Liquefied hydrocarbon low residue self-locking device

Abstract

This utility model relates to the field of connector technology, specifically to a low-residue self-locking device for liquefied hydrocarbons, including a connector pipe and a valve located inside the connector pipe. The connector pipe has an inlet and an outlet at both ends. The valve includes a plug that is adapted to the structure of the connector pipe near the outlet. A movable rod is connected to the side of the plug away from the outlet via a connecting seat. Two fixed protrusions are provided on the connecting seat along the axis of the movable rod. A fixed seat is provided at the end of the connector pipe near the inlet, with a through hole for the movable rod to pass through. A rotating shaft is provided on one side of the movable rod, passing through and rotatably mounted on the connector pipe. An arc-shaped actuating rod connected to the rotating shaft is provided inside the connector pipe, located between the two fixed protrusions. A handle connected to the rotating shaft is provided outside the connector pipe. When the valve is in the open state, liquefied hydrocarbons flow in the connector pipe; when the valve is in the closed state, the flow path of the liquefied hydrocarbons is cut off.

Description

Technical Field

[0001] This utility model relates to the field of connector technology, and in particular to a self-locking device for low residual liquid in liquefied hydrocarbons. Background Technology

[0002] Liquefied hydrocarbons are hydrocarbons that are turned into a liquid state by means of pressurization or cooling.

[0003] For example, a patent application with publication number CN215674124U, entitled "A Rotary Joint for Liquefied Hydrocarbons," was published on January 28, 2022. This application includes an aluminum shell sleeve with an end sleeve mounted on its outer wall. The end sleeve has a first anti-rotation pin inside and is connected to the aluminum shell sleeve via the first anti-rotation pin. A cast iron rotor is located inside the aluminum shell sleeve, with one end extending to the outside of the aluminum shell sleeve and the other end extending to the inside of the end sleeve. A second silicon carbide rotor seal is mounted near the end sleeve, and a second silicon carbide sealing strip is mounted on the outer wall of the second silicon carbide rotor seal, with the second silicon carbide sealing strip movably connected to the second silicon carbide rotor seal. This invention achieves reliable connection and use of the rotary joint for liquefied hydrocarbons and improves the sealing effect of the rotary joint. However, the applicant discovered that the joint lacks a valve to cut off the flow of liquefied hydrocarbons, preventing the flow of media such as liquefied hydrocarbons. Summary of the Invention

[0004] In view of this, the purpose of this utility model is to propose a self-locking device for low residual liquid of liquefied hydrocarbons, so as to solve the problem that some existing joints do not have valves to cut off the flow of liquefied hydrocarbons.

[0005] Based on the above objectives, this utility model provides a self-locking device for low residual liquid of liquefied hydrocarbons, including a connector pipe with an inlet and an outlet at both ends. A valve is installed inside the connector pipe between the inlet and the outlet. The valve includes a plug, which is adapted to the structure of the end of the connector pipe near the outlet, allowing the plug to abut and seal at the outlet to cut off the flow path of the liquefied hydrocarbons. A movable rod is connected to the side of the plug away from the outlet via a connecting seat. Two fixed protrusions are provided on the connecting seat along the axis of the movable rod. A fixed seat is provided inside the connector pipe near the inlet, with a through hole for the movable rod to pass through. A rotating shaft is provided on one side of the movable rod and is rotatably mounted on the connector pipe. An arc-shaped actuating rod connected to the rotating shaft is installed inside the connector pipe between the two fixed protrusions. Rotating the rotating shaft can drive the arc-shaped actuating rod to rotate synchronously. The arc-shaped actuating rod can act on the valve to open and close. A handle connected to the rotating shaft is provided outside the connector pipe.

[0006] Optionally, a limiting disc is provided on the rotating shaft outside the connector tube. The limiting disc has multiple equal-angle limiting grooves on the side facing the handle. A limiting rod is provided on the handle to cooperate with the limiting grooves. A movable hole is provided on the handle to accommodate the limiting rod. The limiting rod is connected to the bottom of the movable hole through a second spring. A pressing hole is provided on the side wall of the handle away from the rotating shaft. The middle part of the pressing hole is connected to the bottom of the movable hole through a connecting hole. A pressing rod is fitted inside the pressing hole. The pressing rod is connected to the bottom of the pressing hole through a first spring. A connecting rope is provided inside the connecting hole. The two ends of the connecting rope are connected to the pressing rod and the limiting rod, respectively.

[0007] Optionally, the fixed convex outer sleeve is provided with a protective elastic sleeve.

[0008] Optionally, a sleeve is provided on the side of the fixed seat facing the plug, which is fitted over the moving rod. An elastic spring is fitted over the moving rod, and the two ends of the elastic spring are respectively connected to the connecting seat and the fixed seat.

[0009] Optionally, the connector tube includes a first connecting tube with the inlet and a second connecting tube with the outlet. The lower part of the second connecting tube is sleeved on the upper outer side of the first connecting tube, and a sealing gasket is provided at the connection between the first connecting tube and the second connecting tube for sealing.

[0010] Optionally, the first connecting pipe has multiple connecting pipes arranged at equal angles connected to its side wall. A switch for opening and closing the connecting pipe is provided at the connection point between the connecting pipe and the side wall of the first connecting pipe. A recycling bin connected to all the connecting pipes is provided outside the first connecting pipe.

[0011] The beneficial effects of this utility model are as follows: This utility model provides a low-residue self-locking device for liquefied hydrocarbons. When it is necessary to open the valve, pulling the handle towards the outlet and rotating the rotating shaft counterclockwise causes the arc-shaped actuating rod connected to the rotating shaft to push the fixed protrusion downward, causing the moving rod to move towards the inlet, thus removing the plug from the position sealing the outlet and opening the flow path of the liquefied hydrocarbons. At this time, the plug is separated from the sealing position on the outlet of the connector pipe, and the liquefied hydrocarbons flow in the connector pipe. When it is necessary to close the valve, pulling the handle towards the inlet and rotating the rotating shaft clockwise causes the arc-shaped actuating rod connected to the rotating shaft to push the fixed protrusion upward, causing the moving rod to move towards the outlet, so that the plug can abut against the sealing position at the outlet, thereby cutting off the flow path of the liquefied hydrocarbons and achieving self-sealing. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a partial cross-sectional view of the present invention.

[0015] Figure 3 This is a partial structural schematic diagram of the present invention;

[0016] Figure 4 for Figure 3 Enlarged structural diagram at point A;

[0017] Figure 5 This is a schematic diagram of the connection structure between the limiting rod and the second spring of this utility model;

[0018] Figure 6 This is a schematic diagram of the handle structure of this utility model;

[0019] Figure 7 for Figure 6 Schematic diagram of the BB section;

[0020] Figure 8 for Figure 7 A schematic diagram of the CC section;

[0021] Figure 9 This is a schematic diagram of the internal cross-sectional structure of this utility model.

[0022] In the diagram: 1. Connector pipe; 2. First connecting pipe; 3. Second connecting pipe; 4. Inlet; 5. Outlet; 6. Plug; 7. Moving rod; 8. Elastic spring; 9. Sleeve; 10. Connecting seat; 11. Fixed seat; 12. Fixed protrusion; 13. Arc-shaped actuating rod; 14. Rotating shaft; 15. Handle; 16. Limiting disc; 17. Limiting groove; 18. Limiting rod; 19. Movable hole; 20. Connecting rope; 21. Pressing rod; 22. Pressing hole; 23. First spring; 24. Connecting hole. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0024] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0025] like Figures 1 to 9 As shown, a low-residue self-locking device for liquefied hydrocarbons includes a connector pipe 1 with a smooth inner wall to reduce residual liquefied hydrocarbons. The connector pipe 1 has an inlet 4 and an outlet 5 at its two ends. A valve is installed between the inlet 4 and the outlet 5 within the connector pipe 1. The valve includes a plug 6, which is adapted to the structure of the end of the connector pipe 1 near the outlet 5, allowing the plug 6 to abut and seal at the outlet 5, thus cutting off the flow path of the liquefied hydrocarbons. A movable rod 7 is connected to the side of the plug 6 away from the outlet 5 via a connecting seat 10. A movable rod 7 is mounted on the connecting seat 10 along the axis of the movable rod 7. Two fixed protrusions 12 are arranged in the linear direction. A fixed seat 11 is provided at one end of the connector tube 1 near the inlet 4. A through hole for the moving rod 7 to pass through is provided on the fixed seat 11. A rotating shaft 14 is provided on one side of the moving rod 7 and is rotatably mounted on the connector tube 1. An arc-shaped actuating rod 13 connected to the rotating shaft 14 is provided inside the connector tube 1. The arc-shaped actuating rod 13 is located between the two fixed protrusions 12. Rotating the rotating shaft 14 can drive the arc-shaped actuating rod 13 to rotate synchronously. The arc-shaped actuating rod 13 can act on the valve and open and close it. A handle 15 connected to the rotating shaft 14 is provided outside the connector tube 1.

[0026] When the valve needs to be opened, pull the handle 15 to rotate towards the outlet 5 and rotate the rotating shaft 14 counterclockwise. This causes the arc-shaped actuating rod 13 connected to the rotating shaft 14 to push the fixed protrusion 12 downward, so that the moving rod 7 moves towards the inlet 4. This moves the plug 6 away from the position that seals the outlet 5, opening the flow path of the liquefied hydrocarbon. At this time, the plug 6 is separated from the sealing position on the outlet 5 of the connector pipe 1, and the liquefied hydrocarbon flows in the connector pipe 1. When the valve needs to be closed, pull the handle 15 to rotate towards the inlet 4 and rotate the rotating shaft 14 clockwise. This causes the arc-shaped actuating rod 13 connected to the rotating shaft 14 to push the fixed protrusion 12 upward, so that the moving rod 7 moves towards the outlet 5. This allows the plug 6 to abut against the sealing position at the outlet 5, cutting off the flow path of the liquefied hydrocarbon and achieving self-sealing.

[0027] When the valve is open, the liquefied hydrocarbons flow in connector pipe 1; when the valve is closed, the flow path of the liquefied hydrocarbons is cut off, achieving a self-sealing effect.

[0028] A limiting disc 16 is provided on the rotating shaft 14 outside the connector tube 1. The limiting disc 16 has multiple equal-angle limiting grooves 17 on the side facing the handle 15. The handle 15 has a limiting rod 18 that cooperates with the limiting grooves 17. The handle 15 has a movable hole 19 for accommodating the limiting rod 18. The limiting rod 18 is connected to the bottom of the movable hole 19 by a second spring. A pressing hole 22 is provided on the side wall of the handle 15 away from the rotating shaft 14. The middle part of the pressing hole 22 is connected to the bottom of the movable hole 19 through a connecting hole 24. A pressing rod 21 is fitted inside the pressing hole 22. The pressing rod 21 is connected to the bottom of the pressing hole 22 by a first spring 23. A connecting rope 20 is provided inside the connecting hole 24. The two ends of the connecting rope 20 are connected to the pressing rod 21 and the limiting rod 18, respectively.

[0029] When the valve needs to be in the open position, hold the handle 15 and press the push rod 21 into the push hole 22. The connecting rope 20 pulls the limiting rod 18, causing it to disengage from the limiting groove 17, thus releasing the locking state of the handle 15. Then, swing the handle 15 to move the moving rod 7, causing the plug 6 to separate from the sealing position on the outlet 5 of the connector pipe 1. The liquefied hydrocarbon flows in the connector pipe 1. After the handle 15 is moved to the appropriate position, first release the push rod 21. Under the action of the first spring 23, the push rod 21 extends out of the push hole 22. At this time, the connecting rope 20 is released, pulling the limiting rod 18. Under the action of the second spring, the limiting rod 18 extends into the limiting groove 17, and the handle 15 is in the locked state. This locking state prevents the valve from changing its state under the influence of factors such as the pressure of the liquefied hydrocarbon medium, thus ensuring the stability and safety of operation and reducing accidents caused by unexpected changes in state. Risk: When the valve needs to be closed, holding the handle 15 will push the push rod 21 into the push hole 22. The connecting rope 20 will pull the limiting rod 18, causing the limiting rod 18 to disengage from the limiting groove 17, thus releasing the locking state of the handle 15. Then, swinging the handle 15 will move the moving rod 7 upward, allowing the plug 6 to abut against the sealing position at the outlet 5 to cut off the flow path of liquefied hydrocarbons. After the handle 15 is moved to the appropriate position, the push rod 21 will be released first. Under the action of the first spring 23, the push rod 21 will extend out of the push hole 22. At this time, the connecting rope 20 will be released to pull the limiting rod 18. Under the action of the second spring, the limiting rod 18 will extend into the limiting groove 17, and the handle 15 will be locked. This locking state prevents the valve from changing its state on its own under the influence of factors such as the pressure of the liquefied hydrocarbon medium, ensuring the stability and safety of operation.

[0030] The connecting rope 20 can be a tension-free rope. After the push-button 21 is pressed, the connecting rope 20 immediately pulls the limiting rod 18 away from the limiting groove 17 on the limiting disc 16, and the limiting rod 18 enters the movable hole 19, ending the restriction between the handle 15 and the limiting disc 16.

[0031] The connecting rope 20 can be a small elastic rope. The use of a small elastic rope facilitates the connection between the limiting rod 18 and the pressing rod 21, and provides buffer protection when the limiting rod 18 and the pressing rod 21 move. After using the elastic rope, pressing the pressing rod 21 will pull the limiting rod 18 away from the limiting groove 17 on the limiting disc 16, and the limiting rod 18 will move into the movable hole 19.

[0032] The fixed protrusion 12 is covered with a protective elastic sleeve, which can rotate around the fixed protrusion 12 to reduce wear on the fixed protrusion 12.

[0033] A sleeve 9 is provided on the side of the fixed seat 11 facing the plug 6, which is fitted over the moving rod 7. An elastic spring 8 is fitted over the moving rod 7. The two ends of the elastic spring 8 are connected to the connecting seat 10 and the fixed seat 11 respectively, so that the sleeve 9 can easily restrict the direction of the moving rod 7. The elastic spring 8 improves the sealing performance by blocking the outlet 5 of the plug 6 and cutting off the flow path of liquefied hydrocarbons.

[0034] The connector pipe 1 includes a first connecting pipe 2 with the inlet 4 and a second connecting pipe 3 with the outlet 5. The lower part of the second connecting pipe 3 is sleeved on the upper outer side of the first connecting pipe 2, and a sealing gasket is provided at the connection between the first connecting pipe 2 and the second connecting pipe 3 for sealing.

[0035] Multiple connecting pipes arranged at equal angles are connected to the side wall of connector pipe 1. A switch is provided at the connection point between the connecting pipe and the side wall of connector pipe 1. The switch can be a ball valve. A recovery tank connected to all the connecting pipes is provided outside connector pipe 1. The recovery tank is connected to a negative pressure machine through a gas phase pipeline. When there is liquefied hydrocarbon residue in connector pipe 1, the negative pressure machine is started, and the liquefied hydrocarbon residue in connector pipe 1 enters the recovery tank through the connecting pipe for recovery and treatment, thereby reducing the residual amount of liquefied hydrocarbon residue in connector pipe 1.

[0036] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0037] The embodiments of this utility model are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A low residue self-locking device for liquefied hydrocarbon comprising a joint pipe, said joint pipe having an inlet and an outlet provided at both ends respectively, characterized in that, The connector tube contains a valve located between the inlet and the outlet. The valve includes a plug that is adapted to the structure of the connector tube near the outlet, allowing the plug to abut and seal at the outlet to cut off the flow path of the liquefied hydrocarbon. A movable rod is connected to the side of the plug away from the outlet via a connecting seat. Two fixed protrusions are provided on the connecting seat along the axis of the movable rod. A fixed seat is provided at the end of the connector tube near the inlet, and a through hole is provided on the fixed seat for the movable rod to pass through. A rotating shaft is provided on one side of the movable rod and is rotatably mounted on the connector tube. An arc-shaped actuating rod connected to the rotating shaft is provided inside the connector tube. The arc-shaped actuating rod is located between the two fixed protrusions. Rotating the rotating shaft can drive the arc-shaped actuating rod to rotate synchronously. The arc-shaped actuating rod can act on the valve to open and close. A handle connected to the rotating shaft is provided outside the connector tube.

2. The liquefied hydrocarbon low-residue self-locking device according to claim 1, characterized in that, A limiting disc is provided on the rotating shaft outside the connector tube. Multiple equal-angle limiting grooves are provided on the side of the limiting disc facing the handle. A limiting rod is provided on the handle to cooperate with the limiting grooves. A movable hole is provided on the handle to accommodate the limiting rod. The limiting rod is connected to the bottom of the movable hole via a second spring. A pressing hole is provided on the side wall of the handle away from the rotating shaft. The middle part of the pressing hole is connected to the bottom of the movable hole via a connecting hole. A pressing rod is fitted inside the pressing hole. The pressing rod is connected to the bottom of the pressing hole via a first spring. A connecting rope is provided inside the connecting hole, and both ends of the connecting rope are connected to the pressing rod and the limiting rod, respectively.

3. The liquefied hydrocarbon low-residue self-locking device according to claim 1, characterized in that, The fixed convex outer sleeve is equipped with a protective elastic sleeve.

4. The liquefied hydrocarbon low-residue self-locking device according to claim 1, characterized in that, A sleeve is provided on the side of the fixed seat facing the plug, which is fitted over the moving rod. An elastic spring is fitted over the moving rod, and the two ends of the elastic spring are connected to the connecting seat and the fixed seat respectively.

5. A liquefied hydrocarbon low-residue self-locking device according to claim 1, characterized in that, The connector pipe includes a first connecting pipe with the inlet and a second connecting pipe with the outlet. The lower part of the second connecting pipe is sleeved on the upper outer side of the first connecting pipe, and a sealing gasket is provided at the connection between the first connecting pipe and the second connecting pipe for sealing.

6. A self-locking device for low residual liquid in liquefied hydrocarbons according to claim 1, characterized in that, The first connecting pipe has multiple connecting pipes arranged at equal angles on its side wall. A switch for opening and closing the connecting pipe is provided at the connection point between the connecting pipe and the side wall of the first connecting pipe. A recycling bin connected to all the connecting pipes is provided outside the first connecting pipe.

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