CN218973714U

CN218973714U - Hydraulic force transmission device

Info

Publication number: CN218973714U
Application number: CN202222870238.2U
Authority: CN
Inventors: 胡伟
Original assignee: Hubei Zige Petroleum Equipment Co ltd
Current assignee: Hubei Zige Petroleum Equipment Co ltd
Priority date: 2022-10-26
Filing date: 2022-10-26
Publication date: 2023-05-05
Anticipated expiration: 2032-10-26

Abstract

The utility model relates to the technical field of high-pressure mud pressure measurement, in particular to a hydraulic force transmission device, which comprises a rubber diaphragm, a hydraulic transmission cavity, a shell and a piston, wherein the piston is positioned at one end of the interior of the shell, the rubber diaphragm is positioned at the other end of the interior of the shell, fluid to be measured enters the interior of the shell to strike the rubber diaphragm, the rubber diaphragm is stressed to drive hydraulic oil in the hydraulic transmission cavity to extrude, and the piston is pushed by thrust caused by extrusion to move so as to touch a pressure sensor.

Description

Hydraulic force transmission device

Technical Field

The utility model relates to the technical field of high-pressure mud pressure measurement, in particular to a hydraulic force transmission device.

Background

The product is applied to a high-pressure mud pressure gauge, and because the measured medium contains sand, cement and acid liquor, the sensor of the pressure gauge cannot be directly contacted with the measured medium, so that the sensor is prevented from being damaged by the sand, cement and acid liquor in the middle of the measured medium, and a rubber diaphragm is required to be arranged in the middle of the measured medium of the sensor. However, the rubber diaphragm used at present has a disadvantage that breakage cannot be predicted during operation, and the measured medium can enter the sensor and cause damage.

Disclosure of Invention

The utility model aims to overcome the technical defects, and provides a hydraulic force transmission device which solves the technical problem that a sensor is damaged because a diaphragm cannot be predicted to break in the prior art.

In order to achieve the technical purpose, the utility model provides the following technical scheme: the utility model provides a hydraulic pressure force transfer device for connect pressure sensor and measure fluid pressure, includes casing, piston unit and atress unit, the atress unit embedded in the casing separates the cavity in with the casing and forms a feed liquor chamber and a hydraulic pressure transmission chamber that are used for the intercommunication to await measuring fluid, piston unit one end is built-in hydraulic pressure transmission chamber and with the sealed sliding connection of hydraulic pressure transmission intracavity wall, just piston unit atress unit with the casing encloses and closes and form and supply hydraulic pressure transmission chamber that hydraulic oil filled, the piston unit other end extends to outside the casing and forms a pressing end that is used for connecting pressure sensor.

In one embodiment, the force-receiving unit comprises an elastic diaphragm, and the elastic diaphragm is fixed on the inner wall of the shell and is in sealing connection with the inner wall of the shell.

In one embodiment, the elastic diaphragm has a shape recessed toward the hydraulic pressure transmitting chamber.

In one embodiment, the elastic membrane is a rubber membrane.

In one embodiment, the piston unit further comprises a piston body and a sealing ring, the piston body is slidably connected inside the housing, the sealing ring is disposed between the piston body and the inner wall of the housing, and the pressing end is fixed on the piston body.

In one embodiment, the piston body includes two blocking pieces and a fixing bolt, the two blocking pieces are located at two ends of the sealing ring, and the fixing bolt penetrates through the two blocking pieces.

In one embodiment, the pressing end is provided with a limit groove for connecting the pressure sensor.

In one embodiment, the hydraulic transfer chamber is disposed in a first chamber and a second chamber having an inner diameter greater than the inner diameter of the first chamber.

In one embodiment, the housing is provided with a cover, and the cover is fixed to the liquid inlet chamber in a direction in which the fluid to be measured enters.

In one embodiment, an annular groove is formed in the inner wall of the housing of the liquid inlet cavity, and the housing cover is detachably fixed to the annular groove.

Compared with the prior art, the utility model has the beneficial effects that:

the hydraulic force transmission device adopts an internal piston type design, so that the problem that the pressure gauge is damaged by fluid after the rubber diaphragm is damaged is solved, the rubber diaphragm is responsible for transmitting pressure, the internal piston converts the pressure of the fluid into upward power to the pressure sensor, and even if the rubber diaphragm is damaged, the internal piston can block the fluid to be measured from entering the pressure sensor, so that the pressure gauge is prevented from being damaged by the fluid.

Drawings

FIG. 1 is a schematic illustration of a hydraulic force transfer device provided by the utility model;

FIG. 2 is a cross-sectional view of a hydraulic force transfer device provided by the utility model;

FIG. 3 is a cross-sectional view of a piston unit provided by the utility model;

wherein, each reference sign in the figure:

10-shell 11-shell cover 12-liquid inlet cavity

13-Hydraulic Transmission Chamber 121-annular groove 131-first Chamber

132-second chamber 20-piston unit 21-pressing end

22-piston body 23-sealing ring 211-limiting groove

221-baffle 222-fixing bolt 30-stress unit

31-elastic diaphragm

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

The utility model provides a hydraulic force transmission device, which is used for connecting a pressure sensor to measure fluid pressure, and comprises a shell 10, a piston unit 20 and a force receiving unit 30, wherein the force receiving unit 30 is embedded in the shell 10 and separates a cavity in the shell 10 to form a liquid inlet cavity 12 and a hydraulic transmission cavity 13 which are used for communicating fluid to be measured, one end of the piston unit 20 is embedded in the hydraulic transmission cavity 13 and is in sealing sliding connection with the inner wall of the hydraulic transmission cavity 13, the piston unit 20, the force receiving unit 30 and the shell 10 are enclosed to form a hydraulic transmission cavity 13 for filling hydraulic oil, and the other end of the piston unit 20 extends out of the shell 10 and forms a pressing end 21 for connecting the pressure sensor.

Specifically, this hydraulic pressure force transfer device adopts inside piston formula design, has solved the damaged back fluid of rubber diaphragm and has damaged the manometer, and rubber diaphragm is responsible for conducting pressure, and inside piston converts the pressure of fluid into ascending power and gives pressure sensor, even rubber diaphragm is damaged, and inside piston can block the measured fluid and get into pressure sensor, just so avoided the fluid to damage the manometer.

In the working process of the hydraulic force transmission device, fluid impacts the force receiving unit 30, the force receiving unit 30 obtains force from the fluid and drives hydraulic oil in the hydraulic transmission cavity 13 to store force for extrusion, and because the hydraulic transmission cavity 13 is closed, the hydraulic oil has to be extruded towards the direction of the movable piston unit 20 after reaching a certain extrusion degree, the piston unit 20 is pushed up by the extrusion degree, and the pressing end 21 fixed at the end part of the piston unit 20 achieves the aim of pressing the sensor, so that the effect that the fluid cannot thoroughly contact the pressure sensor is achieved.

In this embodiment, further, the force receiving unit 30 includes an elastic diaphragm 31, and the elastic diaphragm 31 is fixed to the inner wall of the housing 10 and is connected with the inner wall of the housing 10 in a sealing manner. Specifically, the elastic diaphragm 31 is mainly used for isolating the fluid to be measured, protecting the pressure measuring device from being repeatedly used and preventing the fluid from entering the pressure measuring device to cause damage.

In the present embodiment, further, the elastic diaphragm 31 has a shape recessed toward the hydraulic pressure transmitting chamber 13. Specifically, the design of concave elastic diaphragm 31 on the one hand holds more fluid, can make the measuring result more comprehensive, and on the other hand, elastic diaphragm 31's ductility is bigger, and for planar elastic diaphragm 31, the degree of frustration is wider, is difficult for damaging.

In this embodiment, further, the elastic diaphragm 31 is a rubber diaphragm. Specifically, the elastic diaphragm 31 is made of various materials, the elastic diaphragm 31 which is matched with the elastic diaphragm can be replaced according to the use condition, meanwhile, the arrangement of the elastic diaphragm 31 and the hydraulic transmission cavity 13 can be canceled, fluid can directly strike and squeeze the piston unit 20, the sealing ring 23 of the piston unit 20 is fixed, and the situation that the fluid cannot enter the pressure sensor can be realized.

In this embodiment, further, the piston unit 20 further includes a piston main body 22 and a sealing ring 23, the piston main body 22 is slidably connected to the inside of the housing 10, the sealing ring 23 is disposed between the piston main body 22 and the inner wall of the housing 10, and the pressing end 21 is fixed to the piston main body 22.

Specifically, the thickness of the piston main body 22 in the design cannot be larger than that of the cavity of the housing 10, so that the piston main body 22 is required to be ensured to smoothly slide back and forth in the cavity of the housing 10; the weight of the piston main body 22 is not easy to be overweight, the volume is not easy to be oversized, the difficulty in pushing the piston main body 22 caused by the weight or the volume is avoided, the detection result is insensitive, and the metal materials with lighter weight and corrosion resistance are favored in the material selection; the sealing ring 23 may also be disposed at an end of the piston main body 22 connected to the hydraulic pressure transmission chamber 13, so that the sealing ring 23 not only prevents leakage of hydraulic oil, but also receives thrust force from the force receiving unit 30.

In this embodiment, further, the piston main body 22 includes two blocking pieces 221 and a fixing bolt 222, the two blocking pieces 221 are located at two ends of the sealing ring 23, and the fixing bolt 222 penetrates the two blocking pieces 221.

Specifically, the diameter of the baffle plate 221 is larger than the inner diameter of the telescopic opening of the piston main body 22, the baffle plate 221 can only be taken out from the liquid inlet cavity 12, and the situation that the piston falls off after moving to the limit is prevented, so that the limiting effect is achieved; in the movement of the piston unit 20, the baffle 221 can be canceled, after the sealing ring 23 is directly fixed at one end of the piston main body 22, the thrust of the force receiving unit 30 is received, in the process of disassembling the piston main body 22, the liquid inlet cavity 12 of the hydraulic force transmission device is required to be downward, the hydraulic oil in the hydraulic force transmission cavity 13 is prevented from flowing out, if the hydraulic oil is found to be reduced, the hydraulic oil can be added from the movement end of the piston main body 22 in time, and the accuracy of the piston force is ensured; the piston main body 22 can be disconnected with the baffle plate 221 through the fixing bolt 222, so that the detachable piston main body 22 is realized, and different pressing ends 21 are replaced according to pressure detection under different conditions, so that the structure inside the shell 10 is not damaged, and the convenience and the rapidness are realized; meanwhile, in the process of disassembling the piston main body 22, the sealing performance of the hydraulic transmission cavity 13 is not opened, and the adverse factors that hydraulic oil is stuck out by the piston main body 22 and affects the hydraulic environment are avoided.

In this embodiment, further, the pressing end 21 is provided with a limit groove 211 for connecting with a pressure sensor.

Specifically, in the process of measuring pressure by fluid, the magnitude that the dynamics drove probably can lead to hydraulic pressure force transfer device to convey not in place, the spare part is not hard up appears, press deviating inaccurately, the condition such as clamping shell appears, in order to avoid the emergence of above-mentioned problem, guarantee the synchronism of pressure sensor and piston unit 20 atress, press the end 21 can design the spacing recess 211 of screw thread and consolidate with pressure sensor's connection, press the end 21 to be provided with different spacing recess 211, be convenient for connect different pressure sensor, in addition, the connected mode can also change into welding, joint etc. guarantee that pressure sensor is accurate receives the thrust of pressing end 21.

In this embodiment, further, the hydraulic transmission chamber 13 is disposed in the first chamber 131 and the second chamber 132, and the inner diameter of the second chamber 132 is larger than that of the first chamber 131. Specifically, the inside of the hydraulic transmission cavity 13 may be designed into a slope or a step shape by narrowing, and the hydraulic oil is presented in the hydraulic transmission cavity 13, so that a large amount of pressure brought by fluid is sensed and absorbed from the wide end close to the elastic diaphragm 31, and the scattered pressure is converged into a thrust by the specificity of the fluid and the cavity only toward the narrow end, thereby pushing the piston unit 20 to collide with the pressure sensor.

In this embodiment, further, the housing 10 is provided with a housing cover 11, and the housing cover 11 is fixed to the liquid inlet chamber 12 in a direction in which the fluid to be measured enters. Specifically, the design of cap 11 is in order to better fixed elastic diaphragm 31 guarantee not to drop on the one hand, and two aspects are in order to be convenient for connect the device of transmission fluid, and the cap 11 center of feed liquor chamber 12 is provided with the hexagonal hole, and different fluids need the inside elastic diaphragm 31 of specific drainage device entering casing 10, including the linking of being convenient for the pressure lock, avoid pressure too big, cause the disconnection of hydraulic pressure force transfer device and drainage link, must consolidate the normal operating of feed liquor chamber 12, and the hexagonal hole that cap 11 center set up has not only consolidated the firm of feed liquor chamber 12, still does not influence the normal business turn over elastic diaphragm 31 of fluid.

In this embodiment, further, an annular groove 121 is provided on the inner wall of the housing 10 of the liquid inlet chamber 12, and the housing cover 11 is detachably fixed to the annular groove 121. Specifically, the ring groove 121 may be designed with threads or may be designed with a buckle, so that the shell cover 11 is ensured to be firmly connected to the shell 10 without falling off in the measurement process, in addition, in terms of design, a protective cover may be added, and in the unused process, the protective cover seals one end of the liquid inlet cavity 12, so that impurities are prevented from entering and damaging the elastic membrane 31, and the elastic membrane is removed and opened when the elastic membrane is needed to be used.

In this embodiment, further, a rubber ring is disposed on one side of the housing 10 close to the sensor, so as to improve the tightness between the hydraulic force transmission device and the sensor. Specifically, the shell 10 is widened and thickened at one side of the shell 10, which is close to the sensor, and the contact area between the shell 10 and the pressure sensor is increased, so that the fluid pressure borne by the shell 10 is better counteracted, meanwhile, the addition of the rubber ring relieves the adverse effect caused by vibration among metal parts, and the measuring error effect caused by additional uncertain force in the pressure measuring process is counteracted.

In the process of measuring the fluid pressure, in order to realize the piston movement, it is necessary to ensure that the stress of the shell 10 is opposite to the stress direction of the piston unit 20, and the shell 10 and the piston cannot move in the same direction, so that the fluid pressure born by the shell 10 needs to be stabilized by using a fixing hole, and the shell 10 is fixedly connected with the pressure sensor through the fixing hole, so that the pressure sensor helps the shell 10 to offset the pressure brought by the fluid, and only the required only pressure inside the shell 10 is realized to push the piston unit 20 to move towards the pressure sensor.

The specific working process of the utility model is as follows: in the operation process of the hydraulic force transmission device, the fluid firstly contacts with the shell cover 11 of the inlet, the fluid enters the liquid inlet cavity 12 in the elastic diaphragm 31 after being drained through the shell cover 11 and fills the surface of the elastic diaphragm 31, the elastic diaphragm 31 deforms after being stressed and drives the hydraulic oil in the hydraulic transmission cavity 13 at the other side of the elastic diaphragm 31 to extrude the oil body, because the inside of the hydraulic transmission cavity 13 only has a movement space, namely the oil body extrusion is stressed towards the piston unit 20, and the inclined angle of the inner wall of the upper shell 10 is matched, the hydraulic oil which is scattered and stressed originally can push the baffle plate 221 of the piston unit 20 more intensively, the baffle plate 221 pushes the piston main body 22 to move towards the direction of the pressure sensor after being pushed, the pressing end 21 at the other side of the piston main body 22 moves along with the movement of the piston main body 22, and the pressure sensor detects the pressure of the measured fluid according to the movement intensity of the pressing end 21 in threaded connection with the pressure sensor.

The above-described embodiments of the present utility model do not limit the scope of the present utility model. Any other corresponding changes and modifications made in accordance with the technical idea of the present utility model shall be included in the scope of the claims of the present utility model.

Claims

1. The utility model provides a hydraulic pressure force transfer device for connect pressure sensor and measure fluid pressure, its characterized in that includes casing, piston unit and atress unit, the atress unit embedded in the casing and with the cavity in the casing separates and forms a feed liquor chamber and a hydraulic pressure transmission chamber that are used for the fluid that awaits measuring, piston unit one end is built-in the hydraulic pressure transmission chamber and with the sealed sliding connection of hydraulic pressure transmission intracavity wall, just piston unit atress unit with the casing encloses and closes and form and supply hydraulic pressure transmission chamber that hydraulic oil filled, the piston unit other end extends to outside the casing and forms a pressing end that is used for connecting pressure sensor.

2. The hydraulic force transfer device of claim 1, wherein the force receiving unit comprises an elastic diaphragm secured to and sealingly connected to the inner wall of the housing.

3. A hydraulic force transfer device according to claim 2, characterized in that the elastic membrane has a shape recessed in the direction of the hydraulic transfer chamber.

4. The hydraulic force transfer device of claim 2, wherein the elastic diaphragm is a rubber diaphragm.

5. The hydraulic force transfer device of claim 1, wherein the piston unit further comprises a piston body slidably coupled within the housing and a seal ring disposed between the piston body and an inner wall of the housing, the pressing end being secured to the piston body.

6. The hydraulic force transfer device of claim 5, wherein the piston body includes two flaps at both ends of the seal ring and a fixing bolt penetrating the two flaps.

7. The hydraulic force transfer device of claim 1, wherein the pressing end is provided with a limit groove for connecting the pressure sensor.

8. The hydraulic force transfer device of claim 1, wherein the hydraulic transfer chamber is disposed in a first chamber and a second chamber having an inner diameter greater than the first chamber inner diameter.

9. The hydraulic force transfer device according to claim 1, wherein the housing is provided with a cover, which is fixed to the liquid inlet chamber in the direction of the fluid to be measured.

10. The hydraulic force transfer device of claim 9, wherein the inner wall of the housing of the liquid inlet chamber is provided with a ring groove, and the housing cover is detachably fixed to the ring groove.