A domestic cold and hot water supply system pressure control and pressure relief integrated combination valve device and method

Abstract

The application belongs to the technical field of valves, and particularly relates to a pressure control and pressure relief integrated combined valve device and method for a household cold and hot water supply system. The device comprises a pressure relief valve, the upper end of the pressure relief valve is threadedly connected with a blowdown port in the side wall of a main pipe body, one end of the main pipe body is fixedly communicated with an inner container of a water heater, the other end of the main pipe body is fixedly communicated with a first pressure control valve, one end of the first pressure control valve is fixedly connected with a water inlet pipe through a ball valve, the lower end of the pressure relief valve is fixedly communicated with a second pressure control valve, and the second pressure control valve is fixedly communicated with a blowdown pipe. The device can not only automatically realize the integration of pressure control and pressure relief, but also can periodically and centrally clean all the scale residues in the valve bodies and perform blowdown work. The device can not only realize the integration of pressure control and pressure relief, but also can avoid the problem that the connection is blocked by scale and cannot be disassembled. The device can comprehensively make the pressure relief and blowdown more convenient.

Description

Technical Field

[0001] This invention belongs to the field of valve technology, specifically relating to a combined valve device and method for pressure control and pressure relief in a household hot and cold water supply system. Background Technology

[0002] A domestic hot and cold water supply system is used to provide hot and cold water in a home to meet daily needs. This system typically includes a water source, pipes, a water heater, and related valves and fittings. Through proper layout and design, the system can ensure a stable and reliable water supply in various locations (such as the kitchen, bathroom, and laundry room), providing both comfortable hot water and a sufficient supply of cold water, thereby improving the comfort and convenience of family life.

[0003] After a period of use, water heaters will accumulate scale and other impurities, requiring the inner tank to be drained, which usually involves using a drain valve.

[0004] Chinese Patent Application No. 201910179267.4 discloses a drain valve and an electric water heater. The drain valve includes an electric control switch, a housing, a magnetic impeller, and an opening / closing device. The housing has an inlet and an outlet, both communicating with the interior of the housing. The opening / closing device is movably mounted on the housing for opening or closing the inlet. The magnetic impeller is located inside the housing, and a coil layer is provided within the housing, with at least a portion of the magnetic impeller situated within the coil layer. The electric control switch is electrically connected to both the coil layer and the opening / closing device. This invention provides a drain valve that enables automated control of the draining process, improves user experience, and provides better draining performance.

[0005] Sewage outlets are prone to scaling due to water quality factors, causing them to malfunction and become impossible to open when sewage needs to be discharged. Furthermore, the presence of high-pressure hot water inside the drain valve can cause water spray and injury when initially opened. Additionally, the small diameter of the drain outlet combined with large pieces of scale inside the tank can clog it, hindering sewage flow. Moreover, opening the drain valve usually requires specialized tools, and its structure makes it even more difficult to open, hindering home cleaning and maintenance. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a combined pressure control and pressure relief valve device and method for a household hot and cold water supply system. Through the structural cooperation of the pressure relief valve, the first pressure control valve, and the second pressure control valve, this invention not only enables automatic pressure control and relief but also allows for periodic and centralized cleaning of scale residue inside all valve bodies and sewage discharge, preventing valve blockage that could affect equipment safety. Furthermore, the cooperation between the intermediate pipe and the inner pipe mechanism not only achieves automatic pressure control and relief but also avoids the problem of scale buildup blocking the connections during disassembly, allowing for easy manual disassembly. Finally, the cooperation between the adjustment mechanism, the sealing disc, and the limit rod prevents blockage during sewage discharge, making pressure relief and sewage discharge more convenient overall.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A pressure control and pressure relief integrated combination valve device for a household hot and cold water supply system includes a pressure relief valve, the upper end of which is threadedly connected to a drain port on the side wall of a main pipe; one end of the main pipe is fixedly connected to the inner tank of a water heater, and the other end of the main pipe is fixedly connected to a first pressure control valve; one end of the first pressure control valve is fixedly connected to an inlet pipe via a ball valve; and the lower end of the pressure relief valve is fixedly connected to a second pressure control valve, which is fixedly connected to the drain pipe. The first pressure control valve includes a valve tube, and an abutment mesh ring is fixedly connected to one end of the valve tube near the main body. The abutment mesh ring is fixedly connected to a frustum plug by a pressure spring. An abutment groove is fixedly provided on the inner wall of the valve tube at the end away from the main body, and the frustum plug abuts against the abutment groove. The second pressure control valve has the same structure as the first pressure control valve, and one end of the abutment groove of the second pressure control valve is close to the side of the pressure relief valve.

[0008] Furthermore, the pressure relief valve includes an intermediate pipe, the upper end of which is threadedly connected to the drain port on the side wall of the main pipe; the lower end of the intermediate pipe is threadedly connected to the upper end of the control pipe; a limiting ring is fixedly provided in the middle of the inside of the control pipe, the upper end of which abuts against a rubber sealing disc, and a limiting rod is fixedly connected to the top middle of the rubber sealing disc. The drain outlet is internally slidably connected to an inner tube mechanism, the lower end of which abuts against the top of a rubber sealing disc; the bottom of the rubber sealing disc is provided with water passage grooves evenly spaced around it.

[0009] Furthermore, the intermediate pipe includes a first intermediate pipe, a second intermediate pipe, a third intermediate pipe, and a fourth intermediate pipe that are fixedly connected to each other; the inner wall thread of the first intermediate pipe is threadedly connected to the drain outlet; and the outer wall thread of the fourth intermediate pipe is threadedly connected to the upper end of the control pipe.

[0010] Furthermore, the inner tube mechanism includes an inner tube body; the upper outer wall of the inner tube body is symmetrically fixed with guide strips, and the inner side wall of the drain outlet is symmetrically provided with guide grooves, the guide grooves being slidably connected to the guide strips; the lower outer wall of the inner tube body is provided with a threaded line and is threadedly connected to the inner wall threaded line of the fourth intermediate tube.

[0011] Furthermore, when the intermediate tube is rotated and tightened with the drain outlet, the inner tube mechanism moves downward; when the intermediate tube is rotated and unscrewed with the drain outlet, the inner tube mechanism moves upward.

[0012] Furthermore, the inner wall of the second intermediate tube is fitted to the inner tube body, and an installation ring groove is provided in the middle of the inner wall of the second intermediate tube and a first rubber sealing ring is embedded therein; the outer diameter of the third intermediate tube is larger than the outer diameter of the fourth intermediate tube; an installation ring groove is provided at the connection between the outer walls of the third intermediate tube and the fourth intermediate tube and a second rubber sealing ring is embedded therein.

[0013] Furthermore, an adjusting tube is fixedly connected to the side wall of the control tube, and the adjusting tube is located below the limiting ring; an adjusting mechanism is installed on the adjusting tube.

[0014] Furthermore, the adjusting mechanism includes a fixed ring, the outer wall of which is fixedly connected to the inner wall of the adjusting tube; a rubber sleeve is fixedly connected inside the fixed ring, and a bent adjusting rod is fixedly connected inside the rubber sleeve, with one end of the bent adjusting rod located below the rubber sealing disc.

[0015] Furthermore, a water-passing circular groove is provided in the middle of the bottom of the rubber sealing disc.

[0016] This invention also claims a method for operating a pressure control and pressure relief integrated combination valve device for a domestic hot and cold water supply system, comprising the following steps: S1. Insert the guide strip of the inner tube mechanism into the guide groove, then rotate the middle tube and tighten it with the drain port. At this time, the inner tube mechanism moves down synchronously and presses against the rubber sealing plate, thus realizing the installation; then rotate the adjustment mechanism in the opposite direction to make the limit ring flow with water. S2. When the water inlet pipe is opened, the water pressure pushes open the frustum plug of the first pressure control valve, and water enters the water heater to replenish it; at this time, the second pressure control valve is in the closed state; when the internal pressure of the water heater is too high, the reverse action causes the first pressure control valve to close automatically, and the frustum plug of the second pressure control valve to open automatically to release pressure. S3. When cleaning and draining, actively increase the water pressure in the inlet pipe. The pressure will cause the first pressure control valve and the second pressure control valve to open automatically, so as to realize active flushing, regular cleaning and draining. During the depressurization process, continuously move the rubber sleeve to move the rubber sealing plate and the limit rod up and down. The reciprocating up and down displacement of the limit rod will prevent the upper end of the inner pipe mechanism from being blocked by large pieces of scale. S4. When the pressure relief valve needs to be disassembled, rotate the middle tube in the opposite direction. If it cannot be rotated, it means that the upper end of the inner tube mechanism and the upper end of the drain port are covered with scale. At this time, twist the middle tube back and forth to make the inner tube mechanism generate a reciprocating force of up and down displacement until the scale is broken. Finally, twist the middle tube in the opposite direction to complete the disassembly.

[0017] Compared with the prior art, the present invention has the following beneficial effects: (1) This invention, through the structural cooperation of the pressure relief valve, the first pressure control valve, and the second pressure control valve, not only enables pressure control and pressure relief to be carried out automatically in an integrated manner, but also allows for the periodic centralized cleaning of all scale residue inside the valve body and sewage discharge, preventing the valve body from being blocked and affecting equipment safety; specifically, when the water inlet pipe is opened, the water pressure pushes open the frustum plug of the first pressure control valve, and water enters the water heater to replenish water; at this time, since the water pressure has not yet triggered the pressure spring of the second pressure control valve, the second pressure control valve is in the closed state; when the pressure inside the water heater is too high, the reverse action causes the first pressure control valve to automatically... The system automatically closes and pushes open the truncated plug of the second pressure control valve to release pressure. This integrates pressure control and pressure release automatically. Simultaneously, during cleaning and sewage discharge, the water pressure in the inlet pipe is actively increased. This pressure causes the first and second pressure control valves to open automatically. Under the influence of clean water and pressure in the inlet pipe, the water entering the pipe first flushes the nearby first and second pressure control valves, achieving active flushing and periodic cleaning to prevent valve blockage and ensure equipment safety. At the same time, the pressure also carries away sewage and impurities from the water heater, resulting in better sewage discharge.

[0018] (2) This invention, through the cooperation of the intermediate pipe and the inner pipe mechanism, not only achieves integrated automatic pressure control and pressure relief, but also avoids the problem of scale buildup at the connection point during disassembly, making disassembly easy for manual workers. Specifically, during installation, the guide strip of the inner pipe mechanism is inserted into the guide groove, and then the intermediate pipe is rotated and tightened with the drain port. At this time, the thread pitch of the drain port and the thread ratio of the lower inner pipe can be set so that during the tightening of the intermediate pipe with the drain port, the inner pipe mechanism will move down synchronously and press against the rubber sealing plate, thereby achieving a sealed installation. Then, the adjustment mechanism is rotated in the opposite direction to allow water to flow through the limit ring, thus achieving the desired effect. Pressure control and pressure relief are integrated and automatic. When the inlet water pressure is actively increased, a valve blockage is found, requiring the pressure relief valve to be disassembled for maintenance. At this time, rotate the middle tube in the reverse direction. If it cannot be rotated, it means that the upper end of the inner tube mechanism and the upper end of the drain outlet are covered with scale. Then, twist the middle tube back and forth. Due to the guidance of the guide bar, the inner tube mechanism generates a reciprocating force of up and down displacement. This up and down reciprocating method avoids direct rigid unscrewing and can easily poke open the scale buildup. Finally, unscrew the middle tube in the reverse direction to complete the disassembly. This greatly facilitates disassembly, requires no professional tools, and can be easily operated by anyone, making maintenance convenient.

[0019] (3) The present invention, through the cooperation of the adjustment mechanism, the sealing plate, and the limiting rod, can avoid the blockage problem during sewage discharge, making pressure relief and sewage discharge more convenient. Through the structural design of the sealing plate and the limiting rod, the limiting rod is located inside the inner tube mechanism, preventing large scale from blocking the inner tube mechanism during sewage discharge. At the same time, during the sewage discharge process, due to the driving force of the water flow, scale impurities may block the upper end of the inner tube mechanism. At this time, by continuously moving the rubber sleeve during the pressure relief and sewage discharge process, one end of the bent adjustment rod moves up and down to move the rubber sealing plate and the limiting rod. Through the reciprocating up and down displacement of the limiting rod, the upper end of the limiting rod is continuously cleared of scale impurities, thereby preventing the upper end of the inner tube mechanism from being blocked by large scale, avoiding the blockage problem during sewage discharge, and making pressure relief and sewage discharge more convenient. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a combined valve device for pressure control and pressure relief in a household hot and cold water supply system according to the present invention. Figure 2 This is a schematic diagram of the cross-sectional structure of the first pressure control valve of the integrated pressure control and pressure relief combination valve device for a household hot and cold water supply system according to the present invention; Figure 3 This is a partial structural schematic diagram of a pressure control and pressure relief integrated combination valve device for a household hot and cold water supply system according to the present invention. Figure 4 This is a partial cross-sectional schematic diagram of a pressure control and pressure relief integrated combination valve device for a household hot and cold water supply system according to the present invention. Figure 5 This is a schematic diagram of the decentralized structure of a pressure control and pressure relief integrated combination valve device for a household hot and cold water supply system according to the present invention; Figure 6 This is a schematic diagram of the intermediate pipe structure of a pressure control and pressure relief integrated combination valve device for a household hot and cold water supply system according to the present invention; Figure 7 This is a schematic diagram of the internal pipe structure of a pressure control and pressure relief integrated combination valve device for a household hot and cold water supply system according to the present invention. Figure 8 This is a schematic diagram of the control pipe structure of a pressure control and pressure relief integrated combination valve device for a household hot and cold water supply system according to the present invention; Figure 9 This is a schematic diagram of the regulating mechanism of a combined valve device for pressure control and pressure relief in a household hot and cold water supply system according to the present invention. Figure 10 This is a schematic diagram of the limit rod structure of a pressure control and pressure relief integrated combination valve device for a household hot and cold water supply system according to the present invention; Figure 11This is a schematic diagram of the operation method of a pressure control and pressure relief integrated combination valve device for a household hot and cold water supply system according to the present invention.

[0021] The attached figures are labeled as follows: Control tube-100, limit ring-110, adjusting tube-120, intermediate tube-200, second intermediate tube-210, first intermediate tube-220, fourth intermediate tube-230, third intermediate tube-240, first pressure control valve-300, valve tube-310, abutment mesh ring-320, pressure spring-330, frustum plug-340, abutment groove-350, inner tube mechanism-400, inner tube body-410. Guide bar-420, limit rod-500, rubber sealing disc-510, water channel-511, water channel circular groove-520, adjusting mechanism-600, fixing ring-610, rubber sleeve-620, bending adjusting rod-630, first rubber sealing ring-710, second rubber sealing ring-720, second pressure control valve-800, main pipe body-900, drain port-910, guide groove-911, ball valve-920. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments. Of course, the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0023] Although the steps in this invention are arranged by reference numerals, this is not intended to limit the order of the steps. Unless the order of the steps is explicitly stated or the execution of a step requires other steps as a basis, the relative order of the steps can be adjusted. It is understood that the term "and / or" as used herein refers to and covers any and all possible combinations of one or more of the associated listed items.

[0024] Example

[0025] like Figures 1-11 As shown, a pressure control and pressure relief integrated combination valve device for a household hot and cold water supply system includes a pressure relief valve. The upper end of the pressure relief valve is threadedly connected to the drain port 910 on the side wall of the main pipe body 900. One end of the main pipe body 900 is fixedly connected to the inner tank of the water heater, and the other end of the main pipe body 900 is fixedly connected to a first pressure control valve 300. One end of the first pressure control valve 300 is fixedly connected to the inlet pipe through a ball valve 920. The lower end of the pressure relief valve is fixedly connected to a second pressure control valve 800, and the second pressure control valve 800 is fixedly connected to the drain pipe. The first pressure control valve 300 includes a valve tube 310, and an abutment ring 320 is fixedly connected to one end of the valve tube 310 near the main body 900. The abutment ring 320 is fixedly connected to a frustum plug 340 by a pressure spring 330. An abutment groove 350 is fixedly provided on the inner wall of the end of the valve tube 310 away from the main body 900, and the frustum plug 340 abuts against the abutment groove 350. The second pressure control valve 800 has the same structure as the first pressure control valve 300, and one end of the abutment groove 350 of the second pressure control valve 800 is close to the pressure relief valve.

[0026] This invention, through the structural cooperation of a pressure relief valve, a first pressure control valve 300, and a second pressure control valve 800, not only enables integrated and automatic pressure control and relief, but also allows for periodic and centralized cleaning of all scale residue inside the valve bodies and drainage, preventing valve blockage from affecting equipment safety. Specifically, when the water inlet pipe is opened, the water pressure pushes open the frustum plug 340 of the first pressure control valve 300, allowing water to enter the water heater. At this time, since the water pressure has not yet triggered the pressure spring 330 of the second pressure control valve 800, the second pressure control valve 800 is in the closed state. When the internal pressure of the water heater is too high, the reverse action causes the first pressure control valve 300 to close. The system automatically closes and automatically pushes open the frustum plug 340 of the second pressure control valve 800 to release pressure; thus, pressure control and pressure release are integrated and automatically performed. At the same time, during cleaning and sewage discharge, the water pressure in the inlet pipe is actively increased, causing the first pressure control valve 300 and the second pressure control valve 800 to open automatically. Under the action of clean water and pressure in the inlet pipe, the water entering the inlet pipe can first flush the nearby first pressure control valve 300 and second pressure control valve 800, achieving active flushing and periodic cleaning, avoiding valve blockage that could affect equipment safety. At the same time, the pressure can also carry out sewage impurities from the water heater simultaneously, resulting in better sewage discharge.

[0027] It is worth noting that when the water pressure in the inlet pipe is actively increased, such as by opening the ball valve 920 significantly, if the water heater pressure increases but no water comes out of the second pressure control valve 800, it indicates that the valve is blocked and requires subsequent disassembly and maintenance. At the same time, the specifications of the pressure springs 330 of the first pressure control valve 300 and the second pressure control valve 800 can be selected according to the usual method and will not be described in detail here.

[0028] Furthermore, the pressure relief valve includes an intermediate pipe 200, the upper end of which is threadedly connected to the drain port 910 on the side wall of the main pipe body 900; the lower end of the intermediate pipe 200 is threadedly connected to the upper end of the control pipe 100; a limiting ring 110 is fixedly provided in the middle of the inside of the control pipe 100, the upper end of the limiting ring 110 abuts against a rubber sealing disc 510, and a limiting rod 500 is fixedly connected to the top middle of the rubber sealing disc 510; The drain outlet 910 is internally slidably connected to an inner tube mechanism 400, the lower end of which abuts against the top of a rubber sealing disc 510; the bottom of the rubber sealing disc 510 is provided with water passage grooves 511 evenly distributed around its circumference.

[0029] This invention, through the cooperation of the intermediate tube 200 and the inner tube mechanism 400, not only enables the automatic integration of pressure control and pressure relief, but also avoids the problem of scale buildup at the connection point during disassembly, making disassembly easy for manual workers; a detailed description will follow.

[0030] Furthermore, the intermediate pipe 200 includes a first intermediate pipe 220, a second intermediate pipe 210, a third intermediate pipe 240, and a fourth intermediate pipe 230 that are fixedly connected to each other; the inner wall thread of the first intermediate pipe 220 is threadedly connected to the drain outlet 910; the outer wall thread of the fourth intermediate pipe 230 is threadedly connected to the upper end of the control pipe 100.

[0031] Furthermore, the inner tube mechanism 400 includes an inner tube body 410; the upper outer wall of the inner tube body 410 is symmetrically provided with guide strips 420, and the inner side wall of the drain outlet 910 is symmetrically provided with guide grooves 911, the guide grooves 911 being slidably connected to the guide strips 420; the lower outer wall of the inner tube body 410 is provided with a thread and is threadedly connected to the inner wall thread of the fourth intermediate tube 230.

[0032] During installation, the guide strip 420 of the inner tube mechanism 400 is inserted into the guide groove 911, and then the intermediate tube 200 is rotated and tightened with the drain port 910. At this time, the thread pitch of the drain port 910 can be set proportionally to the thread of the lower inner tube 410, so that during the tightening process of the intermediate tube 200 with the drain port 910, the inner tube mechanism 400 will simultaneously move downwards and press against the rubber sealing disc 510, thereby achieving a sealed installation. Then, the adjusting mechanism 600 is rotated in the opposite direction to allow water to flow through the limiting ring 110, thus achieving integrated automatic pressure control and pressure relief. When the water pressure in the inlet pipe is actively increased, a valve blockage is detected. To remove the pressure relief valve for maintenance, rotate the intermediate tube 200 in the reverse direction. If it cannot be rotated, it means that the upper end of the inner tube mechanism 400 and the upper end of the drain port 910 are covered with scale. Then, twist the intermediate tube 200 back and forth. Due to the guidance of the guide bar 420, the inner tube mechanism 400 will generate a reciprocating force of up and down displacement. This up and down reciprocating method avoids direct rigid unscrewing and can easily poke open the scale buildup. Finally, unscrew the intermediate tube 200 in the reverse direction to complete the disassembly. This greatly facilitates disassembly, requires no professional tools, and can be easily operated by anyone, making maintenance convenient.

[0033] Furthermore, when the intermediate tube 200 is rotated and tightened with the drain outlet 910, the inner tube mechanism 400 moves downward; when the intermediate tube 200 is rotated and unscrewed with the drain outlet 910, the inner tube mechanism 400 moves upward.

[0034] It is worth noting that the vertical displacement range of the inner tube mechanism 400 can be increased by setting the ratio of the outer wall thread of the drain outlet 910 to the lower end thread of the inner tube 410, which facilitates adjustment. This will not be described in detail here.

[0035] Furthermore, the inner wall of the second intermediate tube 210 is fitted to the inner tube body 410, and an installation ring groove is provided in the middle of the inner wall of the second intermediate tube 210 and a first rubber sealing ring 710 is embedded therein; the outer diameter of the third intermediate tube 240 is larger than the outer diameter of the fourth intermediate tube 230; an installation ring groove is provided at the connection between the outer walls of the third intermediate tube 240 and the fourth intermediate tube 230 and a second rubber sealing ring 720 is embedded therein.

[0036] The sealing performance of the connection is improved by using the first rubber sealing ring 710 and the second rubber sealing ring 720.

[0037] Furthermore, the side wall of the control tube 100 is fixedly connected to an adjusting tube 120, which is located below the limiting ring 110; an adjusting mechanism 600 is installed on the adjusting tube 120.

[0038] The present invention, through the cooperation of the adjusting mechanism 600, the sealing disc 510, and the limiting rod 500, can avoid the problem of blockage during sewage discharge, and comprehensively makes pressure relief and sewage discharge more convenient; a detailed description will follow.

[0039] Furthermore, the adjustment mechanism 600 includes a fixing ring 610, the outer wall of which is fixedly connected to the inner wall of the adjustment tube 120; a rubber sleeve 620 is fixedly connected inside the fixing ring 610, and a bending adjustment rod 630 is fixedly connected inside the rubber sleeve 620, one end of which is located below the rubber sealing disc 510.

[0040] This invention, through the structural design of the sealing disc 510 and the limiting rod 500, positions the limiting rod 500 inside the inner tube mechanism 400, preventing large pieces of scale from clogging the inner tube mechanism 400 during sewage discharge. Simultaneously, during sewage discharge, the flow of water may cause scale and impurities to accumulate at the upper end of the inner tube mechanism 400, causing blockage. At this time, by continuously moving the rubber sleeve 620 during pressure relief and sewage discharge, one end of the bent adjusting rod 630 moves up and down, shifting the rubber sealing disc 510 and the limiting rod 500. This reciprocating up-and-down movement of the limiting rod 500 continuously clears away scale and impurities at its upper end, thus preventing large pieces of scale from clogging the upper end of the inner tube mechanism 400 and avoiding blockage problems during sewage discharge. Overall, this makes pressure relief and sewage discharge more convenient.

[0041] Furthermore, a water-passing groove 520 is provided in the center of the bottom of the rubber sealing disc 510. The water-passing groove 520 further improves the sewage discharge speed.

[0042] A method for operating the aforementioned integrated pressure control and pressure relief valve device for a domestic hot and cold water supply system includes the following steps: S1. Insert the guide strip 420 of the inner tube mechanism 400 into the guide groove 911, then rotate the intermediate tube 200 and tighten it with the drain port 910. At this time, the inner tube mechanism 400 moves down synchronously and presses against the rubber sealing plate 510, thereby realizing the installation; then rotate the adjusting mechanism 600 in the opposite direction to make the limit ring 110 pass through water. S2. When the water inlet pipe is opened, the water pressure pushes open the frustum plug 340 of the first pressure control valve 300, and water enters the water heater to replenish it; at this time, the second pressure control valve 800 is in the closed state; when the internal pressure of the water heater is too high, the reverse action causes the first pressure control valve 300 to close automatically, and the frustum plug 340 of the second pressure control valve 800 to open automatically to release pressure; S3. When cleaning and draining, the water pressure in the inlet pipe is actively increased. The pressure causes the first pressure control valve 300 and the second pressure control valve 800 to open automatically, realizing active flushing, periodic cleaning and draining. During the depressurization process, the rubber sleeve 620 is continuously moved, causing one end of the bent adjusting rod 630 to move up and down the rubber sealing disc 510 and the limiting rod 500. The reciprocating up and down displacement of the limiting rod 500 prevents the upper end of the inner pipe mechanism 400 from being blocked by large pieces of scale. S4. When the pressure relief valve needs to be disassembled, rotate the intermediate tube 200 in the reverse direction. If it cannot be rotated, it means that the upper end of the inner tube mechanism 400 and the upper end of the drain port 910 are covered with scale. At this time, twist the intermediate tube 200 back and forth to make the inner tube mechanism 400 generate a reciprocating force of up and down displacement until the scale is broken. Finally, twist the intermediate tube 200 in the reverse direction to complete the disassembly.

[0043] It is worth noting that the regulating tube 120 of the present invention not only has the function of regulation, but also serves as a handle for convenient rotation operation.

[0044] The above description is only a preferred embodiment of the present invention. It should be noted that those skilled in the art can make several improvements and modifications without departing from the inventive concept of the present invention, and these all fall within the protection scope of the present invention.

Claims

1. A combined pressure control and pressure relief valve device for a household hot and cold water supply system, characterized in that, The system includes a pressure relief valve, the upper end of which is threadedly connected to the drain port (910) on the side wall of the main pipe body (900); one end of the main pipe body (900) is fixedly connected to the inner tank of the water heater, and the other end of the main pipe body (900) is fixedly connected to a first pressure control valve (300); one end of the first pressure control valve (300) is fixedly connected to the inlet pipe through a ball valve (920); the lower end of the pressure relief valve is fixedly connected to a second pressure control valve (800), and the second pressure control valve (800) is fixedly connected to the drain pipe. The first pressure control valve (300) includes a valve tube (310), and an abutment mesh ring (320) is fixedly connected to one end of the valve tube (310) near the main body (900). The abutment mesh ring (320) is fixedly connected to a frustum plug (340) by a pressure spring (330). An abutment groove (350) is fixedly provided on the inner wall of the valve tube (310) away from the main body (900), and the frustum plug (340) abuts against the abutment groove (350). The second pressure control valve (800) has the same structure as the first pressure control valve (300), and one end of the abutment groove (350) of the second pressure control valve (800) is close to the pressure relief valve.

2. The integrated pressure control and pressure relief valve device for a household hot and cold water supply system according to claim 1, characterized in that, The pressure relief valve includes an intermediate pipe (200), the upper end of which is threaded to a drain port (910) on the side wall of the main pipe (900); the lower end of the intermediate pipe (200) is threaded to the upper end of the control pipe (100); a limiting ring (110) is fixedly provided in the middle of the inside of the control pipe (100), the upper end of the limiting ring (110) abuts against a rubber sealing disc (510), and a limiting rod (500) is fixedly connected to the top middle of the rubber sealing disc (510); The drain outlet (910) is internally slidably connected to an inner tube mechanism (400), the lower end of which abuts against the top of a rubber sealing disc (510); the bottom of the rubber sealing disc (510) is provided with water passage grooves (511) evenly distributed around it.

3. The integrated pressure control and pressure relief valve device for a household hot and cold water supply system according to claim 2, characterized in that, The intermediate pipe (200) includes a first intermediate pipe (220), a second intermediate pipe (210), a third intermediate pipe (240), and a fourth intermediate pipe (230) that are fixedly connected to each other; the inner wall thread of the first intermediate pipe (220) is threadedly connected to the drain outlet (910); the outer wall thread of the fourth intermediate pipe (230) is threadedly connected to the upper end of the control pipe (100).

4. The integrated pressure control and pressure relief valve device for a household hot and cold water supply system according to claim 3, characterized in that, The inner tube mechanism (400) includes an inner tube body (410); the upper outer wall of the inner tube body (410) is symmetrically provided with guide strips (420), and the inner side wall of the drain outlet (910) is symmetrically provided with guide grooves (911), the guide grooves (911) and the guide strips (420) are slidably connected; the lower outer wall of the inner tube body (410) is provided with a thread and is threadedly connected to the inner wall thread of the fourth intermediate tube (230).

5. The integrated pressure control and pressure relief valve device for a household hot and cold water supply system according to claim 4, characterized in that, When the intermediate tube (200) is rotated and tightened with the drain port (910), the inner tube mechanism (400) moves downward; when the intermediate tube (200) is rotated and unscrewed with the drain port (910), the inner tube mechanism (400) moves upward.

6. The integrated pressure control and pressure relief valve device for a household hot and cold water supply system according to claim 4, characterized in that, The inner wall of the second intermediate tube (210) is fitted to the inner tube body (410), and an installation ring groove is provided in the middle of the inner wall of the second intermediate tube (210) and a first rubber sealing ring (710) is embedded therein; the outer diameter of the third intermediate tube (240) is larger than the outer diameter of the fourth intermediate tube (230); an installation ring groove is provided at the connection between the outer walls of the third intermediate tube (240) and the fourth intermediate tube (230) and a second rubber sealing ring (720) is embedded therein.

7. The integrated pressure control and pressure relief valve device for a household hot and cold water supply system according to claim 2, characterized in that, The control tube (100) has a fixed connection to an adjustment tube (120) on its side wall. The adjustment tube (120) is located below the limiting ring (110). An adjustment mechanism (600) is installed on the adjustment tube (120).

8. The integrated pressure control and pressure relief valve device for a household hot and cold water supply system according to claim 7, characterized in that, The adjusting mechanism (600) includes a fixing ring (610), the outer wall of which is fixedly connected to the inner wall of the adjusting tube (120); a rubber sleeve (620) is fixedly connected inside the fixing ring (610), and a bent adjusting rod (630) is fixedly connected inside the rubber sleeve (620), one end of which is located below the rubber sealing disc (510).

9. The integrated pressure control and pressure relief valve device for a household hot and cold water supply system according to claim 2, characterized in that, A water-passing circular groove (520) is provided in the middle of the bottom of the rubber sealing disc (510).

10. A method for operating a pressure control and pressure relief integrated combination valve device for a domestic hot and cold water supply system as described in any one of claims 1 to 9, characterized in that, Includes the following steps: S1. Insert the guide strip (420) of the inner tube mechanism (400) into the guide groove (911), then rotate the intermediate tube (200) and tighten it with the drain port (910). At this time, the inner tube mechanism (400) moves down synchronously and presses against the rubber sealing plate (510) to achieve installation. Then rotate the adjusting mechanism (600) in the opposite direction to make the limiting ring (110) pass through water. S2. When the water inlet pipe is opened, the water pressure pushes open the frustum plug (340) of the first pressure control valve (300), and water enters the water heater to replenish it. At this time, the second pressure control valve (800) is closed. When the internal pressure of the water heater is too high, the reverse action causes the first pressure control valve (300) to close automatically and the frustum plug (340) of the second pressure control valve (800) to open automatically to release pressure. S3. When cleaning and draining, actively increase the water pressure in the inlet pipe. The pressure causes the first pressure control valve (300) to open automatically and the second pressure control valve (800) to open automatically, realizing active flushing, regular cleaning and draining. During the depressurization process, continuously move the rubber sleeve (620) to make one end of the bent adjustment rod (630) move up and down the rubber sealing disc (510) and the limit rod (500). Through the reciprocating up and down displacement of the limit rod (500), the upper end of the inner pipe mechanism (400) is prevented from being blocked by large pieces of scale. S4. When the pressure relief valve needs to be disassembled, rotate the intermediate tube (200) in the reverse direction. If it cannot be rotated, it means that the upper end of the inner tube mechanism (400) and the upper end of the drain port (910) are covered with scale. At this time, twist the intermediate tube (200) back and forth to make the inner tube mechanism (400) generate a reciprocating force of up and down displacement until the scale is broken. Finally, twist the intermediate tube (200) in the reverse direction to complete the disassembly.

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