Pressure measuring valve and pressure measuring device

Abstract

The invention provides a pressure measuring valve. The pressure measuring valve comprises an inlet valve body provided with a first cavity, a valve seat provided with a communicating hole and a second cavity which are arranged in sequence; the first section of the outlet valve body sleeves part of the inlet valve body, and the second section, far away from the inlet valve body, of the outlet valve body is provided with a flow channel, communicated with the second cavity and used for being connected with a storage tank; the valve element is arranged in the second cavity and used for blocking the communicating hole or being separated from the communicating hole so that the communicating hole, the second cavity and the flow channel can communicate in sequence. A plug is arranged in the first cavity in a non-pressure-measuring state, the outer circumferential wall of the plug is connected with the inner circumferential wall of the first cavity in a sealed mode, and a pressure measuring connector is arranged in a pressure measuring state. According to the pressure measuring valve, the tight sealing effect can be guaranteed in the non-pressure-measuring state and the pressure measuring state, the pressure measuring working condition and the pressure measuring requirement of a rocket pressurization conveying system are met, the accuracy of the pressure measuring result is guaranteed, and the carrying capacity of a carrier rocket and the safety of the environment and personnel can also be guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of booster systems for launch vehicles, and more specifically, to a pressure measuring valve and a pressure measuring device. Background Art

[0002] The pressure measuring valve is a commonly used valve in the booster delivery system of a launch vehicle. It is connected to the tank and is used to measure the tank pressure.

[0003] In the non-pressure measuring state, the pressure measuring valve is a one-way valve to prevent the propellant medium in the tank from leaking out through the pressure measuring valve; in the pressure measuring state, a pressure measuring joint is used to connect the pressure measuring valve and the pressure sensor for pressure measurement; after the pressure measurement is completed, the pressure measuring joint is removed and the pressure measuring valve is automatically closed to prevent the propellant medium in the tank from leaking out through the pressure measuring valve.

[0004] However, in the related technology, during the conversion between the non-pressure measuring state and the pressure measuring state, the pressure measuring valve may easily leak the propellant medium, resulting in inaccurate pressure measurement results, and may also easily affect the carrying capacity of the launch vehicle and even threaten the safety of the environment and personnel. Summary of the invention

[0005] In view of the shortcomings of the existing methods, the present application proposes a pressure measuring valve to solve the technical problem existing in the related art that the pressure measuring valve is prone to leaking the propellant medium during the conversion between the non-pressure measuring state and the pressure measuring state.

[0006] In a first aspect, an embodiment of the present application provides a pressure measuring valve, comprising: The inlet valve body comprises a first chamber, a valve seat with a communication hole, and a second chamber which are arranged in sequence; The outlet valve body has a first section sleeved on a portion of the inlet valve body, and a second section away from the inlet valve body has a flow channel and is communicated with the second chamber for connecting to the storage tank; The valve core is disposed in the second chamber and is used to block the communicating hole or be separated from the communicating hole so that the communicating hole, the second chamber and the flow channel are connected in sequence; The first chamber is used to set a plug in a non-pressure measuring state, the outer peripheral wall of the plug is sealed and connected to the inner peripheral wall of the first chamber, and a pressure measuring joint is set in a pressure measuring state.

[0007] In some possible embodiments, one end of the valve core is closed and close to the valve seat, the interior is hollow, and the other end is open and communicated with the flow channel of the second section of the outlet valve body.

[0008] In some possible embodiments, the pressure testing valve further includes: an elastic member; The elastic member is arranged inside the valve core and extends out of the opening at the other end, with one end close to or abutting against the closed end of the valve core and the other end close to or abutting against the second section of the outlet valve body.

[0009] In some possible embodiments, the outer diameter of the first section of the outlet valve body is greater than the outer diameter of the second section of the outlet valve body; A step surface is formed at the connection between the first section and the second section, facing the inlet valve body.

[0010] In some possible embodiments, the opening area of ​​the other end of the valve core is larger than the inlet area of ​​the flow channel in the second section of the outlet valve body.

[0011] In a second aspect, an embodiment of the present application further provides a pressure measuring device, comprising: a pressure measuring joint and any one of the pressure measuring valves provided in the first aspect above; In the pressure measuring state, one end of the pressure measuring joint is connected to the pressure sensor, and the other end is sealed and arranged in the first chamber of the pressure measuring valve.

[0012] In some possible embodiments, under the first pressure condition in the pressure testing state, the other end of the pressure testing connector is configured to move toward the valve seat of the pressure testing valve in the first chamber of the pressure testing valve, and the outer peripheral wall is sealed and connected to the inner peripheral wall of the first chamber.

[0013] In some possible embodiments, the pressure testing joint includes a hollow body portion and a push rod protruding from the body portion, and an end of the push rod faces the valve core of the pressure testing valve; Under the first pressure condition, the push rod passes through the communicating hole of the valve seat until it contacts the valve core; Under the second pressure condition, the push rod pushes the valve core until it contacts or abuts against the second section of the outlet valve body of the pressure testing valve.

[0014] In some possible embodiments, a groove is provided on the outer peripheral wall of the main body; In the pressure measuring state, a sealing member is arranged in the groove so that the outer peripheral wall of the pressure measuring joint is sealedly connected to the inner peripheral wall of the first chamber.

[0015] In some possible embodiments, the pressure measuring joint further includes: a connecting seat, which is vertically fixed in the main body and fixedly connected to the push rod on one side facing the valve core; The connecting seat is provided with a medium hole along the axial direction, which is connected with the pressure sensor and the connecting hole.

[0016] The beneficial technical effects brought about by the technical solution provided by the embodiment of the present application include: The inlet valve body of the pressure measuring valve provided in the embodiment of the present application faces outward, has a connecting hole inside, the flow channel of the outlet valve body is connected to the tank, and the valve core is located in the second chamber 13 between the inlet valve body and the outlet valve body, that is, between the connecting hole and the flow channel. In the non-pressure measuring state, the pressure measuring valve acts as a one-way valve. Under the pressure of the propellant medium (such as liquid fuel or oxidant, etc.) in the tank connected to the flow channel, the valve core blocks the connecting hole to form a first sealing structure to prevent the propellant medium in the tank from leaking out of the connecting hole of the inlet valve body. In addition, the plug seal is arranged in the first chamber of the inlet valve body, located at the end of the connecting hole away from the valve core, which can form a second sealing structure to further prevent the propellant medium from leaking out of the connecting hole.

[0017] During the conversion process between the non-pressure measuring state and the pressure measuring state, that is, during the replacement of the plug and the pressure measuring joint, the valve core always blocks the connecting hole, effectively preventing the propellant medium in the tank from leaking out of the connecting hole. The pressure measuring valve provided by the present application can ensure a tight sealing effect in both the non-pressure measuring state and the pressure measuring state, meet the pressure measuring working conditions and pressure measuring requirements of the rocket booster delivery system, ensure the accuracy of the pressure measuring results, and also ensure the carrying capacity of the launch vehicle, the safety of the environment and personnel.

[0018] Additional aspects and advantages of the present application will be partially given in the following description, which will become apparent from the following description, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which: Figure 1 A schematic diagram of the structure of a pressure measuring valve provided in an embodiment of the present application; Figure 2 A schematic structural diagram of an outlet valve body of a pressure measuring valve provided in an embodiment of the present application; Figure 3 A schematic diagram of the structure of a valve core of a pressure measuring valve provided in an embodiment of the present application; Figure 4 A schematic diagram of the structure of a pressure measuring valve in a non-pressure measuring state provided in an embodiment of the present application; Figure 5 A schematic diagram of the structure of a pressure measuring device provided in an embodiment of the present application under a first pressure condition in a pressure measuring state; Figure 6 A schematic diagram of the structure of a pressure measuring device provided in an embodiment of the present application under a second pressure condition in a pressure measuring state; Figure 7 A schematic diagram of the structure of a pressure measuring joint provided in an embodiment of the present application; Figure 8 for Figure 7Schematic diagram of the cross section at AA'; Fig. 9 for Figure 7 Schematic diagram of the cross section at BB'.

[0020] Reference numerals: 100-pressure measuring valve; 10-inlet valve body; 11-first chamber; 12-valve seat; 121-communication hole; 13-second chamber; 20- outlet valve body; 21- first section; 22- second section; 221- flow channel; 222- stepped surface; 30-valve core; 31-oblique hole 40- elastic member; 200-plug; 300-pressure measuring joint; 31-main body; 310-groove; 32- ejector rod; 33-connecting seat; 330-medium hole. DETAILED DESCRIPTION

[0021] The embodiments of the present application are described below in conjunction with the drawings in the present application. It should be understood that the implementation methods described below in conjunction with the drawings are exemplary descriptions for explaining the technical solutions of the embodiments of the present application and do not constitute a limitation on the technical solutions of the embodiments of the present application.

[0022] Those skilled in the art will appreciate that, unless expressly stated, the "said" and "the" used herein may also include plural forms. It should be further understood that the term "including" used in the specification of the present application refers to the presence of the features, integers, elements and / or components, but does not exclude the implementation of other features, information, data, operations, elements, components and / or combinations thereof supported by the technical field. The term "and / or" used herein refers to at least one of the items defined by the term, for example, "A and / or B" may be implemented as "A", or as "B", or as "A and B".

[0023] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0024] First, the nouns involved in this application are introduced and explained: Pressure measuring valve: connected to the tank in the launch vehicle's booster delivery system to monitor the propellant medium pressure in the tank to ensure that the pressure is within a safe range.

[0025] Pressure measuring joint: A joint that connects the pressure sensor and the pressure measuring valve in the pressure measuring state, so that the pressure sensor monitors the propellant medium pressure in the tank.

[0026] In the related technology, during the conversion between the non-pressure measuring state and the pressure measuring state, the pressure measuring valve may easily leak the propellant medium, resulting in inaccurate pressure measurement results, and may also easily affect the carrying capacity of the launch vehicle and even threaten the safety of the environment and personnel.

[0027] The pressure measuring valve and pressure measuring device provided in this application are intended to solve the above technical problems of related technologies.

[0028] The following is a detailed description of the technical solution of the present application and how the technical solution of the present application solves the above technical problems with specific embodiments. It should be noted that the following implementations can refer to, draw on or combine with each other, and the same terms, similar features and similar implementation steps in different implementations will not be described repeatedly.

[0029] The embodiment of the present application provides a pressure measuring valve 100, the structural schematic diagram of the pressure measuring valve 100 is as shown in FIG. Figure 1 As shown, the pressure testing valve 100 includes an inlet valve body 10 , an outlet valve body 20 and a valve core 30 .

[0030] The inlet valve body 10 has a first chamber 11 , a valve seat 12 with a communication hole 121 , and a second chamber 13 which are arranged in sequence.

[0031] The first section 21 of the outlet valve body 20 is sleeved outside a portion of the inlet valve body 10, and the second section 22 away from the inlet valve body 10 has a flow channel 221 that is communicated with the second chamber 13 for connecting to the storage tank.

[0032] The valve core 30 is disposed in the second chamber 13 to block the communicating hole 121 or to be separated from the communicating hole 121 so that the communicating hole 121, the second chamber 13 and the flow channel 221 are connected in sequence.

[0033] Please refer to Figure 4 The first chamber 11 is used to set a plug 200 in a non-pressure measuring state, and the outer peripheral wall of the plug 200 is sealed and connected to the inner peripheral wall of the first chamber 11. Please refer to Figure 5-Figure 6 The first chamber 11 is used to set a pressure measuring joint 300 under the pressure measuring state.

[0034] The inlet valve body 10 of the pressure measuring valve 100 provided in this embodiment faces outward and has a connecting hole 121 inside. The flow channel 221 of the outlet valve body 20 is connected to the tank. The valve core 30 is enclosed by the inlet valve body 10 and the outlet valve body 20 in the second chamber 13, that is, located between the connecting hole 121 and the flow channel 221. In the non-pressure measuring state, the pressure measuring valve 100 acts as a one-way valve. Under the pressure of the propellant medium (such as liquid fuel or oxidant, etc.) in the tank connected to the flow channel 221, the valve core 30 blocks the connecting hole 121 to form a first sealing structure to prevent the propellant medium in the tank from leaking out of the connecting hole 121 of the inlet valve body 10. In addition, the plug 200 is sealed in the first chamber 11 of the inlet valve body 10, located at the end of the connecting hole 121 away from the valve core 30, and can form a second sealing structure to further prevent the propellant medium from leaking out of the connecting hole 121.

[0035] During the conversion process between the non-pressure measuring state and the pressure measuring state, that is, during the replacement of the plug 200 and the pressure measuring joint 300, the valve core 30 always blocks the connecting hole 121, effectively preventing the propellant medium in the tank from leaking out of the connecting hole 121. The pressure measuring valve 100 provided in the present application can ensure a tight sealing effect in both the non-pressure measuring state and the pressure measuring state, meet the pressure measuring working conditions and pressure measuring requirements of the rocket booster delivery system, ensure the accuracy of the pressure measuring results, and also ensure the carrying capacity of the launch vehicle, the safety of the environment and personnel.

[0036] It can be understood that in the embodiments of the present application, the outer peripheral wall refers to the outer peripheral surface of each structure, and the inner peripheral wall refers to the side wall forming each cavity, space or flow channel 221 and other cavity structures, which can also be understood as the inner surface of each hollow structure.

[0037] Optionally, the first section 21 of the outlet valve body 20 is sleeved outside a portion of the inlet valve body 10 , and the inner circumferential wall of the first section 21 of the outlet valve body 20 and the outer circumferential wall of the inlet valve body 10 are sealed and connected via a sealing member.

[0038] For some possible embodiments, please refer to Figure 1-Figure 3 One end of the valve core 30 is closed and close to the valve seat 12 , the interior is hollow, and the other end is open and communicated with the flow channel 221 of the second section 22 of the outlet valve body 20 .

[0039] In this embodiment, the closed end of the valve core 30 faces the connecting hole 121, and the open end faces the flow channel 221 of the second section 22 of the outlet valve body 20. Under the pressure from the tank connected to the flow channel 221, the valve core 30 blocks the connecting hole 121 to prevent the medium in the tank from leaking out of the connecting hole 121 of the inlet valve body 10. When the closed end of the valve core 30 has a certain pressure, the valve core 30 is pushed to move toward the second section 22 of the outlet valve body 20, so that the connecting hole 121, the second chamber 13 and the flow channel 221 are connected in sequence, so that the pressure measuring medium from the pressure sensor can reach the pressure measuring valve 100, and the propellant medium in the tank will not flow out to the pressure measuring joint 300.

[0040] Optionally, refer to Figure 3 The valve core 30 is hollow inside, and an oblique hole 31 is formed on the outer wall. The oblique hole 31 connects the space inside the valve core 30 with the second chamber 13. When a certain pressure is applied to the closed end of the valve core 30, the valve core 30 is pushed toward the second section 22 of the outlet valve body 20, so that the connecting hole 121, the second chamber 13, the oblique hole 31, the space inside the valve core 30 and the flow channel 221 are connected in sequence.

[0041] For some possible embodiments, please refer to Figure 1 The pressure measuring valve 100 further includes: an elastic member 40 .

[0042] The elastic member 40 is disposed inside the valve core 30 and extends out of an opening at the other end, with one end close to or abutting against the closed end of the valve core 30 and the other end close to or abutting against the second section 22 of the outlet valve body 20 .

[0043] In this embodiment, one end of the elastic member 40 is fixed to the inner side wall of the closed end of the valve core 30, and the other end is fixed to the stepped surface 222 of the second section 22 of the outlet valve body 20 facing the first section 21. Under the elastic force of the elastic member 40 and the pressure in the tank, the valve core 30 blocks the communication hole 121 and is sealed with the valve seat 12.

[0044] Optionally, the elastic member 40 may be a spring fixedly connected to the valve core.

[0045] For some possible embodiments, please refer to Figure 2 The outer diameter of the first section 21 of the outlet valve body 20 is greater than the outer diameter of the second section 22 of the outlet valve body 20 .

[0046] A step surface 222 is formed at the connection between the first section 21 and the second section 22 , facing the inlet valve body 10 .

[0047] In this embodiment, the outer peripheral wall of the outlet valve body 20 is stepped, and the inner peripheral wall is also stepped. The outer diameter of the first section 21 of the outlet valve body 20 is greater than the outer diameter of the second section 22 of the outlet valve body 20, so that a step surface 222 is formed on the inner peripheral wall of the outlet valve body 20, so that one end of the opening of the valve core 30 can be blocked by the step surface 222, thereby preventing the valve core 30 from moving out of the pressure testing valve 100 due to excessive pressure from the pressure testing joint 300.

[0048] In some possible embodiments, the opening area of ​​the other end of the valve core 30 is larger than the inlet area of ​​the flow channel 221 in the second section 22 of the outlet valve body 20 .

[0049] In this embodiment, the flow channel 221 in the second section 22 of the outlet valve body 20 is narrower, which can make the entire pressure testing valve 100 more compact and save space; moreover, the narrow flow channel 221 can reduce the flow inertia of the fluid, so that the pressure testing valve 100 responds to pressure changes faster and facilitates pressure measurement.

[0050] Based on the same inventive concept, the present application also provides a pressure measuring device, the structural diagram of the pressure measuring device is as follows: Figure 5 and Figure 6 As shown, the pressure measuring device includes: a pressure measuring joint 300 and any pressure measuring valve 100 provided in the above embodiments.

[0051] In the pressure measuring state, one end of the pressure measuring joint 300 is connected to a pressure sensor (not shown in the figure), and the other end is sealed and disposed in the first chamber 11 of the pressure measuring valve 100 .

[0052] The pressure measuring device provided in this embodiment includes any of the pressure measuring valves 100 provided in the above embodiments, and the implementation principles are similar, which will not be repeated here. During the conversion process between the non-pressure measuring state and the pressure measuring state, that is, during the replacement of the plug 200 and the pressure measuring joint 300, the valve core 30 always blocks the connecting hole 121, effectively preventing the propellant medium in the tank from leaking out of the connecting hole 121, and also preventing the pressure measuring medium from the pressure sensor from leaking out of the pressure measuring valve 100. The pressure measuring valve 100 provided in the present application can ensure a tight sealing effect both in the non-pressure measuring state and in the pressure measuring state, meet the pressure measuring conditions and pressure measuring requirements of the rocket booster conveying system, ensure the accuracy of the pressure measuring results, and also ensure the carrying capacity of the launch vehicle, the safety of the environment and personnel.

[0053] For some possible embodiments, please refer to Figure 5 Under the first pressure condition of the pressure measuring state, the other end of the pressure measuring connector 300 is configured to move toward the valve seat 12 of the pressure measuring valve 100 in the first chamber 11 of the pressure measuring valve 100, and the outer peripheral wall is sealed and connected to the inner peripheral wall of the first chamber 11.

[0054] In this embodiment, under the action of the first pressure condition, the pressure measuring joint 300 moves toward the valve seat 12. During the movement, the outer peripheral wall of the pressure measuring joint 300 is sealed and connected with the inner peripheral wall of the first chamber 11, which can ensure the sealing of the pressure measuring valve 100 and reduce the possibility of the propellant medium in the tank leaking out of the pressure measuring valve 100.

[0055] For some possible embodiments, please refer to Figure 5 , Figure 6 and Figure 7 The pressure testing connector 300 includes a hollow body portion 31 and a push rod 32 protruding from the body portion 31 , and an end of the push rod 32 faces the valve core 30 of the pressure testing valve 100 .

[0056] Please refer to Figure 5 Under the first pressure condition, the push rod 32 passes through the communicating hole 121 of the valve seat 12 until it contacts the valve core 30 .

[0057] Please refer to Figure 6 Under the second pressure condition, the push rod 32 pushes the valve core 30 until it contacts or abuts against the second section 22 of the outlet valve body 20 of the pressure testing valve 100 .

[0058] In this embodiment, the push rod 32 of the pressure measuring joint 300 protrudes toward the valve core 30 and is smaller in size than the connecting hole 121. It can pass through the connecting hole 121 and push open the valve core 30, so that the connecting hole 121, the second chamber 13 and the flow channel 221 are connected in sequence, and then the pressure sensor is connected to the tank through the hollow main body 31.

[0059] For some possible embodiments, please refer to Figure 7 A groove 310 is formed on the outer wall of the main body 31 .

[0060] In the pressure measuring state, a sealing member is disposed in the groove 310 , so that the outer peripheral wall of the pressure measuring joint 300 is sealedly connected to the inner peripheral wall of the first chamber 11 .

[0061] In this embodiment, the groove 310 is used to accommodate a seal, which can be sealed with the outer peripheral wall of the main body 31 of the pressure measuring joint 300 and the inner peripheral wall of the first chamber 11, thereby ensuring the sealing between the pressure measuring valve 100 and the external environment under the pressure measuring state, preventing the propellant medium in the tank and the pressure measuring medium in the main body 31 from leaking out, and ensuring the stability and reliability of the pressurization and delivery system of the launch vehicle.

[0062] Optionally, the axial distance between the seal and the other end of the pressure measuring joint 300 is smaller than the axial distance between the push rod 32 and the valve core 30. This means that when the push rod 32 does not contact the valve core 30, the pressure measuring joint 300 has formed a sealed connection with the inlet valve body 10, effectively ensuring the sealing of the pressure measuring equipment.

[0063] Optionally, each sealing member provided in the embodiment of the present application includes a sealing ring, and each component of the pressure measuring device is cylindrical. The sealing ring is sleeved outside the inlet valve body 10, the plug 200, the main body 31 and other components to form a circumferential seal.

[0064] For some possible embodiments, please refer to Figure 7-Figure 9 The pressure measuring connector 300 further includes: a connecting seat 33 .

[0065] The connecting seat 33 is vertically fixed in the main body 31 , and is fixedly connected to the push rod 32 on one side facing the valve core 30 .

[0066] The connecting seat 33 is provided with a medium hole 330 along the axial direction, which is connected with the pressure sensor and the connecting hole 121 .

[0067] In this embodiment, the connection seat 33 is perpendicular to the axial direction of the main body 31, is disposed in the main body 31, and the outer peripheral wall is fixed to the inner peripheral wall of the main body 31, with one side facing the pressure sensor and the other side facing the valve core 30. The push rod 32 is fixed on the connection seat 33, and the top end protrudes from the main body 31, so as to pass through the communication hole 121 to contact or abut the valve core 30, thereby pushing the valve core 30.

[0068] The connecting seat 33 is provided with a medium hole 330 along the axial direction, which can connect the pressure sensor and the connecting hole 121 to transport the pressure measuring medium to the pressure measuring valve 100 .

[0069] In some possible embodiments, under the second pressure condition, the distance between the valve core 30 and the outlet valve body 20 is no greater than the distance between the main body 31 of the pressure testing joint 300 and the valve seat 12 of the pressure testing valve 100, ensuring that when the main body 31 has not yet contacted the valve seat 12 or just contacts the valve seat 12, the valve core 30 and the stepped surface 222 are smoothly abutted, thereby ensuring the effectiveness and accuracy of the pressure measuring process and avoiding the situation where the main body 31 is blocked by the valve seat 12 and cannot continue to push the valve core 30, thereby affecting the measurement result.

[0070] By applying the embodiments of the present application, at least the following beneficial effects can be achieved: 1. The inlet valve body 10 of the pressure measuring valve 100 provided in the embodiment of the present application faces outward, and has a connecting hole 121 inside. The flow channel 221 of the outlet valve body 20 is connected to the tank, and the valve core 30 is enclosed by the inlet valve body 10 and the outlet valve body 20 in the second chamber 13, that is, located between the connecting hole 121 and the flow channel 221. In the non-pressure measuring state, the pressure measuring valve 100 acts as a one-way valve. Under the pressure of the propellant medium (such as liquid fuel or oxidant, etc.) in the tank connected to the flow channel 221, the valve core 30 blocks the connecting hole 121 to form a first sealing structure to prevent the propellant medium in the tank from leaking out of the connecting hole 121 of the inlet valve body 10. In addition, the plug 200 is sealed in the first chamber 11 of the inlet valve body 10, located at the end of the connecting hole 121 away from the valve core 30, and can form a second sealing structure to further prevent the propellant medium from leaking out of the connecting hole 121.

[0071] During the conversion process between the non-pressure measuring state and the pressure measuring state, that is, during the replacement of the plug 200 and the pressure measuring joint 300, the valve core 30 always blocks the connecting hole 121, effectively preventing the propellant medium in the tank from leaking out of the connecting hole 121. The pressure measuring valve 100 provided in the present application can ensure a tight sealing effect in both the non-pressure measuring state and the pressure measuring state, meet the pressure measuring working conditions and pressure measuring requirements of the rocket booster delivery system, ensure the accuracy of the pressure measuring results, and also ensure the carrying capacity of the launch vehicle, the safety of the environment and personnel.

[0072] 2. In the embodiment of the present application, the outer circumferential wall of the outlet valve body 20 is stepped, and the inner circumferential wall is also stepped. The outer diameter of the first section 21 of the outlet valve body 20 is greater than the outer diameter of the second section 22 of the outlet valve body 20, so that a step surface 222 is formed on the inner circumferential wall of the outlet valve body 20, so that one end of the opening of the valve core 30 can be blocked by the step surface 222, thereby preventing the valve core 30 from moving out of the pressure testing valve 100 due to excessive pressure from the pressure testing joint 300.

[0073] 3. In the embodiment of the present application, under the action of the first pressure condition, the pressure measuring joint 300 moves toward the valve seat 12. During the movement, the outer peripheral wall of the pressure measuring joint 300 is sealed and connected with the inner peripheral wall of the first chamber 11, which can ensure the sealing of the pressure measuring valve 100 and reduce the possibility of the propellant medium in the tank leaking out of the pressure measuring valve 100.

[0074] 4. In the embodiment of the present application, the push rod 32 of the pressure measuring joint 300 protrudes toward the valve core 30 and is smaller in size than the connecting hole 121. It can pass through the connecting hole 121 and push open the valve core 30, so that the connecting hole 121, the second chamber 13 and the flow channel 221 are connected in sequence, and then the pressure sensor is connected to the tank through the hollow main body 31.

[0075] 5. In the embodiment of the present application, the connection seat 33 is perpendicular to the axial direction of the main body 31, is arranged in the main body 31, and the outer peripheral wall is fixed to the inner peripheral wall of the main body 31, one side faces the pressure sensor, and the other side faces the valve core 30. The push rod 32 is fixed on the connection seat 33, and the top end protrudes from the main body 31, so as to pass through the connecting hole 121 to contact or abut the valve core 30, thereby pushing the valve core 30. The connection seat 33 is provided with a medium hole 330 along the axial direction, which can connect the pressure sensor and the connecting hole 121, and deliver the pressure measuring medium to the pressure measuring valve 100.

[0076] In the description of the present application, the directions or positional relationships indicated by words such as "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the exemplary directions or positional relationships shown in the accompanying drawings. They are for the convenience of describing or simplifying the description of the embodiments of the present application, and do not indicate or imply that the referred device or component must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present application.

[0077] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0078] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0079] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0080] The above is only a partial implementation method of the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the technical concept of the scheme of the present application, other similar implementation methods based on the technical ideas of the present application are also within the protection scope of the embodiments of the present application.

Claims

1. A pressure measuring valve, characterized in that: include: The inlet valve body comprises a first chamber, a valve seat with a communication hole, and a second chamber which are arranged in sequence; An outlet valve body, a first section of which is sleeved outside a portion of the inlet valve body, and a second section away from the inlet valve body has a flow channel, which is communicated with the second chamber and is used to connect to the storage tank; a valve core, disposed in the second chamber, for blocking the communicating hole, or being separated from the communicating hole, so that the communicating hole, the second chamber and the flow channel are connected in sequence; The first chamber is used to set a plug in a non-pressure measuring state, the outer peripheral wall of the plug is sealed and connected to the inner peripheral wall of the first chamber, and a pressure measuring joint is set in the pressure measuring state.

2. The pressure measuring valve according to claim 1, characterized in that: One end of the valve core is closed and close to the valve seat, the interior is hollow, and the other end is open and communicated with the flow channel of the second section of the outlet valve body.

3. The pressure measuring valve according to claim 2, characterized in that: Also includes: Elastic parts; The elastic member is arranged inside the valve core and extends out of an opening at the other end, with one end close to or abutting against the closed end of the valve core and the other end close to or abutting against the second section of the outlet valve body.

4. The pressure measuring valve according to claim 1, characterized in that: The outer diameter of the first section of the outlet valve body is greater than the outer diameter of the second section of the outlet valve body; A stepped surface is formed at a connection between the first section and the second section, facing the inlet valve body.

5. The pressure measuring valve according to claim 1, characterized in that: The opening area of ​​the other end of the valve core is larger than the inlet area of ​​the flow channel in the second section of the outlet valve body.

6. A pressure measuring device, characterized in that: include: A pressure testing joint and a pressure testing valve as described in any one of claims 1 to 5 above; In the pressure measuring state, one end of the pressure measuring joint is connected to the pressure sensor, and the other end is sealed and arranged in the first chamber of the pressure measuring valve.

7. The pressure measuring device according to claim 6, characterized in that Under the first pressure condition of the pressure measuring state, the other end of the pressure measuring joint is configured to move toward the valve seat of the pressure measuring valve in the first chamber of the pressure measuring valve, and the outer peripheral wall is sealed and connected to the inner peripheral wall of the first chamber.

8. The pressure measuring device according to claim 7, characterized in that The pressure measuring joint comprises a hollow main body and a push rod protruding from the main body, and an end of the push rod faces the valve core; Under a first pressure condition, the push rod passes through the communicating hole of the valve seat until it contacts the valve core of the pressure testing valve; Under the second pressure condition, the push rod pushes the valve core until it contacts or abuts against the second section of the outlet valve body of the pressure testing valve.

9. The pressure measuring device according to claim 8, characterized in that A groove is provided on the outer peripheral wall of the main body; In the pressure measuring state, a sealing member is arranged in the groove, so that the outer peripheral wall of the pressure measuring joint is sealedly connected to the inner peripheral wall of the first chamber.

10. The pressure measuring device according to claim 8, characterized in that The pressure measuring joint further comprises: a connecting seat, which is vertically fixed in the main body and fixedly connected to the push rod on one side facing the valve core; The connecting seat is provided with a medium hole along the axial direction, connecting the pressure sensor and the connecting hole.

Images