Ultrahigh-pressure low-leakage-rate sealing mechanism

Abstract

The invention relates to an ultrahigh-pressure low-leakage-rate sealing mechanism which is used for controlling circulation of high-pressure gas in an external pipeline system and comprises a valve seat, a valve body, a valve, a first locking spring, a second locking spring, a lock pin and an electric exploder. When the mechanism does not work, the valve is kept in a static state under the action of the first locking spring and the second locking spring, and high-pressure gas in an external pipeline system can normally circulate; when the mechanism receives a closing instruction signal, the electric exploder works to generate high-temperature and high-pressure fuel gas which directly acts on the valve, after the valve quickly moves along the central axis of the valve seat, the wedge-shaped port of the valve seat enters the non-metal soft material on the valve to form sealing, and meanwhile the lock pin pops up and is locked. The mechanism is simple in structure, small in-place impact and good in sealing keeping performance, and the influence on an external pipeline system during valve closing can be effectively reduced while high-pressure gas in the external pipeline system is cut off and sealed.

Description

Technical Field

[0001] The present invention relates to the field of aerospace engineering technology, and more specifically, to an ultra-high pressure and low leakage rate sealing mechanism. Background Art

[0002] The ultra-high pressure and low leakage rate sealing mechanism has two working states, namely the normal open state and the closed state after receiving the valve closing signal. The general working process of the ultra-high pressure and low leakage rate sealing mechanism is: ① open state, the high-pressure gas in the pipeline system flows normally, and the valve is initially locked; ② after receiving the valve closing signal, the electric detonator ignites to produce high-temperature and high-pressure combustion gas, and releases the initial lock of the valve; ③ the valve moves; ④ the valve moves into place, completes the instantaneous seal and maintains it, and cuts off the flow of high-pressure gas in the pipeline system.

[0003] According to the action form of the high-temperature and high-pressure gas generated by the electric detonator, the ultra-high-pressure and low-leakage rate sealing mechanism can generally be divided into two categories: direct action and indirect action. For the direct-acting ultra-high-pressure and low-leakage rate sealing mechanism, the high-temperature and high-pressure gas directly drives the valve to move. This type of ultra-high-pressure and low-leakage rate sealing mechanism has a simple structure and a very short action time. If the initial locking force is large or no buffering measures are adopted, it may produce a large impact in place, which will affect the sealing performance and the normal operation of the pipeline system. The indirect-acting ultra-high-pressure and low-leakage rate sealing mechanism uses a locking pin to achieve initial locking. After the high-temperature and high-pressure gas generated by the electric detonator acts on the locking pin to achieve initial locking and unlocking, the valve moves under the action of the elastic element. This type of ultra-high-pressure and low-leakage rate sealing mechanism has a relatively complex structure, and the power of the valve mainly comes from the elastic element, which is much smaller than the action force of the high-temperature and high-pressure gas, thereby reducing the working and sealing reliability. Summary of the invention

[0004] The embodiments of the present application provide an ultra-high pressure low leakage rate sealing mechanism. In order to have a basic understanding of some aspects of the disclosed embodiments, a simple summary is given below. This summary is not a general review, nor is it intended to identify key / important components or describe the scope of protection of these embodiments. Its only purpose is to present some concepts in a simple form as a preface to the detailed description that follows.

[0005] The embodiment of the present application provides an ultra-high pressure low leakage rate sealing mechanism, which includes: a valve seat, a valve body, a valve, a first locking spring, a second locking spring, a locking pin and an electric detonator, wherein:

[0006] One end of the valve body is connected to the valve seat, and the other end is used to set the electric detonator;

[0007] The center of the valve seat is provided with an air inlet passage, and one end located inside the valve body is provided with a wedge-shaped port;

[0008] An air outlet passage is provided at the upper end of the valve body, and the air inlet passage of the valve seat is connected to the air outlet passage of the valve body when the ultra-high pressure and low leakage rate sealing mechanism is in an open state;

[0009] The valve is set in a T-shape, the head of the valve corresponds to the wedge-shaped port of the valve seat, the protruding parts on both sides of the tail are respectively installed with the first locking spring and the second locking spring, and the other ends of the first locking spring and the second locking spring are respectively connected to the valve body;

[0010] The valve is installed at the radial center axis position of the valve body and the lock pin is arranged in the middle of the tail of the valve;

[0011] The valve body is also provided with an annular locking groove, and the locking pin pops out and enters the annular locking groove when the ultra-high pressure and low leakage rate sealing mechanism is closed.

[0012] According to a preferred embodiment, the head of the valve is provided with non-metallic soft material, so that when the ultra-high pressure and low leakage rate sealing mechanism is closed, the wedge-shaped port of the valve seat can enter the non-metallic soft material on the valve to form a seal.

[0013] According to a preferred embodiment, the air inlet passage of the valve seat is connected to the external air supply system by means of a threaded connection.

[0014] According to a preferred embodiment, the air outlet passage at the upper end of the valve body is connected to the external pipeline system by threaded connection.

[0015] According to a preferred embodiment, the tail of the valve and the electric detonator are tightly connected to the valve body, and a space for storing high-temperature and high-pressure fuel gas is formed between the valve and the electric detonator.

[0016] According to a preferred embodiment, the lock pin is conical in shape and has a guiding function. The lock pin cooperates with the annular lock groove to prevent the valve from moving in the opposite direction due to the high-pressure gas in the external pipeline system.

[0017] The technical solution provided by the embodiments of the present application may have the following beneficial effects:

[0018] In an embodiment of the present application, an ultra-high pressure low leakage rate sealing mechanism comprises: a valve seat, a valve body, a valve, a first locking spring, a second locking spring, a locking pin and an electric detonator, wherein: one end of the valve body is connected to the valve seat, and the other end is used to set the electric detonator; an air inlet channel is set at the center of the valve seat, and a wedge-shaped port is set at one end located inside the valve body; an air outlet channel is set at the upper end of the valve body, and the air inlet channel of the valve seat is connected with the air outlet channel of the valve body when the ultra-high pressure low leakage rate sealing mechanism is in an open state; the valve is set in a T-shape, the head of the valve corresponds to the wedge-shaped port of the valve seat, the protruding parts on both sides of the tail are respectively installed with the first locking spring and the second locking spring, and the other ends of the first locking spring and the second locking spring are respectively connected to the valve body; the valve is installed at the radial center axis position of the valve body and the locking pin is set in the middle of the tail of the valve; an annular locking groove is also set on the valve body, and the locking pin pops out and enters the annular locking groove when the ultra-high pressure low leakage rate sealing mechanism is closed. The ultra-high pressure and low leakage rate sealing mechanism described in the present application has a simple structure, small impact when in place, and good sealing retention performance. While achieving the cutoff and sealing of high-pressure gas in the external pipeline system, it can effectively reduce the impact on the external pipeline system when closing the valve.

[0019] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0021] Figure 1 It is a front schematic diagram of an ultra-high pressure and low leakage rate sealing mechanism provided in an embodiment of the present application in an open state;

[0022] Figure 2 It is a front schematic diagram of an ultra-high pressure and low leakage rate sealing mechanism provided in an embodiment of the present application during the closing process;

[0023] Figure 3 It is a front schematic diagram of an ultra-high pressure and low leakage rate sealing mechanism in a closed state provided in an embodiment of the present application.

[0024] Figure numerals: 1 - electric detonator; 2 - locking pin; 3 - first locking spring; 4 - valve; 5 - valve body; 6 - valve seat; 7 - second locking spring. DETAILED DESCRIPTION

[0025] The following description and the drawings sufficiently illustrate specific embodiments of the invention to enable those skilled in the art to practice them.

[0026] It should be clear that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Instead, they are only examples of systems and methods consistent with some aspects of the present invention as detailed in the attached claims.

[0028] In the description of the present invention, it should be understood that the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the previously associated objects are in an "or" relationship.

[0029] The following will be combined with the attached Figure 1 -Attached Figure 3 , an ultra-high pressure and low leakage rate sealing mechanism provided in an embodiment of the present application is introduced in detail.

[0030] The main purpose of this application is to provide a low-impact ultra-high pressure, low leakage rate sealing mechanism for controlling the flow of high-pressure gas in a pipeline system in order to address the deficiencies in the existing ultra-high pressure, low leakage rate sealing mechanism's impact control technology, instantaneous sealing and retention technology. The high-temperature and high-pressure combustion gas generated by the electric detonator in the ultra-high pressure, low leakage rate sealing mechanism directly acts on the valve. By reasonably reducing the initial locking force and taking buffering measures, the impact in place can be effectively controlled. The wedge-shaped port of the valve seat is used to enter the non-metallic soft material and lock it to achieve instantaneous sealing and retention. The ultra-high pressure, low leakage rate sealing mechanism has the characteristics of simple structure, safe and reliable operation, small impact in place, and good sealing performance, and is suitable for the aerospace field.

[0031] See also Figure 1 , is a front view schematic diagram of an ultra-high pressure low leakage rate sealing mechanism in an open state, provided in an embodiment of the present application. Figure 1As shown, an ultra-high pressure and low leakage rate sealing mechanism described in an embodiment of the present application may include: a valve seat (6), a valve body (5), a valve (4), a first locking spring (3), a second locking spring (7), a locking pin (2) and an electric detonator (1), wherein:

[0032] One end of the valve body (5) is connected to the valve seat (6), and the other end is used to set the electric detonator (1);

[0033] An air inlet passage is arranged at the center of the valve seat (6), and a wedge-shaped port is arranged at one end located inside the valve body (5);

[0034] An air outlet passage is provided at the upper end of the valve body (5), and when the ultra-high pressure and low leakage rate sealing mechanism is in an open state, the air inlet passage of the valve seat (6) is in communication with the air outlet passage of the valve body (5);

[0035] The valve (4) is arranged in a T-shape, the head of the valve (4) corresponds to the wedge-shaped port of the valve seat (6), the protruding parts on both sides of the tail are respectively installed with a first locking spring (3) and a second locking spring (7), and the other ends of the first locking spring (3) and the second locking spring (7) are respectively connected to the valve body (5);

[0036] The valve (4) is installed at the radial center axis position of the valve body (5) and a lock pin (2) is arranged in the middle of the tail of the valve (4);

[0037] An annular locking groove is also provided on the valve body (5), and the locking pin (2) pops out and enters the annular locking groove when the ultra-high pressure and low leakage rate sealing mechanism is closed.

[0038] Specifically, in the embodiment of the present application, the head of the valve (4) is provided with non-metallic soft material, so that when the ultra-high pressure low leakage rate sealing mechanism is closed, the wedge-shaped port of the valve seat (6) can enter the non-metallic soft material on the valve (4) to form a seal; the air inlet channel of the valve seat (6) is connected to the external air supply system by means of a threaded connection; the air outlet channel at the upper end of the valve body (5) is connected to the external pipeline system by means of a threaded connection; the tail of the valve (4) and the electric detonator (1) are tightly connected to the valve body (5), the electric detonator (1) and the valve body (5) are connected by threads, the valve (4) and the valve body (5) are clearance-matched, the valve (4) can move linearly relative to the valve body (5), and a space for storing high-temperature and high-pressure gas is formed between the valve (4) and the electric detonator (1); the lock pin (2) is conical in shape and has a guiding function, and the lock pin (2) cooperates with the annular lock groove to prevent the valve (4) from moving in the opposite direction due to the high-pressure gas in the external pipeline system.

[0039] like Figure 1As shown, when the ultra-high pressure low leakage rate sealing mechanism is in the open state, the initial locking of the valve (4) is provided by the compression force of the first locking spring (3) and the second locking spring (7), which can adapt to the mechanical environmental conditions generated during the launch of the carrier and leave a certain safety margin, so that the valve (4) is not affected by external forces and remains in a static state, and the high-pressure gas in the external pipeline system can circulate normally. Figure 2 As shown, when the ultra-high pressure low leakage rate sealing mechanism receives the valve closing signal, the high temperature and high pressure gas generated by the operation of the electric detonator (1) enters the space for storing the high temperature and high pressure gas formed between the valve (4) and the electric detonator (1), and directly acts on the valve (4). At this time, the action force of the high temperature and high pressure gas is much greater than the initial compression force of the first locking spring (3) and the second locking spring (7), thereby releasing the initial lock; as the valve (4) continues to move along the central axis of the valve seat (6), the first locking spring (3) and the second locking spring (7) continue to be compressed, and the first locking spring (3) and the second locking spring (7) can provide a buffering force opposite to the power, and the buffering force increases as the movement stroke of the valve (4) continues to increase, providing a buffering effect for the valve (4) to reduce the impact of the valve closing action, thereby effectively reducing the impact of the valve closing action on the external pipeline system; the first locking spring (3), the second locking spring (7) and the valve (4) cooperate with each other, and at the same time have the function of providing a reasonable initial locking force and buffering force for the valve (4), thereby effectively controlling the impact of the valve closing action. like Figure 3 As shown, when the valve (4) moves into position, the wedge-shaped port of the valve seat (6) instantly enters the non-metallic soft material on the valve (4) to form a seal, and at the same time, the locking pin (2) with a guiding function pops out and enters the annular locking groove. The conical surface of the conical locking pin (2) directly contacts the edge of the annular locking groove, which can prevent the valve (4) from moving in the opposite direction due to the high-pressure gas in the external pipeline system, thereby achieving reliable locking in position and maintaining the sealing performance, thereby achieving the truncation and sealing of the high-pressure gas in the external pipeline system, and finally ensuring that the sealing performance of the ultra-high pressure low leakage rate sealing mechanism in the closed state meets the requirements; in addition, the cooperation between the conical locking pin (2) and the annular locking groove has a certain adaptive ability to the output dispersion of the electric initiator (1), external load changes and assembly errors.

[0040] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0041] The above disclosure is only the preferred embodiment of the present application, which certainly cannot be used to limit the scope of rights of the present application. Therefore, equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. An ultra-high pressure and low leakage rate sealing mechanism, characterized in that: include: A valve seat, a valve body, a valve, a first locking spring, a second locking spring, a locking pin and an electric detonator, wherein: One end of the valve body is connected to the valve seat, and the other end is used to set the electric detonator; The center of the valve seat is provided with an air inlet passage, and one end located inside the valve body is provided with a wedge-shaped port; An air outlet passage is provided at the upper end of the valve body, and the air inlet passage of the valve seat is connected to the air outlet passage of the valve body when the ultra-high pressure and low leakage rate sealing mechanism is in an open state; The valve is set in a T-shape, the head of the valve corresponds to the wedge-shaped port of the valve seat, the protruding parts on both sides of the tail are respectively installed with the first locking spring and the second locking spring, and the other ends of the first locking spring and the second locking spring are respectively connected to the valve body; The valve is installed at the radial center axis position of the valve body and the lock pin is arranged in the middle of the tail of the valve; The valve body is also provided with an annular locking groove, and the locking pin pops out and enters the annular locking groove when the ultra-high pressure and low leakage rate sealing mechanism is closed.

2. The ultra-high pressure and low leakage rate sealing mechanism according to claim 1, characterized in that: The head of the valve is provided with non-metallic soft material, so that when the ultra-high pressure and low leakage rate sealing mechanism is closed, the wedge-shaped port of the valve seat can enter the non-metallic soft material on the valve to form a seal.

3. The ultra-high pressure and low leakage rate sealing mechanism according to claim 1, characterized in that: The air inlet passage of the valve seat is connected to the external air supply system by threaded connection.

4. The ultra-high pressure and low leakage rate sealing mechanism according to claim 1, characterized in that: The air outlet passage at the upper end of the valve body is connected to the external pipeline system by threaded connection.

5. The ultra-high pressure and low leakage rate sealing mechanism according to claim 1, characterized in that: The tail of the valve and the electric detonator are both tightly connected to the valve body, and a space for storing high-temperature and high-pressure fuel gas is formed between the valve and the electric detonator.

6. The ultra-high pressure and low leakage rate sealing mechanism according to claim 1, characterized in that: The lock pin is conical in shape and has a guiding function. The lock pin cooperates with the annular lock groove to prevent the valve from moving in the reverse direction due to the high-pressure gas in the external pipeline system.

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