CN205472798U - Fluid pressure can recovery unit based on rotation type special -shaped axis end face seal switch - Google Patents

Abstract

The utility model relates to the technical field of liquid pressure energy recovery equipment, in particular to a liquid pressure energy recovery device based on a rotary special-shaped shaft end face seal switch. The first switcher and the second switcher of the liquid pressure energy recovery device based on the rotary special-shaped shaft end face seal switcher are connected through a pipeline group; the first switcher and the second switcher both include a casing and a special-shaped shaft, and the special-shaped shaft It can be rotatably assembled in the shell so that two separate cavities are formed in the shell; the two cavities of the first switcher pass through the first connecting pipeline and the second connecting pipeline of the pipeline group and the second connecting pipeline respectively. The two cavities of the switcher are connected, and the liquid switching is completed through the rotation of the special-shaped shaft, so as to realize the recovery and reuse of the pressure energy of the high-pressure liquid. The switching process is stable, low noise, safe and reliable, and can be adapted to various control schemes.

Description

Liquid pressure energy recovery device based on rotary special-shaped shaft end face seal switch

technical field

The utility model relates to the technical field of liquid pressure energy recovery equipment, in particular to a liquid pressure energy recovery device based on a rotary special-shaped shaft end face seal switch.

Background technique

In many industrial fields such as reverse osmosis seawater (or brackish water) desalination, sewage treatment, synthetic ammonia, etc., there are common methods of direct discharge or throttling of high-pressure liquids. This treatment method does not effectively utilize the pressure of high-pressure liquids and can cause huge energy waste. , the energy consumption of the system is greatly increased. For example, the operating pressure of reverse osmosis seawater desalination is 6-8MPa, and the pressure of the high-pressure concentrated brine discharged from the reverse osmosis membrane is still as high as 5-6.5MPa. The loss caused by direct discharge of this part of energy accounts for about 30-50% of water control cost and 75% of operation cost. The addition of a liquid pressure energy recovery device can efficiently recover and utilize the pressure energy of the discharged high-pressure liquid, greatly reducing system energy consumption.

At present, the most advanced liquid pressure energy recovery device is the positive displacement type. The main principle is to use the incompressibility of liquid to realize direct contact between high and low pressure liquids, complete the "pressure energy-pressure energy" transmission and realize the recovery function of pressure energy. The existing positive displacement devices mainly include rotor type and work exchange type. Among them, the representative product of the rotor type device is PX (English full name is PressureExchanger), and its rotor needs to rotate up to 1500rpm to realize the recovery function, resulting in high working noise and difficult sealing of this type of device, and the processing requirements of the device are harsh. Poor adaptability to flow requirements. The representative product of the power exchange device is DWEER (English full name is Dual Work Exchange Energy Recovery). This type of product is equipped with an isolation piston in the pressure exchange cylinder to reduce the mixing of liquids. The isolation piston increases the difficulty of control, and the control system is complex and safe. Low performance, in addition, the initial investment of such devices is high and maintenance is inconvenient.

In view of the shortcomings of the current liquid pressure energy recovery device in the above background technology, the utility model proposes a liquid pressure energy recovery device based on a rotary special-shaped shaft end face seal switch.

Utility model content

(1) Technical problems to be solved

The technical problem to be solved by the utility model is to provide a liquid pressure energy recovery device based on a rotary special-shaped shaft end face seal switch, which has a simple structure, is easy to operate, and has good sealing performance and liquid pressure energy recovery efficiency.

(2) Technical solution

In order to solve the above technical problems, the utility model provides a liquid pressure energy recovery device based on a rotary special-shaped shaft end face seal switch, including a first switch and a second switch connected through a pipeline group;

Both the first switcher and the second switcher include a casing and a special-shaped shaft, the casing is a hollow cylindrical cavity, and the special-shaped shaft is rotatably assembled in the casing, so that the hollow cylindrical cavity in the casing forms a Two mutually isolated cavities, the side wall of one of the cavities of the shell is provided with a first sealing hole, the third sealing hole and the first connecting hole, and the side wall of the other cavity is provided with a first sealing hole. Two sealing holes, the fourth sealing hole and the second connecting hole, the first sealing hole and the third sealing hole are coaxial, the second sealing hole and the fourth sealing hole are coaxial, the axis of the first sealing hole is connected with the second sealing hole The axes of the holes are parallel to each other and on the same plane as the axis of the housing. Both the first connection hole and the second connection hole are used to communicate with the first switcher and the second switcher. The first connection hole and the second switcher The axes of the two connecting holes are parallel to each other and have a difference of 90° from the axis of the first sealing hole. The first connecting hole and the second connecting hole are on the same side of the plane formed by the axis of the first sealing hole and the axis of the second sealing hole. A first shaft hole and a second shaft hole are respectively opened in the centers of the two end faces of the casing;

The first sealing hole, the second sealing hole, the third sealing hole and the fourth sealing hole all include a hole sleeve, a sealing cylinder and a spring, and the sealing cylinder is set in the hole sleeve through the spring, and can pass through the hole sleeve compressing the spring for reciprocating motion;

The hole sleeve is a cylindrical cavity, one end face is fully open, and a liquid pipe hole is opened in the center of the other end face, and the end face is also provided with a hole ring groove inside the cavity, and the hole ring groove is It is arranged coaxially with the hole sleeve, and a hole spring seat is arranged along the center line of the circular groove of the hole sleeve, and an annular sealing surface is formed between the liquid pipe hole and the hole ring groove, and the hole sleeve There are also radial through holes on the side;

One end surface of the sealing cylinder is provided with a sealing cylinder annular groove corresponding to the annular groove of the hole sleeve, the sealing cylinder annular groove is coaxially arranged with the sealing cylinder, and the sealing cylinder annular groove is circumferentially A sealing cylindrical spring seat corresponding to the spring seat of the hole sleeve is arranged on the center line of the center line. A circular sealing surface is arranged in the annular groove of the sealing cylinder. When the sealing cylinder reciprocates in the hole sleeve, the Compressing the spring can make the annular sealing surface contact with the circular sealing surface to realize end face sealing;

The middle part of the special-shaped shaft is arranged with an isolation cylinder for isolating the inside of the housing into two cavities. On both sides of the isolation cylinder, a first switching shaft and a second switching shaft are respectively arranged. The first switching shaft Both the shaft and the second switching axis are composed of a semi-cylindrical and a semi-elliptical cylinder radially connected, the diameter of the semi-cylindrical is equal to the length of the minor axis of the semi-elliptic cylinder, the center of the axial section of the semi-cylindrical and the axis of the semi-elliptic cylinder Coinciding with the center of the section, and located on the axis of the first switching axis and the second switching axis at the same time, the phase difference between the first switching axis and the second switching axis is 180°, and the first switching axis and the second switching axis The shafts are coaxially arranged with the isolation cylinder; the first fixed shaft and the second fixed shaft are respectively arranged at the center of the end faces of the first switching shaft and the second switching shaft, and the first fixed shaft and the second fixed shaft can be respectively assembled in the first shaft hole and the second shaft hole;

The pipeline group includes a first connection pipeline and a second connection pipeline, the first connection hole of the first switch communicates with the first connection hole of the second switch through the first connection pipeline, and the first connection hole communicates with the first connection hole of the second switch through the first connection pipeline. The second connection hole of a switcher communicates with the second connection hole of the second switcher through a second connection pipeline.

Further, the inner diameter of the shell is equal to the diameter of the isolation cylinder.

Further, the diameter of the sealing cylinder is equal to the inner diameter of the sleeve, and the axial length of the sealing cylinder is greater than the axial length of the inner cavity of the sleeve.

Further, the annular sealing surface and the circular sealing surface are set as a plane or a conical plane at the same time.

Further, the first switching axis and the second switching axis are equal in size.

Further, the first fixed shaft is connected with the output shaft of the motor, and drives the special-shaped shaft to rotate in the housing.

Further, the flow areas of the liquid pipe hole, the radial through hole, the first connecting hole and the second connecting hole are all equal, and the sizes of the first switcher and the second switcher are equal.

(3) Beneficial effects

The above-mentioned technical solution of the utility model has the following beneficial effects: the liquid pressure energy recovery device based on the rotary special-shaped shaft end face seal switch of the utility model includes a first switch and a second switch connected through a pipeline group; Both the switcher and the second switcher include a casing and a special-shaped shaft, and the special-shaped shaft is rotatably assembled in the casing, so that two cavities isolated from each other are formed in the casing; the two cavities of the first switcher are respectively passed through pipelines The first connecting pipeline and the second connecting pipeline of the group communicate with the two cavities of the second switcher and complete the liquid switching through the rotation of the special-shaped shaft, thereby realizing the recovery and reuse of the pressure energy of the high-pressure liquid, which has a simple structure , The advantages of easy processing and debugging and later maintenance, each sealing hole is sealed by the end face, has a good sealing effect and pressure energy recovery efficiency, and the switching mode of the special-shaped shaft is flexible, especially when rotating, it can cooperate with each sealing hole, so that The whole switching process is stable, low noise, safe and reliable, and can be adapted to various control schemes.

Description of drawings

Fig. 1 is the assembly diagram of the switcher of the utility model embodiment;

Fig. 2 is the structural representation of the shell of the utility model embodiment;

Fig. 3 is a side view of the housing of the utility model embodiment;

Fig. 4 is the structural representation of the hole sleeve of the utility model embodiment;

Fig. 5 is the bottom view of the hole sleeve of the utility model embodiment;

Fig. 6 is a structural schematic diagram of a sealing cylinder according to an embodiment of the present invention;

Fig. 7 is a top view of the sealing cylinder of the utility model embodiment;

Fig. 8 is the front view of the special-shaped shaft of the utility model embodiment;

Fig. 9 is a side view of the special-shaped shaft of the utility model embodiment;

Fig. 10 is a working principle diagram of the liquid pressure energy recovery device according to the embodiment of the present invention (the special-shaped shaft is in the initial position);

Fig. 11 is a working principle diagram of the liquid pressure energy recovery device of the embodiment of the present invention (the position where the special-shaped shaft is rotated by 180°).

Among them, 1. The first sealing hole; 2. The second sealing hole; 3. The third sealing hole; 4. The fourth sealing hole; 5. Hole sleeve; 6. Sealing cylinder; 7. Spring; 8. Liquid pipe hole; 9. Hole sleeve ring groove; 10. Hole sleeve spring seat; 11. Annular sealing surface; 12. Radial through hole; 13. Sealing cylinder ring groove; 14. Sealing cylinder spring seat; 15. Circular sealing surface; 16. The first connecting hole; 17. The second connecting hole; 18. The first shaft hole; 19. The second shaft hole; 20. Isolation cylinder; 21. The first switching shaft; 22. The second switching shaft; 23. The second 1 fixed shaft; 24, the second fixed shaft; 25, the first connecting pipeline; 26, the second connecting pipeline; 27, high-pressure concentrated brine; 28, low-pressure seawater; 29, high-pressure seawater; 30, low-pressure brine; 1 ', the first sealing hole of the second switcher; 2', the second sealing hole of the second switcher; 3', the third sealing hole of the second switcher; 4', the fourth sealing hole of the second switcher ; 16', the first connection hole of the second switcher; 17', the second connection hole of the second switcher.

detailed description

The implementation of the present utility model will be further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the utility model, but cannot be used to limit the scope of the utility model.

In the description of the present invention, unless otherwise specified, the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head ", "tail" and other indicated orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific Orientation, construction and operation in a specific orientation, and therefore should not be construed as limiting the utility model. In addition, the terms "first", "second", "third" and "fourth", etc. are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

The liquid pressure energy recovery device based on the rotating special-shaped shaft end face seal switch provided by this embodiment includes a first switch, a second switch and a pipeline group, and the first switch and the second switch are communicated through the pipeline group. Both the first switcher and the second switcher include a casing and a special-shaped shaft, and the special-shaped shaft is rotatably assembled in the casing, so that two mutually isolated cavities are formed in the casing; the two cavities of the first switcher pass through the The first connecting pipeline 25 and the second connecting pipeline 26 of the pipeline group are in communication with the two cavities of the second switcher, and the rotation of the special-shaped shaft ensures that the liquid pressure is carried out when the liquid passes from the first switcher to the second switcher. Conversion, so as to realize the recovery and reuse of the pressure energy of the high-pressure liquid. Its structure is simple, it is convenient for processing and debugging and later maintenance, it has good sealing effect and pressure energy recovery efficiency, the switching process is stable, the noise is low, safe and reliable, and it can adapt to a variety of Control plan.

As shown in Figure 1, the first switcher and the second switcher in this embodiment have the same structure, both including a casing and a special-shaped shaft, and the special-shaped shaft is rotatably assembled in the casing, so that two mutual Isolated cavities, wherein the side wall of one cavity is provided with the first sealing hole 1, the third sealing hole 3 and the first connection hole 16, and the side wall of the other cavity is provided with the second sealing hole 2, the second sealing hole Four sealing holes 4 and the second connecting hole 17, the first sealing hole 1 and the third sealing hole 3 are coaxially arranged, the second sealing hole 2 and the fourth sealing hole 4 are coaxially arranged, the axis of the first sealing hole 1 is in line with the first sealing hole 1 The axes of the two sealing holes 2 are parallel to each other and on the same plane as the axis of the casing. Both the first connecting hole 16 and the second connecting hole 17 are used to connect the first switch and the second switch correspondingly, that is, a cavity of the first switch passes through the first connecting hole 16 and a cavity of the second switch. The other cavity of the first switch communicates with the other cavity of the second switch through the second connection hole 17; the centers of the two end faces of the housing are also respectively opened with a first shaft hole 18 and a second shaft hole. Hole 19.

In order to ensure the stable communication between the first switcher and the second switcher and facilitate the inflow and outflow of liquid, it is preferable that the axes of the first connection hole 16 and the second connection hole 17 are parallel to each other, and the axis between the first sealing hole 1 The angle is 90°, and the first connection hole 16 and the second connection hole 17 are on the same side of the plane formed by the axis of the first sealing hole 1 and the axis of the second sealing hole 2 .

As shown in Fig. 2 and Fig. 3, the housing is a hollow cylindrical cavity, and there are four sealing holes in the housing: the first sealing hole 1, the second sealing hole 2, the third sealing hole 3 and the fourth sealing hole 4 . The four sealing holes have the same structure, and each sealing hole includes a hole sleeve 5, a sealing cylinder 6 and a spring 7, and the sealing cylinder 6 is set in the hole sleeve 5 through the spring 7, and can be compressed in the hole sleeve 5 by compressing the spring 7. Reciprocating movement, so that each sealing hole can be switched between the sealed state and the open state; in order to ensure that the reciprocating movement between the sealing cylinder 6 and the hole sleeve 5 is stable, it is preferable to evenly arrange multiple holes between the sealing cylinder 6 and the hole sleeve 5 a spring7.

As shown in Figure 4 and Figure 5, the hole sleeve 5 is a cylindrical cavity, one end face of the hole sleeve 5 is fully open, and the center of the other end face has a liquid pipe hole 8, and the end face provided with the liquid pipe hole 8 is in the hollow. The inner side of the cavity is also provided with an annular groove 9 for the hole sleeve, the annular groove 9 for the hole sleeve is arranged coaxially with the hole sleeve 5, and a hole spring seat 10 is arranged on the center line of the circumferential direction of the hole ring groove 9, and the spring 7 is assembled In the eyelet spring seat 10, the number of the eyelet spring seat 10 is equal to the number of springs 7; an annular sealing surface 11 is formed between the liquid pipe hole 8 and the eyelet annular groove 9, and the side surface of the eyelet 5 is also provided with a diameter To the through hole 12, so that when the sealing hole is in an open state, the liquid can flow in from the liquid tube hole 8 and then flow out from the radial through hole 12, or flow in from the radial through hole 12 and then flow out from the liquid tube hole 8; preferably The flow areas of the liquid pipe holes 8 and the radial through holes 12 and the first connecting hole 16 and the second connecting hole 17 on the four sealing holes are equal to ensure the conversion of liquid pressure and the flow efficiency.

As shown in Figures 6 and 7, one end surface of the sealing cylinder 6 is provided with a sealing cylinder annular groove 13 corresponding to the hole ring groove 9, and the sealing cylinder annular groove 13 is coaxially arranged with the sealing cylinder 6, and The size of the sealing cylindrical annular groove 13 is equal to the size of the hole sleeve annular groove 9; the sealing cylindrical annular groove 13 circumferential center line is arranged with a sealing cylindrical spring seat 14 corresponding to the hole sleeve spring seat 10, and the sealing cylindrical spring seat The quantity of 14 is equal to the hole spring seat 10, and the size is the same as the hole spring seat 10, so that the spring 7 is assembled between the sealing cylindrical spring seat 14 and the hole spring seat 10; the sealing cylindrical annular groove 13 is provided with When the circular sealing surface 15 and the sealing cylinder 6 reciprocate in the hole sleeve 5 , the compression spring 7 can make the annular sealing surface 11 contact with the circular sealing surface 15 to realize end face sealing.

In order to ensure the sealing effect between the sealing cylinder 6 and the hole sleeve 5, the sealing cylinder 6 is preferably a solid cylinder, the radius of the sealing cylinder 6 is equal to the inner diameter of the cavity of the hole sleeve 5, and the axial length of the sealing cylinder 6 is greater than the hole sleeve 5 The axial length of the inner cavity; the annular sealing surface 11 and the circular sealing surface 15 are preferably processed into a plane or a conical plane at the same time to ensure a good end face sealing effect between the annular sealing surface 11 and the circular sealing surface 15 .

As shown in Figure 8 and Figure 9, an isolation cylinder 20 for isolating the housing into two cavities is arranged in the middle of the special-shaped shaft, and a first switching axis 21 and a second switching axis 22 are respectively arranged on both sides of the isolation cylinder 20 , the first switching shaft 21 and the second switching shaft 22 have the same structural size; the first switching shaft 21 and the second switching shaft 22 are composed of a semi-cylindrical and a semi-elliptical cylinder connected radially, and the diameter of the semi-cylindrical is equal to the short length of the semi-elliptic cylinder Shaft length, the center of the semi-cylindrical axial section coincides with the center of the semi-elliptical cylindrical axial section, and is located on the axis of the first switching axis 21 and the second switching axis 22 at the same time, the first switching axis 21 and the second switching axis 22 The phase difference of the first switching shaft 21 and the second switching shaft 22 are set coaxially with the isolation cylinder 20; the first fixed shaft 23 is arranged at the center of the end face of the first switching shaft 21 and the second switching shaft 22 respectively and the second fixed shaft 24 , the first fixed shaft 23 and the second fixed shaft 24 can be sleeved in the first shaft hole 18 and the second shaft hole 19 respectively. The first fixed shaft 23 is connected with the output shaft of the motor, and can drive the special-shaped shaft to rotate under the drive of the motor.

In order to ensure that the special-shaped shaft is rotatably assembled in the housing and isolate the inner cavity of the housing into two cavities, it is preferable that the diameter of the inner cavity of the housing is equal to the diameter of the isolation cylinder 20 .

The pipeline group in this embodiment includes a first connecting pipeline 25 and a second connecting pipeline 26. In order to ensure the stable and reliable communication between the first switcher and the second switcher, the first connecting hole 16 of the first switcher passes through the second A connection pipeline 25 communicates with the first connection hole 16 ′ of the second switcher, and the second connection hole 17 of the first switcher communicates with the second connection hole 17 ′ of the second switcher through the second connection pipeline 26 .

When the housing is assembled with the special-shaped shaft, the spring 7 is always kept in a compressed state, and presses each sealing cylinder 6 on the first switching shaft 21 or the second switching shaft 22 on the special-shaped shaft. When the sealing cylinder 6 is in contact with the farthest side of the semi-elliptical cylinder on the first switching shaft 21 or the second switching shaft 22 from the axis, the annular sealing surface 11 is in contact with the circular sealing surface 15, that is, the sealing hole is in a sealed state. At this time, the sealing The hole is completely closed; when the sealing cylinder 6 is in contact with the upper semi-cylindrical side of the first switching shaft 21 or the second switching shaft 22, the circular sealing surface 15 does not block the radial through hole 12, that is, the sealing hole is in an open state. At this time, the sealing hole fully open.

As shown in Fig. 10 and Fig. 11, the sealing cylinder 6 on the third sealing hole 3 is in contact with the farthest side of the semi-elliptic cylinder on the first switching shaft 21 from the axis as the initial position of the special-shaped shaft; The sealing cylinder 6 is in contact with the farthest side of the semi-elliptic cylinder on the first switching shaft 21 from the axis as the position where the special-shaped shaft rotates by 180°.

When the special-shaped shaft is in the initial position, the first sealing hole 1 and the fourth sealing hole 4 of the first switch are opened, the second sealing hole 2 and the third sealing hole 3 are closed, and the first sealing hole 1' of the second switch is , the fourth sealing hole 4' is open, the second sealing hole 2' and the third sealing hole 3' are closed; when the special-shaped shaft is in the position of rotating 180°, the second sealing hole 2 and the third sealing hole of the first switch 3 is opened, the first sealing hole 1 and the fourth sealing hole 4 are closed, the second sealing hole 2' and the third sealing hole 3' of the second switch are opened, and the first sealing hole 1' and the fourth sealing hole 4' are closed .

The rotation method of the special-shaped shaft can be rotated clockwise or counterclockwise 180 ° for a period of time, and then rotated clockwise or counterclockwise 180 ° for a period of time, and then cycled; or clockwise or counterclockwise 180 ° for a period of time, and then Then rotate counterclockwise or clockwise 180° and stop for a while, and so on.

In this embodiment, the size of the first switcher and the second switcher are preferably equal, the first sealing hole 1 and the second sealing hole 2 of the first switcher are connected by a tee, and the third sealing hole 3 and the fourth sealing hole 4 are connected by Three-way communication; the first sealing hole 1' of the second switcher and the second sealing hole 2' of the second switcher are connected by a three-way, the third sealing hole 3' of the second switcher is connected with the second sealing hole 3' of the second switcher The four sealing holes 4' are connected by three links. The first connection hole 16 of the first switcher is connected to the first connection hole 16' of the second switcher by the first connection pipeline 25, and the second connection hole 17 of the first switcher is connected to the second connection hole of the second switcher. The holes 17 ′ are connected by a second connecting line 26 . When the first switcher and the second switcher are connected and working, the special-shaped shafts in the first switcher and the second switcher are at the initial position or at the position rotated by 180° at the same time.

When the liquid pressure energy recovery device is recovering the liquid pressure energy, one tee of the first switcher flows into the high-pressure recovery liquid with pressure energy, and the other flows into the low-pressure liquid that needs to be pressurized; The tee flows out the low-pressure liquid after the high-pressure recovery liquid with pressure energy is released, and the other one flows out the high-pressure liquid after the pressurized low-pressure liquid needs to be pressurized. By adjusting the switching frequency of the first switcher and the second switcher at the initial position and the position rotated by 180°, the liquid without pressure exchange does not flow out of the second switcher.

The working process of the liquid pressure energy recovery device based on the rotary special-shaped shaft end face seal switch of this embodiment is described below by taking the application in the reverse osmosis seawater desalination system as an example. Fig. 10 is a working principle diagram when the special-shaped shafts in the first switcher and the second switcher are in the initial position at the same time in the device of the utility model, using high-pressure concentrated brine 27 as the high-pressure recovery liquid with pressure energy, and using low-pressure seawater 28 as the The low-pressure liquid that needs to be pressurized, the high-pressure seawater 29 formed by the pressurized low-pressure seawater 28 is used as the high-pressure liquid that needs to be pressurized, and the low-pressure concentrated brine 30 is used as the high-pressure recovery liquid with pressure energy to release the pressure After the low pressure fluid.

At this time, the high-pressure concentrated brine 27 can only enter the first switch through the first sealing hole 1 through the tee, enter the first connecting pipeline 25 through the first connecting hole 16, and enter through the first connecting hole 16' of the second switch. The second switcher flows out of the second switcher from the first sealing hole 1' of the second switcher; at the same time, the low-pressure seawater 28 can only enter the first switcher from the fourth sealing hole 4 through the tee, and pass through the second connecting hole 17 enters the second connecting pipeline 26, enters the second switcher through the second connection hole 17' of the second switcher, and flows out of the second switcher from the fourth sealing hole 4' of the second switcher.

In the above working state, synchronously drive the two special-shaped shafts of the first switcher and the second switcher to rotate 180°, and at this time, the two special-shaped shafts of the first switcher and the second switcher are in the position of rotating 180° at the same time, The working principle is shown in Figure 11. At this time, the high-pressure concentrated brine 27 can only enter the first switch from the second sealing hole 2 through the tee, and enter the second connecting pipeline 26 through the second connecting hole 17. After the last working process, the second connecting pipeline 26 is filled with low-pressure seawater 28. Utilizing the incompressibility of the liquid, the high-pressure concentrated brine 27 entering the second connection pipeline 26 compresses the low-pressure seawater 28 left in the previous working process to pressurize it, thereby realizing the pressure from high-pressure concentrated The transfer of brine 27 to low-pressure seawater 28, the pressurized low-pressure seawater 28 becomes high-pressure seawater 29, enters the second switch through the second connecting hole 17' of the second switch, and passes through the second sealing hole 2 of the second switch 'flow out of the second switch; at the same time, the low-pressure seawater 28 can only enter the first switch from the third sealing hole 3 through the tee, and enter the first connecting pipeline 25 through the first connecting hole 16. A connecting pipeline 25 is filled with low-pressure concentrated brine 30. The low-pressure concentrated brine 30 is converted from the pressure energy transferred from the high-pressure brine 27 to the low-pressure seawater 28 in the previous working process, and enters the first connection by utilizing the incompressibility of the liquid. The low-pressure seawater 28 in the pipeline 25 compresses the low-pressure concentrated brine 30 left over from the previous working process so that it continuously leaves the second switcher, thereby realizing the process of displacing the low-pressure concentrated brine 30 by the low-pressure seawater 28. The displaced low-pressure concentrated brine 30 enters the second switcher through the first connecting hole 16' of the second switcher, and flows out of the second switcher from the third sealing hole 3' of the second switcher.

After the above working process is completed, the two special-shaped shafts of the first switcher and the second switcher are synchronously driven to rotate 180° again, and the working state in Fig. 10 is repeated to complete the next working process. The first switcher and the second switcher work together to alternately complete the above two working processes, thereby completing the recovery of the pressure energy of the high-pressure concentrated brine. When the liquid in each of the above processes has just filled the corresponding first connecting pipeline or the second connecting pipeline, the initial position and the position rotated by 180° of the first switcher and the second switcher are switched synchronously in time.

In summary, the liquid pressure energy recovery device based on the rotary special-shaped shaft end face seal switch of this embodiment includes a first switch and a second switch connected through a pipeline group; the first switch and the second switch Both include a casing and a special-shaped shaft, and the special-shaped shaft is rotatably assembled in the casing, so that two mutually isolated cavities are formed in the casing; the two cavities of the first switcher respectively pass through the first connecting pipeline of the pipeline group 25 and the second connecting pipeline 26 communicate with the two cavities of the second switch. The liquid pressure energy recovery device completes the switching of the liquid through the rotation of the special-shaped shaft, thereby realizing the recovery and reuse of the pressure energy of the high-pressure liquid. It has the advantages of simple structure, easy processing, debugging and later maintenance. Each sealing hole is sealed by the end face, which has the advantages of Good sealing effect and pressure energy recovery efficiency, and the switching mode of the special-shaped shaft is flexible, especially when it is rotating, it can cooperate with each sealing hole, making the whole switching process stable, low noise, safe and reliable, and can adapt to various control schemes.

The embodiments of the invention have been presented for purposes of illustration and description, but are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and changes will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to better illustrate the principle and practical application of the invention, and to enable those of ordinary skill in the art to understand the invention and design various embodiments with various modifications suitable for particular purposes.

Claims (5)

1. A liquid pressure energy recovery device based on a rotary special-shaped shaft end face seal switch, characterized in that it includes a first switch and a second switch connected through a pipeline group; Both the first switcher and the second switcher include a casing and a special-shaped shaft, the casing is a hollow cylindrical cavity, and the special-shaped shaft is rotatably assembled in the casing, so that the hollow cylindrical cavity in the casing forms a Two mutually isolated cavities, the side wall of one of the cavities of the casing is provided with a first sealing hole (1), a third sealing hole (3) and a first connection hole (16), and the other is described The side wall of the cavity is provided with a second sealing hole (2), a fourth sealing hole (4) and a second connection hole (17), and the first sealing hole (1) and the third sealing hole (3) are the same as Shaft, the second sealing hole (2) and the fourth sealing hole (4) are coaxial, the axis of the first sealing hole (1) and the axis of the second sealing hole (2) are parallel to each other, and are on the same plane as the axis of the housing ; The first connection hole (16) and the second connection hole (17) are used to connect the first switch and the second switch correspondingly, the first connection hole (16) and the second connection hole (17) ) axes are parallel to each other, and differ from the axis of the first sealing hole by 90°, the first connecting hole (16) and the second connecting hole (17) are on the axis of the first sealing hole (1) and the second sealing hole (2) On the same side of the plane formed by the axis; the centers of the two end faces of the housing are respectively provided with a first shaft hole (18) and a second shaft hole (19); The first sealing hole (1), the second sealing hole (2), the third sealing hole (3) and the fourth sealing hole (4) all include a hole sleeve (5), a sealing cylinder (6) and a spring (7 ), the sealing cylinder (6) is sleeved in the hole sleeve (5) through a spring (7), and can reciprocate in the hole sleeve (5) by compressing the spring (7); The hole sleeve (5) is a cylindrical cavity, one end face is fully open, the center of the other end face has a liquid pipe hole (8), and the end face is also provided with a hole ring groove (9) inside the cavity. ), the hole sleeve annular groove (9) is coaxially arranged with the hole sleeve (5), and the hole sleeve spring seat (10) is arranged on the center line of the circumference direction of the hole sleeve annular groove (9), so An annular sealing surface (11) is formed between the liquid pipe hole (8) and the annular groove (9) of the bore sleeve (9), and a radial through hole (12) is also provided on the side of the bore sleeve (5); One end surface of the sealing cylinder (6) is provided with a sealing cylinder annular groove (13) corresponding to the sleeve annular groove (9), and the sealing cylinder annular groove (13) is in contact with the sealing cylinder ( 6) Coaxial arrangement, the sealing cylinder spring seat (14) corresponding to the sleeve spring seat (10) is arranged on the circumferential center line of the sealing cylinder annular groove (13), and the sealing cylinder ring A circular sealing surface (15) is provided in the groove (13), and when the sealing cylinder (6) reciprocates in the hole sleeve (5), the annular sealing surface can be made to compress the spring (7). (11) contact with the circular sealing surface (15) to realize end face sealing; An isolation cylinder (20) for isolating the inside of the shell into two cavities is arranged in the middle of the special-shaped shaft, and the first switching axis (21) and the second switching axis (21) are respectively arranged on both sides of the isolation cylinder (20). Two switching shafts (22), the first switching shaft (21) and the second switching shaft (22) are formed by radially connecting a semi-cylindrical and a semi-elliptic cylinder, and the diameter of the semi-cylindrical is equal to the minor axis of the semi-elliptic cylinder length, the center of the semi-cylindrical axial section coincides with the center of the semi-elliptic cylindrical axial section, and is located on the axes of the first switching shaft (21) and the second switching shaft (22), the first The phase difference between the switching axis (21) and the second switching axis (22) is 180°, and the first switching axis (21) and the second switching axis (22) are coaxially arranged with the isolation cylinder (20); the A first fixed shaft (23) and a second fixed shaft (24) are respectively arranged at the center of the end faces of the first switching shaft (21) and the second switching shaft (22), and the first fixed shaft (23) and the second The fixed shaft (24) can be respectively assembled in the first shaft hole (18) and the second shaft hole (19); The pipeline group includes a first connection pipeline (25) and a second connection pipeline (26), and the first connection hole (16) of the first switch passes through the first connection pipeline (25) and the second connection pipeline (26). The first connecting hole (16') of the switcher communicates with the second connecting hole (17) of the first switcher through the second connecting pipeline (26) and the second connecting hole (17') of the second switcher connected. 2. The liquid pressure energy recovery device based on the rotating special-shaped shaft end face seal switch according to claim 1, characterized in that: the inner diameter of the casing is equal to the diameter of the isolation cylinder (20). 3. The liquid pressure energy recovery device based on the rotary special-shaped shaft end face seal switch according to claim 1, characterized in that: the diameter of the sealing cylinder (6) is equal to the inner diameter of the hole sleeve (5), and the The axial length of the sealing cylinder (6) is greater than the axial length of the inner cavity of the hole sleeve (5). 4. The liquid pressure energy recovery device based on the rotary special-shaped shaft end face seal switch according to claim 1, characterized in that: the annular sealing surface (11) and the circular sealing surface (15) are set as a plane or Also set to Cone Plane. 5. The liquid pressure energy recovery device based on the rotary special-shaped shaft end face seal switch according to claim 1, characterized in that: the first switching shaft (21) and the second switching shaft (22) are equal in size.