Automatic replacement device for circulating pool cooling water

Abstract

The application discloses a circulating pool cooling water automatic replacement device, wherein a reciprocating assembly is arranged, the reciprocating assembly comprises a hydraulic shell and a hydraulic base, a lifting assembly is arranged on one side of the reciprocating assembly and comprises a first through shell, a second through shell, a first sliding shell and a second sliding shell, and a switch assembly is arranged on one side of the lifting assembly and comprises a drain pipe and a drain valve. The temperature measurement and the high-temperature water automatic replacement of the circulating pool cooling water can be completed without complex sensors and systems under the cooperation of the reciprocating assembly, the lifting assembly and the switch assembly, and the replacement is only performed when the water level and the temperature are higher than the warning line, so that the complexity of the replacement device is reduced and the cost is lowered.

Description

Technical Field

[0001] This invention relates to the field of cooling water replacement technology, and in particular to an automatic cooling water replacement device for a circulating water tank. Background Technology

[0002] In summer, the ambient temperature in the hydropower plant is high, and the units operate at full load. The temperature of the cooling water in the circulating water pool rises significantly, easily reaching the set alarm value of 25°C. This leads to a decrease in the cooling effect of the units, thereby affecting the health and service life of the units. In order to ensure that the cooling water temperature in the circulating water pool is low enough, it is necessary to automatically open the gate to release water when the temperature reaches the warning line and close the gate when the water level is low enough to allow new cooling water to enter. Typical cooling water replacement devices use complex sensors and dedicated systems, which are very expensive. Summary of the Invention

[0003] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0004] In view of the problems existing in the above and / or existing cooling water replacement devices, the present invention is proposed.

[0005] Therefore, the problem to be solved by the present invention is how to measure the temperature of cooling water in a circulating water tank and automatically change the water when necessary, using as few electronic devices as possible.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: an automatic cooling water replacement device for a circulating water tank, comprising a reciprocating component, a lifting component, and a switching component.

[0007] As a preferred embodiment of the automatic cooling water replacement device for the circulating water tank according to the present invention, the reciprocating component includes a hydraulic housing and a hydraulic base, wherein the hydraulic base is disposed at the bottom of the hydraulic housing;

[0008] A lifting assembly, disposed on one side of the reciprocating assembly, includes a first through-shell, a second through-shell, a first sliding shell, and a second sliding shell. The first through-shell is disposed on one side of the hydraulic shell. The first through-shell, the second through-shell, the first sliding shell, and the second sliding shell are interconnected on both sides. The first through-shell and the second through-shell are disposed opposite to each other, and the first sliding shell and the second sliding shell are disposed opposite to each other.

[0009] A switch assembly, located on one side of the lifting assembly, includes a drain pipe and a drain valve. The drain pipe is located on one side of the second through-shell, and the drain valve is located inside the drain pipe.

[0010] As a preferred embodiment of the automatic cooling water replacement device for the circulating water tank of the present invention, the hydraulic housing is provided with a water permeable hole at one end and a piston hole at the other end. The reciprocating assembly further includes a hydraulic spring, a pressure-bearing piston, and a piston shaft. The hydraulic spring is disposed inside the hydraulic housing. One end of the hydraulic spring is connected to the inner wall of the water permeable hole side of the hydraulic housing, and the other end is connected to the pressure-bearing piston. One end of the piston shaft is fixedly connected to the pressure-bearing piston, and the other end passes through the piston hole of the hydraulic housing. The pressure-bearing piston, the piston shaft, and the hydraulic housing form a sealed and airtight space.

[0011] As a preferred embodiment of the automatic cooling water replacement device for the circulating water tank of the present invention, the reciprocating assembly further includes a first rod, a first tube, and a first spring. One end of the first rod is fixed to one end of the piston shaft, and the other end of the first rod is connected to the middle of the outer side of the first tube. The first spring is disposed in the middle of the inner side of the first tube, and a button hole is provided on the side of the first tube.

[0012] As a preferred embodiment of the automatic cooling water replacement device for the circulating water tank of the present invention, the reciprocating assembly further includes a second rod and a first button. The second rod is disposed at one end of the first pipe. There are two second rods. The two ends of the first spring are connected to the two second rods. The first button passes through the middle of the side of the second rod and passes through the button hole on the side of the first pipe.

[0013] As a preferred embodiment of the automatic cooling water replacement device for the circulating water tank of the present invention, wherein: the center of the first through shell is provided with a first slender hole, the center of the second through shell is provided with a second coarse hole, and the first sliding shell and the second sliding shell are symmetrically provided with unidirectional grooves facing each other.

[0014] As a preferred embodiment of the automatic cooling water replacement device for the circulating water tank of the present invention, the unidirectional trough is an inclined parallelogram trough, the lifting assembly further includes two wedges, which are respectively set at the highest point of the unidirectional trough and the lowest point corner, and one end of the second rod cooperates with the unidirectional trough.

[0015] As a preferred embodiment of the automatic cooling water replacement device for the circulating water tank of the present invention, the lifting assembly further includes a first long column and a second long column. The first long column is located at the top of the highest point of the one-way channel, and the second long column is located at the bottom of the lowest point of the one-way channel. The lifting assembly also includes a second button, of which there are two, located at the bottom of the first long column and the top of the second long column, respectively.

[0016] As a preferred embodiment of the automatic cooling water replacement device for the circulating water pool of the present invention, the lifting assembly further includes a lifting groove and a blocking block. There are two lifting grooves, which are respectively disposed on the side of the first sliding shell and the second sliding shell, and the blocking block array is arranged in the lifting groove.

[0017] As a preferred embodiment of the automatic cooling water replacement device for the circulating water tank of the present invention, the switching assembly further includes a motor and a motor base. The motor is disposed on one side of the drain valve, and the motor base is disposed at the bottom of the motor. The drain valve is circular and cooperates with the inside of the drain pipe. The drain pipe has reversing holes on both sides. The drain valve has protrusions at both ends that cooperate with the reversing holes. One end of the motor is connected to the protrusion on the side of the drain valve.

[0018] As a preferred embodiment of the automatic cooling water replacement device for the circulating water tank of the present invention, the switch assembly further includes a locking post and a thermal control spring. One end of the drain pipe is provided with a temperature control groove. One end of the thermal control spring is located at the bottom of the temperature control groove, and the other end is connected to one end of the locking post. The other end of the locking post passes through the temperature control groove and cooperates with the lifting groove.

[0019] The beneficial effects of this invention are as follows: With the cooperation of the reciprocating component, the lifting component and the switching component, this invention can complete the temperature measurement of the cooling water in the circulating water tank and the automatic replacement of high-temperature water without the need for complex sensors and systems. Moreover, the replacement will only be carried out when the water level and temperature are both higher than the warning line, which reduces the complexity of the replacement device and lowers the cost. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0021] Figure 1 This is an overall structural diagram of the automatic cooling water replacement device for the circulating water tank.

[0022] Figure 2 This is a structural diagram of the switch assembly for an automatic cooling water replacement device in a circulating water tank.

[0023] Figure 3 This is a structural diagram of the reciprocating components of an automatic cooling water replacement device for a circulating water tank.

[0024] Figure 4 This is a structural diagram of the lifting assembly of an automatic cooling water replacement device for a circulating water tank.

[0025] Figure 5 Another structural view of the lifting assembly of the automatic cooling water replacement device for the circulating water tank. Detailed Implementation

[0026] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0027] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0028] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0029] Example 1

[0030] Reference Figures 1-3 This is the first embodiment of the present invention. This embodiment provides an automatic cooling water replacement device for a circulating water tank. The automatic cooling water replacement device for a circulating water tank includes a reciprocating component 100, a lifting component 200, and a switching component 300.

[0031] Specifically, the reciprocating assembly 100 includes a hydraulic housing 101 and a hydraulic base 102, with the hydraulic base 102 located at the bottom of the hydraulic housing 101.

[0032] The hydraulic base 102 is fixed to the bottom of the circulating water tank, and the reciprocating component 100 is used to change its extension length when the water level rises or falls, thereby adjusting the height of the lifting component 200.

[0033] Specifically, the lifting assembly 200 is located on one side of the reciprocating assembly 100 and includes a first through shell 201, a second through shell 202, a first sliding shell 203, and a second sliding shell 204. The first through shell 201 is located on one side of the hydraulic shell 101. The first through shell 201, the second through shell 202, the first sliding shell 203, and the second sliding shell 204 are connected to each other on both sides. The first through shell 201 and the second through shell 202 are arranged opposite each other, and the first sliding shell 203 and the second sliding shell 204 are arranged opposite each other.

[0034] The No. 1 through shell 201, the No. 2 through shell 202, the No. 1 sliding shell 203 and the No. 2 sliding shell 204 are connected end to end to form a long box shape without top or bottom. The lifting component 200 can move up and down under the action of the reciprocating component 100.

[0035] Specifically, the switch assembly 300 is located on one side of the lifting assembly 200 and includes a drain pipe 301 and a drain valve 302. The drain pipe 301 is located on one side of the second through shell 202, and the drain valve 302 is located inside the drain pipe 301.

[0036] The drain valve 302 controls the opening and closing of the drain pipe 301, and the switch assembly 300 switches the state of the drain pipe 301 open or closed under the action of the lifting assembly 200.

[0037] Specifically, the hydraulic housing 101 has a water-permeable hole H1 at one end and a piston hole H2 at the other end. The reciprocating assembly 100 also includes a hydraulic spring 103, a pressure-bearing piston 104, and a piston shaft 105. The hydraulic spring 103 is located inside the hydraulic housing 101. One end of the hydraulic spring 103 is connected to the inner wall of the water-permeable hole H1 of the hydraulic housing 101, and the other end is connected to the pressure-bearing piston 104. One end of the piston shaft 105 is fixedly connected to the pressure-bearing piston 104, and the other end passes through the piston hole H2 of the hydraulic housing 101. The pressure-bearing piston 104, the piston shaft 105, and the hydraulic housing 101 form a sealed and airtight space.

[0038] The hydraulic housing 101 is a hollow cylinder with one large and one small opening at each end. The hydraulic housing 101, hydraulic spring 103, pressurized piston 104 and piston shaft 105 are connected to form a whole. The default setting for the water level is the lowest water level. At this time, the end of the pressurized piston 104 that is not in contact with the water shaft 105 receives the lowest water pressure, which is balanced with the minimum extension of the hydraulic spring 103.

[0039] When the water level rises, the pressure on the pressurized piston 104 increases, causing it to move to the right until the hydraulic spring 103 extends again, and the tension and pressure are balanced again.

[0040] Specifically, the reciprocating assembly 100 also includes a first rod 106, a first tube 107, and a first spring 108. One end of the first rod 106 is fixed to one end of the piston shaft 105, and the other end of the first rod 106 is connected to the middle of the outer side of the first tube 107. The first spring 108 is located in the middle of the inner side of the first tube 107, and a button hole H3 is provided on the side of the first tube 107.

[0041] The first rod 106 moves along with the pressurized piston 104, and drives the subsequent first tube 107 and first spring 108 to move.

[0042] Specifically, the reciprocating assembly 100 also includes a second rod 109 and a first button 110. The second rod 109 is located at one end of the first tube 107. There are two second rods 109. The two ends of the first spring 108 are connected to the two second rods 109. The first button 110 passes through the middle of the side of the second rod 109 and passes through the button hole H3 on the side of the first tube 107.

[0043] When tube 107 is driven, it will drive rod 109 to move. When rod 109 is subjected to force on its side, it will move inward, compress spring 108, and cause button 110 to move within button hole H3. The movement of rod 109 and button 110 will change the position of lifting assembly 200.

[0044] In use, the reciprocating assembly 100 changes its extension length as the water level rises or falls, thereby adjusting the height of the lifting assembly 200. The lifting assembly 200 is used to switch the switch assembly 300 between on and off states. The default water level setting is the lowest level, where the end of the pressure-bearing piston 104 without the piston shaft 105, i.e., the end in contact with water, experiences the lowest water pressure, balancing the tension of the hydraulic spring 103 at its lowest extension. When the water level rises, the pressure on the pressure-bearing piston 104 increases, causing it to move to the right until the hydraulic spring 103 extends again, restoring the balance between tension and pressure. This movement of the pressure-bearing piston 104 indirectly drives the movement of lever 109 and button 110, thus changing the position of the lifting assembly 200.

[0045] Example 2

[0046] Reference Figures 1-5 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0047] Specifically, the first through shell 201 has a first slender hole H4 at its center, the second through shell 202 has a second coarse hole H5 at its center, and the first sliding shell 203 and the second sliding shell 204 are symmetrically provided with unidirectional grooves H6.

[0048] The first rod 106 and the first slender hole H4 cooperate to restrict the lifting component 200, ensuring that the lifting component 200 can only move up and down, thus preventing the internal parts from misaligning and causing failure. The second thick hole H5 cooperates with the drain pipe 301 to ensure that the drain pipe 301 is not blocked by the lifting component 200 when the lifting component 200 moves up and down. The one-way groove H6 cooperates with the second rod 109. When the first rod 106 changes its extension length, the second rod 109 changes the position of the lifting component 200 through the one-way groove H6.

[0049] Specifically, the one-way groove H6 is an inclined parallelogram groove, and the lifting assembly 200 also includes two wedges 205, which are respectively set at the highest point of the pipe and the lowest point corner of the one-way groove H6. One end of the second rod 109 cooperates with the one-way groove H6.

[0050] When rod 109 moves within the one-way groove H6, it can only rotate counterclockwise due to the obstruction of wedge 205. Furthermore, rod 109 will be squeezed when it encounters wedge 205, which causes button 110 to move within button hole H3.

[0051] Specifically, the lifting assembly 200 also includes a first long column 206 and a second long column 207. The first long column 206 is located at the top of the highest point of the one-way groove H6, and the second long column 207 is located at the bottom of the lowest point of the one-way groove H6. The lifting assembly 200 also includes a second button 208. There are two second buttons 208, which are located at the bottom of the first long column 206 and the top of the second long column 207, respectively.

[0052] When button 110 encounters wedge 205 on lever 109, it will move within button hole H3, thereby bringing button 110 and button 208 into contact and forming a path. The position setting of button 208 matches that of button 110.

[0053] Specifically, the lifting assembly 200 also includes a lifting groove H7 and a blocking block 209. There are two lifting grooves H7, which are respectively set on the side of the first sliding shell 203 and the second sliding shell 204. The blocking block 209 is arrayed inside the lifting groove H7.

[0054] The lifting groove H7 is located on the side where the two sliding shells and the drain pipe 301 contact each other, and it cooperates with the switch assembly 300. The height of the blocking block 209 is lower than the depth of the lifting groove H7, so there are two ways to cooperate with the switch assembly 300. When the switch assembly 300 is inserted too deeply, it will fall between the blocking blocks 209 in the array, so the lifting assembly 200 cannot move up and down. When the switch assembly 300 is inserted too shallowly, it will not contact the blocking block 209, so the lifting assembly 200 can move up and down.

[0055] In use, the reciprocating assembly 100 changes its extension length as the water level rises or falls, thereby adjusting the height of the lifting assembly 200. The lifting assembly 200 is used to switch the switch assembly 300 between open and closed states. The default water level setting is the lowest water level, where the end of the pressure-bearing piston 104 without the piston shaft 105, i.e., the end in contact with water, experiences the lowest water pressure, balancing the tension of the hydraulic spring 103 at its lowest extension. When the water level rises, the pressure on the pressure-bearing piston 104 increases, causing it to move to the right until the hydraulic spring 103 extends again, balancing the tension and pressure once more. The movement of the pressure-bearing piston 104 indirectly drives the movement of the second lever 109 and the first button 110. The second lever 109 changes the position of the lifting assembly 200 via the one-way groove H6, and the second lever 109, via the wedge 205, changes the position of the first button 110 within the button hole H3. Then, the first button 110 and the second button 208 come into contact, forming a passage.

[0056] The lifting groove H7 is located on the side where the two sliding shells and the drain pipe 301 contact each other, and it cooperates with the switch assembly 300. The height of the blocking block 209 is lower than the depth of the lifting groove H7, so there are two ways to cooperate with the switch assembly 300. When the switch assembly 300 is inserted too deeply, it will fall between the blocking blocks 209 in the array, so the lifting assembly 200 cannot move up and down. When the switch assembly 300 is inserted too shallowly, it will not contact the blocking block 209, so the lifting assembly 200 can move up and down.

[0057] Example 3

[0058] Reference Figures 1-5 This is the third embodiment of the present invention, which is based on the first two embodiments.

[0059] Specifically, the switch assembly 300 also includes a motor 303 and a motor base 304. The motor 303 is located on one side of the drain valve 302, and the motor base 304 is located at the bottom of the motor 303. The drain valve 302 is circular and fits inside the drain pipe 301. The drain pipe 301 has reversing holes H8 on both sides. The drain valve 302 has protrusions at both ends that fit with the reversing holes H8. One end of the motor 303 is connected to the protrusion on the side of the drain valve 302.

[0060] Motor 303 is a servo motor. Each time button 110 and button 208 come into contact and form a circuit, the connected drain valve 302 will rotate 90 degrees around the reversing hole H8.

[0061] Specifically, the switch assembly 300 also includes a locking post 305 and a thermal control spring 306. One end of the drain pipe 301 is provided with a temperature control groove H9. One end of the thermal control spring 306 is located at the bottom of the temperature control groove H9, and the other end is connected to one end of the locking post 305. The other end of the locking post 305 passes through the temperature control groove H9 and cooperates with the lifting groove H7.

[0062] The thermal control spring 306 is used to adjust the depth of the locking post 305 in the lifting groove H7. The default temperature setting is higher than the warning temperature. The thermal control spring 306 is biased to the right, and the locking post 305 is in the lifting groove H7 without contacting the blocking block 209. The lifting assembly 200 can move up and down, so that button 110 and button 208 can contact to form a passage and change the state of the drain valve 302. When the water temperature is lower than the default setting, the thermal control spring 306 is biased to the right less, and the locking post 305 is stuck between the array of blocking blocks 209, preventing the lifting assembly 200 from moving up and down. Therefore, when the water temperature is low, the water level will not affect the opening and closing of the drain valve 302.

[0063] When in use, the water level is at its lowest by default. Regardless of the temperature, the water tank will be filled with enough water first. After running for a period of time, if the temperature is higher than the warning line, the device will automatically open the drain valve 302 to drain the water from the drain pipe 301. After draining the hot water, the drain valve 302 will be closed, and then the water tank will be filled with water again.

[0064] The working principle is as follows: When water is first released to raise the water level, the water temperature will gradually drop below the temperature warning line, regardless of whether it is high or low. The thermal control spring 306 deflects to the right less, and the locking post 305 is stuck between the array of blocking blocks 209, preventing the lifting assembly 200 from moving up and down. Therefore, when the water temperature is low, the water level will not affect the opening and closing of the drain valve 302. At this time, the end of the pressurized piston 104 without the piston shaft 105, that is, the end in contact with the water, is subjected to water pressure and rises with the rise of the water level. However, since the lifting assembly 200 cannot move up and down, and since the lifting groove H7 blocks the second rod 109, the piston shaft 105 and the first rod 106, etc., cannot move.

[0065] After running for a period of time, the temperature exceeds the warning line, and the thermal control spring 306 deviates more to the right. The locking post 305 slowly moves in the lifting groove H7 and eventually no longer contacts the blocking block 209. The lifting assembly 200 can move up and down. At this time, the pressurized piston 104 transmits power to the second rod 109 and then to the lifting groove H7. The second rod 109 moves along the lower left side of the lifting groove H7, pushing the lifting assembly 200 upward. The second rod 109 makes the first button 110 and the second button 208 contact at the lower right corner wedge 205 to form a passage. The motor 303 makes the drain valve 302 rotate 90 degrees, and the drain pipe 301 is open.

[0066] During the water level reduction process, the pressure piston 104 is lowered by the water pressure as the water level decreases. The second rod 109 moves along the upper right side of the lifting groove H7. Under the action of the lifting assembly 200's own weight and the pulling force of the hydraulic spring 103, the lifting assembly 200 moves downward. When the water level is at its lowest, the second rod 109 makes the first button 110 and the second button 208 contact again at the upper left corner wedge 205 to form a passage. The motor 303 makes the drain valve 302 rotate 90 degrees again, and the drain pipe 301 closes.

[0067] It should also be noted that the lifting trough H7 is roughly divided into four sections, none of which are horizontal or vertical. The top and bottom are slightly horizontal, with a very small angle along the horizontal direction. When the second rod 109 moves to the bottom or top of the lifting trough H7, the force exerted on the lifting trough H7 is very small compared to the relatively vertical side trough. In other words, when the second rod 109 passes through the wedge 205, it changes from a slightly horizontal trough to a slightly vertical trough each time. After each passage through the wedge 205, the force exerted by the second rod 109 on the horizontal direction of the lifting trough H7 is greatly reduced. The hydraulic spring 103 is used to adjust the pressure difference between the lowest and highest water levels. This ensures that at the highest water level, the difference between the water pressure and the spring tension maximizes the force of the second rod 109 to the right, and at the lowest water level, the difference between the spring pressure and the water pressure maximizes the force of the second rod 109 to the left.

[0068] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. An automatic cooling water replacement device for a circulating water tank, characterized in that: include, The reciprocating assembly (100) includes a hydraulic housing (101), a hydraulic base (102), and a button (110), wherein the hydraulic base (102) is disposed at the bottom of the hydraulic housing (101); A lifting assembly (200), disposed on one side of the reciprocating assembly (100), includes a first through-shell (201), a second through-shell (202), a first sliding shell (203), a second sliding shell (204), and a second button (208). The first through-shell (201) is disposed on one side of the hydraulic shell (101). The first through-shell (201), the second through-shell (202), the first sliding shell (203), and the second sliding shell (204) are interconnected on both sides. The first through-shell (201) and the second through-shell (202) are arranged opposite to each other, and the first sliding shell (203) and the second sliding shell (204) are arranged opposite to each other. A switch assembly (300) is disposed on one side of the lifting assembly (200) and includes a drain pipe (301) and a drain valve (302). The drain pipe (301) is disposed on one side of the second through shell (202), and the drain valve (302) is disposed inside the drain pipe (301). The lifting assembly (200) further includes a lifting groove (H7) and a blocking block (209). There are two lifting grooves (H7), which are respectively disposed on the sides of the first sliding shell (203) and the second sliding shell (204). The blocking blocks (209) are arrayed in the lifting groove (H7). The switch assembly (300) further includes a locking post (305) and a thermal control spring (306). One end of the drain pipe (301) is provided with a temperature control groove (H9). One end of the thermal control spring (306) is located at the bottom of the temperature control groove (H9), and the other end is connected to one end of the locking post (305). The other end of the locking post (305) passes through the temperature control groove (H9) and cooperates with the lifting groove (H7). When the first button (110) and the second button (208) come into contact to form a passage, the state of the drain valve (302) is changed.

2. The automatic cooling water replacement device for a circulating water tank as described in claim 1, characterized in that: The hydraulic housing (101) has a water-permeable hole (H1) at one end and a piston hole (H2) at the other end. The reciprocating assembly (100) also includes a hydraulic spring (103), a pressure piston (104), and a piston shaft (105). The hydraulic spring (103) is disposed inside the hydraulic housing (101). One end of the hydraulic spring (103) is connected to the inner wall of the water-permeable hole (H1) of the hydraulic housing (101), and the other end is connected to the pressure piston (104). One end of the piston shaft (105) is fixedly connected to the pressure piston (104), and the other end passes through the piston hole (H2) of the hydraulic housing (101). The pressure piston (104), the piston shaft (105), and the hydraulic housing (101) form a sealed and airtight space.

3. The automatic cooling water replacement device for circulating water tank as described in claim 2, characterized in that: The reciprocating assembly (100) also includes a first rod (106), a first tube (107), and a first spring (108). One end of the first rod (106) is fixed to one end of the piston shaft (105), and the other end of the first rod (106) is connected to the middle of the outer side of the first tube (107). The first spring (108) is located in the middle of the inner side of the first tube (107), and a button hole (H3) is provided on the side of the first tube (107).

4. The automatic cooling water replacement device for circulating water tank as described in claim 3, characterized in that: The reciprocating assembly (100) also includes a second rod (109), which is located at one end of the first tube (107). There are two second rods (109). The two ends of the first spring (108) are connected to the two second rods (109). The first button (110) passes through the middle of the side of the second rod (109) and passes through the button hole (H3) on the side of the first tube (107).

5. The automatic cooling water replacement device for a circulating water tank as described in claim 4, characterized in that: The first through shell (201) has a first slender hole (H4) at its center, the second through shell (202) has a second coarse hole (H5) at its center, and the first sliding shell (203) and the second sliding shell (204) are symmetrically provided with unidirectional grooves (H6).

6. The automatic cooling water replacement device for a circulating water tank as described in claim 5, characterized in that: The one-way groove (H6) is an oblique parallelogram groove. The lifting assembly (200) also includes a wedge (205). There are two wedges (205), which are respectively set at the highest point of the one-way groove (H6) and the lowest point corner. One end of the second rod (109) is engaged with the one-way groove (H6).

7. The automatic cooling water replacement device for a circulating water tank as described in claim 5 or 6, characterized in that: The lifting assembly (200) also includes a first long column (206) and a second long column (207). The first long column (206) is located at the top of the highest point of the one-way groove (H6), and the second long column (207) is located at the bottom of the lowest point of the one-way groove (H6). There are two second buttons (208), which are located at the bottom of the first long column (206) and the top of the second long column (207), respectively.

8. The automatic cooling water replacement device for a circulating water tank as described in claim 7, characterized in that: The switch assembly (300) also includes a motor (303) and a motor base (304). The motor (303) is located on one side of the drain valve (302), and the motor base (304) is located at the bottom of the motor (303). The drain valve (302) is circular and fits inside the drain pipe (301). The drain pipe (301) has reversing holes (H8) on both sides. The drain valve (302) has protrusions at both ends that fit with the reversing holes (H8). One end of the motor (303) is connected to the protrusion on the side of the drain valve (302).

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