Wide-range dynamic pressure sensor for bore pressure test

Abstract

The utility model relates to the technical field of bore pressure testing, and discloses a wide-range dynamic pressure sensor for bore pressure testing, which comprises a main docking mechanism and four pressure measuring mechanisms, and a mounting mechanism for mounting the four pressure measuring mechanisms is arranged on one side of the main docking mechanism. Four first sealing mechanisms are annularly arranged on the outer side, close to the center, of the mounting mechanism, and second sealing mechanisms which are used for placing four pressure measuring mechanisms and play a sealing role are arranged in the four first sealing mechanisms, so that a stable measuring environment is created for the pressure measuring mechanisms, and the design not only improves the sealing performance of the sensor, but also improves the reliability of the sensor. And the second sealing mechanism further enhances the sealing effect, the first sealing mechanism and the second sealing mechanism are arranged in the first sealing mechanism and are specially used for placing and fixing the pressure measuring mechanism, and the second sealing mechanism can ensure that the pressure measuring mechanism stably works in a high-pressure environment through a complex sealing structure and material selection.

Description

Technical Field

[0001] The utility model relates to the technical field of chamber pressure testing, and in particular to a large-range dynamic pressure sensor used for chamber pressure testing. Background Art

[0002] The large-range dynamic pressure sensor used for chamber pressure testing is specially designed for weapon systems such as guns and cannons. It can accurately measure the high-pressure environment in the chamber when firing. Based on the piezoelectric effect, the sensor converts the pressure wave into an electrical signal to achieve high-precision and high-reliability measurement. Its large-range characteristics meet the testing needs of different weapons, and its fast response ensures the capture of pressure changes. It is widely used in the military industry to evaluate weapon performance, engine testing to monitor working status, and the biomedical field to measure dynamic pressure in the body.

[0003] In the prior art, most of the large-range dynamic pressure sensors for chamber pressure testing adopt an integrated structure. Although the integrated structure achieves compactness and high efficiency, it significantly reduces the accessibility of subsequent maintenance and care. As the use time accumulates, the internal components of the sensor are susceptible to pollution such as dust, corrosive substances, etc., coupled with the aggravation of mechanical wear. If the sensor cannot be disassembled, cleaned and calibrated in time, it will directly lead to sensor performance degradation. The complicated disassembly procedure is not only time-consuming and labor-intensive, but may also cause secondary damage due to improper operation, further aggravating the maintenance problem. Any slight deviation may destroy the sealing integrity, thereby causing deviation in the test data, seriously weakening the accuracy and credibility of the test results. Therefore, personnel in this technical field provide a large-range dynamic pressure sensor for chamber pressure testing to solve the problems raised in the above background technology. Utility Model Content

[0004] The purpose of the utility model is to provide a large-range dynamic pressure sensor for chamber pressure testing, which solves the problem that although the integrated structure achieves compactness and high efficiency, it significantly reduces the accessibility of subsequent maintenance and care. As the use time accumulates, the internal components of the sensor are susceptible to pollution such as dust, corrosive substances, etc., coupled with the aggravation of mechanical wear. If the sensor cannot be disassembled, cleaned and calibrated in time, it will directly lead to sensor performance degradation. The complicated disassembly procedure is not only time-consuming and labor-intensive, but may also cause secondary damage due to improper operation, further aggravating the maintenance problem. Any slight deviation may destroy the sealing integrity, thereby causing deviation in the test data, seriously weakening the accuracy and credibility of the test results.

[0005] The utility model provides the following technical solution: a large-range dynamic pressure sensor for chamber pressure testing, comprising a main docking mechanism and four pressure measuring mechanisms, wherein one side of the main docking mechanism is provided with a mounting mechanism for mounting the four pressure measuring mechanisms, four first sealing mechanisms are arranged in a ring shape near the center on the outside of the mounting mechanism, and the inside of the four first sealing mechanisms are each provided with a second sealing mechanism for placing the four pressure measuring mechanisms and performing a sealing function.

[0006] As a preferred embodiment of the above technical solution, the main docking mechanism includes a bore tube, and a first externally threaded tube is fixedly connected to one side of the bore tube.

[0007] As a preferred embodiment of the above technical solution, the installation mechanism includes a pressure measuring tube, a first internal threaded sleeve is fixedly connected to one side of the pressure measuring tube, the first internal threaded sleeve is threadedly sleeved on the outside of the first external threaded tube, and the first internal threaded sleeve and the first external threaded tube are detachably connected.

[0008] As a preferred embodiment of the above technical solution, the pressure measuring tube is fixedly connected to a second externally threaded tube on the side away from the bore tube, four fixing grooves are fixedly connected in a ring arrangement at the center of the outer side of the pressure measuring tube, a pressure relief hole is fixedly connected to the center of the four fixing grooves close to each other, and a first sealing ring is fixedly connected to the edge of the center of the four fixing grooves close to each other.

[0009] As a preferred embodiment of the above technical solution, the first sealing mechanism includes a fixed tube, the fixed tube is fixedly sleeved in the fixed groove, a threaded groove is opened in the fixed tube, and a second sealing ring is fixedly connected to the side of the fixed tube away from the pressure measuring tube.

[0010] As a preferred embodiment of the above technical solution, the second sealing mechanism includes a third externally threaded tube, the third externally threaded tube is threadedly sleeved inside the fixed tube, and the third externally threaded tube and the fixed tube are detachably connected, and an extrusion ring is fixedly connected to the outer side of the third externally threaded tube away from one end of the pressure measuring tube.

[0011] As a preferred embodiment of the above technical solution, a third sealing ring is fixedly connected to the lower end of the extrusion ring, and the third sealing ring is in contact with the side of the second sealing ring that is close to each other. A fourth sealing ring is fixedly connected to one end of the third externally threaded tube close to the pressure measuring tube, and the fourth sealing ring is in contact with the side of the first sealing ring that is close to each other. A sleeve hole is opened through one side of the third externally threaded tube.

[0012] As a preferred embodiment of the above technical solution, the pressure measuring mechanism includes a pressure sensor body, the pressure sensor body is fixedly sleeved inside the third external threaded tube, a pressure measuring probe is fixedly connected to the center of the pressure sensor body close to the fourth sealing ring, the pressure measuring probe is sleeved inside the sleeve hole, and a power supply interface and a signal transmission interface are provided at one end of the pressure sensor body away from the pressure measuring probe.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] In the utility model, the main docking mechanism serves as the core interface part of the entire sensor, and its main function is to connect the bore tube or other pressure sources to transmit the high-pressure environment in the bore to the subsequent measurement system. In the setting of the installation mechanism, it is located on one side of the main docking mechanism, and is responsible for providing a stable installation platform for the four pressure measuring mechanisms. The design of the installation mechanism takes into account the needs of multi-point monitoring, and four first sealing mechanisms are arranged in a ring shape at the center of its outer side to ensure that each pressure measuring point can independently and accurately monitor the pressure in the bore. The main function of the first sealing mechanism is to establish a preliminary sealing barrier to prevent leakage of high-pressure gas during the transmission process. They are respectively located at four key positions of the installation mechanism, and through close cooperation with the second sealing mechanism, a stable measurement environment is created for the pressure measuring mechanism. This design is not It not only improves the sealing performance of the sensor, but also ensures the accuracy of measurement. The second sealing mechanism further enhances the sealing effect. They are arranged inside the first sealing mechanism and are specifically used to place and fix the pressure measuring mechanism. Through complex sealing structure and material selection, the second sealing mechanism can ensure that the pressure measuring mechanism works stably under high pressure environment while preventing any possible gas leakage. The pressure measuring mechanism, as a component that directly senses and measures the pressure in the chamber, is precisely installed inside the second sealing mechanism. They convert pressure changes into electrical signals through internal sensor elements, and output them to the data acquisition system through the corresponding interface for processing and analysis. The working principle of the entire sensor is such a precise process of conversion from high pressure environment to electrical signal, which ensures the accuracy and reliability of chamber pressure test. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of a large-range dynamic pressure sensor used for chamber pressure testing;

[0016] Figure 2 It is a schematic diagram of the three-dimensional split structure of a large-range dynamic pressure sensor used for chamber pressure testing;

[0017] Figure 3 It is a three-dimensional structural schematic diagram of a large-range dynamic pressure sensor installation mechanism for chamber pressure testing;

[0018] Figure 4It is a three-dimensional structural schematic diagram of a first sealing mechanism of a large-range dynamic pressure sensor used for chamber pressure testing;

[0019] Figure 5 It is a three-dimensional structural schematic diagram of a second sealing mechanism of a large-range dynamic pressure sensor used for chamber pressure testing;

[0020] Figure 6 It is a three-dimensional structural schematic diagram of a pressure measuring mechanism of a large-range dynamic pressure sensor used for chamber pressure testing;

[0021] Figure 7 It is a three-dimensional structural schematic diagram from another perspective of a pressure measuring mechanism of a large-range dynamic pressure sensor used for chamber pressure testing.

[0022] Legend:

[0023] 1. Main docking mechanism; 101. Bore tube; 102. First externally threaded tube; 2. Installation mechanism; 201. Pressure measuring tube; 202. First internally threaded sleeve; 203. Second externally threaded tube; 204. Fixing groove; 205. Pressure relief hole; 206. First sealing ring; 3. First sealing mechanism; 301. Fixing tube; 302. Threaded groove; 303. Second sealing ring; 4. Second sealing mechanism; 401. Third externally threaded tube; 402. Extrusion ring; 403. Third sealing ring; 404. Fourth sealing ring; 405. Sleeve hole; 5. Pressure measuring mechanism; 501. Pressure sensor body; 502. Pressure measuring probe; 503. Power supply interface; 504. Signal transmission interface. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0025] like Figure 1 and Figure 2As shown, the utility model provides a technical solution: a large-range dynamic pressure sensor for chamber pressure testing, comprising a main docking mechanism 1 and four pressure measuring mechanisms 5, a mounting mechanism 2 for mounting the four pressure measuring mechanisms 5 is arranged on one side of the main docking mechanism 1, four first sealing mechanisms 3 are arranged in a ring arrangement on the outer side of the mounting mechanism 2 near the center, and the four first sealing mechanisms 3 are each provided with a second sealing mechanism 4 for placing the four pressure measuring mechanisms 5 and performing a sealing function, the main docking mechanism 1 is the core interface part of the entire sensor, and its main function is to connect the chamber tube 101 or other pressure sources, and transmit the high-pressure environment in the chamber to the subsequent measurement system, in the setting of the mounting mechanism 2, it is located on one side of the main docking mechanism 1, and is responsible for providing a stable mounting platform for the four pressure measuring mechanisms 5, the design of the mounting mechanism 2 takes into account the needs of multi-point monitoring, and by arranging four first sealing mechanisms 3 in a ring arrangement on the outer side near the center, it is ensured that each pressure measuring point can independently and accurately monitor the pressure in the chamber, and the main function of the first sealing mechanism 3 is to establish a preliminary Sealing barriers prevent leakage of high-pressure gas during transmission. They are located at four key positions of the mounting mechanism 2 and create a stable measurement environment for the pressure measuring mechanism 5 by closely cooperating with the second sealing mechanism 4. This design not only improves the sealing performance of the sensor, but also ensures the accuracy of the measurement. The second sealing mechanism 4 further enhances the sealing effect. They are arranged inside the first sealing mechanism 3 and are specifically used to place and fix the pressure measuring mechanism 5. Through complex sealing structure and material selection, the second sealing mechanism 4 can ensure that the pressure measuring mechanism 5 works stably under high-pressure environment while preventing any possible gas leakage. The pressure measuring mechanism 5, as a component that directly senses and measures the pressure in the chamber, is precisely installed inside the second sealing mechanism 4. They convert pressure changes into electrical signals through internal sensor elements and output them to the data acquisition system through corresponding interfaces for processing and analysis. The working principle of the entire sensor is such a precise process of conversion from high-pressure environment to electrical signals, which ensures the accuracy and reliability of chamber pressure testing.

[0026] As an implementation method in this embodiment, Figure 2 and Figure 3As shown, the main docking mechanism 1 includes a bore tube 101, one side of the bore tube 101 is fixedly connected to a first externally threaded tube 102, the installation mechanism 2 includes a pressure measuring tube 201, one side of the pressure measuring tube 201 is fixedly connected to a first internally threaded sleeve 202, the first internally threaded sleeve 202 is threadedly sleeved on the outside of the first externally threaded tube 102, and the first internally threaded sleeve 202 and the first externally threaded tube 102 are detachably connected, the side of the pressure measuring tube 201 away from the bore tube 101 is fixedly connected to a second externally threaded tube 203, four fixed grooves 204 are fixedly connected in a circular arrangement at the center of the outer side of the pressure measuring tube 201, the centers of the four fixed grooves 204 close to each other are all fixedly connected to a pressure relief hole 205, the centers of the four fixed grooves 204 close to each other are all fixedly connected to a first sealing ring 206 at the edge, the bore tube 101 and the pressure measuring tube 201 are fixedly connected to each other. The threaded connection between the first externally threaded tube 102 and the first internally threaded sleeve 202 ensures the stability of the connection, and can withstand the high pressure in the bore without loosening. The detachable connection design makes the disassembly and installation between the bore tube 101 and the pressure measuring tube 201 simple and quick, and is convenient for replacing the sensor when it is damaged or needs maintenance. The four fixed grooves 204 arranged in a ring on the outside of the pressure measuring tube 201 provide a basis for installing four pressure measuring mechanisms 5, realizing multi-point monitoring of the bore pressure and improving the comprehensiveness and accuracy of the data. The bore tube 101, as a direct component bearing the bore pressure, is tightly connected to the first internally threaded sleeve 202 of the pressure measuring tube 201 through the first externally threaded tube 102, so as to transmit the bore pressure to the pressure measuring tube 201. The fixed grooves 204 on the pressure measuring tube 201 provide support and positioning points for the subsequent installation of the pressure measuring mechanism 5.

[0027] As an implementation method in this embodiment, Figure 4 As shown, the first sealing mechanism 3 includes a fixed tube 301, which is fixedly sleeved inside the fixed groove 204. A threaded groove 302 is opened inside the fixed tube 301. A second sealing ring 303 is fixedly connected to the fixed tube 301 at the side away from the pressure measuring tube 201. The threaded connection between the threaded groove 302 in the fixed tube 301 and the third externally threaded tube 401, plus the sealing effect of the second sealing ring 303, forms a double sealing structure, which effectively prevents leakage of high-pressure gas. The fixed tube 301 is fixedly sleeved inside the fixed groove 204, which provides an accurate installation position for the second sealing mechanism 4 and ensures the precise positioning of the pressure measuring mechanism 5. The fixed tube 301 is threadedly connected to the third externally threaded tube 401 through the threaded groove 302 inside it. At the same time, the second sealing ring 303 is in close contact with the subsequently installed components to form a sealing interface to prevent high-pressure gas from leaking through the interface.

[0028] As an implementation method in this embodiment, Figure 5As shown, the second sealing mechanism 4 includes a third externally threaded tube 401, the third externally threaded tube 401 is threadedly sleeved inside the fixed tube 301, and the third externally threaded tube 401 and the fixed tube 301 are detachably connected, the outer side of the third externally threaded tube 401 is fixedly connected to an extrusion ring 402 at one end away from the pressure measuring tube 201, and a third sealing ring 403 is fixedly connected to the lower end of the extrusion ring 402, and the third sealing ring 403 and the second sealing ring 303 are in contact with each other on one side thereof, and the third externally threaded tube 401 is fixedly connected to one end thereof close to the pressure measuring tube 201, and the fourth sealing ring 404 and the first sealing ring 206 are in contact with each other on one side thereof, and a sleeve hole 405 is opened through one side of the third externally threaded tube 401, and the third The sealing ring 403 contacts the second sealing ring 303, and the fourth sealing ring 404 contacts the first sealing ring 206, forming a multi-layer sealing structure, further improving the sealing performance. The extrusion ring 402 applies pressure to the second sealing ring 303 through the third sealing ring 403, ensuring the tightness of the sealing interface, and also helping to achieve pressure balance under high pressure. The sleeve hole 405 provides an installation channel for the pressure probe 502, while protecting it from external impact and damage. The third external threaded tube 401 is fixed inside the fixed tube 301 through a threaded connection. At the same time, the extrusion ring 402 is in close contact with the second sealing ring 303 through the third sealing ring 403, and the fourth sealing ring 404 is in contact with the first sealing ring 206, forming a multi-layer seal. The sleeve hole 405 allows the pressure probe 502 to pass through and be directly exposed to the pressure environment to be measured.

[0029] As an implementation method in this embodiment, Figure 6 and Figure 7 As shown, the pressure measuring mechanism 5 includes a pressure sensor body 501, which is fixedly sleeved inside the third external threaded tube 401, and a pressure measuring probe 502 is fixedly connected to the center of the pressure sensor body 501 near the fourth sealing ring 404, and the pressure measuring probe 502 is sleeved inside the sleeve hole 405. A power supply interface 503 and a signal transmission interface 504 are provided at one end of the pressure sensor body 501 away from the pressure measuring probe 502. The pressure sensor body 501 has high-precision measurement capability and can accurately capture the change of the pressure in the bore. The pressure measuring probe 502 is directly sleeved inside the sleeve hole 405, and can directly sense and measure the pressure in the bore, reducing the measurement error. The setting of the power supply interface 503 and the signal transmission interface 504 enables the pressure sensor body 501 to be easily connected to the power supply and data acquisition system. The pressure sensor body 501 senses the pressure change transmitted by the pressure measuring probe 502 through its internal measuring elements such as piezoresistance and piezoelectricity, and converts it into electrical signals. These electrical signals are output to the data acquisition system through the signal transmission interface 504 for processing and analysis. At the same time, the power interface 503 provides the pressure sensor body 501 with the electrical energy required for operation.

[0030] Working principle: The sensor consists of a main docking mechanism 1, an installation mechanism 2, four first sealing mechanisms 3, four second sealing mechanisms 4 and four pressure measuring mechanisms 5. First, the bore tube 101, as a direct bearing component of the bore pressure, is threadedly connected to the first internal threaded sleeve 202 of the pressure measuring tube 201 through the first external threaded tube 102 thereon, thereby realizing a stable and easy-to-maintain docking structure. The four annularly arranged fixing grooves 204 on the outside of the pressure measuring tube 201 provide an installation basis for subsequent sealing and pressure measuring mechanisms 5. Inside each fixing groove 204, the fixing tube 301, as a core component of the first sealing mechanism 3, is threadedly connected to the third external threaded tube 401 through the internal threaded groove 302 thereof, thereby forming a preliminary sealing structure. At the same time, the second sealing ring 303 is located between the fixing tube 301 and the third external threaded tube 401, thereby enhancing the sealing performance. Sealing effect, the third externally threaded tube 401 further serves as a part of the second sealing mechanism 4, and applies pressure to the second sealing ring 303 through the extrusion ring 402 and the third sealing ring 403, thereby achieving a tighter seal. In addition, the fourth sealing ring 404 contacts with the first sealing ring 206 to form a multi-layer sealing structure, which effectively prevents the leakage of high-pressure gas. The pressure sensor body 501 of the pressure measuring mechanism 5 is fixedly sleeved inside the third externally threaded tube 401, and its pressure measuring probe 502 is directly sleeved inside the sleeve hole 405 to directly sense and measure the pressure in the chamber. The measuring element inside the pressure sensor body 501 converts the sensed pressure change into an electrical signal, and outputs it to the data acquisition system for processing and analysis through the signal transmission interface 504. At the same time, the power supply interface 503 provides the pressure sensor body 501 with the required electrical energy for operation.

[0031] The above embodiments are only used to illustrate the technical solution of the present invention, but not to limit it.

Claims

1. A large-range dynamic pressure sensor for chamber pressure testing, comprising a main docking mechanism (1) and four pressure measuring mechanisms (5), characterized in that: A mounting mechanism (2) for mounting four pressure measuring mechanisms (5) is arranged on one side of the main docking mechanism (1); four first sealing mechanisms (3) are arranged in a ring shape near the center of the outer side of the mounting mechanism (2); and second sealing mechanisms (4) for placing the four pressure measuring mechanisms (5) and performing a sealing function are arranged inside the four first sealing mechanisms (3).

2. A large-range dynamic pressure sensor for chamber pressure testing according to claim 1, characterized in that: The main docking mechanism (1) comprises a bore tube (101), and a first externally threaded tube (102) is fixedly connected to one side of the bore tube (101).

3. A large-range dynamic pressure sensor for chamber pressure testing according to claim 2, characterized in that: The installation mechanism (2) comprises a pressure measuring tube (201), one side of which is fixedly connected to a first internally threaded sleeve (202), the first internally threaded sleeve (202) being threadedly sleeved on the outside of a first externally threaded tube (102), and the first internally threaded sleeve (202) and the first externally threaded tube (102) are detachably connected.

4. A large-range dynamic pressure sensor for chamber pressure testing according to claim 3, characterized in that: A second externally threaded tube (203) is fixedly connected to the side of the pressure measuring tube (201) away from the bore tube (101); four fixing grooves (204) are fixedly connected in a circular arrangement at the center of the outer side of the pressure measuring tube (201); a pressure relief hole (205) is fixedly connected to the center of the side where the four fixing grooves (204) are close to each other; and a first sealing ring (206) is fixedly connected to the edge of the center of the side where the four fixing grooves (204) are close to each other.

5. A large-range dynamic pressure sensor for chamber pressure testing according to claim 4, characterized in that: The first sealing mechanism (3) comprises a fixed tube (301), the fixed tube (301) being fixedly sleeved inside the fixed groove (204), a threaded groove (302) being provided inside the fixed tube (301), and a second sealing ring (303) being fixedly connected to a side of the fixed tube (301) away from the pressure measuring tube (201).

6. A large-range dynamic pressure sensor for chamber pressure testing according to claim 1, characterized in that: The second sealing mechanism (4) comprises a third externally threaded tube (401), the third externally threaded tube (401) being threadably sleeved inside the fixed tube (301), and the third externally threaded tube (401) and the fixed tube (301) being detachably connected, and an extrusion ring (402) is fixedly connected to the outer side of the third externally threaded tube (401) at one end away from the pressure measuring tube (201).

7. A large-range dynamic pressure sensor for chamber pressure testing according to claim 6, characterized in that: A third sealing ring (403) is fixedly connected to the lower end of the extrusion ring (402), and the third sealing ring (403) and the second sealing ring (303) are in contact with each other on their respective sides. A fourth sealing ring (404) is fixedly connected to one end of the third externally threaded tube (401) close to the pressure measuring tube (201), and the fourth sealing ring (404) and the first sealing ring (206) are in contact with each other on their respective sides. A sleeve hole (405) is provided through one side of the third externally threaded tube (401).

8. A large-range dynamic pressure sensor for chamber pressure testing according to claim 1, characterized in that: The pressure measuring mechanism (5) comprises a pressure sensor body (501), the pressure sensor body (501) is fixedly sleeved inside the third externally threaded tube (401), a pressure measuring probe (502) is fixedly connected to the center of one side of the pressure sensor body (501) close to the fourth sealing ring (404), the pressure measuring probe (502) is sleeved inside the sleeve hole (405), and a power supply interface (503) and a signal transmission interface (504) are provided at one end of the pressure sensor body (501) away from the pressure measuring probe (502).

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