Normally open valve device and engine

Abstract

The present disclosure provides a normally open valve device and an engine, wherein the normally open valve device comprises: a shell assembly, formed with a first matching wall, an inlet and an outlet, the first matching wall being located between the inlet and the outlet; a valve core assembly, formed with a second matching wall, the second matching wall being located between the inlet and the first matching wall, the valve core assembly being movably arranged in the shell assembly so that the second matching wall can approach or move away from the first matching wall; an elastic assembly, arranged in the shell assembly, for applying a force to the valve core assembly in a direction from the first matching wall to the second matching wall; wherein the valve core assembly has a conducting position and a shutoff position; when the valve core assembly is in the conducting position, the first matching wall is separated from the second matching wall so that the inlet is connected to the outlet; when the valve core assembly is in the shutoff position, the first matching wall abuts against the second matching wall so that the inlet is cut off from the outlet.

Description

Technical Field

[0001] The present disclosure relates to the technical field of power equipment, and in particular to a normally open valve device and an engine. Background Art

[0002] The pre-cooling temperature of a liquid rocket engine before ignition has an important impact on successful ignition. Before ignition, the turbine pump bearing cavity of the aforementioned engine needs to be pre-cooled by discharging low-temperature propellant for convective heat transfer, and after ignition, the corresponding discharge pipeline needs to be closed to prevent propellant leakage.

[0003] In the related art, cryogenic solenoid valves are often used to control the on-off of the exhaust pipeline. Accordingly, the cryogenic solenoid valve remains open under low pressure difference conditions before ignition, and closes according to the timing command under high pressure difference conditions during the subsequent ignition process. However, since the aforementioned working conditions belong to ultra-low temperature conditions, the actual ambient temperature of the cryogenic solenoid valve often exceeds its operating temperature range, resulting in low operating stability and reliability of the cryogenic solenoid valve, which is likely to have an adverse effect on the ignition process of the liquid rocket engine. Summary of the invention

[0004] The present disclosure aims to solve at least one of the technical problems existing in the prior art or related art.

[0005] In view of this, according to a first aspect of an embodiment of the present disclosure, a normally open valve device is provided, comprising:

[0006] A housing assembly is formed with a first matching wall, an inlet and an outlet, wherein the first matching wall is located between the inlet and the outlet;

[0007] The valve core assembly is formed with a second matching wall, the second matching wall is located between the inlet and the first matching wall, and the valve core assembly is movably arranged in the housing assembly so that the second matching wall can be close to or away from the first matching wall;

[0008] An elastic component, disposed in the housing component, for applying a force to the valve core component in a direction from the first matching wall to the second matching wall;

[0009] Among them, the valve core assembly has a conducting position and a shutoff position; when the valve core assembly is in the conducting position, the first mating wall and the second mating wall are separated so that the inlet is connected to the outlet; when the valve core assembly is in the shutoff position, the first mating wall and the second mating wall abut against each other so that the inlet and the outlet are cut off.

[0010] In a feasible implementation manner, the valve core assembly includes:

[0011] A first tube body is movably disposed in the shell assembly, a first flow hole and a second flow hole are formed on a tube wall of the first tube body, and a flow channel is formed between the tube wall of the first tube body and the inner wall of the shell assembly, and the flow channel is connected between the first flow hole and the second flow hole;

[0012] A partition is disposed in the first tube body to separate a first blind hole and a second blind hole in the first tube body, the first blind hole is connected between the inlet and the first flow hole, the second blind hole is used to connect between the outlet and the second flow hole, and a second matching wall is formed on one side of the partition facing the outlet;

[0013] Wherein, when the valve core assembly is in the conducting position, the second blind hole is connected between the flow outlet and the second flow hole; when the valve core assembly is in the cut-off position, the flow outlet and the second flow hole are cut off.

[0014] In a feasible implementation manner, the partition includes:

[0015] A partition layer is arranged in the first tube body portion to separate the first blind hole and the second blind hole in the first tube body portion;

[0016] The sealing layer is arranged on the side of the partition layer facing the outlet, the second matching wall is formed on the sealing layer, and the sealing layer is suitable for sealingly matching with the first matching wall.

[0017] In a feasible embodiment, the housing assembly includes:

[0018] A first housing portion is formed with an inlet;

[0019] The second housing portion is sleeved on the first housing portion;

[0020] A second tube body portion is disposed through the first shell portion, the second tube body portion is arranged opposite to the inlet and is formed with an outlet;

[0021] One end of the second tube body is located in the second blind hole and is formed with a first matching wall.

[0022] In a feasible implementation manner, the second tube body portion includes:

[0023] A matching pipe section, one end of which is formed with a first matching wall;

[0024] The outflow pipe section is connected to the other end of the matching pipe section;

[0025] Wherein, along the direction from the second matching wall to the first matching wall, the wall thickness of the matching pipe section increases.

[0026] In a feasible embodiment, when the valve core assembly is in the conduction position, a throttling gap is formed between the second mating wall and the first mating wall, the throttling gap is connected between the second flow hole and the outlet, and the conduction area of ​​the throttling gap is smaller than the conduction area of ​​the second flow hole.

[0027] In a feasible implementation manner, the housing assembly further includes:

[0028] The sealing gasket is arranged between the first shell part and the second shell part.

[0029] In a feasible embodiment, the first housing portion and the second housing portion are threadedly connected, the first housing portion and the second housing portion enclose a mounting groove, the mounting groove is arranged around the outer peripheral wall of the first housing portion and is located at one end of the thread of the first housing portion, and the sealing gasket is arranged in the mounting groove;

[0030] The sealing gasket is made of a compressible material, and the volume of the sealing gasket in a free state is greater than the volume of the installation groove.

[0031] In a feasible implementation manner, an installation space is enclosed between the valve core assembly and the housing assembly, the elastic assembly is disposed in the installation space, and the installation space is suitable for being connected to the outlet.

[0032] According to a second aspect of an embodiment of the present disclosure, an engine is provided, comprising:

[0033] A normally open valve device as proposed in any one of the first aspects above.

[0034] The above description is only an overview of the technical solution provided by the present disclosure. In order to more clearly understand the technical means of the present disclosure, it can be implemented according to the contents of the specification. In order to make the above and other features and effects of the present disclosure more obvious and easy to understand, the implementation methods of the present disclosure are specifically listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the exemplary embodiments below. The accompanying drawings are only for the purpose of illustrating exemplary embodiments and are not to be considered as limiting the present disclosure. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0036] Figure 1 A schematic structural diagram of a normally open valve device according to an embodiment of the present disclosure;

[0037] Figure 2 A schematic application scenario diagram of a normally open valve device according to an embodiment of the present disclosure.

[0038] in, Figure 1 and Figure 2 The corresponding relationship between the reference numerals and the component names is as follows:

[0039] 100 housing assembly; 200 valve core assembly; 300 elastic assembly;

[0040] 110 first housing portion; 120 second housing portion; 130 second tube portion; 140 sealing pad;

[0041] 210 first pipe body part; 220 partition part;

[0042] 131 matching pipe section; 132 outflow pipe section;

[0043] 101 first matching wall; 102 inlet; 103 outlet; 104 installation space;

[0044] 201 second matching wall; 202 first flow hole; 203 second flow hole; 204 flow channel; 205 first blind hole; 206 second blind hole; 207 throttling gap. DETAILED DESCRIPTION

[0045] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0046] The pre-cooling temperature of a liquid rocket engine before ignition has an important impact on successful ignition. Before ignition, the turbine pump bearing cavity of the aforementioned engine needs to be pre-cooled by discharging low-temperature propellant for convective heat transfer, and after ignition, the corresponding discharge pipeline needs to be closed to prevent propellant leakage.

[0047] In the related art, cryogenic solenoid valves are often used to control the on-off of the exhaust pipeline. Accordingly, the cryogenic solenoid valve remains open under low pressure difference conditions before ignition, and is closed according to the timing command under high pressure difference conditions during the subsequent ignition process. However, since the aforementioned working conditions belong to ultra-low temperature conditions, the actual ambient temperature of the cryogenic solenoid valve often exceeds its operating temperature range, making it difficult for the electrical components in the cryogenic solenoid valve to operate stably, resulting in low operating stability and reliability of the cryogenic solenoid valve, which is likely to have an adverse effect on the ignition process of the liquid rocket engine.

[0048] To solve at least one of the technical problems existing in the above-mentioned prior art or related technology, such as Figure 1 and Figure 2As shown, according to the first aspect of the embodiment of the present disclosure, a normally open valve device is proposed, including: a housing component 100, formed with a first matching wall 101, an inlet 102 and an outlet 103, the first matching wall 101 is located between the inlet 102 and the outlet 103; a valve core component 200, formed with a second matching wall 201, the second matching wall 201 is located between the inlet 102 and the first matching wall 101, the valve core component 200 is movably arranged in the housing component 100, so that the second matching wall 201 can be close to or away from the first matching wall 101; an elastic component 300, arranged in the housing assembly 100, is used to apply a force to the valve core assembly 200 in the direction from the first matching wall 101 to the second matching wall 201; wherein the valve core assembly 200 has a conducting position and a shutoff position; when the valve core assembly 200 is in the conducting position, the first matching wall 101 is separated from the second matching wall 201 so that the inlet 102 is connected to the outlet 103; when the valve core assembly 200 is in the shutoff position, the first matching wall 101 is abutted against the second matching wall 201 so that the inlet 102 and the outlet 103 are cut off.

[0049] The normally open valve device provided by the present disclosure includes the aforementioned housing assembly 100, the valve core assembly 200 and the elastic assembly 300; in practical applications, the aforementioned normally open valve device can be used as a component of a liquid rocket engine, for example, to be installed on the aforementioned discharge pipeline and to control the on-off state of the aforementioned discharge pipeline. Based on the aforementioned setting, the aforementioned valve core assembly 200 can be located between the aforementioned inlet 102 and the aforementioned outlet 103; accordingly, as Figure 2As shown, when fluid flows into the aforementioned inlet 102, the side of the valve core component 200 opposite to the aforementioned inlet 102 can come into contact with the fluid and can be subjected to the pressure exerted by the fluid. In the case where the pressure exerted by the fluid on the valve core component 200 is relatively low, the valve core component 200 can be maintained in the aforementioned conducting position under the force exerted by the aforementioned elastic component 300, so that the aforementioned first matching wall 101 and the aforementioned second matching wall 201 are separated from each other, so that the first matching wall 101 and the second matching wall 201 form a gap suitable for fluid circulation, and the aforementioned gap is connected between the aforementioned inlet 102 and the aforementioned outlet 103, and then the fluid can flow to the aforementioned outlet 103 through the aforementioned gap, so that the normally open valve device remains in the conducting state; in the case where the fluid exerts a relatively high pressure on the valve core component 200, the valve core component 200 can overcome the elastic component under the pressure exerted by the aforementioned fluid. 300, and generates movement relative to the shell assembly 100, so that the aforementioned first matching wall 101 approaches the aforementioned second matching wall 201 until the two abut against each other, thereby the aforementioned gap formed by the first matching wall 101 and the second matching wall 201 is eliminated, the aforementioned inlet 102 and the aforementioned outlet 103 are cut off, and the fluid cannot flow to the aforementioned outlet 103, and the normally open valve device is correspondingly in a cut-off state; based on this, the normally open valve device can automatically switch from the aforementioned on state to the cut-off state after the pressure of the inflowing fluid increases to a certain level, or automatically switch from the aforementioned cut-off state to the on state after the pressure of the inflowing fluid decreases to a certain level, without relying on electrical components to control the operating state of the normally open valve device, which can improve the adaptability of the normally open valve device to low-temperature and ultra-low-temperature operating conditions, and is conducive to the normally open valve device to perform stable and reliable on-off control of the corresponding pipeline.

[0050] It should be noted that Figure 2 The dashed line with an arrow in the middle is used to schematically indicate the flow direction of the aforementioned fluid.

[0051] It can be understood that, taking the application of the normally open valve device to the exhaust pipe of the liquid rocket engine as an example, the liquid rocket engine can be but not limited to a liquid oxygen-methane engine, the exhaust pipe is used to connect the inner and outer sides of the turbine pump bearing cavity of the liquid rocket engine, the normally open valve device can be arranged on the exhaust pipe, and the inlet 102 and the outlet 103 can be arranged along the exhaust direction of the propellant. Based on the above arrangement, under the low pressure difference condition before the ignition of the liquid rocket engine, the pressure difference between the fluid pressure at the inlet 102 of the normally open valve device and the fluid pressure at the outlet 103 is small, and accordingly, the fluid pressure on the side of the valve core assembly 200 opposite to the aforementioned inlet 102 is also correspondingly small, and the normally open valve device can be maintained in the aforementioned conduction state to allow the propellant to be continuously discharged, thereby achieving precooling of the liquid rocket engine; under the high pressure difference condition during the ignition process of the liquid rocket engine, the pressure difference between the fluid pressure at the inlet 102 of the normally open valve device and the fluid pressure at the outlet 103 is large, and accordingly, the valve core assembly 200 and the aforementioned inlet 1 02 The fluid pressure on the opposite side is also correspondingly larger, and the normally open valve device can automatically switch to the aforementioned cut-off state to stop the discharge of the aforementioned propellant, thereby providing favorable conditions for the successful ignition of the liquid rocket engine; at the same time, compared with the low-temperature solenoid valve in the related technology, the normally open valve device provided in the embodiment of the present disclosure does not need to be configured with an electrical device for controlling the position switching of the valve core assembly 200, thereby reducing the limitation of the aforementioned electrical device on the working temperature of the normally open valve device, making the normally open valve device more suitable for use under low temperature and ultra-low temperature conditions, which is beneficial to provide a guarantee for the stable and reliable switching of the on and off states of the aforementioned discharge pipeline, and improving the ignition success rate of the liquid rocket engine.

[0052] It can be understood that, since the second matching wall 201 is located between the inlet 102 and the first matching wall 101, and the valve core assembly 200 can correspondingly make the second matching wall 201 close to or away from the first matching wall 101 during the movement relative to the housing assembly 100, the fluid pressure on the side of the valve core assembly 200 opposite to the aforementioned inlet 102 can make the valve core assembly 200 have a tendency to move away from the aforementioned inlet 102, thereby making the second matching wall 201 have a tendency to move towards the first matching wall 101; due to the elastic component 3 00 is used to apply a force to the valve core assembly 200 in the direction from the first matching wall 101 to the second matching wall 201, and the valve core assembly 200 can correspondingly make the second matching wall 201 approach or move away from the first matching wall 101 during the movement relative to the housing assembly 100, so that the force applied by the elastic assembly 300 to the valve core assembly 200 is opposite to the effect of the aforementioned fluid pressure, which can make the valve core assembly 200 have a tendency to move in the direction close to the aforementioned inlet 102, and then make the second matching wall 201 have a tendency to move in the direction away from the first matching wall 101.

[0053] It is understandable that if Figure 1 and Figure 2 As shown, the elastic component 300 may include a spring, the two ends of which are respectively connected to the valve core component 200 and the housing component 100, and the valve core component 200 is located between the spring and the inlet 102. The spring coefficient of the spring may be selected according to actual needs, and is not limited here.

[0054] It can be understood that the aforementioned fluid can be but is not limited to the aforementioned propellant.

[0055] In some feasible examples, the aforementioned valve core assembly 200 can be a roughly rotating body structure, the inner wall shape of the aforementioned shell assembly 100 is adapted to the outer wall shape of the aforementioned valve core assembly 200, and the outer wall of the aforementioned valve core assembly 200 and the inner wall of the aforementioned shell assembly 100 are guided and slidably matched, so that the aforementioned valve core assembly 200 can slide in the direction from the aforementioned inlet 102 to the aforementioned outlet 103 or in the direction from the aforementioned outlet 103 to the aforementioned inlet 102.

[0056] In some feasible examples, the housing assembly 100 is formed with an inlet nozzle structure, the inlet port 102 is formed in the inlet nozzle structure, and the inlet nozzle structure is formed with a first connecting thread, and the first connecting thread is used to connect an external pipeline.

[0057] like Figure 1 and Figure 2As shown, in some examples, the valve core assembly 200 includes: a first tube body 210, which is movably arranged in the housing assembly 100, and the tube wall of the first tube body 210 is provided with a first flow hole 202 and a second flow hole 203, and the tube wall of the first tube body 210 and the inner wall of the housing assembly 100 form a flow channel 204, and the flow channel 204 is connected between the first flow hole 202 and the second flow hole 203; a partition 220, which is arranged in the first tube body 210 to separate the first blind hole 205 and the first blind hole 206 in the first tube body 210. Two blind holes 206, the first blind hole 205 is connected between the inlet 102 and the first flow hole 202, the second blind hole 206 is used to connect between the outlet 103 and the second flow hole 203, and the partition 220 is formed with a second matching wall 201 on the side facing the outlet 103; wherein, when the valve core assembly 200 is in the conducting position, the second blind hole 206 is connected between the outlet 103 and the second flow hole 203; when the valve core assembly 200 is in the cut-off position, the outlet 103 and the second flow hole 203 are cut off.

[0058] In this technical solution, the valve core assembly 200 may include the aforementioned first tube body portion 210 and the aforementioned partition portion 220; based on the aforementioned arrangement, during use, the valve core assembly 200 may utilize the aforementioned first blind hole 205 to preferentially access the fluid, and accordingly, after the aforementioned fluid enters the first blind hole 205, it may flow to the aforementioned second blind hole 206 through the aforementioned first flow hole 202, the flow channel 204, and the second flow hole 203 at one time; when the pressure exerted by the aforementioned fluid on the aforementioned valve core assembly 200 is relatively small, the aforementioned valve core assembly 200 may be maintained at At the aforementioned conduction position, accordingly, the fluid can further flow to the outlet 103 through the second blind hole 206; when the pressure exerted by the aforementioned fluid on the aforementioned valve core assembly 200 is relatively large, the aforementioned valve core assembly 200 can overcome the effect of the elastic assembly 300 under the pressure exerted by the fluid, and move in a direction away from the inlet 102, so that the first matching wall 101 abuts against the second matching wall 201, so that the outlet 103 and the second flow hole 203 cannot be connected through the aforementioned second blind hole 206, so that the normally open valve device can cut off the pipeline in which it is located.

[0059] It can be understood that, based on the aforementioned setting of the technical solution, the second mating wall 201 can be formed on the bottom wall of the aforementioned second blind hole 206, so that when the second mating wall 201 abuts against the first mating wall 101 of the shell assembly 100, at least part of the shell assembly 100 will be located in the second blind hole 206, thereby reducing the space requirements of the valve core assembly 200 and the shell assembly 100 and improving the structural compactness of the normally open valve device.

[0060] It can be understood that the aforementioned first blind hole 205 and the aforementioned second blind hole 206 are arranged corresponding to the two ends of the aforementioned first tube body portion 210 in the axial direction, respectively, and the aforementioned partition portion 220 is located between the two ends of the aforementioned first tube body portion 210 in the axial direction; accordingly, the axial direction of the aforementioned first tube body portion 210 can be arranged along the direction from the aforementioned inlet 102 to the aforementioned outlet 103.

[0061] It can be understood that the first flow hole 202 and the second flow hole 203 are arranged at intervals along the axial direction of the first tube body portion 210 .

[0062] It is understandable that the outer peripheral wall of the aforementioned first tube body 210 may be provided with an arc-shaped groove, and the aforementioned flow passage 204 may include the aforementioned arc-shaped groove. Exemplarily, the number of the aforementioned first flow hole 202 and the aforementioned second flow hole 203 may both be multiple, and the multiple first flow holes 202 and the multiple second flow holes 203 are arranged at intervals along the axial direction of the first tube body 210, respectively. The number of the aforementioned first flow holes 202 and the aforementioned second flow holes 203 may be the same, and the specific number may be set in combination with actual needs, for example, it may be 2, 3, 4 or 5, etc.; accordingly, the number of the aforementioned arc-shaped grooves may also be multiple, and the number of the first flow holes 202, the second flow holes 203 and the flow passage 204 is the same and one-to-one corresponding, that is, each arc-shaped groove is connected between a group of first flow holes 202 and the second flow holes 203, and multiple arc-shaped grooves may be opened at intervals along the axial direction of the first tube body 210.

[0063] It is understandable that, considering the smoothness of the fluid flowing from the inlet 102 to the second blind hole 206, the first blind hole 205, the first flow hole 202, the flow channel 204 and the second flow hole 203 may not be throttled.

[0064] In some feasible examples, the aforementioned partition portion 220 and the aforementioned first tube portion 210 are an integrated structure.

[0065] In some examples, the partition portion 220 includes: a partition layer, disposed in the first tube body portion 210 to separate the first blind hole 205 and the second blind hole 206 in the first tube body portion 210; a sealing layer, disposed on the side of the partition layer facing the outlet 103, the second matching wall 201 is formed in the sealing layer, and the sealing layer is suitable for sealing with the first matching wall 101.

[0066] In this technical solution, the partition portion 220 may include the aforementioned partition layer and the aforementioned sealing layer; based on the aforementioned arrangement, when the first matching wall 101 abuts against the second matching wall 201, the sealing fit between the first matching wall 101 and the second matching wall 201 can be ensured, thereby preventing the fluid from flowing into the second blind hole 206 through the second flow hole 203, and then further flowing into the aforementioned outlet 103 through the gap between the first matching wall 101 and the second matching wall 201, which is beneficial to ensuring the stage effect of the normally open valve device on the pipeline in the cut-off state.

[0067] In some feasible examples, the sealing layer may be a plastic sealing layer, a metal sealing layer or a rubber sealing layer. For example, the sealing layer may be a fluoroplastic sealing layer, which is beneficial to further improve the sealing effect between the sealing layer and the first matching wall 101 under low temperature and high pressure conditions.

[0068] like Figure 1 and Figure 2 As shown, in some examples, the shell assembly 100 includes: a first shell portion 110, which is formed with an inlet 102; a second shell portion 120, which is sleeved on the first shell portion 110; a second tube body portion 130, which is passed through the first shell portion 110, and the second tube body portion 130 is arranged opposite to the inlet 102 and is formed with an outlet 103; wherein one end of the second tube body portion 130 is located in the second blind hole 206 and is formed with a first matching wall 101.

[0069] In this technical solution, the housing assembly 100 includes the aforementioned first housing portion 110, the second housing portion 120 and the second tube portion 130; based on the aforementioned arrangement, when the valve core assembly 200 is located at the aforementioned conduction position, the aforementioned second matching wall 201 can open one end of the second tube portion 130 located in the aforementioned second blind hole 206, so as to make the flow outlet 103 conduction, and accordingly, after the fluid flows into the second blind hole 206 through the second flow hole 203, it can further flow into the flow outlet 103 through the gap between the first matching wall 101 and the second matching wall 201; when the valve core assembly 200 is located at the aforementioned cut-off position, the second matching wall 201 covers the front The second tube body portion 130 is located at one end of the second blind hole 206, so that the outlet 103 is cut off. Accordingly, since the gap between the first matching wall 101 and the second matching wall 201 is eliminated, after the fluid flows into the second blind hole 206 through the second flow hole 203, it cannot flow into the outlet 103 through the aforementioned gap, and thus the normally open valve device can cut off the pipeline in which it is located; and based on the aforementioned arrangement, the space requirements of the valve core assembly 200 and the housing assembly 100 can be reduced, the structural compactness of the normally open valve device can be improved, and the structural complexity of the normally open valve device can be reduced, which is conducive to reducing the manufacturing cost and use cost of the normally open valve device.

[0070] It can be understood that the first shell part 110 and the second shell part 120 can be connected in a detachable manner to facilitate opening or closing the internal space of the shell assembly 100, facilitate maintenance and replacement of the valve core assembly 200 and the elastic assembly 300, and facilitate cleaning and maintenance of the internal space of the shell assembly 100.

[0071] In some feasible examples, the portion of the second pipe body portion 130 located outside the second shell portion 120 may be formed with an outlet nozzle structure, and the outlet nozzle structure may be formed with a second connecting thread, and the second connecting thread is used to connect to an external pipeline.

[0072] In some feasible examples, the first shell portion 110 and the second shell portion 120 are both substantially in the form of a rotating body structure.

[0073] In some feasible examples, the second tube portion 130 and the second housing portion 120 are an integrated structure.

[0074] like Figure 1 and Figure 2 As shown, in some examples, the second tube body portion 130 includes: a mating tube segment 131, one end of which is formed with a first mating wall 101; an outlet tube segment 132, connected to the other end of the mating tube segment 131; wherein, along the direction from the second mating wall 201 to the first mating wall 101, the tube wall thickness of the mating tube segment 131 increases.

[0075] In this technical solution, the second tube body portion 130 may include the aforementioned mating pipe section 131 and the aforementioned outlet pipe section 132; based on the aforementioned arrangement, the end of the second tube body portion 130 located in the aforementioned second blind hole 206 may have a blade-like structure, thereby being able to increase the specific pressure between the first mating wall 101 and the second mating wall 201 when they are in contact, which is beneficial to improving the sealing mating effect of the first mating wall 101 and the second mating wall 201 when they are in contact, and preventing the fluid from leaking out of the outlet 103 when the valve core assembly 200 is in the cut-off position.

[0076] like Figure 1 As shown, in some examples, when the valve core assembly 200 is in the conducting position, a throttling gap 207 is formed between the second mating wall 201 and the first mating wall 101, and the throttling gap 207 is connected between the second flow hole 203 and the outlet 103, and the conducting area of ​​the throttling gap 207 is smaller than the conducting area of ​​the second flow hole 203.

[0077] In this technical solution, when the valve core assembly 200 is in the conducting position, the gap between the second matching wall 201 and the first matching wall 101 can be set as a throttling gap 207, that is, the conducting area of ​​the aforementioned gap is smaller than the conducting area of ​​the second flow hole 203, so that when the fluid flows from the aforementioned second flow hole 203 to the aforementioned throttling gap 207, the aforementioned throttling gap 207 can have a throttling effect on the fluid; based on the aforementioned setting, the resistance of the fluid flowing through the aforementioned throttling gap 207 can be increased, which is beneficial to enhance the sensitivity of the valve core assembly 200 to the fluid pressure, and is beneficial to the valve core assembly 200 to overcome the elastic force of the elastic assembly 300 and move under the action of the fluid pressure.

[0078] It can be understood that, with the length of the throttling gap 207 in the direction away from the second matching wall 201 as the gap width, the conduction area of ​​the throttling gap 207 can be the product of the outer circumference of the second tube body 130 and the gap width.

[0079] It can be understood that the conduction area of ​​the second flow hole 203 is the cross-sectional area of ​​the second flow hole 203 .

[0080] like Figure 1 and Figure 2 As shown, in some examples, the housing assembly 100 further includes a sealing gasket 140 disposed between the first housing portion 110 and the second housing portion 120 .

[0081] In this technical solution, the shell assembly 100 may also include the aforementioned sealing gasket 140; based on the aforementioned configuration, the sealing performance of the shell assembly 100 may be improved, and the risk of fluid leakage through the connection gap between the first shell portion 110 and the second shell portion 120 may be reduced.

[0082] It is understandable that the sealing gasket 140 may be an annular structure, and the sealing gasket 140 is sleeved on the first shell portion 110 and located between the first shell portion 110 and the second shell portion 120 .

[0083] like Figure 1 and Figure 2 As shown, in some examples, the first shell portion 110 and the second shell portion 120 are threadedly connected, and the first shell portion 110 and the second shell portion 120 form a mounting groove, which is arranged around the outer peripheral wall of the first shell portion 110 and is located at one end of the thread of the first shell portion 110, and the sealing gasket 140 is disposed in the mounting groove; wherein the sealing gasket 140 is made of a compressible material, and the volume of the sealing gasket 140 in a free state is larger than the volume of the mounting groove.

[0084] In this technical solution, the aforementioned sealing gasket 140 can be arranged in the aforementioned mounting groove, and can be made of a compressible material, and at the same time, the volume of the sealing gasket 140 in a free state can be set to be larger than the volume of the mounting groove; based on the aforementioned setting, on the one hand, the sealing gasket 140 can be in a compressed state when located in the aforementioned mounting groove, and the correspondence between the sealing gasket 140 and the threaded fitting parts of the first shell part 110 and the second shell part 120 can be improved, which is beneficial to enhance the sealing effect of the sealing gasket 140 on the connecting gap between the first shell part 110 and the second shell part 120; on the other hand, the tightness of the fitting between the first shell part 110, the second shell part 120 and the sealing gasket 140 can be improved, and the risk of movement of the sealing gasket 140 can be reduced, which is beneficial to further improve the sealing reliability of the sealing gasket 140.

[0085] It is understandable that by providing a step structure on the first shell portion 110 and / or the second shell portion 120 , the first shell portion 110 and the second shell portion 120 can be connected to each other to form the aforementioned installation groove.

[0086] It can be understood that the first housing portion 110 is formed with an external thread, and the second housing portion 120 is formed with an internal thread that matches the external thread of the first housing portion 110 .

[0087] It can be understood that the aforementioned free state refers to the state when the sealing gasket 140 is not affected by external force; in practical applications, the sealing gasket 140 can be firstly arranged on the aforementioned first shell part 110, and then the second shell part 120 can be threadedly connected to the first shell part 110, so that in the process of connecting the second shell part 120, the first shell part 110 and the second shell part 120 squeeze the aforementioned sealing gasket 140 to compress the sealing gasket 140.

[0088] Exemplarily, the aforementioned compressible material may be, but is not limited to, graphite or rubber.

[0089] like Figure 1 and Figure 2 As shown, in some examples, the valve core assembly 200 and the housing assembly 100 enclose an installation space 104 , the elastic assembly 300 is disposed in the installation space 104 , and the installation space 104 is suitable for being connected to the outlet 103 .

[0090] In this technical solution, the valve core assembly 200 and the housing assembly 100 can enclose an installation space 104, and the elastic assembly 300 can be arranged in the aforementioned installation space 104, and the installation space 104 is suitable for being connected to the outlet 103; based on the aforementioned arrangement, on the one hand, a relatively stable space can be defined inside the housing assembly 100 for installing the elastic assembly 300, thereby improving the installation stability and reliability between the elastic components, providing a guarantee for the elastic assembly 300 to output a stable force, and being conducive to improving the structural compactness of the normally open valve device; on the other hand, In terms of the above-mentioned installation space 104, since the above-mentioned installation space 104 is defined by the above-mentioned shell assembly 100 and the above-mentioned valve core assembly 200, the volume of the installation space 104 will change during the movement of the valve core assembly 200. By arranging the installation space 104 to be suitable for connecting to the outlet 103, the fluid in the installation space 104 can be discharged through the outlet 103 when the volume of the installation space 104 changes, so as to avoid the fluid in the installation space 104 hindering the movement of the valve core assembly 200, which is beneficial to ensure the stable and reliable operation of the normally open valve assembly.

[0091] It is understandable that when the first matching wall 101 is separated from the second matching wall 201 , the aforementioned installation space 104 is connected to the outlet 103 .

[0092] According to a second aspect of an embodiment of the present disclosure, an engine is provided, comprising: a normally open valve device as provided in any one of the first aspects above.

[0093] Since the engine provided by the present disclosure includes the normally open valve device as proposed in any one of the first aspects above, it has all the beneficial effects of the normally open valve device, which will not be elaborated here.

[0094] In the present disclosure, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise expressly defined. The terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to the specific circumstances.

[0095] In the description of the present disclosure, it is necessary to understand that the directions or positional relationships indicated by the terms "up", "down", "left", "right", "front", "back", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be understood as a limitation on the present disclosure.

[0096] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0097] The above are only preferred embodiments of the present disclosure and are not intended to limit the present disclosure. For those skilled in the art, the present disclosure may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A normally open valve device, characterized in that: include: A housing assembly is formed with a first matching wall, an inlet and an outlet, wherein the first matching wall is located between the inlet and the outlet; A valve core assembly is formed with a second matching wall, the second matching wall is located between the inlet and the first matching wall, and the valve core assembly is movably arranged in the housing assembly so that the second matching wall can be close to or away from the first matching wall; An elastic component, disposed in the housing component, for applying a force to the valve core component in a direction from the first matching wall to the second matching wall; Wherein, the valve core assembly has a conduction position and a cutoff position; when the valve core assembly is in the conduction position, the first matching wall is separated from the second matching wall so that the inlet is connected to the outlet; when the valve core assembly is in the cutoff position, the first matching wall is abutted against the second matching wall so that the inlet and the outlet are cut off.

2. The normally open valve device according to claim 1, characterized in that: The valve core assembly comprises: A first tube body portion is movably disposed in the shell assembly, a first flow hole and a second flow hole are formed on a tube wall of the first tube body portion, and a flow channel is formed between the tube wall of the first tube body portion and the inner wall of the shell assembly, and the flow channel is connected between the first flow hole and the second flow hole; a partition, disposed in the first tube body portion to separate a first blind hole and a second blind hole in the first tube body portion, wherein the first blind hole is connected between the inlet and the first flow hole, and the second blind hole is used to connect between the outlet and the second flow hole, and the second matching wall is formed on one side of the partition facing the outlet; Wherein, when the valve core assembly is in the conducting position, the second blind hole is connected between the flow outlet and the second flow hole; when the valve core assembly is in the cut-off position, the flow outlet and the second flow hole are cut off.

3. The normally open valve device according to claim 2, characterized in that: The partition comprises: a partition layer, arranged in the first tube body portion, so as to separate the first tube body portion into a first blind hole and a second blind hole; The sealing layer is arranged on the side of the partition layer facing the outlet, the second matching wall is formed on the sealing layer, and the sealing layer is suitable for sealingly matching with the first matching wall.

4. The normally open valve device according to claim 2, characterized in that: The housing assembly comprises: A first housing portion, formed with the inlet; A second housing portion, sleeved on the first housing portion; a second tube body portion, which is disposed through the first shell portion, and the second tube body portion is arranged opposite to the inlet and is formed with the outlet; One end of the second tube body is located in the second blind hole and is formed with the first matching wall.

5. The normally open valve device according to claim 4, characterized in that: The second tube body portion comprises: A matching pipe section, one end of which is formed with the first matching wall; an outflow pipe section connected to the other end of the matching pipe section; Wherein, along the direction from the second matching wall to the first matching wall, the wall thickness of the matching pipe section increases.

6. The normally open valve device according to claim 4, characterized in that: When the valve core assembly is in the conduction position, a throttling gap is formed between the second mating wall and the first mating wall, the throttling gap is connected between the second flow hole and the outlet, and the conduction area of ​​the throttling gap is smaller than the conduction area of ​​the second flow hole.

7. The normally open valve device according to claim 4, characterized in that: The housing assembly further comprises: A sealing gasket is disposed between the first shell portion and the second shell portion.

8. The normally open valve device according to claim 7, characterized in that: The first housing portion and the second housing portion are threadedly connected, the first housing portion and the second housing portion enclose a mounting groove, the mounting groove is arranged around the outer peripheral wall of the first housing portion and is located at one end of the thread of the first housing portion, and the sealing gasket is arranged in the mounting groove; Wherein, the sealing gasket is made of a compressible material, and the volume of the sealing gasket in a free state is larger than the volume of the installation groove.

9. The normally open valve device according to any one of claims 1 to 8, characterized in that: An installation space is formed between the valve core component and the housing component, the elastic component is arranged in the installation space, and the installation space is suitable for being connected to the outlet.

10. An engine, characterized in that: include: A normally open valve device as claimed in any one of claims 1 to 9.

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