CN220322172U - Cooler descaling device for coal mine - Google Patents

Abstract

The utility model relates to the technical field of scale removal, in particular to a scale removal device of a water cooler for a coal mine. The utility model comprises a cleaning pool for placing a cooling water pipe of a water cooler for a coal mine and a circulating device; the cleaning tank is provided with a water inlet and a water outlet which are communicated with the interior of the cleaning tank; the circulating device comprises a circulating pump, a water delivery pipe and a water return pipe, wherein the circulating pump is positioned outside the cleaning pool, the water delivery pipe is connected between the circulating pump and the water inlet, and the water return pipe is connected between the circulating pump and the water outlet. According to the utility model, the circulating pump, the water delivery pipe and the water return pipe are arranged, so that the cleaning pool, the circulating pump, the water delivery pipe and the water return pipe form a circulating system, the efficient descaling cleaning agent is recycled in the cleaning pool, the utilization rate of the efficient descaling cleaning agent is improved, and the cost is reduced.

Description

Cooler descaling device for coal mine

Technical Field

The utility model relates to the technical field of scale removal, in particular to a scale removal device of a water cooler for a coal mine.

Background

The nitrogen injection fire prevention and extinguishment method is one of the common fire prevention and extinguishment methods of coal mines, the equipment generally adopts a carbon molecular sieve nitrogen making machine, a cooler is needed to cool compressed air in the running process of the nitrogen making machine, water is used for circulating cooling for a long time by the cooler, after the cooler runs for a long time, water temperature rises to cause scale to appear in a cooler pipeline due to the influence of water quality, the main components of the scale comprise calcium carbonate and magnesium hydroxide, a certain amount of magnesium bicarbonate possibly contains, after the magnesium bicarbonate heats for a long time, the magnesium carbonate reacts with the water, part or all of the magnesium bicarbonate is converted into magnesium hydroxide, substances with very small solubility are separated out from the water to form sediment, the cooling effect is reduced when the scale of the cooler pipeline is accumulated to a certain extent, the temperature rise during the running process of the nitrogen making machine is finally caused, the normal nitrogen making effect is influenced, and the maintenance quantity of the equipment is increased.

When the scale accumulation of the cooler pipeline can not achieve the cooling effect, the cooler is usually directly replaced, so that the running cost of equipment is increased. If the efficient scale cleaning agent is directly injected into the cooler for descaling on the underground operation site, the efficient scale cleaning agent is greatly influenced by the operation space, the circulating cleaning cannot be realized, the cleaning efficiency is low, the waste of materials such as the cleaning agent can be caused, the equipment maintenance period is shortened, and the labor cost is increased.

Patent application CN 203048765U proposes a water cooler descaling device in glass production, which sets up a heater at the bottom of a tank cylinder and a temperature control device, so as to heat a descaling agent, and sets up a circulating pump, so that the descaling agent can be recycled, but only the heater is arranged at the bottom of the tank cylinder, the descaling agent is easy to change temperature, the maximum efficacy of the descaling agent cannot be exerted, scale which cannot be eliminated is eliminated, and finally the descaling agent still can be accumulated.

Disclosure of Invention

First, the technical problem to be solved

In view of the above-mentioned shortcomings and disadvantages of the prior art, the utility model provides a scale remover for a water cooler for coal mines, which solves the technical problems that the water cooler for coal mines cannot be cleaned circularly and has low cleaning efficiency.

(II) technical scheme

In order to achieve the above purpose, the main technical scheme adopted by the utility model comprises the following steps:

the utility model provides a descaling device of a water cooler for a coal mine, which comprises a cleaning pool for placing a cooling water pipe of the water cooler for the coal mine and a circulating device; the cleaning tank is provided with a water inlet and a water outlet which are communicated with the interior of the cleaning tank; the circulating device comprises a circulating pump, a water delivery pipe and a water return pipe, wherein the circulating pump is positioned outside the cleaning pool, the water delivery pipe is connected between the circulating pump and the water inlet, and the water return pipe is connected between the circulating pump and the water outlet.

Preferably, the device further comprises a heating device; the heating device is arranged in the cleaning tank and is used for heating the efficient descaling cleaning agent in the cleaning tank; the heating device comprises a heating wire and a heating rod; a storage table is arranged in the cleaning tank and connected to the inner wall of the cleaning tank, a gap is formed between one side of the storage table, which is far away from the water inlet, and the corresponding inner wall of the cleaning tank, and the storage table is hollow; the heating wire penetrates through the cleaning pool and is arranged at the hollow part of the object placing table, the heating rod is inserted into the bottom part close to the cleaning pool, and the central axis of the heating rod is perpendicular to the central axis of the cleaning pool.

Preferably, the heating rod comprises a handle, a rod body and a sealing gasket, wherein the rod body is arranged in the cleaning tank, the handle is provided with two ends which are respectively connected with the rod body, and the sealing gasket is sleeved on the outer wall of the handle and is attached to the outer wall of the cleaning tank.

Preferably, a filter plate is installed at the bottom of the object placing table and used for preventing the water scale which cannot be eliminated from entering the circulating pump from the water outlet through the water return pipe.

Preferably, a basket is placed on the upper part of the storage platform, and the cooling water pipe is placed on the storage platform through the basket.

Preferably, the cleaning device further comprises a brush and a telescopic device, wherein the telescopic device is connected with the tail end of the brush so as to extend into the cooling water pipe and move in the cooling water pipe.

Preferably, the telescopic device comprises a telescopic rod and a telescopic rod controller, wherein the telescopic rod controller penetrates through the cleaning tank, and the telescopic rod is arranged between the telescopic rod controller and the brush.

Preferably, the cleaning device further comprises a rotating device, wherein the rotating device is fixedly installed on the outer wall of the cleaning tank, and the rotating device is connected with one end of the telescopic rod controller.

Preferably, the rotating device comprises a rotating shaft and a motor, the motor is fixedly arranged on the outer wall of the cleaning tank, the telescopic rod controller is connected with the motor through the rotating shaft, and the rotating shaft is driven to rotate through the motor, so that the telescopic device is driven to rotate, and the purpose of rotating the brush is achieved.

Preferably, the water inlet is located above the water outlet.

(III) beneficial effects

The beneficial effects of the utility model are as follows:

1. according to the descaling device for the water cooler for the coal mine, the water inlet and the water outlet are formed in the outer wall of the cleaning tank, the water inlet and the water outlet are communicated with the interior of the cleaning tank, the circulating pump, the water pipe and the water return pipe are arranged at the same time, one end of the water pipe is connected with the water inlet of the cleaning tank, the other end of the water pipe is connected with the circulating pump, one end of the water return pipe is connected with the water outlet of the cleaning tank, the other end of the water return pipe is connected with the circulating pump, the cleaning tank, the circulating pump, the water pipe and the water return pipe form a circulating system, the efficient descaling cleaning agent can be recycled in the cleaning tank, the utilization rate of the efficient descaling cleaning agent is improved, the cost is reduced, and the device can clean the cooling water pipe without replacing the efficient descaling cleaning agent.

2. According to the descaling device for the water cooler for the coal mine, the heating device is arranged, so that the efficient descaling cleaning agent can be heated, the efficient descaling cleaning agent can play the maximum role, scale in a cooling water pipe or the efficient descaling cleaning agent can be cleaned more effectively, and the working efficiency is improved.

3. According to the descaling device for the water cooler for the coal mine, the object placing table is arranged, the object placing table is hollow, the heating wire is arranged at the hollow part, so that a cooling water pipe and a high-efficiency descaling cleaning agent around the cooling water pipe can be heated, scale can be particularly effectively eliminated, meanwhile, the object placing basket is arranged, the cooling water pipe is placed on the object placing table, and the cooling water pipe can be prevented from moving in the cleaning process; the heating rod is arranged at the bottom close to the cleaning tank, so that the efficient descaling cleaning agent in the cleaning tank can be heated, and the efficient descaling cleaning agent is always in a heated state, so that the efficient descaling cleaning agent can exert the maximum efficiency.

4. According to the descaling device for the water cooler for the coal mine, the hairbrush, the telescopic device and the rotating device are arranged, so that the inner wall of the cooling water pipe can be further cleaned, residual scale on the inner wall of the cooling water pipe is avoided, and the telescopic device can drive the hairbrush to move in the cooling water pipe so as to clean the scale on the inner wall of the whole cooling water pipe; the rotary device is arranged, the telescopic device can be driven to rotate, and then the hairbrush is driven to rotate in the cooling water pipe, so that the inner wall of the cooling water pipe is repeatedly cleaned, and scale on the inner wall of the cooling water pipe is effectively eliminated.

5. According to the descaling device for the water cooler for the coal mine, provided by the utility model, the unremoved scale can be prevented by arranging the filter plates, so that floating scale is prevented from entering the circulating pump, and equipment is prevented from being damaged.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a schematic view of a cleaning tank according to the present utility model;

FIG. 3 is a schematic view of a circulation device according to the present utility model;

FIG. 4 is a schematic view of a cleaning apparatus according to the present utility model;

FIG. 5 is a schematic cross-sectional view of a cleaning tank according to the present utility model;

FIG. 6 is a schematic view of the structure of the object placing table, the object placing basket and the heating wire;

fig. 7 is a schematic view of a heating rod according to the present utility model.

[ reference numerals description ]

1: a cleaning pool; 11: a water inlet; 12: a water outlet; 2: a heating device; 21: a heating rod; 211: a handle; 212: a rod body; 213: a sealing gasket; 22: a heating wire; 3: a basket; 4: a cooling water pipe; 5: a cleaning device; 51: a brush; 52: a telescoping device; 521: a telescopic rod; 522: a telescopic rod controller; 53: a rotating device; 531: a rotating shaft; 532: a motor; 6: a circulation device; 61: a circulation pump; 62: a water pipe; 63: a water return pipe; 7: a filter plate; 8: and a storage table.

Detailed Description

In order that the above-described aspects may be better understood, exemplary embodiments of the present utility model will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present utility model are shown in the drawings, it should be understood that the present utility model may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the utility model to those skilled in the art.

Example 1

As shown in fig. 1 to 7, the scale removing device of the water cooler for coal mines of the embodiment comprises a cleaning tank 1 and a circulating device 6, wherein the cleaning tank 1 is used for placing a cooling water pipe 4 of the water cooler for coal mines. The cleaning tank 1 is provided with a water inlet 11 and a water outlet 12 which are communicated with the inside of the cleaning tank 1, wherein the circulating device 6 comprises a circulating pump 61, a water pipe 62 and a water return pipe 63, the circulating pump 61 is positioned outside the cleaning tank 1, one end of the water pipe 62 is connected with the water inlet 11, the other end of the water return pipe 63 is connected with the water outlet 12, the other end of the water return pipe is connected with the circulating pump 61, the high-efficiency descaling cleaning agent is injected into the cleaning tank 1 through the injection of the high-efficiency descaling cleaning agent into the cleaning tank 1 from the water pipe 62, and then the high-efficiency descaling cleaning agent flows into the circulating pump 61 from the cleaning tank 1, so that the high-efficiency descaling cleaning agent is recycled, and the circulating descaling is formed.

Further, the inner wall of the cleaning tank 1 is connected with a storage table 8, one side of the storage table 8 far away from the water inlet 11 is provided with a gap with the inner wall of the corresponding cleaning tank 1, and the storage table 8 is hollow. Preferably, the heating device 2 is also included. The heating device 2 is arranged in the cleaning tank 1, the heating device 2 comprises a heating wire 22 and a heating rod 21, wherein the heating wire 22 is arranged at the hollow part of the object placing table 8 and penetrates through the outer wall of one side of the cleaning tank 1, and the part of the heating wire 22, which is exposed out of the outer wall of the cleaning tank 1, is used for being connected with an electric wire so as to electrify the heating wire 22, so that the heating wire 22 emits heat; the heating rod 21 is inserted at the bottom of the cleaning tank 1, the central axis of the heating rod 21 is perpendicular to the central axis of the cleaning tank 1, the heating rod 21 comprises handles 211, a rod body 212 and sealing gaskets 213, wherein the rod body 212 is arranged in the cleaning tank 1, two handles 211 and two sealing gaskets 213 are respectively arranged, the two handles 211 are respectively connected with two ends of the rod body 212, the two sealing gaskets 213 are respectively sleeved on the outer walls of the two handles 211, the two sealing gaskets 213 are attached to the outer wall of the cleaning tank 1, and the efficient descaling cleaning agent can be prevented from flowing out of the cleaning tank 1 in the cleaning tank 1 through the arrangement of the sealing gaskets 213; one end of the two handles 211 far away from the cleaning tank 1 is connected with an electric wire so as to electrify the rod 212, so that the rod 212 emits heat and the efficient descaling cleaning agent around the rod 212 is heated.

The storage basket 3 is arranged on the upper portion of the storage table 8, the cooling water pipes 4 are arranged in the storage basket 3, the storage basket 3 is formed by splicing a plurality of steel bars, mess of the cooling water pipes 4 in the cleaning process can be avoided, the steel bars have extremely high stability and corrosion resistance, and the service life of the storage basket 3 can be prolonged. The heating wire 22 arranged at the hollow part of the object placing table 8 can heat the efficient descaling cleaning agent around the cooling water pipe 4, so that the efficient descaling cleaning agent has the maximum efficiency, and can effectively ablate stubborn scale on the pipe wall of the cooling water pipe 4 and remove the scale on the cooling water pipe 4 more effectively. Preferably, the heating wire 22 and the heating rod 21 are arranged, so that the efficient descaling cleaning agent is always in a heated state, that is, the maximum efficiency of the efficient descaling cleaning agent can be always exerted. (As described herein, the heating rod 21 may be provided with two or more heating rods, which can improve the efficiency of the efficient descaling cleaner under different working demands.)

The filter plate 7 is arranged at the bottom of the object placing table 8, and the filter plate 7 can prevent the scale which cannot be eliminated from entering the circulating pump 61 from the water outlet 12 through the water return pipe 63, so that the circulating pump 61 is prevented from being damaged due to the entering of the scale.

Through above structure, the cooler descaling device for coal mine of this embodiment has following advantage:

(1) According to the descaling device for the water cooler for the coal mine, the circulating pump 61, the water conveying pipe 62 and the water return pipe 63 are arranged, so that the efficient descaling detergent injected into the cleaning tank 1 can be recycled, namely, the efficient descaling detergent enters the water return pipe 63 from the cleaning tank 1 and then enters the circulating pump 61, then enters the water conveying pipe 62 from the circulating pump 61 and then enters the cleaning tank 1, a circulation is formed, the efficient descaling detergent can be effectively utilized, the efficient descaling detergent does not need to be replaced, the cost is saved, the waste materials are reduced, and meanwhile, the working efficiency is improved.

(2) According to the descaling device for the water cooler for the coal mine, the object placing table 8 and the object placing basket 3 are arranged, the cooling water pipe 4 can be placed in the object placing basket 3, the object placing basket 3 is formed by splicing a plurality of steel bars, the stability and corrosion resistance of the object placing basket 3 can be improved, and the service life of the object placing basket 3 is prolonged; in the cleaning process of the cooling water pipe 4 in the cleaning tank 1, the object placing basket 3 can prevent the cooling water pipe 4 from jumping, is more stable in the cleaning process, and prevents the cooling water pipe 4 from colliding with another cooling water pipe 4 or the inner wall of the cleaning tank 1 due to the jumping, so that the cooling water pipe 4 is damaged.

(3) According to the descaling device for the water cooler for the coal mine, the heating wire 22 is arranged at the hollow part of the object placing table 8, so that the efficient descaling cleaning agent around the cooling water pipe 4 arranged in the object placing basket 3 can be heated, and the maximum efficiency can be exerted when the scale on the pipe wall of the cooling water pipe 4 is eliminated; the heating rod 21 is inserted near the bottom of the cleaning tank 1, so that the efficient descaling cleaning agent around the cleaning tank can be heated, and the maximum efficiency is always exerted. By arranging the heating wire 22 and the heating rod 21, the efficient descaling cleaning agent can always exert the maximum efficiency.

(4) According to the descaling device for the water cooler for the coal mine, the handles 211 are arranged at the two ends of the rod body 212 of the heating rod 21, the sealing gaskets 213 are sleeved on the outer walls of the handles 211, and the sealing gaskets 213 are attached to the outer walls of the cleaning tank 1, so that efficient descaling cleaning agent can be prevented from flowing out of the cleaning tank 1.

(5) According to the descaling device for the water cooler for the coal mine, the filter plate 7 is arranged at the bottom of the object placing table 8, so that unremoved scale can be prevented from flowing out of the cleaning tank 1, and the scale enters the circulating pump 61, and the circulating pump 61 is prevented from being damaged.

Furthermore, the cleaning devices 5 are fixedly installed on the outer wall of the cleaning tank 1, wherein the cleaning devices 5 are provided with a plurality of groups and are installed on the outer wall of the cleaning tank 1 (here, the plurality of groups of cleaning devices 5 can be installed on the outer wall of the same side of the cleaning tank 1 or on the outer wall of different sides of the cleaning tank 1), and the inner wall of the cooling water pipe 4 can be cleaned through the cleaning devices 5, so that the descaling process is more thorough.

Specifically, the cleaning device 5 includes a brush 51, a telescopic device 52 and a rotating device 53, the brush is placed in the cooling water pipe 4, the telescopic device 52 is connected with the tail end of the brush 51, and the brush 51 can extend into the cooling water pipe 4 and can move in the cooling water pipe 4 through the telescopic device 52; the rotating device 53 is connected with the telescopic device 52, and can drive the telescopic device 52 to rotate, and further drive the brush 51 to rotate, so that the inner wall of the cooling water pipe 4 is better cleaned.

More specifically, the telescopic device 52 includes a telescopic rod 521 and a telescopic rod controller 522, the front end of the telescopic rod 521 is connected with the tail end of the brush 51, the tail end of the telescopic rod 521 is connected with the telescopic rod controller 522, and the telescopic rod 521 can be controlled to stretch and retract through the telescopic rod controller 522, so that the brush 51 is driven to move; the rotating device 53 comprises a rotating shaft 531 and a motor 532, the motor 532 is fixedly arranged on the outer wall of the cleaning tank 1, the rotating shaft 531 penetrates through the outer wall of the cleaning tank 1 and is connected with the telescopic rod controller 522, the rotating shaft 531 is driven to rotate through the rotation of the motor 532, and then the telescopic rod controller 522, the telescopic rod 521 and the brush 51 are driven to rotate, so that the brush 51 can repeatedly clean the inner wall of the cooling water pipe 4, the force for cleaning the cooling water pipe 4 is higher, scale which is stubborn and adhered to the cooling water pipe 4 is cleaned, and then the scale is eliminated through the efficient descaling cleaner.

The working principle of the embodiment is as follows:

the apparatus is first installed, then the cooling water pipe 4 is placed in the basket 3, and the cooling water pipe 4 is aligned with the brush 51, and the efficient descaling detergent is injected into the washing tub 1, and then the cleaning apparatus 5, the circulation pump 61 and the heating apparatus 2 are energized to operate. At this time, the heating wire 22 and the heating rod 21 start to heat the efficient descaling detergent; meanwhile, the circulating pump 61 starts to recycle the efficient descaling detergent, so that the efficient descaling detergent flows according to a fixed flow direction; then the telescopic device 52 and the rotating device 53 are operated simultaneously, so that the brush 51 connected with the telescopic rod 521 simultaneously rotates and stretches, moves in the cooling water pipe 4 and repeatedly brushes the inner wall of the cooling water pipe 4, and the scale adhered on the cooling water pipe 4 is cleaned; the filter plate 7 then prevents unabated scale from entering the circulation pump 61. In the circulation process of the efficient descaling cleaning agent, the recycling of the efficient descaling cleaning agent is realized, the efficiency of the efficient descaling cleaning agent is improved, the working efficiency is improved, and the material waste is reduced.

After the work is finished, all power supplies are turned off, and the cooling water pipe 4 is taken out through the storage basket 3, so that the descaling is finished. The efficient descaling cleanser can be directly used for descaling the next cooling water pipe 4 without replacement.

Example two

Unlike the first embodiment, a transmission may be added to the motor 532, and the motor 532 may be driven at different rotational speeds using the transmission for different degrees of scale condensation in the cooling water pipe 4, thereby varying the rotational speed of the brush 51. Through installing the derailleur additional, can clean the cooling water pipe 4 that the degree of condensation incrustation scale is different, and then improve the suitability of device, make the application range of device wider, the suitability is bigger, makes the device not only can clean incrustation scale in the cooling water pipe 4, also can clean other parts.

In the description of the present utility model, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium; may be a communication between two elements or an interaction between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature is "on" or "under" a second feature, which may be in direct contact with the first and second features, or in indirect contact with the first and second features via an intervening medium. Moreover, a first feature "above," "over" and "on" a second feature may be a first feature directly above or obliquely above the second feature, or simply indicate that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is level lower than the second feature.

In the description of the present specification, the terms "one embodiment," "some embodiments," "examples," "particular examples," or "some examples," etc., refer to particular features, structures, materials, or characteristics described in connection with the embodiment or example as being included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that alterations, modifications, substitutions and variations may be made in the above embodiments by those skilled in the art within the scope of the utility model.

Claims (10)

1. The descaling device of the water cooler for the coal mine is characterized by comprising a cleaning tank (1) for placing a cooling water pipe (4) of the water cooler for the coal mine and a circulating device (6);

a water inlet (11) and a water outlet (12) which are communicated with the inside of the cleaning tank (1) are formed in the cleaning tank;

the circulating device (6) comprises a circulating pump (61), a water conveying pipe (62) and a water return pipe (63), wherein the circulating pump (61) is located outside the cleaning tank (1), the water conveying pipe (62) is connected between the circulating pump (61) and the water inlet (11), and the water return pipe (63) is connected between the circulating pump (61) and the water outlet (12).

2. A water chiller de-scaling apparatus for coal mines as claimed in claim 1 wherein:

also comprises a heating device (2);

the heating device (2) is arranged in the cleaning tank (1) and is used for heating the efficient descaling detergent in the cleaning tank (1);

the heating device (2) comprises a heating wire (22) and a heating rod (21);

a storage table (8) is arranged in the cleaning tank (1), the storage table (8) is connected to the inner wall of the cleaning tank (1), a gap is formed between one side, away from the water inlet (11), of the storage table (8) and the corresponding inner wall of the cleaning tank (1), and the interior of the storage table (8) is hollow;

the heating wire (22) penetrates through the cleaning tank (1) to be placed at the hollow part of the object placing table (8), the heating rod (21) is inserted in the bottom part close to the cleaning tank (1), and the central axis of the heating rod (21) is perpendicular to the central axis of the cleaning tank (1).

3. A water chiller de-scaling apparatus for coal mines as claimed in claim 2 wherein:

the heating rod (21) comprises a handle (211), a rod body (212) and a sealing gasket (213), wherein the rod body (212) is arranged in the cleaning tank (1), the handle (211) is provided with two ends which are respectively connected with the rod body (212), and the sealing gasket (213) is sleeved on the outer wall of the handle (211) and is attached to the outer wall of the cleaning tank (1).

4. A water chiller de-scaling apparatus for coal mines as claimed in claim 2 wherein:

the bottom of the object placing table (8) is provided with a filter plate (7) for preventing the un-eliminated scale from entering the circulating pump (61) from the water outlet (12) through the water return pipe (63).

5. A water chiller de-scaling apparatus for coal mines as claimed in claim 2 wherein:

the upper part of the object placing table (8) is provided with an object placing basket (3), and the cooling water pipe (4) is arranged on the object placing table (8) through the object placing basket (3).

6. A water chiller de-scaling apparatus for coal mines as claimed in claim 1 wherein:

the cleaning device (5) comprises a brush (51) and a telescopic device (52), and the telescopic device (52) is connected with the tail end of the brush (51) so as to extend into the cooling water pipe (4) and move in the cooling water pipe (4).

7. The apparatus for descaling a water cooler for coal mines according to claim 6, wherein:

the telescopic device (52) comprises a telescopic rod (521) and a telescopic rod controller (522), wherein the telescopic rod controller (522) penetrates through the cleaning tank (1) and the telescopic rod (521) is arranged between the telescopic rod controller (522) and the brush (51).

8. The water cooler descaling device for coal mines as claimed in claim 7, wherein:

the cleaning device (5) further comprises a rotating device (53), the rotating device is fixedly arranged on the outer wall of the cleaning tank (1), and the rotating device (53) is connected with one end of the telescopic rod controller (522).

9. The water cooler descaling device for coal mines as claimed in claim 8, wherein:

the rotating device (53) comprises a rotating shaft (531) and a motor (532), the motor (532) is fixedly arranged on the outer wall of the cleaning tank (1), the telescopic rod controller (522) is connected with the motor (532) through the rotating shaft (531), the motor (532) drives the rotating shaft (531) to rotate, and then the telescopic device (52) is driven to rotate, so that the purpose of rotating the brush (51) is achieved.

10. A water chiller de-scaling apparatus for coal mines as claimed in claim 1 wherein:

the water inlet (11) is positioned above the water outlet (12).