An adjustable multi-stage pipeline water-saving valve and its use method

Abstract

The present application provides an adjustable multi-stage water-saving valve for pipelines and a method for using the same, which belongs to the field of valve technology, and includes a shell formed by front and rear covers buckled together, the shell including a flow channel that runs through the shell along the length direction, and also including a "T"-shaped limit groove on both sides of the upper and lower sides of the internal flow channel of the shell, and a valve core is arranged in the flow channel of the shell, and the valve core is in the shape of an "I". In the above scheme, by arranging the valve core, the limit pipe, the outlet pipe 1, the sleeve and the outlet pipe 2, the opening of the valve core is positively correlated with the rotation angle of the outlet pipe 1, and when in a small flow state, water is only discharged through the outlet pipe 2. Since the diameter of the outlet pipe 2 is smaller than the limit pipe, the water flow in the outlet pipe 2 flowing to the filter screen has a higher flow rate, and the water flow generated by the dispersion effect of the filter screen makes this part of the water flow have a good flushing effect, which can achieve a good cleaning effect in actual use, thereby saving the amount of water used for flushing and achieving a water-saving effect.

Description

Technical Field

[0001] The present application relates to the technical field of valves, and particularly relates to an adjustable multi-stage pipeline water-saving valve and its usage method. Background Art

[0002] A water supply project includes water conveyance pipelines, distribution pipe networks, pumping stations, water towers and other auxiliary facilities. To ensure the normal operation of the water supply pipe network, numerous pipelines are used to connect these auxiliary facilities. Considering the operation and maintenance management of multi-stage pipelines, valves are installed in the multi-stage pipelines;

[0003] A water-saving valve in the prior art, with the publication number CN114263758B, rotates the universal ball 701 to adjust the suitable water outlet angle, and can also adjust the water flow shape at the outlet by rotating the water flow regulator 704 in the adjustable water-saving device, so that the same volume of water can play the same role as more water, thereby achieving the purpose of saving water;

[0004] However, when this device is in use, when the opening degree of the spherical valve body relative to the valve seat body is small, the overall flow rate of the valve is small and the flow velocity is slow. At this time, the water flow regulation effect of the water flow regulator is poor, and it is difficult to meet the requirements of flushing and rinsing, and the water-saving effect needs to be improved. Summary of the Invention

[0005] In view of this, the purpose of the present application is to provide an adjustable multi-stage pipeline water-saving valve and its usage method to improve the water outlet effect of the valve under low flow conditions and enhance the water-saving ability.

[0006] To solve the above technical problems, the present application provides the following technical solutions:

[0007] An adjustable multi-stage pipeline water-saving valve includes a housing formed by front and rear covers buckling together. The housing includes a flow channel that penetrates through from front to back along the length direction. It also includes "T"-shaped limiting grooves opened on both the upper and lower sides of the internal flow channel of the housing. A valve core is arranged in the flow channel of the housing. The valve core is in the shape of a "worker". The horizontal part of the valve core is arranged in the limiting groove of the housing. An outlet pipe one is arranged in the opening on the water outlet side of the housing. A sleeve is arranged inside the outlet pipe one. An outlet pipe two is inserted through the sleeve. The end of the outlet pipe two is connected with a limiting pipe, and the limiting pipe is clamped in the groove on the side wall of the valve core;

[0008] A gear ring one is sleeved outside the limiting pipe, and a gear ring two is arranged outside the valve core. The gear ring one and the gear ring two have a transmission relationship;

[0009] A filter screen is arranged in the opening on the water outlet side of the outlet pipe one. Annularly distributed water outlet openings are opened on the outer peripheral surface of the sleeve, and annularly distributed water outlet openings are opened on the outer peripheral surface of the outlet pipe two;

[0010] A valve rod penetrates through the top of the housing, and one end of the valve rod penetrating through the top of the housing is embedded in the top of the valve core.

[0011] Preferably, the valve core includes limiting portions at both ends thereof having a cylindrical structure, and the limiting portions are embedded in the horizontal portions of the limiting grooves of the housing.

[0012] Preferably, a through hole perpendicular to the central axis is provided in the middle of the valve core, and a "cross"-shaped drainage plate is arranged in the through hole in the middle of the valve core;

[0013] The diameter of the through hole in the middle of the valve core is the same as the inner diameter of the limiting pipe, and the limiting pipe abuts against the side wall of the valve core;

[0014] A positioning ring is sleeved on the middle of the valve core, and the positioning ring is arranged on the top of the first gear ring.

[0015] Preferably, a sliding groove is provided at the top of the valve core, the sliding groove is arranged along the direction of the flow channel of the housing, and the valve rod is clamped in the sliding groove at the top of the valve core.

[0016] Preferably, a water outlet hole is provided at the end of the limiting pipe, a groove is provided at the edge of the end of the limiting pipe, and a first sealing ring is clamped inside the groove;

[0017] A water outlet hole identical to the limiting pipe is provided at the end of the first water outlet pipe, and the first water outlet pipe is arranged in a manner of fitting against the end of the limiting pipe.

[0018] Preferably, a partition strip is arranged inside the filter screen, the partition strip is annular, the size of the partition strip is the same as the size of the sleeve, and the partition strip is arranged in a manner of fitting against the opening of the sleeve.

[0019] Preferably, a thread is provided on the outer side wall of the first water outlet pipe, and the first water outlet pipe is fastened to the housing by means of the thread.

[0020] Preferably, a limiting joint is connected to the water inlet side of the housing, the limiting joint is clamped in the side wall groove of the valve core, and an O-ring is arranged on the side of the limiting joint facing the valve core.

[0021] Preferably, a sleeve is arranged at the center of the top of the housing, the sleeve is sleeved on the outer side of the valve rod, a groove is provided on the top surface of the sleeve, a positioning plate is embedded inside the groove, and positioning holes are provided on the surface of the positioning plate;

[0022] A positioning rod penetrates through the side wall of the valve rod, and a spring is arranged between the positioning rod and the valve rod.

[0023] On the other hand, the present application provides a usage method of an adjustable multi-stage pipeline water-saving valve:

[0024] S1: After assembling the whole device, install the housing in the pipeline. Drive the valve core to rotate by turning the valve stem to cut off or supply water flow.

[0025] S2: During the rotation of the valve core, the second gear ring drives the first gear ring to rotate, and the limiting pipe drives the second outlet pipe to rotate. The water flow in the limiting pipe enters the interior of the first outlet pipe, increases the flow velocity and then sprays out.

[0026] S3: As the opening angle of the valve core increases, the through holes on the outer side wall of the second outlet pipe coincide with the through holes on the outer side wall of the sleeve, enabling the water flow to enter the interior of the first outlet pipe. When the water flow passes through the first outlet pipe, it sprays out with a reduced flow velocity, achieving a water-saving effect.

[0027] S4: The water flow sprayed out through the first outlet pipe is dispersed by the filter screen, enriching the bubbles in the water flow and improving the cleaning ability of the water flow, achieving a water-saving effect.

[0028] Compared with the prior art, the present application has at least the following beneficial effects:

[0029] In the above solution, by setting the valve core, the limiting pipe, the first outlet pipe, the sleeve and the second outlet pipe, the opening degree of the valve core is positively correlated with the rotation angle of the first outlet pipe. When in the small flow state, water is discharged only through the second outlet pipe. Since the diameter of the second outlet pipe is smaller than that of the limiting pipe, the water flow flowing into the filter screen in the second outlet pipe has a relatively high flow velocity. The water flow generated by the dispersion of the filter screen makes this part of the water flow have a good scouring effect, and a good cleaning effect can be achieved during actual use, thus saving the water consumption for flushing and achieving the water-saving effect.

[0030] In the above solution, by setting the limiting pipe, the first outlet pipe and the valve core, the limiting pipe restricts the space for the valve core to move along the axial direction, has a good limiting effect, can keep the position of the valve core stable, and reduce the sealing failure caused by wear.

[0031] In the above solution, by setting the first outlet pipe and the housing, the first outlet pipe and the housing are connected by threads. Under the action of the pre-tightening force of the threads, the first outlet pipe can press the limiting pipe, further squeezing the valve core, and at the same time limiting the movement space of the valve core, reducing the situation of poor sealing caused by the shaking of the valve core.

[0032] In the above solution, by setting the limiting joint and the housing, the limiting joint is designed on the opposite side of the limiting pipe. The limiting joint also has a limiting effect on the valve core. When the valve core is closed to achieve the water cut-off effect, the limiting joint fits on the outer peripheral surface of the valve core to achieve the sealing effect. Combined with the floating design between the valve core and the valve stem, under the action of the extrusion force of the limiting pipe, the valve core moves in the opposite direction of the medium pressure, so that the valve core and the limiting joint are closely fitted, and a better sealing effect can be achieved under the action of pressure. Brief Description of the Drawings

[0033] The accompanying drawings incorporated herein and constituting a part of the specification illustrate embodiments of the present disclosure, and together with the specification are further used to explain the principles of the present disclosure and enable those skilled in the relevant art to implement and use the present disclosure.

[0034] Figure 1 It is a schematic diagram of the overall structure in this application;

[0035] Figure 2 It is a schematic diagram of the overall sectional structure in this application;

[0036] Figure 3 It is a schematic diagram of the valve core structure in this application;

[0037] Figure 4 It is a schematic diagram of the limiting part structure in this application;

[0038] Figure 5 It is a schematic diagram of the structure of the first water outlet pipe in this application

[0039] Figure 6 It is a schematic diagram of the structure of the limiting pipe in this application

[0040] Figure 7 It is a schematic diagram of the valve stem structure in this application

[0041] Figure 8 This is the application Figure 2 The enlarged structure schematic diagram at position A in

[0042] [Reference numerals]

[0043] 1. Housing; 101. Valve stem; 102. Sleeve; 103. Positioning plate; 104. Positioning rod; 105. Spring; 2. Valve core; 201. Second gear ring; 202. Limiting part; 203. Drainage plate; 204. Positioning ring; 3. First water outlet pipe; 4. Sleeve; 5. Second water outlet pipe; 6. Limiting pipe; 601. First gear ring; 602. First sealing ring; 7. Filter screen; 701. Partition strip; 8. Limiting joint. Detailed implementation manners

[0044] The following describes in detail an adjustable multi-stage pipeline water-saving valve and its usage method provided by this application in conjunction with the accompanying drawings and specific embodiments. At the same time, it should be noted here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and for some well-known technologies, those skilled in the art can also adopt other alternative methods for implementation; moreover, the accompanying drawings are only for more specifically describing the embodiments and are not intended to specifically limit this application.

[0045] Such as Figure 1 、 Figure 2 、 Figure 3 And Figure 4An adjustable multi-stage pipeline water-saving valve provided by an embodiment of the present application includes a housing 1 formed by front and rear covers buckling, the housing 1 includes a flow channel that penetrates through the front and rear in the length direction, and further includes "T"-shaped limiting grooves opened on both the upper and lower sides of the internal flow channel of the housing 1. A valve core 2 is arranged in the flow channel of the housing 1. The valve core 2 is in the shape of a "work" character. The horizontal part of the valve core 2 is arranged in the limiting groove of the housing 1. A first outlet pipe 3 is arranged in the water outlet side opening of the housing 1. A sleeve 4 is arranged inside the first outlet pipe 3. A second outlet pipe 5 is penetrated inside the sleeve 4. A limiting pipe 6 is connected to the end of the second outlet pipe 5. The limiting pipe 6 is clamped in the side wall groove of the valve core 2;

[0046] A first gear ring 601 is sleeved outside the limiting pipe 6. A second gear ring 201 is arranged outside the valve core 2. A transmission relationship is established between the first gear ring 601 and the second gear ring 201;

[0047] A filter screen 7 is arranged in the water outlet side opening of the first outlet pipe 3. Annularly distributed water outlet openings are opened on the outer peripheral surface of the sleeve 4. Annularly distributed water outlet openings are opened on the outer peripheral surface of the second outlet pipe 5;

[0048] A valve rod 101 penetrates through the top of the housing 1. One end of the valve rod 101 penetrating through the top of the housing 1 is embedded in the top of the valve core 2;

[0049] The housing 1 is assembled in a water supply pipeline. The opening degree of the valve core 2 in the flow channel of the housing 1 is adjusted through the valve rod 101, and the flow rate on the water outlet side of the flow channel of the housing 1 is adjusted. The opening degree of the valve core 2 is proportional to the rotation angle of the valve rod 101. The valve core 2 is of a cylindrical structure and can rotate smoothly inside the housing 1. At the same time, the valve core 2 is limited by the limiting groove of the housing 1, and the up and down movement space of the valve core 2 is limited, so as to ensure the accuracy of the position of the valve core 2 relative to the housing 1 and reduce the water flow resistance;

[0050] During the rotation and opening process of the valve core 2, the water output increases from small to large. When in the small flow state, the water flow inside the valve core 2 flows through the limiting pipe 6 and enters the second outlet pipe 5. Since the diameter of the limiting pipe 6 is larger than that of the second outlet pipe 5, according to the principle of fluid mechanics, when the pipe diameter increases, the flow rate will decrease; when the pipe diameter decreases, the flow rate will increase. Thus, the water flow flowing into the filter screen 7 inside the second outlet pipe 5 has a higher flow rate. Therefore, in the small flow state, the water flow generated by the dispersion effect of the filter screen 7 makes this part of the water flow have a good scouring effect, and a good cleaning effect can be achieved during actual use, thereby saving the water consumption for flushing and achieving the effect of water saving;

[0051] The valve core 2 drives the second gear ring 201 to rotate, drives the first gear ring 601 to rotate, so that the limiting pipe 6 drives the second outlet pipe 5 to rotate until the through holes on the outer side wall of the second outlet pipe 5 coincide with the through holes on the outer side wall of the sleeve 4, so that the first outlet pipe 3 and the second outlet pipe 5 discharge water simultaneously to realize water use in the large flow state.

[0052] The filter screen 7 installed at the end of the first outlet pipe 3 has the effect of dispersing the water flow, can form distributed water discharge, and has a good scouring effect under the large flow rate condition.

[0053] In this embodiment, as Figures 2 - 4 shown, the valve core 2 includes the limiting parts 202 with a cylindrical structure at both ends thereof, and the limiting parts 202 are embedded in the horizontal part of the limiting groove of the housing 1;

[0054] The limiting parts 202 at both ends of the valve core 2 include an arc-shaped outer peripheral surface, which has good limiting and guiding effects. The cooperation between the limiting parts 202 and the limiting groove of the housing 1 enables the valve core 2 to have stable rotation performance, is not easy to loosen, is not easy to be misaligned, and has strong compressive performance;

[0055] The limiting part 202 has an end surface with a flat straight surface. The end surface of the limiting part 202 further restricts the movement space of the valve core 2 in the axial direction, has good limiting effect. The limiting part 202 and the housing 1 are in sliding fit, the structure is compact and stable, the effect of opening and closing the water flow is good and the sealing effect is good.

[0056] As Figures 2 - 4 shown, a through hole perpendicular to the central axis is opened in the middle of the valve core 2, and a "cross"-shaped drainage plate 203 is arranged in the through hole in the middle of the valve core 2;

[0057] The diameter of the through hole in the middle of the valve core 2 is the same as the inner diameter of the limiting pipe 6, and the limiting pipe 6 abuts against the side wall of the valve core 2;

[0058] A positioning ring 204 is sleeved in the middle of the valve core 2, and the positioning ring 204 is arranged at the top of the first gear ring 601;

[0059] The drainage plate 203 inside the valve core 2 has the effect of dispersing the water flow and can guide the water flow so that the water flow flows to the limiting pipe 6 and the second outlet pipe 5 to ensure the water discharge effect;

[0060] When the opening degree of the valve core 2 reaches the opening limit, the water flow can smoothly spray out from the valve core 2 into the limiting pipe 6 to make the water flow flow stably;

[0061] The positioning ring 204 is in sliding fit with the top of the first gear ring 601, so that the limiting pipe 6 can play a role in limiting the valve core 2, limit the movement space of the valve core 2, and keep the position of the valve core 2 stable.

[0062] As Figures 2 - 4 shown, a chute is opened at the top of the valve core 2, and the chute is arranged along the flow channel direction of the housing 1, and the valve rod 101 is clamped in the chute at the top of the valve core 2;

[0063] The valve core 2 can be assembled in a floating manner. The valve core 2 can move towards the outlet direction under the action of the medium pressure in the flow channel, so as to achieve a tight fit between the valve core 2 and the housing 1, and a better sealing effect can be achieved under the action of pressure.

[0064] As Figure 5 shown in Figure 6 Figure, a water outlet hole is provided at the end of the limit pipe 6, a groove is formed at the edge of the end of the limit pipe 6, and a first sealing ring 602 is clamped inside the groove;

[0065] The end of the first water outlet pipe 3 is provided with a water outlet hole identical to that of the limit pipe 6, and the first water outlet pipe 3 is arranged in a manner that fits the end of the limit pipe 6;

[0066] As the opening degree of the valve core 2 increases, the outer peripheral surface of the second water outlet pipe 5 coincides with the through hole on the outer peripheral surface of the sleeve 4 to meet the water outlet demand under the large flow rate state. For this water use demand, through holes communicating with each other are designed at the end of the limit pipe 6 and the end of the first water outlet pipe 3, and the opening degree of this through hole is positively correlated with the opening degree of the valve core 2, which can meet the high flow rate state;

[0067] The first water outlet pipe 3 is clamped in the step groove between the second water outlet pipe 5 and the limit pipe 6. At the same time, the first water outlet pipe 3 is connected to the housing 1, and the position between the first water outlet pipe 3 and the second water outlet pipe 5 is stable and accurate, and the overall structure is compact.

[0068] As Figure 2 shown in Figure 5 Figure, a partition strip 701 is arranged inside the filter screen 7. The partition strip 701 is annular, and the size of the partition strip 701 is the same as that of the sleeve 4. The partition strip 701 is arranged to fit the opening of the sleeve 4; Figure 6 When the opening degree of the valve core 2 is not sufficient to make the first water outlet pipe 3 discharge water, only the second water outlet pipe 5 discharges water. When the medium sprayed out by the second water outlet pipe 5 passes through the filter screen 7, it is restricted by the partition strip 701, reducing the radial flow of the medium along the filter screen 7, enabling the medium to pass through the filter screen 7 stably, and ensuring the water outlet effect.

[0069]

[0070] As shown in Figure 5 Figure, a thread is provided on the outer side wall of the first water outlet pipe 3, and the first water outlet pipe 3 is fastened to the housing 1 through the thread; Figure 6

[0071] The first water outlet pipe 3 and the housing 1 are connected through a thread. Under the action of the pre-tightening force of the thread, the first water outlet pipe 3 can press the limit pipe 6, enabling the limit pipe 6 to further press the valve core 2, so that the first gear ring 601 and the second gear ring 201 maintain a stable meshing state, and at the same time limiting the movement space of the valve core 2, reducing the situation of poor sealing caused by the shaking of the valve core 2;

[0072] ​Moreover, since the valve core 2 and the valve rod 101 are designed to be floating, under the extrusion force of the limiting tube 6, it can resist the pressure of the medium on the valve core 2, causing the valve core 2 to move in the direction opposite to the medium pressure, so as to achieve a tight fit between the valve core 2 and the housing 1, and a better sealing effect can be achieved under the action of pressure.

[0073] As Figure 2 shown, a limiting joint 8 is connected to the water inlet side of the housing 1. The limiting joint 8 is clamped in the side wall groove of the valve core 2, and an O-ring is arranged on the side of the limiting joint 8 facing the valve core 2;

[0074] The limiting joint 8 is designed on the side opposite to the limiting tube 6. The limiting joint 8 also has a limiting effect on the valve core 2. When the valve core 2 is closed to achieve the flow cut-off effect, the limiting joint 8 fits on the outer peripheral surface of the valve core 2 to achieve the sealing effect;

[0075] Combined with the floating design between the valve core 2 and the valve rod 101, under the extrusion force of the limiting tube 6, the valve core 2 moves in the direction opposite to the medium pressure, so as to achieve a tight fit between the valve core 2 and the limiting joint 8, and a better sealing effect can be achieved under the action of pressure;

[0076] An O-ring is arranged at the position of the limiting joint 8 to improve the sealing effect, reduce the wear between the valve core 2 and the limiting joint 8 at the same time. At the same time, the limiting joint 8 can adopt a three-way or four-way joint to meet the connection requirements of multi-stage pipelines.

[0077] As Figure 2 、 Figure 7 and Figure 8 shown, a sleeve 102 is arranged at the center of the top of the housing 1. The sleeve 102 is sleeved on the outside of the valve rod 101. A groove is opened on the top surface of the sleeve 102, and a positioning plate 103 is embedded in the groove. Positioning holes are opened on the surface of the positioning plate 103;

[0078] A positioning rod 104 penetrates through the side wall of the valve rod 101, and a spring 105 is arranged between the positioning rod 104 and the valve rod 101;

[0079] When the valve rod 101 rotates, it drives the positioning rod 104 to move. The positioning rod 104 moves in the end groove of the sleeve 102 to limit the opening angle of the valve rod 101;

[0080] The positioning rod 104 is embedded in the positioning hole on the surface of the positioning plate 103 under the extrusion of the spring 105. The end of the positioning rod 104 is hemispherical, so there is no need to deliberately control the position of the positioning rod 104;

[0081] Multiple positioning holes are designed on the surface of the positioning plate 103. As the positioning rod 104 moves, it moves through different positioning holes one by one, making the valve rod 101 have an obvious sense of damping during the rotation process, so as to remind the user of the opening angle and maintain the habit of saving water.

[0082] Furthermore, the usage method of a water-saving valve for an adjustable multi-stage pipeline is as follows:

[0083] S1: After assembling the whole device, install the housing 1 in the pipeline. Rotate the valve stem 101 to drive the valve core 2 to rotate, and turn the water flow on and off;

[0084] S2: During the rotation of the valve core 2, the second gear ring 201 drives the first gear ring 601 to rotate, and the limiting pipe 6 drives the second outlet pipe 5 to rotate. The water flow in the limiting pipe 6 enters the inside of the first outlet pipe 3, increases the flow rate and then sprays out;

[0085] S3: As the opening angle of the valve core 2 increases, the through holes on the outer side wall of the second outlet pipe 5 coincide with the through holes on the outer side wall of the sleeve 4, enabling the water flow to enter the inside of the first outlet pipe 3. When the water flow passes through the first outlet pipe 3, it sprays out at a reduced flow rate, achieving a water-saving effect;

[0086] S4: The water flow sprayed out through the first outlet pipe 3 is dispersed by the filter screen 7, enriching the bubbles in the water flow, improving the cleaning ability of the water flow, and achieving a water-saving effect.

Claims

1. An adjustable multi-stage water-saving valve for a pipeline, comprising a housing (1) formed by a front cover and a rear cover buckled together in a front-to-back manner, wherein the housing (1) comprises a flow channel extending in a front-to-back direction along a length direction, characterized in that: It also includes a "T"-shaped limiting groove on both upper and lower sides of the internal flow channel of the shell (1), a valve core (2) is arranged in the flow channel of the shell (1), the valve core (2) is in the shape of an "I", the horizontal part of the valve core (2) is arranged in the limiting groove of the shell (1), a water outlet pipe (3) is arranged in the water outlet side opening of the shell (1), a sleeve (4) is arranged inside the water outlet pipe (3), a water outlet pipe (5) is passed through the sleeve (4), the end of the water outlet pipe (5) is connected to the limiting pipe (6), and the limiting pipe (6) is clamped in the groove of the side wall of the valve core (2); The outer side of the limit tube (6) is sleeved with a first gear ring (601), and the outer side of the valve core (2) is provided with a second gear ring (201), and a transmission relationship is established between the first gear ring (601) and the second gear ring (201); A filter screen (7) is provided in the water outlet opening of the first water outlet pipe (3), an annularly distributed water outlet is provided on the outer peripheral surface of the sleeve (4), and an annularly distributed water outlet is provided on the outer peripheral surface of the second water outlet pipe (5); A valve stem (101) is provided at the top of the shell (1); one end of the valve stem (101) passes through the top of the shell (1) and is embedded in the top of the valve core (2); A through hole perpendicular to the central axis is provided in the middle of the valve core (2), and a cross-shaped guide plate (203) is provided in the through hole in the middle of the valve core (2); The diameter of the through hole in the middle of the valve core (2) is the same as the inner diameter of the limit tube (6), and the limit tube (6) abuts against the side wall of the valve core (2); A positioning ring (204) is sleeved on the middle part of the valve core (2), and the positioning ring (204) is arranged on the top of the first gear ring (601); A sleeve (102) is provided at the top center of the housing (1), the sleeve (102) being sleeved on the outside of the valve stem (101), a groove being provided on the top surface of the sleeve (102), a positioning plate (103) being embedded in the interior of the groove, and a positioning hole being provided on the surface of the positioning plate (103); A positioning rod (104) is provided through the side wall of the valve stem (101), and a spring (105) is provided between the positioning rod (104) and the valve stem (101).

2. The adjustable multi-stage water-saving valve for pipelines according to claim 1 is characterized in that: The valve core (2) comprises limiting portions (202) of cylindrical structure at both ends thereof, and the limiting portions (202) are embedded in the horizontal portion of the limiting groove of the housing (1).

3. The adjustable multi-stage water-saving valve for pipelines according to claim 1 is characterized in that: The top of the valve core (2) is provided with a slide groove, the slide groove is arranged along the flow channel direction of the housing (1), and the valve stem (101) is clamped in the slide groove at the top of the valve core (2).

4. The adjustable multi-stage water-saving valve for pipelines according to claim 1 is characterized in that: The end of the limiting tube (6) is provided with a water outlet hole, the edge of the end of the limiting tube (6) is provided with a groove, and a sealing ring (602) is clamped inside the groove; The end of the water outlet pipe 1 (3) is provided with a water outlet hole identical to that of the position limiting pipe (6), and the water outlet pipe 1 (3) is arranged to fit the end of the position limiting pipe (6).

5. The adjustable multi-stage water-saving valve for pipelines according to claim 1 is characterized in that: A dividing bar (701) is arranged inside the filter screen (7); the dividing bar (701) is annular in shape; the size of the dividing bar (701) is the same as the size of the sleeve (4); and the dividing bar (701) is arranged to fit the opening of the sleeve (4).

6. The adjustable multi-stage pipeline water-saving valve according to claim 1 is characterized in that: The outer side wall of the water outlet pipe 1 (3) is provided with threads, and the water outlet pipe 1 (3) and the housing (1) are fastened by the threads.

7. The adjustable multi-stage water-saving valve for pipelines according to claim 1, characterized in that: The water inlet side of the housing (1) is connected to a limit joint (8), the limit joint (8) is clamped in a groove on the side wall of the valve core (2), and an O-ring is provided on the side of the limit joint (8) facing the valve core (2).

8. The method for using the adjustable multi-stage pipeline water-saving valve according to any one of claims 1 to 7, characterized in that: S1: After the device is assembled as a whole, the housing (1) is installed in the pipeline, and the valve stem (101) is rotated to drive the valve core (2) to rotate, thereby turning on and off the water flow; S2: During the rotation of the valve core (2), the second gear ring (201) drives the first gear ring (601) to rotate, and the limit tube (6) drives the second water outlet pipe (5) to rotate, and the water in the limit tube (6) enters the first water outlet pipe (3) and is ejected after the flow rate is increased; S3: the opening angle of the valve core (2) increases, the through hole on the outer wall of the second outlet pipe (5) coincides with the through hole on the outer wall of the sleeve (4), so that water can flow into the first outlet pipe (3). When the water flows through the first outlet pipe (3), the flow rate is reduced and the water is sprayed out, achieving a water-saving effect; S4: The water flow sprayed out through the water outlet pipe 1 (3) is dispersed by the filter screen (7), thereby enriching the bubbles in the water flow, improving the cleaning ability of the water flow, and achieving a water-saving effect.

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