CN211133122U

CN211133122U - Frequency conversion water tank convenient for replacing filter screen of water inlet pipe

Info

Publication number: CN211133122U
Application number: CN201921639306.6U
Authority: CN
Inventors: 朱鹏
Original assignee: Wuhan Asean Marine Technology Co ltd
Current assignee: Wuhan Asean Marine Technology Co ltd
Priority date: 2019-09-27
Filing date: 2019-09-27
Publication date: 2020-07-31
Anticipated expiration: 2029-09-27

Abstract

The utility model discloses a conveniently change frequency conversion water tank of inlet tube filter screen, including water tank body, conveying mechanism, outlet pipe, first inlet tube, second inlet tube, blocked mechanical system, set casing, bayonet lock, expanding spring, indent, second ejector pin, recess and first ejector pin. The utility model has the advantages that: thereby the water source gets into the back as first inlet tube, get into the inside of water cabinet body through set casing and second inlet tube, flow through the outlet pipe at last, get into the inside back through filtering mechanism to the water source at the water source through first inlet tube simultaneously, thereby make the inside impurity volume at the water source of entering reduce, can make first ejector pin and second ejector pin gliding under expanding spring's effect after filtering mechanism takes out, make the inside conflict of recess of bayonet lock and set casing bottom, thereby make the inside that the water of first inlet tube can't get into the second inlet tube, be favorable to reducing the loss waste at the water source when clearance or change filtering mechanism, the efficiency of clearance has also been increaseed.

Description

Frequency conversion water tank convenient for replacing filter screen of water inlet pipe

Technical Field

The utility model relates to a frequency conversion water tank specifically is a conveniently change frequency conversion water tank of inlet tube filter screen, belongs to water tank technical field.

Background

The variable frequency water supply device is a novel marine water supply device which applies an alternating current variable frequency speed regulation technology and a programmable control technology (P L C) to automatic control of a water pump, the device can automatically adjust the rotating speed of a running water pump motor or make a standby water pump put into and quit running according to the change of pressure influenced by the difference of instantaneous water consumption so as to ensure the requirement of variable constant-pressure water supply of a user, the starting of each water pump is variable frequency starting, the equipment is kept in the optimal state of high efficiency and energy conservation, the main part of the device adopts an original-installed imported element, the defects of large volume, heavy weight, frequent starting of the motor, high energy consumption and the like of a common pressure water tank are overcome, and the variable frequency water supply device has the advantages of small volume, light weight, low noise, energy conservation, high efficiency, reliability.

However, the inlet tube of water tank need change the filter screen of inside when having carried out the first filtration to water to reduce the inside impurity content at water source, traditional filter screen needs numerous and diverse dismantlement just can carry out the operation when changing, need change the process after the valve of intaking is closed simultaneously when changing, if the valve apart from the water tank when far away, need make a round trip to run greatly increased the consumption of staff's time, also reduced the efficiency of water tank work.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a conveniently change frequency conversion water tank of inlet tube filter screen for solving above-mentioned problem, the flexible operation, the installation of being convenient for is dismantled, and the convenience is closed to the inlet tube simultaneously, and the convenience is changed the filter screen, has saved the time of closing the floodgate, has also practiced thrift the waste at water source.

The utility model realizes the purpose by the following technical scheme, a frequency conversion water tank convenient for replacing a filter screen of an inlet pipe, which comprises a water tank body and conveying mechanisms arranged at two ends of the water tank body, wherein each conveying mechanism comprises an outlet pipe, a first inlet pipe and a second inlet pipe; the water outlet pipe is mounted on one side of the bottom of the water tank, and one end of the water outlet pipe is fixedly connected with the side wall of the water tank body; a locking mechanism is arranged between the first water inlet pipe and the second water inlet pipe, and the first water inlet pipe is communicated with the second water inlet pipe through the locking mechanism; the locking mechanism comprises a fixed shell, a bayonet lock, a telescopic spring, a pressure groove, a second ejector rod, a groove and a first ejector rod, wherein one end of the fixed shell is fixedly connected with one end of the first water inlet pipe, and the other end of the fixed shell is fixedly connected with the other end of the second water inlet pipe; the inner side of the top of the fixed shell is provided with the pressure groove, the bayonet lock is arranged in the pressure groove, the bayonet lock is in an inverted-Y-shaped structure, and the bayonet lock is connected with the pressure groove in a sliding manner; two ends of the clamping pin penetrate through the bottom of the pressure groove and extend to the outer side wall of the pressure groove, the grooves are formed in two ends of the inner side wall of the bottom of the fixed shell, and the grooves are clamped with two ends of the clamping pin; the telescopic spring is arranged at the center of the pressure groove, and the bottom of the telescopic spring is fixedly connected with the side wall of the pressure groove; the first ejector rod and the second ejector rod are mounted at the center of the bayonet lock, and the top of the first ejector rod is fixedly connected with one side of the bayonet lock; the first ejector rod and the second ejector rod penetrate through the telescopic spring and the side wall of the pressure groove and extend to the outer side of the pressure groove, the first ejector rod and the second ejector rod are connected with the inner part of the side wall of the bottom of the pressure groove in a sliding mode, and the top of the telescopic spring is fixedly connected with one side of the clamping pin; the bottom of ejector pin be equipped with set casing bottom sliding connection's filtering mechanism, just filtering mechanism with the bottom of ejector pin is contradicted.

Preferably, in order to enable the bayonet lock to be clamped with the inner part of the groove more tightly and prevent a water source from flowing, the locking mechanism further comprises a first rubber pad and a second rubber pad, the first rubber pad is mounted at the tops of the two ends of the bayonet lock, and the second rubber pad is mounted on the inner side walls of the two grooves.

Preferably, in order to enable the sliding plate to perform an inward pushing action and an outward pushing action after being inserted, so as to facilitate the sliding plate to be fixed more stably and tightly, the locking mechanism further comprises a damping spring, the damping spring is installed between the first ejector rod and the second ejector rod, the top of the damping spring is fixedly connected with the bottom of the first ejector rod, and the bottom of the damping spring is fixedly connected with the top of the second ejector rod.

Preferably, in order to enable the bayonet lock to effectively seal the two ends inside the fixed shell synchronously, the two ends of the bayonet lock are equal in length, and the lengths of the two ends of the bayonet lock are greater than the inner height of the pressure groove.

Preferably, in order to facilitate preliminary filtration of water flowing into the fixed shell and to clean a water source, a filtering mechanism is mounted on the inner side of the bottom of the fixed shell, the filtering mechanism comprises a water inlet groove, a sliding plate and a filter screen, a collecting groove is formed in the bottom of the fixed shell, a cleaning mechanism is mounted at the bottom of the collecting groove, the sliding plate penetrates through the cleaning mechanism and extends to the inner side of the outer side wall of the pressure groove and the bottom of the second ejector rod, and the sliding plate is connected with the cleaning mechanism in a sliding manner; the filter screen is arranged at the center of the sliding plate.

Preferably, for the convenience of installation and dismantlement change on the slide the filter screen, filtering mechanism still includes bearing and apron, the apron is located clearance mechanism's outside, just the apron through the bearing with the bottom of slide is rotated and is connected.

Preferably, in order to clean sundries accumulated in the collecting tank for a long time, a cleaning mechanism is mounted at the bottom of the fixing shell and comprises a sliding groove, a clamping plate, a clamping groove, a return spring and a sealing plate, the sealing plate is clamped with the bottom of the fixing shell, the cover plate is arranged on the outer side of the sealing plate, and the cover plate is in threaded connection with the outer side wall of the sealing plate; the sliding plate penetrates through the sealing plate and is connected with the sealing plate in a sliding manner, and clamping grooves are formed in two ends of the inner side wall of the sealing plate; the clamping device is characterized in that sliding grooves are formed in two side walls of the fixed shell, the clamping plate is connected with the inside of the sliding grooves in a sliding mode, the bottom end of the clamping plate penetrates through the sliding grooves and is clamped with the inside of the clamping grooves, two reset springs are mounted on one side of the clamping plate, and the other ends of the two reset springs are fixedly connected with the inner side walls of the sliding grooves.

Preferably, in order to facilitate opening and closing and locking of the sealing plate, and therefore to clean the inside of the fixed shell, the cleaning mechanism further comprises a button, the button is mounted at the other end of the clamping plate, one end of the button penetrates through the side wall of the fixed shell and extends to the outer side of the fixed shell, and the button is connected with the outer side wall of the fixed shell in a sliding manner.

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

(1) the utility model can enter the water cabinet body through the fixed shell and the second water inlet pipe after the water source enters the first water inlet pipe, and finally flows out through the water outlet pipe, thereby achieving the required effect, simultaneously, the water source is primarily filtered through the filtering mechanism after the water source enters the fixed shell through the first water inlet pipe, thereby reducing the internal impurity amount of the entered water source, preventing the water source with impurities from polluting the inside of the water cabinet body or blocking parts, causing the damage of the water cabinet body, after filtering the water source for a long time, the filtering mechanism and the bottom of the fixed shell are drawn out and replaced, thereby ensuring the inside of the filtering mechanism to be cleaner, when the filtering mechanism is drawn out, the first ejector rod and the second ejector rod can slide down under the action of the expansion spring, the two ends of the clamping pin are butted with the inside of the groove at the bottom of the fixed shell, the two ends inside of the fixed shell are blocked, thereby ensuring that the water of the first water inlet pipe can not, the water source in the fixed shell can be interrupted, the filtering mechanisms in the fixed shell and the inner part of the fixed shell can be cleaned, the loss and waste of the water source can be reduced when the filtering mechanism is cleaned or replaced, and the cleaning efficiency is improved.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the connection between the locking mechanism and the filter mechanism shown in FIG. 1;

fig. 3 is an enlarged view of the portion a shown in fig. 2.

In the figure: 1. the water tank comprises a water tank body, 2, a conveying mechanism, 21, a water outlet pipe, 22, a first water inlet pipe, 23, a second water inlet pipe, 3, a locking mechanism, 31, a fixed shell, 32, a clamping pin, 33, a first rubber pad, 34, a telescopic spring, 35, a pressure groove, 36, a damping spring, 37, a second ejector rod, 38, a groove, 39, a second rubber pad, 39a, a first ejector rod, 4, a filtering mechanism, 41, a water inlet groove, 42, a sliding plate, 43, a filtering net, 44, a bearing, 45, a cover plate, 5, a cleaning mechanism, 51, a sliding groove, 52, a button, 53, a clamping plate, 54, a clamping groove, 55, a return spring, 56 and a sealing plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, a frequency conversion water tank convenient for replacing a filter screen of a water inlet pipe comprises a water tank body 1 and conveying mechanisms 2 installed at two ends of the water tank body 1, wherein each conveying mechanism 2 comprises a water outlet pipe 21, a first water inlet pipe 22 and a second water inlet pipe 23, the second water inlet pipe 23 is installed at one side of the top of the water tank body 1, one end of the second water inlet pipe 23 is fixedly connected with one side of the top of the water tank, and the first water inlet pipe 22 is installed at the other end of the second water inlet pipe 23; the water outlet pipe 21 is installed on one side of the bottom of the water tank, and one end of the water outlet pipe 21 is fixedly connected with the side wall of the water tank body 1; a locking mechanism 3 is arranged between the first water inlet pipe 22 and the second water inlet pipe 23, and the first water inlet pipe 22 is communicated with the second water inlet pipe 23 through the locking mechanism 3; the locking mechanism 3 comprises a fixed shell 31, a bayonet 32, a telescopic spring 34, a pressure groove 35, a second ejector rod 37, a groove 38 and a first ejector rod 39a, wherein one end of the fixed shell 31 is fixedly connected with one end of the first water inlet pipe 22, and the other end of the fixed shell 31 is fixedly connected with the other end of the second water inlet pipe 23; the pressure groove 35 is formed in the inner side of the top of the fixed shell 31, the bayonet 32 is installed in the pressure groove 35, the bayonet 32 is in an inverted-Y-shaped structure, and the bayonet 32 is connected with the pressure groove 35 in a sliding mode; two ends of the bayonet 32 penetrate through the bottom of the pressure groove 35 and extend to the outer side wall of the pressure groove 35, two ends of the inner side wall of the bottom of the fixed shell 31 are provided with the grooves 38, and the grooves 38 are clamped with two ends of the bayonet 32; the center of the pressure groove 35 is provided with the extension spring 34, and the bottom of the extension spring 34 is fixedly connected with the side wall of the pressure groove 35; the first ejector rod 39a and the second ejector rod 37 are installed at the center of the bayonet 32, and the top of the first ejector rod 39a is fixedly connected with one side of the bayonet 32; the first top rod 39a and the second top rod 37 penetrate through the side walls of the telescopic spring 34 and the pressure groove 35 and extend to the outer side of the pressure groove 35, the first top rod 39a and the second top rod 37 are connected with the inner part of the bottom side wall of the pressure groove 35 in a sliding manner, and the top of the telescopic spring 34 is fixedly connected with one side of the bayonet pin 32; the bottom of ejector pin be equipped with fixed shell 31 bottom sliding connection's filter mechanism 4, just filter mechanism 4 with the bottom of ejector pin is contradicted.

As a technical optimization scheme of the utility model, blocked mechanical system 3 still includes first rubber pad 33 and second rubber pad 39, first rubber pad 33 install in the top at bayonet lock 32 both ends, second rubber pad 39 is installed in the inside lateral wall of two recesses 38.

As a technical optimization scheme of the utility model, blocked mechanical system 3 still includes damping spring 36, damping spring 36 install in first ejector pin 39a with between the second ejector pin 37, damping spring 36's top with the bottom fixed connection of first ejector pin 39a, damping spring 36's bottom with the top fixed connection of second ejector pin 37.

As a technical optimization scheme of the utility model, the length at the both ends of bayonet lock 32 equals, just the length at bayonet lock 32 both ends is greater than indent 35's inside height.

As a technical optimization scheme of the present invention, a filtering mechanism 4 is installed at the inner side of the bottom of the fixed shell 31, the filtering mechanism 4 includes a water inlet tank 41, a sliding plate 42 and a filtering net 43, a collecting tank is installed at the bottom of the fixed shell 31, a cleaning mechanism 5 is installed at the bottom of the collecting tank, the sliding plate 42 penetrates through the cleaning mechanism 5 and extends to the inside of the outer side wall of the pressing tank 35 and the bottom of the second ejector rod 37, and the sliding plate 42 is slidably connected with the cleaning mechanism 5; the filter screen 43 is arranged at the center of the sliding plate 42.

As a technical optimization scheme of the utility model, filtering mechanism 4 still includes bearing 44 and apron 45, apron 45 locates the outside of clearance mechanism 5, just apron 45 is through bearing 44 with slide 42's bottom is rotated and is connected.

As a technical optimization scheme of the present invention, a cleaning mechanism 5 is installed at the bottom of the fixed shell 31, the cleaning mechanism 5 includes a sliding groove 51, a clamping plate 53, a clamping groove 54, a return spring 55 and a sealing plate 56, the sealing plate 56 is fastened to the bottom of the fixed shell 31, the cover plate 45 is disposed on the outer side of the sealing plate 56, and the cover plate 45 is in threaded connection with the outer side wall of the sealing plate 56; the sliding plate 42 penetrates through the sealing plate 56, the sliding plate 42 is connected with the sealing plate 56 in a sliding manner, and clamping grooves 54 are formed in two ends of the inner side wall of the sealing plate 56; sliding grooves 51 are formed in two side walls of the fixed shell 31, the clamping plate 53 is slidably connected with the inside of the sliding groove 51, the bottom end of the clamping plate 53 penetrates through the sliding groove 51 and is clamped with the inside of the clamping groove 54, two return springs 55 are mounted on one side of the clamping plate 53, and the other ends of the two return springs 55 are fixedly connected with the inner side walls of the sliding grooves 51.

As a technical optimization scheme of the utility model, clearance mechanism 5 still includes button 52, install the other end of cardboard 53 button 52, the one end of button 52 run through in the lateral wall of set casing 31 extends to the outside of set casing 31, just button 52 with the lateral wall sliding connection of set casing 31.

When the utility model is used, the first water inlet pipe 22 and the water outlet pipe 21 at the two ends of the water cabinet body 1 are firstly connected with each other, when the water source enters the first water inlet pipe 22 and then enters the inside of the water cabinet body 1 through the fixed shell 31 and the second water inlet pipe 23, and finally flows out through the water outlet pipe 21, thereby achieving the required effect, and simultaneously, the water source is primarily filtered through the filter screen 43 inside the collecting tank after the water source enters the inside of the fixed shell 31 through the first water inlet pipe 22, thereby reducing the internal impurity amount of the entered water source, and preventing the water source with impurities from polluting or blocking the parts inside of the water cabinet body 1, thereby causing the damage of the water cabinet body 1, after filtering the water source for a long time, the cover plate 45 is separated from the sealing plate 56 by rotating the cover plate 45, thereby the filter screen 43 on the sliding plate 42 is pulled out from the bottom of the fixed shell 31 to be replaced and, when the filter screen 43 is pulled out, the first push rod 39a and the second push rod 37 slide downwards under the action of the extension spring 34, so that two ends of the bayonet lock 32 and the bottom inside the groove 38 at the bottom of the fixed shell 31 are enabled to be blocked, water in the first water inlet pipe 22 cannot enter the inside of the second water inlet pipe 23, the water source inside the fixed shell 31 is interrupted, the filtering mechanism 4 inside the fixed shell 31 and the filtering mechanism 4 inside the fixed shell 31 are cleaned, the loss and waste of the water source during cleaning or replacing the filtering mechanism 4 are reduced, the cleaning efficiency is also improved, the filter screen 43 is inserted into the fixed shell 31 after being replaced or cleaned, the filter screen 43 is fixed and fastened by the elastic force of the damping spring 36 between the first push rod 39a and the second push rod 37, then the cover plate 45 is screwed to enable the water tank body 1 to continue to work, and after long-time use, the buttons 52 at two ends at the bottom of the fixed shell 31 can be pressed, make cardboard 53 and draw-in groove 54 separation to conveniently make the bottom of closing plate 56 and set casing 31 drop, thereby conveniently clear up the inside lateral wall of set casing 31, thereby ensured the cleanness at water source, place the inside jam or the damage of water cabinet body 1, prolonged the life of water cabinet body 1.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides a conveniently change frequency conversion water tank of inlet tube filter screen, include water tank body (1) and install in conveying mechanism (2) at water tank body (1) both ends, its characterized in that: the conveying mechanism (2) comprises a water outlet pipe (21), a first water inlet pipe (22) and a second water inlet pipe (23), the second water inlet pipe (23) is installed on one side of the top of the water tank body (1), one end of the second water inlet pipe (23) is fixedly connected with one side of the top of the water tank, and the first water inlet pipe (22) is installed on the other end of the second water inlet pipe (23); the water outlet pipe (21) is mounted on one side of the bottom of the water tank, and one end of the water outlet pipe (21) is fixedly connected with the side wall of the water tank body (1); a locking mechanism (3) is arranged between the first water inlet pipe (22) and the second water inlet pipe (23), and the first water inlet pipe (22) is communicated with the second water inlet pipe (23) through the locking mechanism (3); the locking mechanism (3) comprises a fixed shell (31), a bayonet (32), a telescopic spring (34), a pressure groove (35), a second ejector rod (37), a groove (38) and a first ejector rod (39a), one end of the fixed shell (31) is fixedly connected with one end of the first water inlet pipe (22), and the other end of the fixed shell (31) is fixedly connected with the other end of the second water inlet pipe (23); the pressing groove (35) is formed in the inner side of the top of the fixed shell (31), the bayonet lock (32) is installed in the pressing groove (35), the bayonet lock (32) is of an inverted-Y-shaped structure, and the bayonet lock (32) is connected with the pressing groove (35) in a sliding mode; two ends of the bayonet (32) penetrate through the bottom of the pressure groove (35) and extend to the outer side wall of the pressure groove (35), grooves (38) are formed in two ends of the inner side wall of the bottom of the fixed shell (31), and the grooves (38) are clamped with two ends of the bayonet (32); the center of the pressure groove (35) is provided with the telescopic spring (34), and the bottom of the telescopic spring (34) is fixedly connected with the side wall of the pressure groove (35); the center of the bayonet lock (32) is provided with the first ejector rod (39a) and the second ejector rod (37), and the top of the first ejector rod (39a) is fixedly connected with one side of the bayonet lock (32); the first ejector rod (39a) and the second ejector rod (37) penetrate through the telescopic spring (34) and the side wall of the pressure groove (35) and extend to the outer side of the pressure groove (35), the first ejector rod (39a) and the second ejector rod (37) are connected with the inner portion of the side wall of the bottom of the pressure groove (35) in a sliding mode, and the top of the telescopic spring (34) is fixedly connected with one side of the clamping pin (32); the bottom of ejector pin be equipped with fixed shell (31) bottom sliding connection's filtering mechanism (4), just filtering mechanism (4) with the bottom of ejector pin is contradicted.

2. The convenient frequency conversion water tank of changing inlet tube filter screen of claim 1, its characterized in that: the locking mechanism (3) further comprises a first rubber pad (33) and a second rubber pad (39), the first rubber pad (33) is mounted at the tops of two ends of the clamping pin (32), and the second rubber pad (39) is mounted on the inner side walls of the two grooves (38).

3. The convenient frequency conversion water tank of changing inlet tube filter screen of claim 1, its characterized in that: the locking mechanism (3) further comprises a damping spring (36), the damping spring (36) is installed between the first ejector rod (39a) and the second ejector rod (37), the top of the damping spring (36) is fixedly connected with the bottom of the first ejector rod (39a), and the bottom of the damping spring (36) is fixedly connected with the top of the second ejector rod (37).

4. The convenient frequency conversion water tank of changing inlet tube filter screen of claim 1, its characterized in that: the lengths of the two ends of the clamping pin (32) are equal, and the lengths of the two ends of the clamping pin (32) are greater than the inner height of the pressing groove (35).

5. The convenient frequency conversion water tank of changing inlet tube filter screen of claim 1, its characterized in that: a filtering mechanism (4) is installed on the inner side of the bottom of the fixed shell (31), the filtering mechanism (4) comprises a water inlet groove (41), a sliding plate (42) and a filtering net (43), a collecting groove is formed in the bottom of the fixed shell (31), a cleaning mechanism (5) is installed at the bottom of the collecting groove, the sliding plate (42) penetrates through the cleaning mechanism (5) and extends to the inner portion of the outer side wall of the pressure groove (35) and the bottom of the second ejector rod (37), and the sliding plate (42) is in sliding connection with the cleaning mechanism (5); the filter screen (43) is arranged at the center of the sliding plate (42).

6. The convenient frequency conversion water tank of changing inlet tube filter screen of claim 5, its characterized in that: the filtering mechanism (4) further comprises a bearing (44) and a cover plate (45), the cover plate (45) is arranged on the outer side of the cleaning mechanism (5), and the cover plate (45) is rotatably connected with the bottom of the sliding plate (42) through the bearing (44).

7. The convenient frequency conversion water tank of changing inlet tube filter screen of claim 6, its characterized in that: the cleaning mechanism (5) is mounted at the bottom of the fixed shell (31), the cleaning mechanism (5) comprises a sliding groove (51), a clamping plate (53), a clamping groove (54), a return spring (55) and a sealing plate (56), the sealing plate (56) is clamped with the bottom of the fixed shell (31), the cover plate (45) is arranged on the outer side of the sealing plate (56), and the cover plate (45) is in threaded connection with the outer side wall of the sealing plate (56); the sliding plate (42) penetrates through the sealing plate (56), the sliding plate (42) is connected with the sealing plate (56) in a sliding mode, and clamping grooves (54) are formed in two ends of the inner side wall of the sealing plate (56); the fixing device is characterized in that sliding grooves (51) are formed in two side walls of the fixing shell (31), the clamping plate (53) is connected with the sliding grooves (51) in a sliding mode, the bottom end of the clamping plate (53) penetrates through the sliding grooves (51) to be clamped with the clamping grooves (54) in a clamping mode, two return springs (55) are installed on one side of the clamping plate (53), and the other ends of the two return springs (55) are fixedly connected with the inner side walls of the sliding grooves (51).

8. The convenient frequency conversion water tank of changing inlet tube filter screen of claim 7, its characterized in that: the cleaning mechanism (5) further comprises a button (52), the other end of the clamping plate (53) is provided with the button (52), one end of the button (52) penetrates through the side wall of the fixed shell (31) and extends to the outer side of the fixed shell (31), and the button (52) is connected with the outer side wall of the fixed shell (31) in a sliding mode.