CN214946806U - Backflow preventer with alarm function - Google Patents

Abstract

The utility model discloses a backflow preventer with alarming function. A backflow preventer with an alarm function comprises a valve body, a valve cover, a water inlet check valve clack, a water outlet check valve clack, a water drain valve rod, a water inlet check valve shaft sleeve, 3 water inlet check valve shaft sleeve fixing strip-shaped blocks and a water inlet check valve clack reset sealing spring; the water outlet check valve shaft, the left shaft sleeve of the water outlet check valve shaft, the right shaft sleeve of the water outlet check valve shaft and the valve clack of the water outlet check valve reset sealing spring; the device also comprises a valve clack opening alarm prompting device of the water escape valve. The purpose of conveniently observing and judging whether the valve clack of the water drain valve of the backflow preventer is normally opened for draining is realized, the reason that the valve clack of the water drain valve of the backflow preventer cannot be normally opened is eliminated in time, the automatic normal opening of the water drain valve clack is realized, and the medium backflow is prevented from polluting an upstream water source.

Description

Backflow preventer with alarm function

Technical Field

The utility model belongs to a backflow preventer, in particular to a backflow preventer with an alarm function.

Background

The backflow preventer generally includes a valve body, a valve cover, a water inlet check valve flap, a water outlet check valve flap, and a water drain valve flap. The backflow preventer is a hydraulic control combination device which strictly limits the water flow in the pipeline to only flow in one direction under the condition that a running water supply device, especially a domestic drinking water pipeline, has serious backflow pollution and no effective backflow pollution preventing device, and has the function of preventing the medium in the pipeline from flowing backwards under any working condition so as to achieve the purpose of avoiding backflow pollution. When the existing backflow preventer works normally, water enters from the water inlet end of the valve body, the valve clacks of the water inlet check valve and the water outlet check valve are opened in sequence, media flow, and after upstream flow cutoff, the valve clacks of the water inlet check valve and the water outlet check valve are closed, and the water drainage valve clack opens water drainage; however, the existing backflow preventer sometimes has the phenomenon that the drain valve flap cannot be normally opened, and meanwhile, when the water outlet check valve flap of the backflow preventer is not closed tightly or damaged, the medium cannot be prevented from flowing backwards so as to pollute an upstream water source. Patrolmen usually judge whether current backflow preventer sluicing valve clack normally opens the sluicing through observing the sluicing valve sluicing, and this kind of mode of judging whether current backflow preventer sluicing valve clack normally opens the sluicing through observing the sluicing valve sluicing is because natural factors such as external installation environment, rainy day weather, dark are inconvenient for observe. How convenient observation judges whether the refluence preventer sluicing valve clack normally opens the sluicing, in time eliminates the reason that the refluence preventer sluicing valve clack can not normally open, realizes the automation of sluicing valve clack and normally opens, prevents that the medium refluence from polluting the upstream water source and is the problem that needs the solution.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: provided is a backflow preventer with an alarm function. Whether the valve clack of the water drain valve of the backflow preventer can be normally opened for draining is conveniently observed and judged by using the backflow preventer with the alarm function, the reason that the valve clack of the water drain valve of the backflow preventer cannot be normally opened is timely eliminated, the automatic normal opening of the water drain valve clack is realized, and the medium backflow is prevented from polluting an upstream water source.

The utility model provides a technical scheme of above-mentioned technical problem is: the utility model provides a backflow preventer with alarming function, includes valve body, valve gap, the check valve clack that intakes, the check valve disk seat that intakes, the check valve clack that goes out, the check valve disk seat that goes out, sluicing valve clack, sluicing disk seat, sluicing valve rod, the junction of valve body and valve gap uses bolt fixed mounting the diaphragm, and sluicing valve rod upper end passes the diaphragm and uses upper and lower splint, sealing washer and hexagon nut and the sealed fixed connection of diaphragm, constitutes the cavity under the diaphragm upper surface and the valve gap between the bottom surface, constitutes the cavity under the valve body between bottom surface and the sluicing disk seat under the diaphragm, the valve body has into water end, goes out the water end, still includes discharge valve, and the discharge valve screw thread link up and installs on the screw hole that the valve gap right side set up characterized by: the water inlet check valve also comprises a water inlet check valve shaft, a water inlet check valve shaft sleeve and 3 water inlet check valve shaft sleeve fixing strip-shaped blocks, wherein one end of each of the 3 water inlet check valve shaft sleeve fixing strip-shaped blocks is fixedly connected with the inner surface of the cavity at the water inlet end of the valve body, which is close to one side of the water inlet check valve seat, at equal intervals, the other end of each of the 3 water inlet check valve shaft sleeve fixing strip-shaped blocks is fixedly connected with the outer surface of the water inlet check valve shaft sleeve at equal intervals, the vertical section of the water inlet check valve shaft sleeve fixedly arranged on the inner surface of the cavity at the water inlet end of the valve body, which is close to one side of the water inlet check valve seat, is parallel to the vertical section at the water inlet end of the valve body, one end of the water inlet check valve shaft penetrates through the water inlet check valve shaft sleeve and is fixedly connected with the water inlet check valve clack arranged on the water inlet check valve seat, and the part of the water inlet check valve shaft, which is positioned at the other side of the check valve shaft sleeve forms a vacant end, the end part of the vacant end formed by the water inlet check valve shaft and the water inlet check valve shaft on the other side of the water inlet check valve shaft sleeve is provided with a round nut, the vacant end part of the water inlet check valve shaft between the water inlet check valve shaft sleeve and the round nut is sleeved with a water inlet check valve clack reset sealing spring, and in an initial state, the water inlet check valve clack reset sealing spring pulls the water inlet check valve clack to be sealed on a water inlet check valve seat;

the water outlet check valve comprises a valve body, a water outlet check valve shaft, a left shaft sleeve of the water outlet check valve shaft and 3 left shaft sleeve fixing strip-shaped blocks of the water outlet check valve, wherein one end of each left shaft sleeve fixing strip-shaped block of the 3 water outlet check valve is respectively and sequentially fixedly connected with the inner surface of one side, close to the valve seat of the water outlet check valve, of the cavity at the water outlet end of the valve body at equal intervals; the water outlet check valve shaft sleeve is characterized by further comprising a water outlet check valve shaft right shaft sleeve and 3 water outlet check valve right shaft sleeve fixing strip-shaped blocks, one ends of the 3 water outlet check valve right shaft sleeve fixing strip-shaped blocks are respectively and sequentially fixedly connected with the inner surface of the water outlet end cavity of the valve body on the side close to the water outlet at equal intervals, the other ends of the 3 water outlet check valve right shaft sleeve fixing strip-shaped blocks are respectively and sequentially fixedly connected with the outer surface of the water outlet check valve shaft right shaft sleeve at equal intervals, and the vertical section of the water outlet check valve shaft right shaft sleeve fixedly installed on the inner surface of the water outlet end cavity of the valve body on the side close to the water outlet is parallel to the vertical section of the water outlet end of the valve body; one end of the water outlet check valve shaft penetrates through the left shaft sleeve of the water outlet check valve shaft and is fixedly connected with a valve clack of the water outlet check valve arranged on a valve seat of the water outlet check valve in a threaded manner, the part of the water outlet check valve shaft positioned on the left vertical surface of the left shaft sleeve of the water outlet check valve shaft is a free end, the other end of the water outlet check valve shaft penetrates through the right shaft sleeve of the water outlet check valve shaft in a sliding manner and is arranged on the right shaft sleeve of the water outlet check valve shaft, a valve clack reset sealing spring of the water outlet check valve is arranged on the part of the water outlet check valve shaft positioned between the valve clack of the water outlet check valve and the right shaft sleeve of the water outlet check valve shaft, and in an initial state, the valve clack reset sealing spring of the water outlet check valve pushes the valve clack of the water outlet check valve to be sealed on the valve seat of the water outlet check valve;

the water drain valve comprises a diaphragm, a valve cover, a mounting hole, a touch switch thread and a touch switch, wherein the valve cover is arranged on the upper part of the diaphragm; in the initial state, a contact of the touch switch arranged on the touch switch mounting hole is not contacted with the top surface of the upper end part of the drain valve rod, and the alarm indicating lamp circuit is in a normally open state.

When the utility model is in a normal working state, water enters from the water inlet end of the valve body, the valve clack of the water inlet check valve and the valve clack of the water outlet check valve are opened in sequence, media flow, after upstream flow break, the valve clack of the water inlet check valve and the valve clack of the water outlet check valve are closed under the action of the valve clack reset sealing spring of the water inlet check valve and the valve clack reset sealing spring of the water outlet check valve respectively, the pressure of a lower cavity of the valve body formed between the lower bottom surface of the diaphragm and the drain valve seat is greater than the pressure of an upper cavity formed by the upper top surface of the diaphragm and the lower bottom surface of the valve cover, and the diaphragm is pushed to move upwards to open the valve clack of the drain valve; simultaneously diaphragm sluicing valve rod upward movement, the upper end top surface top of sluicing valve rod holds in the palm the touch switch contact and realizes that the touch switch is closed, and alarm indicator circuit is closed, and alarm indicator sends out the flash of light, the utility model discloses the flow backwards preventer sluicing valve clack is normally opened and is sluiced. When the valve clack of the backflow preventer is opened, the alarm indicator lamp emits no flash light, namely the valve clack of the backflow preventer is opened; maintenance personnel eliminate in time the reason that backflow preventer sluicing valve clack can not normally be opened, realize the automatic normal opening of sluicing valve clack, prevent that the medium from flowing backwards and polluting the upstream water source.

The touch switch, the alarm indicator lamp and the electric connection of the touch switch and the alarm indicator lamp all adopt the prior art.

The utility model has the advantages that: because the utility model is provided with the valve body, the valve cover, the water inlet check valve clack, the water inlet check valve seat, the water outlet check valve clack, the water outlet check valve seat, the water drain valve clack, the water drain valve seat and the water drain valve rod, the diaphragm is fixedly arranged at the joint of the valve body and the valve cover by using the bolt, and the upper end part of the water drain valve rod passes through the diaphragm and is fixedly connected with the diaphragm by using the upper clamping plate, the lower clamping plate, the sealing ring and the hexagon nut; the water inlet check valve shaft is sleeved with a water inlet check valve clack reset sealing spring at a vacant end part between the water inlet check valve shaft sleeve and the round nut; the water outlet check valve is characterized by also comprising a water outlet check valve shaft, a left shaft sleeve of the water outlet check valve shaft, a left shaft sleeve fixing strip-shaped block of 3 water outlet check valves, a right shaft sleeve of the water outlet check valve shaft and a right shaft sleeve fixing strip-shaped block of 3 water outlet check valves, wherein one end of the water outlet check valve shaft passes through the left shaft sleeve of the water outlet check valve shaft and is fixedly connected with a valve flap of the water outlet check valve arranged on a valve seat of the water outlet check valve in a threaded manner, the part of the water outlet check valve shaft positioned on the left vertical surface of the left shaft sleeve of the water outlet check valve shaft is a free end, the other end of the water outlet check valve shaft passes through the right shaft sleeve of the water outlet check valve shaft in a sliding manner and is arranged on the right shaft sleeve of the water outlet check valve shaft, and a part of the water outlet check valve shaft positioned between the water outlet check valve shaft and the right shaft sleeve of the water outlet check valve shaft is provided with a water outlet check valve flap reset sealing spring; the water drain valve is characterized by also comprising a water drain valve clack opening alarm prompting device, wherein the water drain valve clack opening alarm prompting device comprises a touch switch and an alarm indicator lamp, a touch switch mounting hole is formed in a valve cover corresponding to the end part of the water drain valve rod positioned on the upper part of the top surface of the diaphragm, touch switch threads are mounted in the touch switch mounting hole, the alarm indicator lamp is mounted on the top surface of the left side of the valve cover by using a mounting seat, and the alarm indicator lamp mounted on the top surface of the left side of the valve cover by using the mounting seat is electrically connected with the touch switch; in the initial state, a contact of the touch switch arranged on the touch switch mounting hole is not contacted with the top surface of the upper end part of the drain valve rod, and the alarm indicating lamp circuit is in a normally open state. Realize the utility model discloses backflow preventer sluicing valve clack with alarming function is automatic normally to be opened and close. The utility model discloses a convenient observation judges whether the purpose of sluicing is normally opened to backflow preventer drain valve clack, in time eliminates the reason that backflow preventer drain valve clack can not normally be opened, has realized the automation of sluicing valve clack and has normally opened, has prevented that the medium from flowing backwards and polluting the upper reaches water source. The technical problem that whether the valve clack of the water drain valve of the existing backflow preventer is normally opened for draining water or not is inconvenient to observe due to external installation environment, rainy weather, dark and other natural factors is solved.

Because the utility model is provided with the water outlet check valve shaft, the left shaft sleeve of the water outlet check valve shaft, the fixed strip-shaped blocks of the left shaft sleeves of the 3 water outlet check valves, the right shaft sleeve of the water outlet check valve shaft and the fixed strip-shaped blocks of the right shaft sleeves of the 3 water outlet check valves, one end of the water outlet check valve shaft passes through the left shaft sleeve of the water outlet check valve shaft and is fixedly connected with the valve clack of the water outlet check valve arranged on the valve seat of the water outlet check valve, and the other end of the water outlet check valve shaft passes through the right shaft sleeve of the water outlet check valve shaft in a sliding way and is arranged on the right shaft sleeve of the water outlet check valve shaft; the stability of play water non return valve shaft in the operation of play water non return valve shaft left axle sleeve, play water non return valve shaft right axle sleeve is improved, the water non return leakproofness of going out the water check valve clack has been improved.

Drawings

The present invention will be further explained with reference to the drawings and examples;

fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a partial enlarged view of the present invention;

in the drawings: 1. the water outlet check valve comprises a valve body, a valve cover, a water inlet check valve clack, a water outlet check valve clack, a water draining valve rod, a diaphragm, a water inlet end, a water outlet end, a water inlet check valve shaft sleeve, a water outlet check valve clack, a water outlet check valve shaft, a water outlet check valve clack, a water outlet check valve shaft sleeve, a water outlet check valve clack, a water outlet check valve shaft, a water outlet check valve clack, a water outlet check valve, a water outlet.

Detailed Description

The present invention will be described in further detail with reference to the following examples.

Example 1

As shown in fig. 1 and 2, a backflow preventer with alarm function, including valve body 1, valve gap 2, water inlet check valve clack 3, water inlet check valve disk seat, water outlet check valve clack 4, water outlet check valve disk seat, sluicing valve clack 5, sluicing valve seat, sluicing valve rod 6, the junction of valve body 1 and valve gap 2 is using bolt fixed mounting diaphragm 7, and 6 upper ends of sluicing valve rod pass diaphragm 7 and use upper and lower splint, sealing washer and hexagon nut and diaphragm 7 sealing fixed connection, constitute the upper plenum body between diaphragm 7 upper surface and the valve gap 2 lower bottom surface, constitute cavity under the valve body between diaphragm 7 lower bottom surface and the sluicing valve seat, valve body 1 has water inlet end 8, water outlet end 9, characterized by: the water inlet check valve also comprises a water inlet check valve shaft 10, a water inlet check valve shaft sleeve 11 and 3 water inlet check valve shaft sleeve fixing strip-shaped blocks 12, wherein one end of each of the 3 water inlet check valve shaft sleeve fixing strip-shaped blocks 12 is respectively and sequentially fixedly connected with the inner surface of one side of the cavity of the water inlet end 8 of the valve body, which is close to the valve seat of the water inlet check valve, at equal intervals, the other end of each of the 3 water inlet check valve shaft sleeve fixing strip-shaped blocks 12 is respectively and sequentially fixedly connected with the outer surface of the water inlet check valve shaft sleeve 11 at equal intervals, the vertical section of the water inlet check valve shaft sleeve 11, which is fixedly arranged on the inner surface of one side of the cavity of the water inlet end 8 of the valve body, which is close to the valve seat of the water inlet check valve, is parallel to the vertical section of the water inlet end 8 of the valve body, one end of the water inlet check valve shaft 10 penetrates through the water inlet check valve shaft sleeve 11 and is fixedly connected with a water inlet check valve flap 3 arranged on the valve seat of the water inlet check valve, the part of the water inlet check valve shaft 10, which is positioned at the other side of the water inlet check valve shaft sleeve 11, forms a vacant end, the end part of the vacant end, which is formed by the water inlet check valve shaft 10, which is positioned at the other side of the water inlet check valve shaft sleeve 11, is provided with a round nut, the vacant end part, which is positioned between the water inlet check valve shaft sleeve 11 and the round nut, of the water inlet check valve shaft 10 is sleeved with a water inlet check valve clack reset sealing spring 13, and in an initial state, the water inlet check valve clack reset sealing spring 13 pulls the water inlet check valve clack 3 to be sealed on a water inlet check valve seat;

the water outlet check valve comprises a valve body, a water outlet check valve shaft left shaft sleeve, 3 water outlet check valve shaft left shaft sleeve fixing strip-shaped blocks, wherein an observer faces the utility model, the left side of the observer is the water outlet check valve shaft left shaft sleeve, one ends of the 3 water outlet check valve shaft left shaft sleeve fixing strip-shaped blocks are respectively and sequentially fixedly connected with the inner surface of the side, close to the water outlet check valve seat, of a cavity at the water outlet end 9 of the valve body at equal intervals, the other ends of the 3 water outlet check valve shaft left shaft sleeve fixing strip-shaped blocks are respectively and sequentially and fixedly connected with the outer surface of the water outlet check valve shaft left shaft sleeve 15 at equal intervals, and the vertical section of the water outlet check valve shaft left shaft sleeve 15 fixedly installed on the inner surface of the side, close to the water outlet check valve seat, of the cavity at the water outlet check valve of the valve body is parallel to the vertical section of the water outlet end 9 of the valve body by using the 3 water outlet check valve shaft left shaft sleeve fixing strip-shaped blocks; the water outlet check valve shaft sleeve is characterized by further comprising a water outlet check valve shaft right shaft sleeve 16 and 3 water outlet check valve right shaft sleeve fixing strip-shaped blocks (an observer faces the utility model, the right side of the observer is the water outlet check valve shaft right shaft sleeve), one end of each of the 3 water outlet check valve right shaft sleeve fixing strip-shaped blocks is fixedly connected with the inner surface of the water outlet end 9 cavity of the valve body, which is close to the water outlet side, at equal intervals, the other end of each of the 3 water outlet check valve right shaft sleeve fixing strip-shaped blocks is fixedly connected with the outer surface of the water outlet check valve shaft right shaft sleeve 16 at equal intervals, and the vertical section of the water outlet check valve shaft right shaft sleeve 16 fixedly installed on the inner surface of the water outlet end 9 cavity of the valve body, which is close to the water outlet side, is parallel to the vertical section of the water outlet end 9 of the valve body; one end of the water outlet check valve shaft 14 penetrates through the left shaft sleeve 15 of the water outlet check valve shaft and is fixedly connected with a water outlet check valve clack 4 arranged on a valve seat of the water outlet check valve in a threaded manner, the part of the water outlet check valve shaft 14, which is positioned on the left vertical surface of the left shaft sleeve 15 of the water outlet check valve shaft, is a free end, the other end of the water outlet check valve shaft 14 penetrates through the right shaft sleeve 16 of the water outlet check valve shaft in a sliding manner and is installed on the right shaft sleeve 16 of the water outlet check valve shaft, a water outlet check valve clack reset sealing spring 17 is installed on the part, which is positioned between the water outlet check valve clack 4 and the right shaft sleeve 16 of the water outlet check valve shaft, and in an initial state, the water outlet check valve clack reset sealing spring 17 pushes the water outlet check valve clack 4 to be sealed on the water outlet check valve seat;

the water drain valve comprises a water drain valve clack opening alarm prompting device, wherein the water drain valve clack opening alarm prompting device comprises a touch switch 18 and an alarm indicator lamp 19, a touch switch mounting hole is formed in a valve cover 2 corresponding to the end part of the upper part of a water drain valve rod 6 on the top surface of a diaphragm 7, the touch switch 18 is installed on the touch switch mounting hole in a threaded mode, the alarm indicator lamp 19 is installed on the top surface of the left side of the valve cover 2 through an installation seat, and the alarm indicator lamp 19 installed on the top surface of the left side of the valve cover 2 through the installation seat is electrically connected with the touch switch 18; in the initial state, the touch switch 18 installed in the touch switch installation hole has a contact which is not in contact with the top surface of the upper end part of the drain valve rod 6, and the circuit of the alarm indicator lamp 19 is in a normally open state.

From the above description, those skilled in the art can make various changes and modifications without departing from the technical spirit of the present invention, and the present invention is within the protection scope of the present invention. The present invention is not to be considered as the best thing, and belongs to the common general knowledge of the technicians in the field.

Claims (1)

1. The utility model provides a backflow preventer with alarming function, includes valve body, valve gap, the check valve clack that intakes, the check valve disk seat that intakes, the check valve clack that goes out, the check valve disk seat that goes out, sluicing valve clack, sluicing disk seat, sluicing valve rod, the junction of valve body and valve gap uses bolt fixed mounting the diaphragm, and sluicing valve rod upper end passes the diaphragm and uses upper and lower splint, sealing washer and hexagon nut and the sealed fixed connection of diaphragm, constitutes the cavity under the diaphragm upper surface and the valve gap between the bottom surface, constitutes cavity under the diaphragm between bottom surface and the sluicing disk seat, the valve body has into water end, play water end, characterized by: the water inlet check valve also comprises a water inlet check valve shaft, a water inlet check valve shaft sleeve and 3 water inlet check valve shaft sleeve fixing strip-shaped blocks, wherein one end of each of the 3 water inlet check valve shaft sleeve fixing strip-shaped blocks is fixedly connected with the inner surface of the cavity at the water inlet end of the valve body, which is close to one side of the water inlet check valve seat, at equal intervals, the other end of each of the 3 water inlet check valve shaft sleeve fixing strip-shaped blocks is fixedly connected with the outer surface of the water inlet check valve shaft sleeve at equal intervals, the vertical section of the water inlet check valve shaft sleeve fixedly arranged on the inner surface of the cavity at the water inlet end of the valve body, which is close to one side of the water inlet check valve seat, is parallel to the vertical section at the water inlet end of the valve body, one end of the water inlet check valve shaft penetrates through the water inlet check valve shaft sleeve and is fixedly connected with the water inlet check valve clack arranged on the water inlet check valve seat, and the part of the water inlet check valve shaft, which is positioned at the other side of the check valve shaft sleeve forms a vacant end, the end part of the vacant end formed by the water inlet check valve shaft and the water inlet check valve shaft on the other side of the water inlet check valve shaft sleeve is provided with a round nut, the vacant end part of the water inlet check valve shaft between the water inlet check valve shaft sleeve and the round nut is sleeved with a water inlet check valve clack reset sealing spring, and in an initial state, the water inlet check valve clack reset sealing spring pulls the water inlet check valve clack to be sealed on a water inlet check valve seat;

the water outlet check valve comprises a valve body, a water outlet check valve shaft, a left shaft sleeve of the water outlet check valve shaft and 3 left shaft sleeve fixing strip-shaped blocks of the water outlet check valve, wherein one end of each left shaft sleeve fixing strip-shaped block of the 3 water outlet check valve is respectively and sequentially fixedly connected with the inner surface of one side, close to the valve seat of the water outlet check valve, of the cavity at the water outlet end of the valve body at equal intervals; the water outlet check valve shaft sleeve is characterized by further comprising a water outlet check valve shaft right shaft sleeve and 3 water outlet check valve right shaft sleeve fixing strip-shaped blocks, one ends of the 3 water outlet check valve right shaft sleeve fixing strip-shaped blocks are respectively and sequentially fixedly connected with the inner surface of the water outlet end cavity of the valve body on the side close to the water outlet at equal intervals, the other ends of the 3 water outlet check valve right shaft sleeve fixing strip-shaped blocks are respectively and sequentially fixedly connected with the outer surface of the water outlet check valve shaft right shaft sleeve at equal intervals, and the vertical section of the water outlet check valve shaft right shaft sleeve fixedly installed on the inner surface of the water outlet end cavity of the valve body on the side close to the water outlet is parallel to the vertical section of the water outlet end of the valve body; one end of the water outlet check valve shaft penetrates through the left shaft sleeve of the water outlet check valve shaft and is fixedly connected with a valve clack of the water outlet check valve arranged on a valve seat of the water outlet check valve in a threaded manner, the part of the water outlet check valve shaft positioned on the left vertical surface of the left shaft sleeve of the water outlet check valve shaft is a free end, the other end of the water outlet check valve shaft penetrates through the right shaft sleeve of the water outlet check valve shaft in a sliding manner and is arranged on the right shaft sleeve of the water outlet check valve shaft, a valve clack reset sealing spring of the water outlet check valve is arranged on the part of the water outlet check valve shaft positioned between the valve clack of the water outlet check valve and the right shaft sleeve of the water outlet check valve shaft, and in an initial state, the valve clack reset sealing spring of the water outlet check valve pushes the valve clack of the water outlet check valve to be sealed on the valve seat of the water outlet check valve;

the water drain valve comprises a diaphragm, a valve cover, a mounting hole, a touch switch thread and a touch switch, wherein the valve cover is arranged on the upper part of the diaphragm; in the initial state, a contact of the touch switch arranged on the touch switch mounting hole is not contacted with the top surface of the upper end part of the drain valve rod, and the alarm indicating lamp circuit is in a normally open state.

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