High frequency pressure sensor connection nipple structure

Abstract

The utility model provides a kind of high-frequency pressure sensor connecting pipe nozzle structure, including the pressure sensitive element of installing in the installation groove in the top end of connecting pipe nozzle body, connecting pipe nozzle body bottom is equipped with pressure conduction flow channel extension and is communicated to installation groove, buffer filter is installed in installation groove below pressure sensitive element, buffer filter includes the through hole of being set in the through hole of the baffle, the through hole is communicated to pressure conduction flow channel, baffle is fixed with baffle between gap, baffle installs pressure sensitive element and baffle vertical projection on baffle covers the through hole. The utility model is through the design second pressure conduction groove and is presented the pressure inlet of the neck of medium, and cooperate with the pressure conduction flow channel of elongated, short straight first pressure conduction groove realizes the quick conduction of pressure, improves the response frequency of pressure measurement;Change medium flow direction by buffer filter, prevent high-speed medium direct impact pressure sensitive element, improve product reliability and long-term stability.

Description

Technical Field

[0001] This utility model relates to a connector structure for a high-frequency pressure sensor. Background Technology

[0002] High-frequency pressure sensors are sensors capable of rapidly capturing pressure changes. To ensure rapid pressure transmission from the sensor's inlet nozzle to the pressure-sensitive element, traditional pressure sensors have employed straight-through pipes within the nozzle to reduce pressure transmission damping, or shortened the internal pressure transmission distance to achieve rapid pressure transmission. However, shortening the internal pressure transmission distance has limitations due to considerations of mechanical interfaces (such as thread length) and sealing ring design. Furthermore, when testing liquid media, the inertia of the liquid can cause significant dynamic pressure, affecting measurement results and even creating a water hammer effect that impacts the relatively fragile sensitive element, shortening the sensor's lifespan or even causing damage. Utility Model Content

[0003] This invention proposes a high-frequency pressure sensor nozzle structure that enables more efficient pressure transmission and reduces pressure shock, making it suitable for applications requiring rapid capture of medium pressure changes.

[0004] The technical solution of this utility model is implemented as follows: A high-frequency pressure sensor connector structure includes a connector body and a pressure-sensitive element installed in a mounting groove at the top of the connector body. A pressure conduction channel extends from the bottom of the connector body into the mounting groove. A buffer filter is installed in the mounting groove below the pressure-sensitive element. The buffer filter includes a through hole in a partition plate, which connects to the pressure conduction channel. A baffle is fixedly installed on the partition plate, and there is a gap between the baffle and the partition plate. The pressure-sensitive element is installed on the baffle plate, and the vertical projection of the baffle on the partition plate covers the through hole.

[0005] Preferably, the through holes are evenly spaced on the partition plate, the middle part of the baffle is fixed to the middle part of the partition plate, and the vertical projection of the outer circumference of the baffle on the partition plate covers the through holes.

[0006] Preferably, a first pressure transmission groove is provided at the bottom center of the mounting groove, and the first pressure transmission groove is connected to the pressure transmission channel; the partition is installed on the first pressure transmission groove and the through hole is connected to the first pressure transmission groove.

[0007] Preferably, the cross-sectional area of ​​the first pressure transmission groove is larger than the cross-sectional area of ​​the pressure transmission channel, and the height of the first pressure transmission groove is smaller than the height of the pressure transmission channel.

[0008] Preferably, the bottom end face of the connector body is provided with a second pressure transmission groove. The second pressure transmission groove has a constricted structure with a larger opening on the outside and a smaller opening on the inside. The pressure transmission channel matches the size of the constricted part of the second pressure transmission groove and is connected to it.

[0009] The beneficial effects of this invention are as follows: by designing the second pressure transmission groove as a constricted pressure inlet to accelerate the medium, and in conjunction with the slender pressure transmission channel, the short and straight first pressure transmission groove achieves rapid pressure transmission, thereby improving the response frequency of pressure measurement; then, by changing the flow direction of the medium through the buffer filter, the high-speed medium is prevented from directly impacting the pressure-sensitive element, thereby improving the reliability and long-term stability of the product. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 This is a schematic diagram of the structure of this utility model.

[0012] Figure 2 This is a cross-sectional schematic diagram of the present invention.

[0013] Figure 3 This is a schematic diagram of the structure of the buffer filter of this utility model.

[0014] Figure 4 This is a cross-sectional schematic diagram of the buffer filter of this utility model. Detailed Implementation

[0015] The technical solution of this utility model will be clearly and completely described below with reference to its embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0016] like Figure 1-4The diagram illustrates a high-frequency pressure sensor connector structure, comprising a connector body 1 and a pressure-sensitive element 6 installed in a mounting groove 2 at the top of the connector body 1. A pressure conduction channel 3 extends from the bottom of the connector body 1 into the mounting groove 2. Medium flows through the pressure conduction channel 3 to supply pressure to the pressure-sensitive element 6, thereby detecting pressure changes. A buffer filter 4, made of high-strength stainless steel, is installed below the pressure-sensitive element 6 in the mounting groove 2. The buffer filter 4 includes a through hole 402 in a partition 401, which connects to the pressure conduction channel 3. A baffle 403 is fixedly installed on the partition 401, with a gap between the baffle 403 and the partition 401. The vertical projection of the baffle 403 onto the partition 401 covers the through hole 402. The pressure-sensitive element 6 is installed on the baffle 403. It is understood that the pressure-sensitive element 6 uses a conventional installation method, with mounting supports around its bottom. Its bottom surface is above the baffle 403, allowing medium to flow into the cavity between them for detection.

[0017] As a preferred embodiment, the through holes 402 are evenly spaced on the partition plate 401, and the middle part of the baffle plate 403 is fixed to the middle part of the partition plate 401. The vertical projection of the outer circumference of the baffle plate 403 on the partition plate 401 covers the through holes 402.

[0018] A first pressure transmission groove 5 is provided at the bottom center of the mounting groove 2, and the first pressure transmission groove 5 is connected to the pressure transmission channel 3; the partition 401 is installed on the first pressure transmission groove 5 and the through hole 402 is connected to the first pressure transmission groove 5; the cross-sectional area of ​​the first pressure transmission groove 5 is larger than the cross-sectional area of ​​the pressure transmission channel 3, and the height of the first pressure transmission groove 5 is smaller than the height of the pressure transmission channel 3. The high-speed medium first passes through the pressure transmission channel 3 to the first pressure transmission groove 5. After the medium impacts the central area of ​​the partition 401, the pressure medium changes its flow direction due to multiple through holes 402 in the outer area and the baffle 403 on the upper side. After rushing towards the side wall of the body 1, it gradually fills the pressure-sensing area and completes the pressure transmission.

[0019] In this embodiment, the bottom end face of the connector body 1 is provided with a second pressure transmission groove 7. The second pressure transmission groove 7 has a constricted structure with a larger opening on the outside and a smaller opening on the inside. The pressure transmission flow channel 3 matches the size of the constricted portion of the second pressure transmission groove 7 and is connected to it. The second pressure transmission groove 7 forms a pressure medium acceleration zone due to its constricted structure. The medium is accelerated in this zone by external pressure and flows towards the pressure transmission zone. Taking the commonly used G1 / 4 mounting thread as an example, when the acceleration zone narrows the flow channel to 2mm, a flow rate increase of more than 10 times can be achieved.

[0020] The pressure conduction channel 3 is a long and narrow direct-flow channel. Because the medium is in a high-velocity and small-volume channel, it will quickly fill the interior of the pressure conduction channel 3, completing the pressure conduction. The smaller the diameter of the pressure conduction channel 3, the better the acceleration effect. However, if the diameter is too small, the channel is easily blocked by impurities. A diameter of 2mm is recommended.

[0021] The first pressure transmission groove 5 is a short direct current channel. This design is mainly to cooperate with the buffer filter 4. The first pressure transmission groove 5 should be designed to be relatively short (about 1 mm) to minimize the transmission distance. The direct impact of the high-speed medium in the pressure transmission channel 3 and the water hammer effect are blocked by the filter. After the medium quickly fills the first pressure transmission groove 5, it transmits the pressure to the buffer filter 4. The buffer filter 4 changes the direction of the medium flow, preventing damage caused by the high-speed medium directly impacting the pressure-sensitive element 6.

[0022] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-frequency pressure sensor connector structure, comprising a connector body (1) and a pressure-sensitive element (6) installed in a mounting groove (2) at the top of the connector body (1), wherein a pressure transmission channel (3) is provided at the bottom of the connector body (1) extending into the mounting groove (2), characterized in that, A buffer filter (4) is installed in the mounting groove (2) below the pressure-sensitive element (6). The buffer filter (4) includes a through hole (402) that is provided through the partition (401). The through hole (402) is connected to the pressure transmission channel (3). A baffle (403) is fixedly provided on the partition (401). There is a gap between the baffle (403) and the partition (401). The pressure-sensitive element (6) is installed on the baffle (403), and the vertical projection of the baffle (403) on the partition (401) covers the through hole (402).

2. The high-frequency pressure sensor connector structure as described in claim 1, characterized in that, The through holes (402) are evenly spaced on the partition plate (401) in a circular pattern. The middle part of the baffle (403) is fixed to the middle part of the partition plate (401). The vertical projection of the outer circumference of the baffle (403) on the partition plate (401) covers the through holes (402).

3. The high-frequency pressure sensor connector structure as described in claim 1, characterized in that, The bottom center of the mounting groove (2) is provided with a first pressure transmission groove (5), which is connected to the pressure transmission channel (3); the partition (401) is installed on the first pressure transmission groove (5) and the through hole (402) is connected to the first pressure transmission groove (5).

4. The high-frequency pressure sensor connector structure as described in claim 3, characterized in that, The cross-sectional area of ​​the first pressure transmission groove (5) is greater than the cross-sectional area of ​​the pressure transmission channel (3), and the height of the first pressure transmission groove (5) is less than the height of the pressure transmission channel (3).

5. The high-frequency pressure sensor connector structure as described in claim 1, characterized in that, The bottom end face of the connector body (1) is provided with a second pressure transmission groove (7). The second pressure transmission groove (7) is a constricted structure with a larger opening on the outside and a smaller opening on the inside. The pressure transmission channel (3) matches the size of the constricted part of the second pressure transmission groove (7) and is connected to it.

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