CN113187919B

CN113187919B - Thermal recovery well head gate valve

Info

Publication number: CN113187919B
Application number: CN202110723474.9A
Authority: CN
Inventors: 唐凤芹; 刘智峰
Original assignee: Shengli Oilfield Sea Petroleum Machinery Manufacture Co ltd
Current assignee: Shengli Oilfield Sea Petroleum Machinery Manufacture Co ltd
Priority date: 2021-06-29
Filing date: 2021-06-29
Publication date: 2021-09-03
Anticipated expiration: 2041-06-29
Also published as: CN113187919A

Abstract

The invention relates to a gate valve, in particular to a thermal recovery wellhead gate valve. The invention aims to provide a thermal recovery wellhead gate valve which can prevent liquid from flowing out and can be sealed in multiple ways. The technical scheme is as follows: the utility model provides a thermal recovery well head gate valve, including first casing, carry the casing, the second casing, the third casing, the fourth casing, external screw thread pole and carousel, first casing, a cavity that holds seal assembly is constituteed to second casing and third casing, wherein the second casing is located between first casing and the third casing, the top intercommunication of third casing has the fourth casing, the both sides of first casing all communicate has the transport casing, open on the interior cavity upper portion of fourth casing has the sliding tray, the internal screw thread pole is installed in the internal rotation of fourth casing, the upper end of external screw thread pole is provided with the carousel. The sealing assembly is matched with the inner cavity of the first shell in shape, so that the equipment can be sealed, and the liquid in the first shell can be prevented from flowing out to cause obstruction.

Description

Thermal recovery well head gate valve

Technical Field

The invention relates to a gate valve, in particular to a thermal recovery wellhead gate valve.

Background

Thermal recovery refers to the process of heating crude oil from an oil reservoir which is difficult to recover under normal underground conditions by an artificial heating method, so that the recovery rate is improved.

Present thermal recovery well head gate valve seals it through the flashboard more, present gate valve is in the use, the gyration that relies on valve-stem nut drives valve rod up-and-down motion, realize opening and closing of flashboard, and the wearing and tearing can appear in the flashboard up-and-down motion number of times too much, and the in-process of the flashboard up-and-down motion of present thermal recovery well head gate valve, it leads to the flashboard up-and-down motion to lead to through the track more, and flashboard up-and-down motion can take place the friction with the track, so can lead to the process of flashboard up-and-down motion to rock, thereby can lead to the sealed not enough between flashboard and the gate valve, cause the liquid outflow, in addition, the sealed of present thermal recovery well head gate valve is mostly sealed one.

Aiming at the existing problems, a thermal production wellhead gate valve which can avoid liquid flowing out and can be sealed in multiple ways is developed.

Disclosure of Invention

In order to overcome the defect that liquid flows out due to insufficient sealing caused by abrasion of a flashboard, the existing thermal recovery wellhead gate valve has the defect that the sealing is mostly one-step sealing, and the invention aims to provide the thermal recovery wellhead gate valve which can avoid the liquid from flowing out and can be sealed in multiple ways.

The technical scheme is as follows: a thermal recovery wellhead gate valve comprises a first shell, a conveying shell, a second shell, a third shell, a fourth shell, an external thread rod, a rotary table, an internal thread pipe and a sealing assembly, wherein the first shell, the second shell and the third shell form a cavity for accommodating the sealing assembly, the second shell is positioned between the first shell and the third shell, the top of the third shell is communicated with the fourth shell, the two sides of the first shell are communicated with the conveying shell, the upper part of the inner cavity of the fourth shell is provided with a sliding groove, the external thread rod is rotatably arranged in the fourth shell, the upper end of the external thread rod extends out of the fourth shell and is provided with the rotary table, the lower part of the external thread rod is connected with the internal thread pipe through threads, the internal thread pipe is positioned in the inner cavity of the fourth shell, the upper edge of the internal thread pipe is T-shaped and is connected with the sliding groove in a sliding manner, and a sealing assembly for sealing the channel of the conveying shell is connected below the internal thread pipe through the third shell.

Preferably, the inner cavities of the first shell and the third shell are of semicircular structures, and two ends of the second shell are respectively connected with the first shell and the third shell and are of cylindrical cavity structures.

Preferably, seal assembly is including first valve body, second valve body and the third valve body of from top to bottom fixed mounting in proper order, the lower extreme at the internal thread pipe is installed to first valve body, the inner chamber shape of first valve body and third casing cooperatees, second valve body height is less than the second casing, the inner chamber shape of second valve body and second casing cooperatees, the inner chamber shape of third valve body and first casing cooperatees.

Preferably, the valve further comprises a first sealing ring, a first mounting groove is formed in the lower portion of the outer side wall of the second valve body, a first sealing ring is arranged in the first mounting groove, and the first sealing ring is in sliding fit with the inner wall of the second shell.

Preferably, two ends of the first sealing ring are inserted in a staggered manner to form a circular ring.

Preferably, still including second sealing ring and rubber ring, the second valve body outside wall of first mounting groove upside is opened there is the second mounting groove, be provided with the second sealing ring in the second mounting groove, the lateral wall of second sealing ring is opened there is the groove that holds, it is equipped with the rubber ring to hold the inslot, the inner wall sliding fit of rubber ring and second casing.

Preferably, two ends of the second sealing ring are inserted in a staggered manner to form a circular ring.

Preferably, still including the leading wheel, a plurality of leading wheels are installed to the equal rotary type in both sides on internal thread pipe upper portion, the leading wheel is located the sliding tray.

Preferably, the telescopic pipe is further included, a cavity is formed in the fourth shell on the lower side of the sliding groove, the telescopic pipe is sleeved outside the internal thread pipe and is located in the cavity, the upper end of the telescopic pipe is welded with the top in the cavity, and the lower end of the telescopic pipe is fixedly connected with the internal thread pipe.

Preferably, the glass window is further included, and the glass window is embedded in the upper portion of the outer side wall of the fourth shell.

The invention has the beneficial effects that:

the sealing assembly is matched with the inner cavity of the first shell in shape, so that the equipment can be sealed, and the liquid in the first shell can be prevented from flowing out to cause obstruction; the first sealing ring can be used for carrying out secondary sealing on the equipment, so that the sealing performance of the equipment is better; the second sealing ring is matched with the rubber ring, so that the space below the rubber ring can be further sealed, and liquid in the first shell is prevented from flowing upwards; the guide wheel can reduce the friction force generated by the up-and-down movement of the internal thread pipe, so that the service life of the sliding groove can be prolonged; the extension pipes can be stacked together by utilizing the upward movement of the internal thread pipe, so that the upper part of the cavity can be blocked and sealed, the fourth shell can be sealed, the equipment can be further sealed, and the sealing property of the equipment is improved by adopting multiple sealing; the position of the internally threaded pipe can be observed by utilizing the glass window, so that the equipment can be conveniently operated to open or close the brake.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a schematic cross-sectional view of a first embodiment of the present invention.

FIG. 3 is a schematic view of a half-section structure of the present invention.

Fig. 4 is a schematic view of a first structure of the second valve body of the present invention.

Fig. 5 is a schematic structural view of the second valve body of the present invention after the sealing ring is installed.

Fig. 6 is a schematic structural view of the first seal ring of the present invention.

Fig. 7 is a schematic sectional view of the second valve body according to the present invention.

Fig. 8 is a schematic structural view of a second seal ring according to the present invention.

Fig. 9 is a partially enlarged schematic view of an internally threaded tube of the present invention.

Number designation in the figures: 1. the device comprises a first shell, a second shell, a conveying shell, a third shell, a fourth shell, a sliding groove, a first valve body, a second valve body, a third valve body, a sliding groove, a second valve body, a male threaded rod, a rotating disc, a 9 internal threaded pipe, a first valve body, a second valve body, a 12 third valve body, a first mounting groove, a first sealing ring, a second mounting groove, a 16 second sealing ring, a 17 containing groove, a 18 rubber ring, a 19 guide wheel, a 20 cavity, a 21, a telescopic pipe, a 22 and a glass window.

Detailed Description

The above-described scheme is further illustrated below with reference to specific examples. It should be understood that these examples are for illustrative purposes and are not intended to limit the scope of the present application. The conditions used in the examples may be further adjusted according to the conditions of the particular manufacturer, and the conditions not specified are generally the conditions in routine experiments.

Example 1

A thermal recovery wellhead gate valve comprises a first shell 1, a conveying shell 2, a second shell 3, a third shell 4, a fourth shell 5, an external threaded rod 7, a rotary table 8, an internal threaded pipe 9 and a sealing assembly, wherein the first shell 1, the second shell 3 and the third shell 4 form a cavity for accommodating the sealing assembly, the second shell 3 is positioned between the first shell 1 and the third shell 4, the top of the third shell 4 is communicated with the fourth shell 5, the conveying shells 2 are respectively arranged at the left side and the right side of the first shell 1, the conveying shells 2 at the left side and the right side are respectively communicated with the first shell 1, the upper part of an inner cavity of the fourth shell 5 is provided with a sliding groove 6, the internal threaded rod 7 is rotatably arranged in the fourth shell 5, the upper end of the external threaded rod 7 extends out of the fourth shell 5 and is provided with the rotary table 8, the inner cavity of the fourth shell 5 is provided with the internal threaded pipe 9, the internal thread tube 9 is sleeved on the lower part of the external thread rod 7 in a thread mode, a bulge is arranged on the outer side of the upper edge of the internal thread tube 9 to form a T-shaped structure, the internal thread tube 9 is connected with the sliding groove 6 in a sliding mode through the T-shaped structure, and the sliding groove 6 plays a role in guiding and limiting on the other hand; a sealing assembly for sealing the passage of the conveying shell 2 is connected below the internally threaded pipe 9 through the third shell 4.

When needing to use, the user installs this equipment in suitable position, when needing to pass through this equipment and break floodgate, the user makes external screw thread pole 7 clockwise rotation through carousel 8, external screw thread pole 7 clockwise rotation can make internal thread pipe 9 upwards move, internal thread pipe 9 upwards moves and can make seal assembly upwards move, seal assembly upwards moves can relieve the closure to first casing 1, when needing to pass through this equipment and close the floodgate, the user makes external screw thread pole 7 anticlockwise rotation through carousel 8, so can make seal assembly move downwards, seal assembly and the interior chamber shape of first casing 1 cooperate, can accomplish the closure to first casing 1, accomplish and close the floodgate operation.

As shown in fig. 2 and 3, the sealing assembly includes a first valve body 10, a second valve body 11 and a third valve body 12, the first valve body 10 is connected to the lower end of the internally threaded pipe 9, the first valve body 10 is matched with the inner cavity of the third housing 4 in shape, the second valve body 11 is installed at the bottom of the first valve body 10, the second valve body 11 is lower than the second housing 3, the second valve body 11 is matched with the inner cavity of the second housing 3 in shape, the third valve body 12 is installed at the bottom of the second valve body 11, and the third valve body 12 is matched with the inner cavity of the first housing 1 in shape.

When the device is required to be opened, a user rotates the external threaded rod 7 clockwise through the rotary disc 8, the external threaded rod 7 clockwise rotates the internal threaded pipe 9 upwards, the internal threaded pipe 9 upwards moves the first valve body 10, the second valve body 11 and the third valve body 12 upwards, the third valve body 12 upwards moves the first housing 1 away from the first housing 1, so that the first housing 1 can be opened, the second valve body 11 upwards moves to match with the shape of the inner cavity of the second housing 3, the upper part of the first housing 1 can be sealed, liquid in the first housing 1 is prevented from upwards flowing through the second valve body 11, the first valve body 10 upwards moves to match with the shape of the inner cavity of the second housing 3, the upper part of the second housing 3 can be sealed, when the device is required to be closed, the user rotates the external threaded rod 7 anticlockwise through the rotary disc 8, the external threaded rod 7 anticlockwise rotates the internal threaded pipe 9 downwards, so can make third valve body 12 move down, because the interior bottom of first casing 1 is the arc, third valve body 12 moves down and cooperates with the inner chamber shape of first casing 1, so can be closed first casing 1 to avoid liquid to pass through first casing 1 and flow.

Example 2

On the basis of embodiment 1, as shown in fig. 4 to 6, the valve further includes a first sealing ring 14, a first installation groove 13 is formed in a lower portion of an outer side wall of the second valve body 11, the first sealing ring 14 is installed in the first installation groove 13, and the first sealing ring 14 is in sliding fit with an inner wall of the second housing 3.

The first sealing ring 14 is in sliding fit with the inner wall of the second housing 3, so that the space below the first sealing ring 14 can be sealed, and the port of the first sealing ring 14 is sealed in a staggered manner, so that a better sealing effect can be achieved.

As shown in fig. 4-8, the valve further includes a second sealing ring 16 and a rubber ring 18, a second mounting groove 15 is formed on the outer side wall of the second valve body 11 on the upper side of the first mounting groove 13, the second sealing ring 16 is disposed in the second mounting groove 15, a containing groove 17 is formed on the outer side wall of the second sealing ring 16, the rubber ring 18 is disposed in the containing groove 17, and the rubber ring 18 is in sliding fit with the inner wall of the second housing 3.

The adopted rubber ring 18 is in sliding fit with the inner wall of the second shell 3, so that the space below the rubber ring 18 can be further closed, and the liquid in the first shell 1 is prevented from flowing upwards.

As shown in fig. 3 and 9, the internal thread tube 9 further comprises at least three guide wheels 19 rotatably mounted on both left and right sides of the upper portion of the internal thread tube 9, and the guide wheels 19 are located in the sliding groove 6.

The guide wheel 19 can reduce the friction force of the up-and-down movement of the internal thread pipe 9 and prolong the service life of the sliding groove 6.

As shown in fig. 2 and fig. 3, the telescopic tube 21 is further included, a cavity 20 is formed in the fourth housing 5 on the lower side of the sliding groove 6, a telescopic tube 21 is sleeved outside the internal thread tube 9, the telescopic tube 21 is located in the cavity 20, the upper end of the telescopic tube 21 is fixedly connected with the top of the cavity 20, the lower end of the telescopic tube 21 is fixedly connected with the internal thread tube 9, and the telescopic tube 21 is made of rubber.

Utilize internal thread pipe 9 rebound can make flexible pipe 21 compressed pile up and expand to all around after together, so can make to block up the upper portion of cavity 20 and seal to seal fourth casing 5, can realize further sealing this equipment, the leakproofness of this equipment of multiple sealed increase of accessible.

As shown in fig. 1, a glass window 22 is further included, and the glass window 22 is embedded in an upper portion of an outer side wall of the fourth housing 5.

The position of the internally threaded tube 9 can be viewed through the glass window 22, so that the first housing 1 can be closed by the operating device with ease.

It should be understood by those skilled in the art that the above embodiments do not limit the present invention in any way, and all technical solutions obtained by using equivalent alternatives or equivalent variations fall within the scope of the present invention.

Claims

1. A thermal recovery wellhead gate valve is characterized by comprising a first shell (1), a conveying shell (2), a second shell (3), a third shell (4), a fourth shell (5), an external threaded rod (7), a rotary table (8), an internal threaded pipe (9) and a sealing assembly, wherein the first shell (1), the second shell (3) and the third shell (4) form a cavity for accommodating the sealing assembly, the second shell (3) is located between the first shell (1) and the third shell (4), the top of the third shell (4) is communicated with the fourth shell (5), the two sides of the first shell (1) are communicated with the conveying shell (2), the upper portion of an inner cavity of the fourth shell (5) is provided with a sliding groove (6), the external threaded rod (7) is installed in the fourth shell (5) in a rotating mode, the upper end of the external threaded rod (7) extends out of the fourth shell (5) and is provided with the rotary table (8), the lower part of the external threaded rod (7) is connected with an internal threaded pipe (9) through threads, the internal threaded pipe (9) is positioned in an internal cavity of the fourth shell (5), the upper edge of the internal threaded pipe (9) is T-shaped and is in sliding connection with the sliding groove (6), and a sealing assembly for sealing a channel of the conveying shell (2) is connected below the internal threaded pipe (9) through the third shell (4);

the sealing assembly comprises a first valve body (10), a second valve body (11) and a third valve body (12) which are fixedly mounted from top to bottom in sequence, the first valve body (10) is mounted at the lower end of the internal thread pipe (9), the first valve body (10) is matched with the shape of the inner cavity of the third shell (4), the second valve body (11) is lower than the second shell (3), the second valve body (11) is matched with the shape of the inner cavity of the second shell (3), and the third valve body (12) is matched with the shape of the inner cavity of the first shell (1);

the valve further comprises a first sealing ring (14), a first mounting groove (13) is formed in the lower portion of the outer side wall of the second valve body (11), the first sealing ring (14) is arranged in the first mounting groove (13), and the first sealing ring (14) is in sliding fit with the inner wall of the second shell (3);

two ends of the first sealing ring (14) are inserted in a staggered manner to form a circular ring;

still including second sealing ring (16) and rubber ring (18), open the second valve body (11) lateral wall of first mounting groove (13) upside has second mounting groove (15), be provided with second sealing ring (16) in second mounting groove (15), open the lateral wall of second sealing ring (16) has and holds groove (17), it is equipped with rubber ring (18) in groove (17) to hold, the inner wall sliding fit of rubber ring (18) and second casing (3).

2. A thermal recovery wellhead gate valve according to claim 1, characterized in that the inner cavities of the first casing (1) and the third casing (4) are of a semicircular structure, and both ends of the second casing (3) are respectively connected with the first casing (1) and the third casing (4) and are of a cylindrical cavity structure.

3. A thermal recovery wellhead gate valve according to claim 1 characterised in that the second seal ring (16) is interleaved at both ends to form a circular ring.

4. The thermal recovery wellhead gate valve according to claim 1, characterized by further comprising a plurality of guide wheels (19), wherein the guide wheels (19) are rotatably mounted on both sides of the upper part of the internally threaded pipe (9), and the guide wheels (19) are positioned in the sliding groove (6).

5. The thermal recovery wellhead gate valve according to claim 4, characterized by further comprising an extension tube (21), wherein a cavity (20) is formed in the fourth shell (5) on the lower side of the sliding groove (6), an extension tube (21) is sleeved outside the internal threaded tube (9), the extension tube (21) is located in the cavity (20), the upper end of the extension tube (21) is welded with the inner top of the cavity (20), and the lower end of the extension tube (21) is fixedly connected with the internal threaded tube (9).

6. A thermal recovery wellhead gate valve according to claim 5 and further comprising a glass window (22), the glass window (22) being embedded in the upper portion of the outer side wall of the fourth housing (5).