CN216433367U

CN216433367U - Multi-lead pressure hole type buffer screw and pressure sensor

Info

Publication number: CN216433367U
Application number: CN202123301452.8U
Authority: CN
Inventors: 刘杉杉; 任重; 周璇
Original assignee: Wuhan Aviation Sensing Technology Co ltd
Current assignee: Wuhan Aviation Sensing Technology Co ltd
Priority date: 2021-12-22
Filing date: 2021-12-22
Publication date: 2022-05-03
Anticipated expiration: 2031-12-22

Abstract

The utility model provides a buffer screw with multiple pressure leading holes, which comprises a screw body, wherein a pressure leading cavity is arranged on the screw body, a pressure leading hole communicated with the pressure leading cavity is arranged at one end part of the screw body, and a medium reflux groove is arranged at one end part of the screw body; the utility model provides a pressure sensor, includes filler neck and pressure sensing core be equipped with the core mounting groove in the filler neck be equipped with in the filler neck and feel the pressure chamber with the core body of core mounting groove intercommunication, screw body installs in the screw mounting groove of filler neck, is equipped with in the screw mounting groove of filler neck and presses the pressure cushion chamber of hole intercommunication with the introduction, screw body's medium backward flow groove and pressure cushion chamber and core pressure sensing chamber intercommunication. After the medium pressure passes through the pressure guide cavity of the screw body, the medium pressure flows into the pressure buffer cavity and the core body pressure sensing cavity through a plurality of pressure guide holes in the screw body respectively, the pulse energy of the medium can be effectively reduced by changing the flowing direction of the medium, and meanwhile, the pressure buffer cavity also provides a space for mutual dissipation of medium impact energy.

Description

Multi-lead pressure hole type buffer screw and pressure sensor

Technical Field

The utility model relates to a technical field of sensor, more specifically say so and relate to pressure sensor's technical field.

Background

The pressure sensor is a device or apparatus capable of sensing pressure signals and converting the pressure signals into electric signals for collection according to a certain rule. When the pressure measuring medium is liquid or oil-gas mixture, the pressure in the pipeline is changed rapidly due to the action of various pumps, valves and the like in the system, so that pressure pulse or cavitation is generated.

In order to solve the above problem, chinese utility model patent with application number CN201920212110.2 discloses a screw type pressure buffering device and pressure sensor, include: a buffer screw and a lining; the buffer screw is characterized in that an external thread with a preset length is arranged at one end of the buffer screw, a first channel and a second channel are arranged inside the buffer screw, an opening of the first channel is arranged on the end face of the other end of the buffer screw, and an opening of the second channel is arranged on the side wall of the buffer screw with the external thread; a third channel is arranged in the lining, an internal thread matched with the external thread of the buffer screw is arranged in the third channel, and the buffer screw is connected with the lining through the external thread and the internal thread. The screw type pressure buffering device is included, and by arranging the buffering screw and the lining which are connected through threads and introducing fluid into the threaded connection of the buffering screw and the lining through a channel arranged on the buffering screw, the hydraulic pulse of the fluid is greatly weakened through the threaded connection, so that the hydraulic pulse of the fluid flowing out of the lining is basically eliminated. The device has simple structure, small volume and light weight.

However, the screw type pressure buffer device in the above patent has a large structural size (the radial dimension is close to the dimension of the pressure sensing core), and has high requirements for the installation position and the installation space, which limits the miniaturization and light weight design of the sensor; in addition, the screw type pressure buffering device is easy to block and test residual pressure during working, and measuring precision is affected.

SUMMERY OF THE UTILITY MODEL

The utility model provides a draw pressure cell formula buffer screw and pressure sensor more, the buffer structure size of having solved the pressure sensor among the prior art is great, and is higher to mounted position and installation space requirement, and the buffer problem of jam and test residual pressure appears in the work easily.

The technical scheme of the utility model is realized like this:

a multi-guide-pressure-hole type buffer screw comprises a screw body, wherein a guide pressure cavity is arranged on the screw body, a guide pressure hole communicated with the guide pressure cavity is formed in one end of the screw body, and a medium backflow groove is formed in one end of the screw body.

Furthermore, the medium backflow groove of the screw body is cross-shaped.

Furthermore, the pressure guiding holes are uniformly distributed along the circumferential direction of the screw body.

Further, a wrench groove is formed at the other end of the screw body.

Further, one end of the screw body is tapered.

The utility model provides a pressure sensor, includes filler neck and pressure sensing core be equipped with the core mounting groove in the filler neck, the pressure sensing core is installed in the core mounting groove be equipped with in the filler neck and feel the pressure chamber with the core body of core mounting groove intercommunication, still including leading more pressure cellular type buffer screw the filler neck terminal surface is equipped with the screw mounting groove, the screw body is installed in the screw mounting groove of filler neck, is equipped with in the screw mounting groove of filler neck and draws the pressure cushion chamber that presses the hole to communicate, the medium backward flow groove and the pressure cushion chamber of screw body and core pressure sensing chamber intercommunication.

Furthermore, a throttling hole communicated with the screw mounting groove and the core body pressure sensing cavity is formed in the filler neck, and the medium backflow groove of the screw body is communicated with the throttling hole.

Further, be equipped with the internal thread on the internal perisporium of the screw mounting groove of filler neck, be equipped with the external screw thread on the periphery wall of screw body, screw body passes through the internal thread threaded connection of external screw thread and screw mounting groove, and a tip of screw body and the terminal surface butt of screw mounting groove.

Further, after the filler neck and the screw body are connected through threads, one end of the screw body is welded with the end face of the screw mounting groove.

The utility model adopts the beneficial effect that above-mentioned technical solution can reach is:

1. the multi-lead-hole type buffer screw is small in size and is installed in a screw installation groove of the filler neck, the structural design of a pressure transmitting and demodulating part at the rear end of the pressure sensor is not affected, and the miniaturization and light-weight design of the pressure sensor is facilitated.

2. After the medium pressure passes through the pressure guide cavity of the screw body, the medium pressure flows into the pressure buffer cavity and the core body pressure sensing cavity through a plurality of pressure guide holes in the screw body respectively, the pulse energy of the medium can be effectively reduced by changing the flowing direction of the medium, and meanwhile, the pressure buffer cavity also provides a space for mutual dissipation of medium impact energy; and the design of the throttling hole in the filler neck can further reduce the impact energy of the medium; in addition, the design of the core pressure sensing cavity can enable the medium to be uniformly mixed and then act on the surface of the pressure sensing core, so that the pressure measurement is more stable and accurate, the situations of blockage and residual pressure testing are avoided, and the measurement precision is ensured.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a cross-sectional view of a pressure sensor;

fig. 2 is a perspective view of a multi-lead socket cushion screw;

FIG. 3 is a schematic view of the multi-lead socket cushion screw of FIG. 1;

FIG. 4 is a top view of a multi-lead socket buffer screw;

fig. 5 is a bottom view of a multi-lead socket buffer screw.

In the drawings, the parts corresponding to the reference numerals are as follows:

the pressure-sensitive type pressure-sensitive type pressure-type pressure-sensitive type pressure-sensitive type pressure-sensitive type pressure-sensitive type pressure-type pressure.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the embodiments of the present invention, and obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

Referring to fig. 2 to 5, the multi-guiding-pressure-hole type buffer screw comprises a screw body 4, wherein a guiding-pressure cavity 9 is arranged on the screw body 4, one end of the screw body 4 is conical, guiding-pressure holes 10 communicated with the guiding-pressure cavity 9 are formed in one end of the screw body 4, the guiding-pressure holes 10 are uniformly distributed along the circumferential direction of the screw body 4, a medium backflow groove 11 is formed in one end of the screw body 4, the medium backflow groove 11 of the screw body 4 is cross-shaped, and a wrench groove 15 is formed in the other end of the screw body 4.

Referring to fig. 1, a pressure sensor comprises a filler neck 1, a pressure sensing core 2 and a multi-lead pressure hole type buffer screw, wherein a core body installation groove 8 is arranged in the filler neck 1, the pressure sensing core 2 is installed in the core body installation groove 8, a screw installation groove 5 is arranged on the end surface of the filler neck 1, a screw body 4 is installed in the screw installation groove 5 of the filler neck 1, and the specific connection relationship between the screw body 4 and the screw installation groove 5 of the filler neck 1 is as follows: be equipped with internal thread 13 on the internal perisporium of the screw mounting groove 5 of filler neck 1, be equipped with external screw thread 14 on the periphery wall of screw body 4, screw body 4 passes through external screw thread 14 and the internal thread 13 threaded connection of screw mounting groove 5, and a tip of screw body 4 and the terminal surface butt of screw mounting groove 5 filler neck 1 and screw body 4 pass through threaded connection back, a tip of screw body 4 and the end face welding of screw mounting groove 5. The pressure buffering cavity 7 communicated with the pressure guide hole 10 is arranged in the screw mounting groove 5 of the filler pipe head 1, the core body pressure sensing cavity 3 communicated with the core body mounting groove 8 is arranged in the filler pipe head 1, and the medium reflux groove 11 of the screw body 4 is communicated with the pressure buffering cavity 7 and the core body pressure sensing cavity 3. The medium reflux groove 11 of the screw body 4 and the core body pressure sensing cavity 3 are communicated specifically as follows: an orifice 6 communicating with the screw mounting groove 5 and the core pressure sensing chamber 3 is provided in the filler neck 1, and a medium return groove 11 of the screw body 4 communicates with the orifice 6.

The multi-lead pressure hole type buffer screw has smaller size and is arranged in the screw mounting groove 5 of the filler pipe orifice 1, has no influence on the structural design of the pressure transmitting and demodulating part at the rear end of the pressure sensor, and is beneficial to realizing the miniaturization and lightweight design of the pressure sensor; after the medium pressure passes through the pressure guide cavity 9 of the screw body 4, the medium pressure respectively flows to the core body pressure sensing cavity 3 and the pressure sensing core body 2 in the core body mounting groove 8 through a plurality of pressure guide holes 10 on the screw body 4, and the pulse energy of the medium can be effectively reduced by changing the flowing direction of the medium; meanwhile, the pressure buffer cavity 7 also provides a space for mutual dissipation of medium impact energy; and the throttle hole 6 in the filler neck 1 is designed to further reduce the impact energy of the medium; in addition, the design of the core body pressure sensing cavity 3 can enable the medium to be fully mixed and then act on the surface of the pressure sensing core body 2, so that the pressure measurement is more stable and accurate.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The multi-lead-pressure-hole type buffer screw is characterized by comprising a screw body (4), wherein a lead-pressure cavity (9) is arranged on the screw body (4), a lead-pressure hole (10) communicated with the lead-pressure cavity (9) is formed in one end part of the screw body (4), and a medium backflow groove (11) is formed in one end part of the screw body (4).

2. The multi-lead-hole buffer screw according to claim 1, wherein the medium-returning groove (11) of the screw body (4) is cross-shaped.

3. The multi-piercing cushion screw according to claim 1, wherein the pressure-piercing holes (10) are evenly distributed along the circumference of the screw body (4).

4. A multi-lead-hole buffer screw according to claim 1, characterized in that a wrench groove (15) is provided at the other end of the screw body (4).

5. A multi-lead socket cushion screw according to claim 1, wherein one end of the screw body (4) is tapered.

6. A pressure sensor comprises a filler neck (1) and a pressure sensing core body (2), a core body installation groove (8) is arranged in the filler pipe nozzle (1), the pressure sensing core body (2) is arranged in the core body installation groove (8), a core body pressure sensing cavity (3) communicated with the core body mounting groove (8) is arranged in the filler neck (1), the multi-lead hole type buffer screw is characterized by further comprising the multi-lead hole type buffer screw according to any one of claims 1 to 5, a screw mounting groove (5) is arranged on the end surface of the filler neck (1), the screw body (4) is mounted in the screw mounting groove (5) of the filler neck (1), a pressure buffer cavity (7) communicated with a pressure guide hole (10) is arranged in a screw mounting groove (5) of the filler pipe head (1), and a medium reflux groove (11) of the screw body (4) is communicated with the pressure buffer cavity (7) and the core body pressure sensing cavity (3).

7. The pressure sensor according to claim 6, wherein an orifice (6) communicating with the screw mounting groove (5) and the core pressure sensing chamber (3) is provided in the filler neck (1), and the medium return groove (11) of the screw body (4) communicates with the orifice (6).

8. The pressure sensor according to claim 6, wherein an internal thread (13) is provided on an inner peripheral wall of the screw mounting groove (5) of the filler neck (1), an external thread (14) is provided on an outer peripheral wall of the screw body (4), the screw body (4) is threadedly connected to the internal thread (13) of the screw mounting groove (5) through the external thread (14), and an end portion of the screw body (4) abuts against an end surface of the screw mounting groove (5).

9. The pressure sensor according to claim 8, wherein an end of the screw body (4) is welded to an end surface of the screw mounting groove (5) after the filler neck (1) is threadedly coupled to the screw body (4).