CN206231597U - Can be used for the pressure compensator of underwater environment - Google Patents

Abstract

The utility model relates to underwater robot engineering equipment, in particular to a pressure compensation device which can be used in underwater environment. The open end of the leather bag is installed between the sleeve and the end cover, and the bottom of the leather bag is installed on the piston through the leather bag gland. One end of the linear displacement sensor is installed on the end cover, and the other end passes through the bladder gland and the piston in turn. The sensor sleeve is set on the linear displacement sensor by the other end of the linear displacement sensor, and is connected with the piston. The displacement sensor slides reciprocally; the spring is set on the sensor sleeve, one end is connected to the piston, and the other end is connected to the bottom of the sleeve. There is a water inlet hole on the sleeve, and the end cover is installed to inject compensation oil into the pressure compensation device. When the external seawater pressure changes, the piston drives the leather bag to reciprocate and slide along the axial direction of the piston to realize pressure compensation. The utility model has the advantages of compact structure, high reliability, high precision, and can work in the whole sea depth.

Description

Pressure compensation device for underwater environment

technical field

The utility model relates to underwater robot engineering equipment, in particular to a pressure compensation device which can be used in underwater environment.

Background technique

At present, in the field of underwater robots, the compensation system has become one of the indispensable units of underwater robots. The pressure compensation device is the core component of the compensation system to realize the balance between the internal pressure of the oil-filled structure and the external seawater pressure. The existing pressure compensation device There are bladder type, metal film type and bellows type, etc., which are of great significance in the field of underwater robots.

Utility model content

The purpose of the utility model is to provide a pressure compensation device which can be used in underwater environment. The pressure compensation device adopts a spring-piston structure to guide the movement of the bladder, which can realize accurate and real-time monitoring of the compensation oil volume. This type of pressure compensation device has a more compact structure and higher accuracy.

The purpose of this utility model is achieved through the following technical solutions:

The utility model comprises a sealingly connected sleeve, an end cap, and a leather bag, a leather bag gland, a piston, a linear displacement sensor, a sensor sleeve, and a spring respectively accommodated in the space enclosed by the sleeve and the end cap, wherein the opening of the leather bag The end is installed between the sleeve and the end cover, the bottom of the bladder is installed on the piston through the bladder gland, one end of the linear displacement sensor is installed on the end cover, and the other end passes through the The bladder gland and the piston, the sensor sleeve is sleeved on the linear displacement sensor by the other end of the linear displacement sensor, and is connected with the piston, and slides back and forth with the piston relative to the linear displacement sensor; the spring is sleeved on the sensor sleeve On the cylinder, one end is connected to the piston, and the other end is connected to the bottom of the sleeve. A water inlet hole is opened on the sleeve, and a device for injecting compensation oil into the pressure compensation device is installed on the end cover. A pipe joint, the piston drives the leather bag to reciprocate and slide along the axial direction of the piston to realize pressure compensation when the external seawater pressure changes;

Wherein: the middle part of the bottom of the sleeve extends axially inward to form a hollow extension, the other end of the linear displacement sensor and the other end of the sensor sleeve are inserted into the extension, and the spring covers the sensor On the sleeve and the extension part; the axial section of the piston is "concave" shape, the piston, the bladder gland, and the sensor sleeve together form a moving part, and the movement space formed with the sleeve realizes the guidance of the spring;

Sealing rings for isolating compensating oil and seawater are respectively installed between the piston and the bladder and between the piston and the sensor sleeve;

One end of the linear displacement sensor is fixed inside the end cap through the sensor gland, and the slip ring of the linear displacement sensor is connected with the inner wall of the sensor sleeve and slides with the sensor sleeve;

A watertight connector and an exhaust valve are respectively installed on the end cover.

Advantage and positive effect of the present utility model are:

1. Compact structure and high reliability: the utility model builds the linear displacement sensor inside the compensation device to avoid occupying additional installation space, and the linear displacement sensor is placed in the compensation oil to avoid sensor failure caused by the external environment. In the deep sea environment With higher reliability.

2. High precision: The spring and piston in the utility model guide the movement of the leather bag, and convert the compensation oil volume change into the piston displacement change, which can realize real-time continuous detection and high monitoring precision.

3. It can work in the whole sea depth: the utility model has a built-in linear displacement sensor, and there is no need to design a separate compartment for the linear displacement sensor, so the utility model can work in the whole sea depth.

Description of drawings

Fig. 1 is a sectional view of the internal structure of the utility model;

Fig. 2 is the left view of Fig. 1;

Fig. 3 is a cross-sectional view of the internal structure of the utility model after injecting compensating oil;

Fig. 4 is A-A sectional view among Fig. 3;

Among them: 1 is the bladder, 2 is the sleeve, 3 is the end cap, 4 is the cover of the bladder, 5 is the piston, 6 is the linear displacement sensor, 7 is the sensor cover, 8 is the watertight connector, 9 is the exhaust valve, 10 is a pipe joint, 11 is a sensor sleeve, 12 is a spring, 13 is an extension, 14 is a water inlet, and 15 is a slip ring.

detailed description

Below in conjunction with accompanying drawing, the utility model is described in further detail.

As shown in Figures 1 to 4, the utility model includes a bladder 1, a sleeve 2, an end cover 3, a bladder gland 4, a piston 5, a linear displacement sensor 6, a sensor gland 7, a watertight connector 8, and an exhaust valve 9 , pipe joint 10, sensor sleeve 11 and spring 12, wherein the sleeve 2 is in sealing connection with the end cover 3, the bladder 1, the bladder gland 4, the piston 5, the linear displacement sensor 6, the sensor sleeve 11 and the spring 12 are all accommodated In the space enclosed by the sleeve 2 and the end cover 3, the sealing flange at the opening end of the bladder 1 is installed between the sleeve 2 and the end cover 3, and the bottom of the bladder 1 is fixed on the piston 5 through the bladder gland 4, and through The guiding effect of the piston 5 converts the volume change of the compensation oil into a displacement change, thereby realizing accurate measurement of the volume of the compensation oil. One end of the linear displacement sensor 6 is fixed inside the end cap 3 through the sensor gland 7, and the other end passes through the bladder gland 4 and the piston 5 in sequence. The sensor sleeve 11 is sleeved on the linear displacement sensor 6 by the other end of the linear displacement sensor 6 , is connected with the piston 5 , and slides back and forth with the piston 5 relative to the linear displacement sensor 6 . The slip ring 15 of the linear displacement sensor 6 is connected with the inner wall of the sensor sleeve 11 and slides with the sensor sleeve 11 .

The middle part of the bottom of the sleeve 2 extends axially inward to form a hollow extension 13 , and the other end of the linear displacement sensor 6 and the other end of the sensor sleeve 11 are both inserted into the extension 13 . The spring 12 is sleeved on the sensor sleeve 11 and the extension part 13 , one end is connected with the piston 5 , and the other end is connected with the bottom of the sleeve 2 . A water inlet hole 14 is opened at the bottom of the sleeve 2 and around the extension part 13 . The axial section of the piston 5 is "concave". The piston 5 forms a moving part together with the bladder gland 4 and the sensor sleeve 11, and the movement space formed with the sleeve 2 can realize the guiding function of the spring 12. Between the piston 5 and the bladder 1 and between the piston 5 and the sensor sleeve 11 are respectively installed sealing rings for isolating compensation oil and sea water.

A watertight connector 8 , an exhaust valve 9 and a pipe joint 10 for injecting compensating oil into the pressure compensation device are respectively installed on the end cover 3 , and the watertight connector 8 is electrically connected with the linear displacement sensor 6 .

The working principle of the utility model is:

Inject compensation oil into the compensation device through the pipe joint 10, the compensation oil overcomes the pressure of the spring 12 and drives the piston 5 to move to the right, the spring 12 is compressed under the guidance of the piston 5, the sleeve 2 and other components, and the compensation oil is stored in the bladder 1 In the closed space formed with the end cover 3, the air above the compensation oil is exhausted through the exhaust valve 9, as shown in Figure 3.

The utility model communicates with other compensated mechanisms through the pipe joint 10 . When the underwater robot dives, the pressure of the external seawater of the utility model continues to rise, and the seawater enters the sleeve 2 through the water inlet 14, and the pressure acts on the piston 5, the volume of the compensation oil is compressed, and the piston 5 moves to the left , to achieve the balance between the internal pressure of the compensation device and the external seawater pressure, as shown in Figure 1. Conversely, when the underwater robot floats up, the external seawater pressure decreases, the volume of compensation oil increases, and the piston 5 is pushed to move to the right, so as to keep the internal and external pressure balance of the compensation device all the time. The linear displacement sensor 6 can continuously detect the oil level in real time, and the signal of the linear displacement sensor is transmitted to the monitoring system through the watertight connector 8 .

The utility model provides a pressure compensation device which can be used in the underwater environment. It has many advantages such as compact structure, high reliability, high precision, and can work in the whole sea depth, and provides a reliable pressure compensation device.

Claims (6)

1. A pressure compensating device that can be used in an underwater environment is characterized in that: it includes a sleeve (2) that is sealed and connected, an end cover (3) and is respectively accommodated in the sleeve (2) and the end cover (3) The bladder (1), the bladder gland (4), the piston (5), the linear displacement sensor (6), the sensor sleeve (11), and the spring (12) in the enclosed space, wherein the open end of the bladder (1) is installed Between the sleeve (2) and the end cap (3), the bottom of the bladder (1) is mounted on the piston (5) through the bladder gland (4), and the linear displacement sensor (6 ) is installed on the end cover (3), and the other end passes through the bladder gland (4) and the piston (5) successively, and the sensor sleeve (11) is covered by the other end of the linear displacement sensor (6) On the linear displacement sensor (6), it is connected with the piston (5), and slides back and forth with the piston (5) relative to the linear displacement sensor (6); the spring (12) is sleeved on the sensor sleeve (11) One end is connected to the piston (5), the other end is connected to the bottom of the sleeve (2), and a water inlet hole (14) is opened on the sleeve (2), and the end cover (3) A pipe joint (10) that injects compensation oil into the pressure compensation device is installed on the top, and the piston (5) drives the bladder (1) to reciprocate and slide along the axial direction of the piston (5) to realize the pressure when the external seawater pressure changes. compensate. 2. The pressure compensation device applicable to underwater environments according to claim 1, characterized in that: the middle part of the bottom of the sleeve (2) extends axially inward to form a hollow extension (13), The other end of the linear displacement sensor (6) and the other end of the sensor sleeve (11) are all inserted into the extension (13), and the spring (12) is sleeved on the sensor sleeve (11) and the extension (13). )superior. 3. The pressure compensation device that can be used in underwater environment according to claim 2, characterized in that: the axial section of the piston (5) is "concave" shape, the piston (5) and the bladder gland (4 ), the sensor sleeve (11) together constitute the moving part, and the movement space formed with the sleeve (2) realizes the guidance of the spring (12). 4. The pressure compensation device applicable to underwater environment according to claim 1, characterized in that: between the piston (5) and the bladder (1) and between the piston (5) and the sensor sleeve (11) Sealing rings for isolating compensating oil and sea water are respectively installed. 5. The pressure compensation device applicable to underwater environment according to claim 1, characterized in that: one end of the linear displacement sensor (6) is fixed inside the end cover (3) through the sensor gland (7), The slip ring (15) of the linear displacement sensor (6) is connected with the inner wall of the sensor sleeve (11) and slides with the sensor sleeve (11). 6 . The pressure compensation device applicable to underwater environment according to claim 1 , characterized in that: the end cover ( 3 ) is respectively equipped with a watertight connector ( 8 ) and an exhaust valve ( 9 ).