CN218294580U

CN218294580U - Valve opened and closed under control of inlet pressure

Info

Publication number: CN218294580U
Application number: CN202221859832.5U
Authority: CN
Inventors: 王喜良
Original assignee: Landspace Technology Co Ltd
Current assignee: Landspace Technology Co Ltd
Priority date: 2022-07-19
Filing date: 2022-07-19
Publication date: 2023-01-13
Anticipated expiration: 2032-07-19

Abstract

The utility model provides a valve that opens and shuts by entry pressure control, this valve includes: the inlet shell and the outlet shell are fixedly connected, a guide sleeve is fixedly arranged in the outlet shell, a valve core is movably arranged in a sleeve at one end, close to the outlet shell, of the guide sleeve, and a sealing structure is formed between one end, located outside the guide sleeve, of the valve core and the outlet shell and used for sealing an outlet channel of the outlet shell. An adjusting seat is further arranged in the sleeve at one end, close to the inlet shell, of the guide sleeve, and a spring is arranged between the adjusting seat and the valve core and used for applying elastic pressure on the outlet shell to the valve core. A gap is formed between the end face of the part of the valve core, which is close to the end part of the outlet shell, and is used for applying reverse thrust for counteracting the elastic pressure to the end face of the valve core by media. The valve is not driven by external energy, and the opening and closing of the valve can be controlled only according to the pressure of a medium in the valve. The opening and closing process depends on a pure mechanical structure, and the running reliability of the valve is ensured.

Description

Valve opened and closed under control of inlet pressure

Technical Field

The utility model relates to a control flap technical field specifically is a valve by entry pressure control opening and shutting.

Background

Many valves are required in the propellant supply system of liquid rocket engines to control the supply of propellant. In the prior art, control valves are often adopted in propellant supply systems of liquid rocket engines. The control valve has high reaction speed and relatively good control effect. However, in the propellant supply system of liquid rocket engines, not all control valves are required to open and close quickly (milliseconds). Therefore, performance is not fully utilized for control valves that do not require rapid opening and closing, i.e., control valves that do not have the requirement for rapid response. The control valve in the propellant supply system of a liquid rocket engine is mostly a solenoid valve. However, the solenoid valve needs to be driven by energy, and a control cavity is also arranged on the structure, so that the volume of the valve is increased. Therefore, the problem of structural arrangement of the control valve is also considered when designing the supply system, and a reasonable installation space is designed for the control valve. On the other hand, the solenoid valve is expensive to manufacture, which further increases the cost of the supply system.

In addition, the working environment of the valve in the propellant supply system is often a low-temperature environment, and the low-temperature environment may also cause the internal temperature of the valve to be too low, which affects the circuit control of the control valve and further causes the operation failure of the supply system.

Therefore, a valve which has a simple structure, does not need to be driven by external energy, can adapt to a low-temperature environment and is reliable in operation is needed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's not enough, provide a valve by entry pressure control opening and shutting to solve among the prior art valve structure complicacy, with high costs, need the unreliable problem of energy drive and low temperature environment operation.

The utility model provides a valve that opens and shuts by entry pressure control, this valve includes: the inlet shell and the outlet shell are fixedly connected, a guide sleeve is fixedly arranged in the outlet shell, and an internal flow passage for communicating a cavity of the inlet shell with a cavity of the outlet shell is formed in the side wall of the guide sleeve; a valve core is movably arranged in the sleeve at one end of the guide sleeve close to the outlet shell, and a sealing structure is formed between one end of the valve core positioned outside the guide sleeve and the outlet shell and used for sealing an outlet channel of the outlet shell; an adjusting seat is further arranged in the sleeve at one end, close to the inlet shell, of the guide sleeve, and a spring is arranged between the adjusting seat and the valve core and used for applying elastic pressure on the outlet shell to the valve core; and a gap is formed between the end surface of the valve core, which is close to the end part of the outlet shell, and is used for applying reverse thrust for counteracting elastic pressure to the end surface of the valve core by a medium.

Furthermore, a support ring is fixedly arranged on the outer wall of one end of the valve core, which is positioned in the guide sleeve; and a first sealing ring is arranged between the support ring and the outer wall step on the valve core along the axial direction of the guide sleeve and is used for sealing a gap between the valve core and the inner wall of the guide sleeve.

Furthermore, the adjusting seat is connected to the guide sleeve through a locking nut; the outer wall and the inner wall of the locking nut are both provided with threads, and the threads on the outer wall of the locking nut are matched and connected with the threads on the inner wall of the guide sleeve; the threads on the inner wall of the locking nut are matched and connected with the threads on one end, far away from the spring, of the adjusting seat, and are used for fixing and adjusting the relative position between the adjusting seat and the guide sleeve.

Furthermore, along the axis direction of the guide sleeve, a second sealing ring is arranged between the locking nut and an outer wall step on the adjusting seat and used for sealing a gap between the adjusting seat and the guide sleeve.

Furthermore, the first sealing ring and the second sealing ring are elastic energy storage sealing rings, and each elastic energy storage sealing ring is composed of a shell made of polymer materials and an elastic part and is used for enabling the sealing ring to be tightly attached to a sealing position.

The utility model discloses an in the embodiment, seal structure includes: the third sealing ring is arranged in an end sealing groove at one end of the outlet shell, the third sealing ring corresponds to the annular sealing bulge in position and is used for forming a sealing structure to isolate the inner cavity of the outlet shell from the outlet channel.

The utility model discloses an among the embodiment, the lateral wall of uide bushing with be provided with on the lateral wall of export casing with one heart and let out the leak hole, be used for entering into the inside medium discharge of uide bushing.

The utility model discloses an among the embodiment, the inside runner is followed the axis direction of uide bushing runs through the lateral wall of uide bushing, and not with the inner chamber intercommunication of uide bushing.

In the implementation mode of the utility model, a spring seat is fixedly arranged at one end of the adjusting seat close to the valve core and is used for connecting one end of the spring; and one end of the valve core, which is close to the adjusting seat, is provided with a blind hole, and the other end of the spring extends into the blind hole and is used for radial limiting when the spring stretches.

The utility model discloses an among the embodiment, the entry casing with the junction of export casing is provided with the fourth sealing washer for prevent that the medium from leaking from the junction.

According to the above embodiment, the present invention provides a valve controlled by inlet pressure to open and close, which has the following advantages: compared with a control valve in the prior art, the valve does not depend on the driving of an external energy source, and the opening and closing of the control valve can be realized only according to the pressure of a medium entering from the inlet of the valve. Compared with a control valve, the opening and closing process of the valve depends on a pure mechanical structure, and the operation reliability of the valve is ensured. And the valve with a pure mechanical structure is lower in manufacturing cost compared with the valve with a control type.

In addition, this valve is applied to low temperature environment, compares control type valve, and this valve is pure mechanical structure, can avoid low temperature environment to the influence of valve control, has guaranteed the stability of system's operation.

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, as claimed.

Drawings

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

Fig. 1 is a structural diagram of the closed state of the valve controlled by the inlet pressure according to the present invention.

Fig. 2 is a structural diagram of the opening state of the valve that is controlled to open and close by the inlet pressure according to the present invention.

Description of reference numerals:

1-inlet shell, 2-outlet shell, 3-valve core, 4-guide sleeve, 5-adjusting seat, 6-spring, 7-support ring, 8-first seal ring, 9-second seal ring, 10-lock nut, 11-third seal ring, 12-annular seal bulge, 13-spring seat, 14-outlet channel, 15-leakage hole, 16-internal flow channel and 17-fourth seal ring.

Detailed Description

Reference will now be made in detail to various exemplary embodiments of the invention, which should not be considered limiting of the invention, but rather should be understood to be a more detailed description of certain aspects, features and embodiments of the invention.

It will be apparent to those skilled in the art that various modifications and variations can be made in the embodiments of the present disclosure without departing from the scope or spirit of the disclosure. Other embodiments will be apparent to those skilled in the art from consideration of the specification. The specification and examples are exemplary only.

The utility model provides a valve which is controlled by inlet pressure to open and close, and is shown as a closed state diagram of the valve in figure 1. In a particular embodiment of the present invention, the valve comprises: fixedly connected inlet housing 1 and outlet housing 2. Specifically, the inlet housing 1 and the outlet housing 2 are sleeved by a screw thread, and the inlet housing 1 and the outlet housing 2 are preferably made of metal. The outlet housing 2 is internally and fixedly provided with a guide sleeve 4, and the side wall of the guide sleeve 4 is provided with an internal flow passage 16 for communicating the cavity of the inlet housing 1 and the cavity of the outlet housing 2. Ensuring that the medium can flow from the cavity of the inlet housing 1 into the cavity of the outlet housing 2. A valve core 3 is movably arranged in a sleeve at one end of the guide sleeve 4 close to the outlet shell 2, and the valve core 3 can linearly translate in the guide sleeve 4. In addition, a sealing structure is formed between one end of the valve core 3 positioned outside the guide sleeve 4 and the outlet housing 2, and the sealing structure is used for sealing the outlet channel 14 of the outlet housing 2 and preventing the medium inside the cavity formed by combining the inlet housing 1 and the outlet housing 2 from leaking from the outlet channel 14.

An adjusting seat 5 is further arranged in a sleeve at one end, close to the inlet shell 1, of the guide sleeve 4, a spring 6 is arranged between the adjusting seat 5 and the valve core 3, and the spring 6 is used for applying elastic pressure on the valve core 3 and pressing the valve core 3 on the outlet shell 2, so that a sealing structure between the valve core 3 and the outlet shell 2 can play a sealing role.

A gap is formed between the end surface of the valve core 3 close to the end part of the outlet housing 2 and the outlet housing 2, and is used for applying reverse thrust for counteracting the elastic pressure to the end surface of the valve core 3 by medium. I.e. there is a gap between the end of the spool 3 outside the sealing arrangement and the outlet housing 2 for the medium pressure to exert a thrust on the end of the spool 3. This pushing force and the elastic force of the spring 6 cancel each other until the seal structure fails to exert a sealing effect and the medium flows out from the outlet passage 14. As shown in fig. 2, the direction indicated by the arrow in the figure is the flow direction of the medium.

In the specific embodiment of the utility model, the outer wall of the one end that case 3 is located uide bushing 4 is fixed and is provided with support ring 7. Specifically, the support ring 7 has an internal thread, the outer wall of the end of the valve core 3 has an external thread matching with the internal thread, and the support ring 7 is screwed with the valve core 3.

Furthermore, the outer wall of the valve core 3 is provided with steps, a first sealing ring 8 is arranged between the support ring 7 and the step of the outer wall of the valve core 3 close to the support ring 7 along the axial direction of the guide sleeve 4, and the first sealing ring 8 is used for sealing a gap between the valve core 3 and the inner wall of the guide sleeve 4.

Specifically, the first sealing ring 8 is an elastic energy storage sealing ring, and the elastic energy storage sealing ring is composed of a shell made of a polymer material and an elastic part and used for enabling the sealing ring to be tightly attached to a sealing position. In this embodiment, the first sealing ring 8 is axially sealed between the valve element 3 and the guide sleeve 4, so the radial direction of the first sealing ring 8 needs to be in contact with and sealed with the valve element 3 and the guide sleeve 4 respectively. Therefore, the elastic energy storage sealing ring is arranged at the sealing position, the elastic piece is in a pressed state, elastic force is applied to two sides of the elastic piece along the radial direction of the sealing ring, the inner wall of the first sealing ring 8 is enabled to be tightly attached to the outer wall of the valve core 3, the outer wall of the first sealing ring 8 is tightly attached to the inner wall of the guide sleeve 4, and the sealing effect is improved. The first sealing ring 8 is an elastic energy storage sealing ring to adapt to the low-temperature and high-pressure environment, so that the sealing structure is more reliable, and the sealing effect is better.

In the specific embodiment of the present invention, the adjusting seat 5 is connected to the guiding sleeve 4 through the lock nut 10. Specifically, both the outer wall and the inner wall of the lock nut 10 are threaded. The thread of the outer wall of the locking nut 10 is matched and connected with the thread of the inner wall of the guide sleeve 4. The thread of the inner wall of the lock nut 10 is in fit connection with the thread on one end of the adjusting seat 5 far away from the spring 6, and is used for fixing and adjusting the relative position between the adjusting seat 5 and the guide sleeve 4.

Furthermore, the outer wall of the adjusting seat 5 is provided with a step, a second sealing ring 9 is arranged between the locking nut 10 and the step of the outer wall of the adjusting seat 5 close to the locking nut 10 along the axial direction of the guide sleeve 4, and the second sealing ring 9 is used for sealing a gap between the adjusting seat 5 and the guide sleeve 4.

Specifically, the second sealing ring 9 is an elastic energy storage sealing ring, and the elastic energy storage sealing ring is composed of a shell made of a polymer material and an elastic part and used for enabling the sealing ring to be tightly attached to a sealing position. In this embodiment, the second sealing ring 9 is used for axially sealing between the valve core 3 and the guide sleeve 4, so the radial direction of the second sealing ring 9 needs to separately contact and seal the valve core 3 and the guide sleeve 4. Therefore, the elastic energy storage sealing ring is arranged at the sealing position, the elastic piece is in a pressed state, elastic force is applied to two sides of the elastic piece along the radial direction of the sealing ring, the inner wall of the second sealing ring 9 is enabled to be tightly attached to the outer wall of the valve core 3, the outer wall of the second sealing ring 9 is tightly attached to the inner wall of the guide sleeve 4, and the sealing effect is improved. The second sealing ring 9 is an elastic energy storage sealing ring to adapt to the low-temperature and high-pressure environment, so that the sealing structure is more reliable, and the sealing effect is better.

In a particular embodiment, the sealing structure includes: a third sealing ring 11 and an annular sealing projection 12. Wherein the annular sealing protrusion 12 is located at the periphery of the outlet channel 14 inside the outlet housing 2, and the annular sealing protrusion 12 is integrally formed with the outlet housing 2. The third sealing ring 11 is arranged in an end sealing groove at one end of the valve core 3 close to the outlet shell 2. The third sealing ring 11 corresponds to the annular sealing protrusion 12 in position and is used for forming a sealing structure to isolate the inner cavity of the outlet housing 2 from the outlet passage 14.

In this embodiment, on one hand, the annular sealing protrusion 12 is to leave a gap between the outlet housing 2 and the valve core 3, so that the medium inside the cavity can fill the gap between the valve core 3 and the outlet housing 2, and the medium applies an axial thrust to the valve core 3 to offset the elastic pressure of the spring 6, so that the valve core 3 moves backwards, thereby opening the valve.

On the other hand, the annular sealing protrusion 12 is provided to reduce the contact area between the annular sealing protrusion 12 and the third sealing ring 11, increase the pressure per unit area, and improve the sealing effect.

The material of the third seal ring 11 is non-metal, and preferably, the material of the third seal ring 11 may be graphite, rubber, or polytetrafluoroethylene. The material is mainly selected according to the medium circulating in the valve cavity, so that the medium is prevented from reacting with the sealing ring. Generally, the material of the sealing ring is selected to have high compatibility, i.e., not to react with the medium.

The utility model discloses an among the specific embodiment, be provided with leakage hole 15 on the lateral wall of uide bushing 4 and the lateral wall of export casing 2 with one heart for the medium that will enter into uide bushing 4 inside is discharged. Specifically, the leakage hole 15 penetrates through the side wall of the guide sleeve 4 and the side wall of the outlet housing 2, the inner cavity of the guide sleeve 4 is communicated with the outside of the valve, and the medium entering the inner cavity of the guide sleeve 4 is discharged out of the valve housing. The leakage hole 15 is arranged to ensure that the pressure of the cavity formed by the guide sleeve 4, the valve core 3 and the adjusting seat 5 is the same as the pressure outside the valve, ensure that the medium can push the valve core 3 to move within a set pressure range, and ensure the working stability of the valve. The direction in which the medium is discharged at the leak hole 15 is the direction indicated by the arrow shown in fig. 2.

The utility model discloses an among the specific embodiment, the lateral wall that the interior runner 16 on the uide bushing 4 runs through uide bushing 4 along the axis direction of uide bushing 4, and not communicate with the inner chamber of uide bushing 4, realizes the cavity of intercommunication entry casing 1 and the cavity of export casing 2, lets the medium can freely circulate between entry casing 1 and export casing 2.

The utility model discloses an among the concrete embodiment, the one end that adjusting seat 5 is close to case 3 is fixed to be provided with spring holder 13, and spring holder 13 is used for connecting spring 6's one end. In addition, one end of the valve core 3 close to the adjusting seat 5 is provided with a blind hole, and the other end of the spring 6 extends into the blind hole and is used for radial limiting when the spring 6 stretches out and draws back. In this embodiment, the blind hole is located at the axis of the valve core 3, so as to ensure that the elastic pressure applied to the valve core 3 by the spring is uniform, ensure that the third sealing ring 11 and the annular sealing protrusion 12 are sealed uniformly, and avoid leakage.

In the specific embodiment of the present invention, the joint of the inlet housing 1 and the outlet housing 2 is provided with a fourth seal ring 17 for preventing the medium from leaking from the joint.

The utility model discloses an among the embodiment, adopt threaded connection's mode to carry out fixed connection between uide bushing 4 and the 2 inner walls of export casing.

The foregoing is only an illustrative embodiment of the present invention, and any equivalent changes and modifications made by those skilled in the art without departing from the spirit and principles of the present invention should fall within the protection scope of the present invention.

Claims

1. A valve that is controlled to open and close by inlet pressure, the valve comprising: the device comprises an inlet shell (1) and an outlet shell (2) which are fixedly connected, wherein a guide sleeve (4) is fixedly arranged in the outlet shell (2), and an internal flow channel (16) for communicating a cavity of the inlet shell (1) with a cavity of the outlet shell (2) is arranged on the side wall of the guide sleeve (4);

a valve core (3) is movably mounted in a sleeve at one end, close to the outlet shell (2), of the guide sleeve (4), and a sealing structure is formed between one end, located outside the guide sleeve (4), of the valve core (3) and the outlet shell (2) and used for sealing an outlet channel (14) of the outlet shell (2);

an adjusting seat (5) is further arranged in a sleeve at one end, close to the inlet shell (1), of the guide sleeve (4), and a spring (6) is arranged between the adjusting seat (5) and the valve core (3) and used for applying elastic pressure on the outlet shell (2) to the valve core (3);

and a gap is formed between the partial end surface of the valve core (3) close to the end part of the outlet shell (2) and is used for applying reverse thrust for counteracting elastic pressure to the end surface of the valve core (3) by a medium.

2. The inlet pressure controlled opening and closing valve according to claim 1, characterized in that a support ring (7) is fixedly arranged on the outer wall of one end of the valve core (3) positioned in the guide sleeve (4);

and a first sealing ring (8) is arranged between the support ring (7) and the outer wall step on the valve core (3) along the axial direction of the guide sleeve (4) and is used for sealing a gap between the valve core (3) and the inner wall of the guide sleeve (4).

3. The inlet pressure controlled valve according to claim 2, wherein the adjusting seat (5) is connected to the guide sleeve (4) through a lock nut (10);

the outer wall and the inner wall of the locking nut (10) are both provided with threads, and the threads on the outer wall of the locking nut (10) are matched and connected with the threads on the inner wall of the guide sleeve (4);

the thread of the inner wall of the locking nut (10) is matched and connected with the thread at one end, far away from the spring (6), of the adjusting seat (5) and used for fixing and adjusting the relative position between the adjusting seat (5) and the guide sleeve (4).

4. The inlet pressure controlled opening and closing valve according to claim 3, characterized in that a second sealing ring (9) is arranged between the locking nut (10) and the outer wall step on the adjusting seat (5) along the axial direction of the guide sleeve (4) for sealing the gap between the adjusting seat (5) and the guide sleeve (4).

5. The inlet pressure controlled valve according to claim 4, wherein the first sealing ring (8) and the second sealing ring (9) are elastic energy storage sealing rings, and the elastic energy storage sealing rings are composed of a shell made of polymer materials and elastic pieces and used for enabling the sealing rings to be tightly attached to the sealing positions.

6. The inlet pressure controlled opening and closing valve of claim 1, wherein the sealing structure comprises: a third sealing ring (11) and an annular sealing projection (12), wherein,

the annular sealing bulge (12) is located inside the outlet shell (2), the outlet channel (14) is peripheral, the third sealing ring (11) is arranged in the end sealing groove at one end of the outlet shell (2) close to the valve core (3), and the third sealing ring (11) corresponds to the annular sealing bulge (12) in position and is used for forming a sealing structure and isolating the inner cavity of the outlet shell (2) and the outlet channel (14).

7. Valve according to claim 1, characterized in that the side wall of the guide sleeve (4) and the side wall of the outlet housing (2) are provided concentrically with a leakage hole (15) for discharging the medium entering the guide sleeve (4).

8. The inlet pressure controlled opening and closing valve according to claim 1, wherein the internal flow passage (16) penetrates through the side wall of the guide sleeve (4) along the axial direction of the guide sleeve (4) and is not communicated with the inner cavity of the guide sleeve (4).

9. The inlet pressure controlled opening and closing valve according to claim 1 is characterized in that a spring seat (13) is fixedly arranged at one end, close to the valve core (3), of the adjusting seat (5) and is used for connecting one end of the spring (6);

one end, close to the adjusting seat (5), of the valve core (3) is provided with a blind hole, and the other end of the spring (6) extends into the blind hole and is used for radial limiting when the spring (6) stretches.

10. Valve according to claim 1, characterized in that the connection between the inlet housing (1) and the outlet housing (2) is provided with a fourth sealing ring (17) to prevent leakage of medium from the connection.