting with the valve rod, further, the damage of the driving external thread or the driving threaded hole due to the fact that the dust or the sand is attached to the external thread on the valve rod is avoided, and the service life of the valve is prolonged.

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 some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.

FIG. 1 is a schematic diagram of a prior art valve;

FIG. 2 is a schematic structural view of a protective cover according to an embodiment of the present invention;

FIG. 3 is a schematic structural view of a protective cover according to another embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a valve provided in the practice of the present invention;

FIG. 5 is an enlarged view of a portion of FIG. 4 at A;

FIG. 6 is a schematic view of the interior of a protective casing provided in the practice of the present invention.

10. A body;

20. a valve seat;

30. a valve stem;

40. a hand wheel;

50. a valve cover;

101. an installation port;

102. a first valve;

103. a second valve;

104. a seal ring;

301. driving the external thread;

401. and a sealing part.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. 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.

FIG. 2 is a schematic structural view of a protective cover according to an embodiment of the present invention; FIG. 3 is a schematic structural view of a protective cover according to another embodiment of the present invention; FIG. 4 is a schematic structural diagram of a valve provided in the practice of the present invention; FIG. 5 is an enlarged view of a portion of FIG. 4 at A; FIG. 6 is a schematic view of the interior of a protective casing provided in the practice of the present invention.

Reference is made to fig. 1-5. This embodiment provides a protective sheath, includes: a body 10; the bottom of body 10 is provided with installing port 101, and installing port 101 extends to inside and forms and holds the chamber, holds the chamber and is used for holding valve rod 30.

Specifically, the valve includes: a valve plate, a valve seat 20, a valve cover 50, a valve rod 30 and a hand wheel 40; a valve cavity is arranged in the valve seat 20, the valve cavity extends towards two ends of the valve seat 20 and is provided with an oil inlet and an oil outlet, a connecting part is arranged on the valve seat 20, a telescopic hole penetrating through the valve cavity is formed in the connecting part, and the valve plate extends into the valve cavity from the telescopic hole to seal the valve cavity so as to close the valve; the valve cover 50 covers the outer side of the telescopic hole to seal the telescopic hole; a through hole is formed in the valve cover 50, the bottom end of the valve rod 30 penetrates through the telescopic hole and then is connected with the valve plate in the valve cavity, an installation frame extending to one side away from the valve seat 20 is arranged on the valve cover 50, a shaft hole is formed in the top end of the installation frame, and the valve rod 30 penetrates through the shaft hole; the valve rod 30 comprises a first section close to the top end and a second section far away from the top end, and the side wall of the first section is provided with a driving external thread 301; a driving threaded hole matched with the driving external thread 301 is formed in the hand wheel 40, the top end of the valve rod 30 penetrates into the driving threaded hole after penetrating through the shaft hole, and the hand wheel 40 abuts against the top end of the mounting frame towards the bottom end of the valve seat 20; when the hand wheel 40 is twisted in the opposite direction of the preset direction, the driving valve rod 30 moves in the direction away from the valve cavity, and the valve plate is driven to move in the telescopic hole, so that the valve cavity is communicated, and the valve is opened; the valve can be judged to be opened or closed by observing the length of the valve rod 30 outside the hand wheel 40, and the opening degree of the valve can also be judged.

Specifically, the material of the body 10 in this embodiment may be various, as long as it can prevent external dust or sand from contacting the driving external thread 301 on the valve rod 30; for example: the main body 10 may be mainly made of metal materials such as copper, iron, aluminum, etc., and at this time, the outer surface of the main body 10 needs to be coated with anti-rust paint, so as to prevent the main body 10 from being directly exposed to the air, which causes the main body 10 to be easily rusted; or the body 10 is mainly made of plastic; the present embodiment preferably the body 10 is constructed of rubber.

Preferably, an observation window is formed in the body 10 from the bottom end to the top end, a transparent sheet made of a transparent material is arranged in the observation window, and the observation window is closed by the transparent sheet, so that an operator can observe the position of the valve rod 30 in the accommodating cavity through the transparent sheet to determine whether the valve is in an opening state or a closing state. Further, the transparent sheet may be formed of a transparent plastic sheet or a glass sheet, and the transparent sheet may be connected to the side wall of the observation window by an adhesive glue. Further preferably, when the body 10 is made of plastic or rubber, transparent rubber or plastic can be selected, and in this case, the position of the valve rod 30 in the accommodating cavity can be directly observed through the side wall of the body 10 without providing an observation window.

The shape of the body 10 in this embodiment may be various, for example: the body 10 may be cylindrical, and at this time, a bottom surface of the cylinder is provided with a mounting opening 101, and the mounting opening 101 extends inwards to form an accommodating cavity; or the body 10 is in a column shape with a cross section in a regular shape such as a rectangle, a triangle, etc., of course, the cross section of the body 10 in the column shape can also be in other irregular shapes; the body 10 may also take on other irregular shapes.

The shape of the receiving chamber may be various as long as it can receive the valve stem 30; for example: the containing cavity can be cylindrical or prismatic, and the cross section of the cylindrical containing cavity can also be in other shapes; in addition, the accommodating cavity can also be in other irregular shapes.

It should be noted that, the reasonable distance from the top end to the bottom end of the body 10 and the size of the accommodating cavity are set, so that when the valve is in an open state, that is, when the length of the valve rod 30 extending from the driving threaded hole is the longest, the valve rod 30 located outside the hand wheel 40 can be completely accommodated in the accommodating cavity.

The use of the protective sheath that this embodiment provided does: the mounting opening 101 is aligned to the top end of the valve rod 30, then the valve rod 30 extends into the mounting opening 101, and the valve rod 30 outside the hand wheel 40 is completely arranged in the accommodating cavity in a penetrating mode, so that the protective sleeve is mounted. When the hand wheel 40 needs to be twisted to switch from the opening state of the valve opening to the closing state of the valve closing, the valve rod 30 moves into the valve cavity, so that the length of the valve rod 30 positioned outside the hand wheel 40 is reduced, at the moment, the bottom end of the body 10 is abutted against the hand wheel 40, and further, the top end of the valve rod 30 gradually moves towards the outside of the accommodating cavity; when the valve is switched from the closed state to the open state by twisting the hand wheel 40, the valve rod 30 moves in the direction away from the valve cavity, so that the length of the valve rod 30 positioned outside the hand wheel 40 is increased, at the moment, the valve rod 30 drives the body 10 to move in the direction away from the hand wheel 40, and after the valve is opened, the body 10 is pushed towards the hand wheel 40, so that the valve rod 30 outside the hand wheel 40 is completely accommodated in the accommodating cavity.

The protective sheath that this embodiment provided, bottom through at body 10 sets up installing port 101, installing port 101 extends to inside and forms and hold the chamber, establish body 10 cover on the outside valve rod 30 of hand wheel 40, so that the outside valve rod 30 holding of hand wheel 40 is holding the intracavity, body 10 can prevent external dust or then grit and valve rod 30 contact, and then attached to dust or grit on the drive external screw thread 301 on avoiding valve rod 30, the damage of drive external screw thread 301 or the drive screw hole that leads to, the life of the valve that has prolonged.

With continued reference to fig. 3 and 5. Specifically, the bottom end of the body 10 is provided with a sealing ring 104, and the sealing ring 104 is used for connecting with a sealing part 401 on the handwheel 40. Sealing between the accommodating cavity and the hand wheel 40 is realized, so that outside air is prevented from entering the accommodating cavity, and the valve rod 30 in the accommodating cavity is prevented from being corroded; in addition, the bottom end of the body 10 is connected with the hand wheel 40, so that the body 10 cannot be driven to move in the moving process of the valve rod 30, and the problem that the body 10 is required to be pushed to the hand wheel 40 after the valve is opened so that the valve rod 30 is completely accommodated in the accommodating cavity and the operation is complex is avoided.

It should be noted that, the sealing means is required to ensure the sealing performance between the driving external thread 301 and the driving threaded hole, so as to prevent air from entering the accommodating cavity through the driving threaded hole.

Preferably, the sealing ring 104 may be a metal ring made of a metal material such as copper, iron, and aluminum, or the sealing ring 104 is a non-metal ring made of a non-metal material such as plastic; in this embodiment, the sealing ring 104 is preferably a rubber ring, and the sealing performance between the sealing ring 104 and the sealing portion 401 can be further enhanced by using the rubber ring.

Specifically, the sealing portion 401 is disposed on a side of the hand wheel 40 away from the valve seat 20, the sealing portion 401 may be connected to the hand wheel 40 by welding or bolting, or the sealing portion 401 is integrally formed with the hand wheel 40 by casting;

it should be noted that the sealing portion 401 needs to have a cylindrical surface that matches with the sealing ring 104, so as to ensure that the sealing ring 104 can be sleeved on the cylindrical surface, and further ensure the sealing performance between the sealing ring 104 and the sealing portion 401. Preferably, the sealing ring 104 may be connected to the bottom end of the body 10 by an adhesive, or the sealing ring 104 is integrally formed with the body 10; further, the inner diameter of the seal ring 104 is slightly smaller than the outer diameter of the cylindrical surface, so that the seal ring 104 and the seal portion 401 are in interference fit, and the sealing property between the seal ring 104 and the seal portion 401 is further improved.

Preferably, a sealing ring is arranged inside the sealing ring 104, the sealing ring is a metal ring, an adjusting opening is formed in the sealing ring, the inner diameter of the sealing ring is smaller than the outer diameter of the sealing portion 401, the sealing ring elastically deforms when the sealing portion 401 penetrates through the sealing ring, so that the adjusting opening is enlarged, and at the moment, under the action of elastic force of the sealing ring, the inner wall of the sealing ring 104 presses the sealing portion 401, so that the sealing performance between the sealing ring 104 and the sealing portion 401 is further improved.

In other embodiments, the accommodating cavity is cylindrical, an annular groove is formed in the side wall of the accommodating cavity close to the mounting opening 101, the sealing ring 104 is arranged in the annular groove, the valve rod 30 is arranged in the accommodating cavity in a penetrating manner, and the sealing ring 104 is connected with the sealing part 401 on the hand wheel 40.

With continued reference to fig. 2 and 5. Specifically, the protective sleeve further comprises a first valve 102; a first opening is formed in the body 10 and communicated with the accommodating cavity, and the valve is arranged in the first opening. After the body 10 is sleeved on the outside of the valve rod 30, the air in the accommodating cavity can be pumped out through the first valve 102, so as to prevent the air in the accommodating cavity from corroding the valve rod 30.

Preferably, the first valve 102 may be a ball valve or other valve; when the air pump is used, the air inlet of the air pump can be communicated with the first valve 102, and then the first valve 102 is opened, so that the air pump works, and the air pump pumps out the air in the accommodating cavity; then the first valve 102 is closed, and the air pump is controlled to stop working.

Preferably, the first valve 102 is a one-way valve. The opening or closing of the first valve 102 does not need to be controlled manually, and the operation process is simplified. When the air pressure in the accommodating cavity is lower than the external air pressure, the one-way valve is automatically opened so that the air in the accommodating cavity flows out through the one-way valve; on the contrary, when the external air pressure is larger than or equal to the air pressure in the accommodating cavity, the one-way valve is automatically closed.

With continued reference to fig. 3 and 6. Specifically, the protective sleeve further comprises a second valve 103, a second opening is formed in the body 10, and the second opening and the first opening are arranged at intervals; the second valve 103 is disposed within the second opening; the second valve 103 is used for communicating with a gas source to inject the shielding gas into the accommodating cavity. The gas source injects the shielding gas into the accommodating cavity through the second valve 103, and at the same time, the gas in the accommodating cavity is exhausted through the first valve 102, and the shielding gas can replace the air in the accommodating cavity so as to prevent the air from corroding the valve rod 30.

Preferably, the shielding gas may be nitrogen, inert gas, or the like, which does not corrode the valve rod 30, and the gas source may be a gas storage tank storing the shielding gas, which is communicated with the second valve 103.

Preferably, the second valve 103 may be a ball valve; when in use, the gas source can be communicated with the second valve 103, and then the second valve 103 is opened, so that the protective gas enters the accommodating cavity, and the gas in the accommodating cavity is discharged from the first valve 102; after which the second valve 103 is closed.

Preferably, the second valve 103 is a one-way valve. The opening or closing of the second valve 103 does not need to be controlled manually, and the operation process is simplified. When the air source is connected with the second valve 103, the one-way valve is automatically opened by the air pressure of the air pressure air source in the accommodating cavity, so that the protective air in the air source enters the accommodating cavity through the second valve 103; conversely, when the air source is disconnected from the second valve 103, the air pressure in the accommodating cavity is greater than or equal to the external atmospheric pressure, and the one-way valve is automatically closed at the moment.

With continued reference to fig. 3 and 6. Specifically, the second opening is provided on the side wall of the body 10, and the first opening is provided at the top end of the body 10. So that the air in the accommodating chamber is completely exhausted through the first valve 102 while the shielding gas is injected; so as to prevent the shielding gas entering from the second opening from directly flowing out through the first opening due to the close distance between the first opening and the second opening, and thus, the air in the containing cavity is partially remained.

Preferably, a connecting pipe is arranged outside the second opening and is communicated with an air source. Is communicated with an air source through a connecting pipe, and is convenient to connect.

Specifically, the installation process of the protective sheath that this embodiment provided is: the mounting opening 101 is aligned with the top end of the valve rod 30, and then the valve rod 30 is inserted into the mounting opening 101, and the sealing ring 104 is sleeved on the sealing part 401 of the handwheel 40. Then communicating the gas source with the connecting pipe so as to enable the gas source to convey protective gas into the accommodating cavity; at the moment, a second one-way valve arranged at the second opening is opened, and the shielding gas enters the accommodating cavity through the second one-way valve; the air pressure in the accommodating cavity is increased, and the first check valve arranged at the first opening is opened, so that the air and part of the protective air in the accommodating cavity flow out through the first check valve; the air source continuously conveys the protective gas into the accommodating cavity until the air in the accommodating cavity is completely exhausted, then the air source is closed, the second one-way valve is closed, however, the air pressure in the accommodating cavity is still higher than the external atmospheric pressure, and the protective gas in the accommodating cavity continuously flows out through the first one-way valve; when the air pressure in the accommodating cavity is smaller than the opening pressure of the first one-way valve, the first one-way valve is closed; the receiving chamber is now filled with a shielding gas to prevent corrosion of the valve stem 30.

When the hand wheel 40 needs to be twisted to switch from the opening state to the closing state, the valve rod 30 moves into the valve cavity, so that the length of the valve rod 30 positioned outside the hand wheel 40 is reduced, the air pressure in the accommodating cavity is reduced, and the second one-way valve is opened to enable air to enter the accommodating cavity; at the moment, protective gas is conveyed into the accommodating cavity again through the gas source so as to exhaust the air in the accommodating cavity. When the hand wheel 40 is twisted to switch the valve from the closed state to the open state, the valve rod 30 moves back to the direction away from the valve cavity, so that the length of the valve rod 30 positioned outside the hand wheel 40 is increased, the gas in the accommodating cavity is raised, and the protective gas in the accommodating cavity flows out of the first one-way valve.

In other embodiments, the first valve 102 and the second valve 103 may both be breather valves; so as to ensure that a certain air pressure exists in the accommodating cavity.

With continued reference to fig. 4 and 5, in other embodiments there is also provided a valve comprising: valve stem 30, hand wheel 40 and a protective sleeve as described above; a driving external thread 301 is arranged on the valve rod 30, and a driving threaded hole matched with the driving external thread 301 is arranged on the hand wheel 40; part of the valve rod 30 extends from the driving threaded hole, and the protective sleeve is sleeved on the valve rod 30 extending from the driving threaded hole. The protective sleeve can protect the external thread extending from the drive threaded hole from dust or sand adhering to the external thread and then damaging the drive external thread 301 or the drive internal thread when the hand wheel 40 is twisted.

In the present invention, unless otherwise specifically stated, the terms "mounted," "connected," "fixed," and the like are to be understood broadly, and for example, may be fixedly connected, detachably connected, or integrally formed, mechanically connected, electrically connected, or communicable with each other; they may be directly connected or indirectly connected through an intermediate medium, or they may be connected internally or in any other manner known to those skilled in the art, unless otherwise specifically limited. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.