CN219975511U - Pressure limiting valve system for controlling water flow - Google Patents

Abstract

The utility model discloses a pressure limiting valve system for controlling the water flow, which belongs to the field of flow limiting valves and solves the problem that the existing pressure limiting valve cannot realize the adjustment and the opening and closing control of the water flow. The utility model is mainly used for adjusting the water flow of the pressure limiting valve and controlling the opening and closing of the pressure limiting valve.

Description

Pressure limiting valve system for controlling water flow

Technical Field

The utility model relates to a flow limiting valve, in particular to a pressure limiting valve system for controlling the water flow.

Background

In order to ensure stable water outlet, the existing water supply waterway is usually provided with a limiting valve, as disclosed in patent CN208997407U, a water supply system and a pressure limiting valve are provided, a water inlet end and a water outlet end are arranged on the valve body, and a first through hole is formed in the valve body; the water guide pipe is arranged in the first through hole, one end of the water guide pipe is connected with the water inlet end, the piston is slidably arranged in the first through hole, the piston is close to the water outlet end, one end of the water guide pipe and one end of the piston are correspondingly arranged at intervals, a containing hole is formed in the piston, and the water guide pipe can extend into the containing hole; the tensioning piece is sleeved outside the water guide pipe and is used for being in interference fit with the piston. In the daily water supply process, the flow of water supply and the water supply period are often adjusted according to actual demands, and the pressure limiting valve in the device needs to control the flow of water and the opening and closing of the pressure limiting valve by means of other valves.

Disclosure of Invention

The utility model aims to provide a pressure limiting valve system for controlling the water flow, which solves the problem that the existing pressure limiting valve cannot realize the adjustment of the water flow and the control of the opening and closing of the pressure limiting valve, so that the pressure limiting valve can realize the adjustment of the water flow and the control of the opening and closing of the pressure limiting valve.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a pressure limiting valve system of control rivers size, includes valve body and case, the inside valve pocket that is equipped with of valve body, open on the valve body have with the water inlet and the delivery port that the valve pocket is linked together, be equipped with in the valve pocket with valve body fixed connection's body, the body inside is equipped with the body cavity that is used for installing the case, sliding connection between case and the body cavity, the inside valve pocket that is equipped with of case, the outside of the one end of case towards the water inlet is equipped with and is used for with valve pocket complex end cap, be provided with the elasticity reposition of redundant personnel between case and the body, the case has the trend of keeping away from the end cap through the elasticity effect of elasticity reposition of redundant personnel, the size of the discharge of delivery port is decided by the aperture between case and the end cap, be equipped with the switch knob that is used for driving the relative end cap motion of case in order to adjust the aperture on the valve body.

After the technical scheme is adopted, the utility model has the following advantages: firstly, through sliding connection between case and the body cavity, the outside of the one end of case orientation water inlet is equipped with and is used for with valve opening complex end cap, be connected through the elasticity piece that resets between case and the body, the case can be through the water pressure in the valve pocket and the elasticity combined action of elasticity piece that resets and remove adaptively, the aperture between adjusting case and the end cap realizes the pressure limiting function, secondly, set up switch knob, the case is through the drive of switch knob and the elasticity combined action of elasticity piece that resets and remove, realize the aperture between manual adjustment case and the end cap, realize the regulation of discharge size and the switching of pressure limiting valve, the function is diversified, need not to additionally set up the valve and control, the steam generator is simpler in structure, it is more convenient to install.

Further, the valve core is provided with a minimum opening position for enabling the valve hole to be in a minimum opening state and a maximum opening position for enabling the valve hole to be in a maximum opening state, and the switch knob drives the valve core to switch between the minimum opening position and the maximum opening position. By adopting the technical scheme, the valve core has the minimum opening position which enables the valve hole to be in the minimum opening state, the opening amplitude of the valve hole is enabled to be in the minimum, the small-flow water supply is met, the valve core has the maximum opening position which enables the valve hole to be in the maximum opening state, the opening amplitude of the valve hole is enabled to be in the maximum, the large-flow water supply is met, and meanwhile, the switch knob drives the valve core to switch between the minimum opening position and the maximum opening position, so that the water flow is regulated. The minimum opening state may be a state in which the valve hole is closed, according to actual needs.

Further, the switch knob is perpendicular to the valve body, the pipe body or the valve core, the valve body is provided with an installation through hole, the pipe body is provided with a limiting hole communicated with the installation through hole, the surface of the valve core is provided with a first check ring, the lower part of the switch knob is provided with an elliptical structure, the elliptical structure of the switch knob is contacted and matched with the first check ring after the switch knob penetrates into the installation through hole and the limiting hole in sequence, the rotating motion of the switch knob drives the elliptical structure to rotate, and the rotating motion of the elliptical structure drives the valve core to move along the axial direction. By adopting the technical scheme, because the radial diameters of the elliptical structures are different, and the limiting hole plays a limiting role on the axial movement of the switch knob, through rotating the switch knob, the different diameter parts of the elliptical structures are contacted with the valve core, and the valve core is driven to move along the axial movement, so that the opening between the valve core and the plug is regulated, the regulation of water flow is realized, the use is convenient, and the structure is simpler.

Further, the switch knob extends downwards to form a protruding arm, a first limit protrusion is arranged at the bottom end of the protruding arm, a second limit protrusion is arranged in the mounting through hole, the first limit protrusion is in contact fit with the second limit protrusion to enable the valve core to be kept at the minimum opening position, and the protruding arm can deform around the lower part of the switch knob under the action of external force; or, the switch knob extends downwards to form a protruding arm, a limit rib is arranged at the bottom end of the protruding arm, a limit groove is arranged in the mounting through hole, the limit rib is matched with the limit groove to enable the valve core to be kept at the minimum opening position, and the protruding arm can deform around the lower part of the switch knob under the action of external force. By adopting the technical scheme, in one technical scheme, the switch knob with stable structure can be formed by arranging the first limit bulge and the second limit bulge, so that the switch knob is effectively prevented from loosening, the valve core is kept at the minimum opening position, the reliability of the pressure limiting valve when being closed is improved, the protruding arm can deform around the lower part of the switch knob by external force, when in use, a certain torsion force is applied to rotate the switch knob, the first limit bulge is separated from the limit of the second limit bulge, the limit valve is opened, the water flow is regulated, and the first limit bulge and the second limit bulge are simpler in structure and convenient to process; or in another technical scheme, through setting up spacing muscle and spacing groove, can form the switch knob of stable in structure, effectively avoid the switch knob not hard up, make the case keep in minimum aperture position, the reliability when increasing the pressure limiting valve and closing, and the projecting arm receives external force can warp around the lower part of switch knob, when the user uses, exert certain torsion and rotate the switch knob, spacing muscle breaks away from the spacing of spacing groove, opens the limiting valve and adjusts the size of discharge.

Further, the plug is in threaded connection with the pipe body, one end face of the plug facing the valve hole is a conical surface, a first sealing ring is arranged on the surface of the plug, and when the valve core is at the minimum opening position, the plug plugs the valve hole through the conical surface and the first sealing ring; or the plug is in threaded connection with the valve body, one end face of the plug facing the valve hole is a conical surface, a first sealing ring is arranged on the surface of the plug, and when the valve core is positioned at the minimum opening position, the plug plugs the valve hole through the conical surface and the first sealing ring. By adopting the technical scheme, in one technical scheme, the conical surface is propped against the inner wall of the valve hole, and the first sealing ring is propped against the inner wall of the valve hole, so that a double sealing effect is formed, and the sealing effect is improved when the valve core is positioned at the minimum opening position; or in another technical scheme, the plug can be connected with the valve body through threads, reliable connection is achieved, and a double blocking effect is formed by abutting the conical surface with the inner wall of the valve hole and abutting the first sealing ring with the inner wall of the valve hole, so that the sealing effect is improved when the valve core is at the minimum opening position.

Further, a second check ring is arranged on the surface of the valve core, and when the valve core is at the minimum opening position, the elliptical structure of the switch knob abuts against the second check ring. By adopting the technical scheme, when the valve core is positioned at the minimum opening position through the second check ring, the elliptical structure of the switch knob is propped against the second check ring, so that the switch knob is further prevented from loosening, the performance reliability of the limit valve when being closed is further increased, and the elliptical structure of the switch knob can also play a limiting role on the second check ring, limit the transverse movement of the valve core, effectively prevent the valve core from being impacted by the pressure of water flow to the plug, effectively ensure the service life of the plug, and further ensure the sealing effect when the valve core is positioned at the minimum opening position.

Further, the pipe body is in interference fit with the valve cavity, and a second sealing ring is arranged between one end, close to the water inlet, of the pipe body and the inner wall of the valve cavity. By adopting the technical scheme, the double sealing effect is achieved by interference fit and the second sealing ring, water flow is effectively prevented from flowing through a gap between the pipe body and the valve cavity, and the control accuracy of the water flow of the pressure limiting valve system is ensured.

Further, one end of the pipe body, which is close to the water outlet, is provided with a pressure regulating check ring for preventing water flow from entering the pipe cavity from the valve hole, a first positioning groove is formed between one end of the pipe body, which is close to the water outlet, and the valve body, a second positioning groove is formed in the surface of the valve core, one end of the pressure regulating check ring is embedded into the first positioning groove, and the other end of the pressure regulating check ring is embedded into the second positioning groove. Adopt aforementioned technical scheme, through setting up the pressure regulating retaining ring, on the one hand, promote the pressure regulating retaining ring through water pressure, make the case remove to realize the pressure limiting effect, on the other hand, realize effectively preventing rivers from getting into the body cavity from the valve opening, be favorable to making the rivers of valve opening discharge from the delivery port, and set up first constant head tank and second constant head tank, increase the installation reliability of pressure regulating retaining ring, thereby ensure sealed effect.

Further, the pressure of the water outlet is increased, and the elastic force of the elastic reset piece is overcome, so that the valve core is separated from the maximum opening position. By adopting the technical scheme, the opening degree between the valve core and the plug is automatically adjusted by increasing the pressure of the water outlet and overcoming the elasticity of the elastic reset piece, so that the pressure limiting function is realized.

Further, the valve body comprises a water inlet connector and a water outlet connector, and the water inlet connector and the water outlet connector are in threaded connection to form the valve body. By adopting the technical scheme, the structure is simple, and the assembly is convenient.

Drawings

The utility model is further described below with reference to the accompanying drawings:

FIG. 1 is a schematic diagram of a pressure limiting valve system for controlling the water flow in the present utility model (valve hole is at minimum opening state);

FIG. 2 is a schematic diagram of a pressure limiting valve system for controlling the water flow in the present utility model (the valve hole is in the maximum opening state);

FIG. 3 is an exploded view of the pressure limiting valve of the present utility model;

FIG. 4 is a schematic view of a switch knob according to the present utility model;

FIG. 5 is a cross-sectional view of a switch knob of the present utility model;

in the figure, 1, a valve body; 11. a valve cavity; 12. a water inlet; 13. a water outlet; 14. mounting through holes; 15. a water inlet joint; 16. a water outlet joint; 2. a valve core; 21. a valve hole; 22. a first retainer ring; 23. the second check ring; 24. a second positioning groove; 3. a tube body; 31. a lumen of the tube; 32. a limiting hole; 33. a first positioning groove; 4. a plug; 41. a conical surface; 5. a switch knob; 51. an elliptical structure; 52. a protruding arm; 53. the first limiting protrusion; 61. a first seal ring; 62. a second seal ring; 63. a pressure regulating retainer ring; 64. a third seal ring; 7. an elastic reset piece.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments.

The terms "first," "second," "third," "fourth" and the like in the description and in the claims and in the above drawings, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the utility model described herein may be implemented in sequences other than those illustrated or otherwise described herein.

It should be understood that, in various embodiments of the present utility model, the size of the sequence numbers of each process is not meant to indicate the order of execution, and the order of execution of each process should be determined by its functions and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present utility model.

It should be understood that in the present utility model, "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements that are expressly listed or inherent to such process, method, article, or apparatus.

It should be understood that in the present utility model, "plurality" means two or more. "and/or" is merely an association relationship describing an association object, meaning that three relationships may exist, for example, X and/or Y may represent: x alone, X and Y together, and Y alone. The character "/" generally indicates that the context-dependent object is an "or" relationship. "comprising X, Y and Z", "comprising X, Y, Z" means that all three of X, Y, Z comprise, "comprising X, Y or Z" means that one of the three comprises X, Y, Z, and "comprising X, Y and/or Z" means that any one or any two or three of the three comprise X, Y, Z.

The technical scheme of the utility model is described in detail below by specific examples. The following specific embodiments may be combined with or replaced with each other according to actual situations, and the same or similar concepts or processes may not be described in detail in some embodiments.

As shown in fig. 1 to 5, the utility model provides a pressure limiting valve system for controlling the water flow, which comprises a valve body 1 and a valve core 2, wherein a valve cavity 11 is arranged in the valve body 1, a water inlet 12 and a water outlet 13 which are communicated with the valve cavity 11 are formed in the valve body 1, a pipe body 3 fixedly connected with the valve body 1 is arranged in the valve cavity 11, a pipe cavity 31 for installing the valve core 2 is arranged in the pipe body 3, the valve core 2 is slidably connected with the pipe cavity 31, a valve hole 21 is formed in the valve core 2, a plug 4 which is matched with the valve hole 21 is arranged at the outer side of one end of the valve core 2 facing the water inlet 12, an elastic reset piece 7 is arranged between the valve core 2 and the pipe body 3, the valve core 2 has a trend of keeping away from the plug 4 under the elastic action of the elastic reset piece 7, the water flow of the water outlet 13 is determined by the opening between the valve core 2 and the plug 4, and a switch knob 5 for driving the valve core 2 to move relative to the plug 4 so as to adjust the opening is arranged on the valve body 1.

Firstly, through sliding connection between case 2 and the body cavity 31, the outside of the one end of case 2 towards water inlet 12 is equipped with and is used for with valve opening 21 complex end cap 4, be connected through elasticity reset piece 7 between case 2 and the body 3, case 2 can be through the water pressure in the valve pocket 11 and elasticity combined action of elasticity reset piece 7 and remove adaptively, the aperture between regulation case 2 and the end cap 4 realizes the pressure limiting function, secondly, set up switch knob 5, case 2 moves through the drive of switch knob 5 and elasticity combined action of elasticity reset piece 7, realize the aperture between manual adjustment case 2 and the end cap 5, realize the regulation of discharge size and the switching of pressure limiting valve, the function is diversified, need not to additionally set up the valve and control, the structure is simpler, it is more convenient to install.

As shown in fig. 2, when the pressure limiting valve is opened by adjusting the switch knob 5, when the water pressure at the water outlet 13 side is greater than the water pressure at the water inlet 12 side, the valve core 2 moves from right to left under the action of the water pressure, so that the opening between the valve core 2 and the plug 4 is reduced; when the water pressure at the water outlet 13 side is smaller than the water pressure at the water inlet 12 side, the valve core 2 moves from left to right under the action of the water pressure, so that the opening degree between the valve core 2 and the plug 4 is increased.

In the utility model, the valve body 1 comprises a water inlet joint 15 and a water outlet joint 16, and the water inlet joint 15 and the water outlet joint 16 are in threaded connection to form the valve body 1. Simple structure, the assembly of being convenient for.

In order to further realize the adjustment of the flow rate, the valve element 2 has a minimum opening position in which the valve hole 21 is in a minimum opening state and a maximum opening position in which the valve hole 21 is in a maximum opening state, and the switching knob 5 switches the valve element 2 between the minimum opening position and the maximum opening position. By the device, the valve core 2 has the minimum opening position for enabling the valve hole 21 to be in the minimum opening state, the opening amplitude of the valve hole 21 is enabled to be at the minimum, the small-flow water supply is met, and the valve core 2 has the maximum opening position for enabling the valve hole 21 to be in the maximum opening state, the opening amplitude of the valve hole 21 is enabled to be at the maximum, the large-flow water supply is met, meanwhile, the switch knob 5 drives the valve core 2 to switch between the minimum opening position and the maximum opening position, and the water flow is regulated. The minimum opening state may be a state in which the valve hole 21 is closed, according to actual needs.

Specifically, the switch knob 5 is perpendicular to the valve body 1, the valve body 1 is provided with a mounting through hole 14, the pipe body 3 is provided with a limiting hole 32 communicated with the mounting through hole 14, the surface of the valve core 2 is provided with a first check ring 22, the lower part of the switch knob 5 is provided with an elliptical structure 51, the switch knob 5 sequentially penetrates into the mounting through hole 14 and the limiting hole 32 to enable the elliptical structure 51 of the switch knob 5 to be in contact with the first check ring 22, the elliptical structure of the switch knob 5 rotates, and the valve core 2 is driven to move axially by the rotating movement of the elliptical structure. Because the radial diameters of the elliptical structures 51 are different, and the limiting holes 32 play a limiting role on the axial movement of the switch knob 5, through rotating the switch knob 5, different diameter parts of the elliptical structures 51 are contacted with the valve core 2, the valve core 2 is driven to move along the axial movement, and accordingly the opening of the valve hole 21 is regulated, water flow is regulated, and the novel rotary valve is convenient to use and simple in structure.

It will be appreciated that the switch knob 5 may be disposed perpendicular to the tube 3 or perpendicular to the valve core 2.

In the present utility model, the switch knob 5 may be rotated by 90 °, and by rotating the switch knob 5, the elliptical structure 51 is rotated from the end with the larger diameter to the end with the smaller diameter to be abutted against the first retainer ring 22, the opening of the valve hole 21 is changed from small to large, the water flow is changed from small to large, and the switch knob 5 is rotated in the opposite direction, so that the water flow is changed from large to small until the water flow is closed.

One end of the elastic restoring member 7 abuts against the first retainer ring 22, and the other end abuts against the tube body 3.

It should be noted that, the third sealing ring 64 is disposed between the valve body 1 and the end of the pipe body 3 located at the water inlet 12, so as to further improve the sealing effect and increase the accuracy of flow adjustment.

To position the switch knob 5, in one embodiment, the switch knob 5 extends downward to form a protruding arm 52, a first limiting protrusion 53 is disposed at the bottom end of the protruding arm 52, a second limiting protrusion is disposed in the mounting through hole 14, and the first limiting protrusion 53 and the second limiting protrusion are in contact and cooperate to keep the valve core 2 at a minimum opening position, so that the protruding arm 52 can deform around the lower portion of the switch knob 5 under external force. Through setting up first spacing arch 53 and the spacing arch of second, can form the spacing knob 5 of stable in structure, effectively avoid the knob 5 to become flexible, make case 2 keep in minimum aperture position, the reliability when increasing the pressure limiting valve and closing, and the projecting arm 52 receives external force can be by the lower part deformation of knob 5 of switch, when the user uses, exert certain torsion and come rotatory knob 5, first spacing arch 53 breaks away from the spacing of the spacing bellied of second, open limiting valve and adjust the bellied structure of water flow, and set up first spacing arch 53 and the spacing bellied of second simpler, the processing of being convenient for.

When the protruding arm 52 deforms around the lower portion of the switch knob 5 by an external force, the protruding arm 52 may approach the switch knob 5 in the radial direction. And is not limited thereto.

In another embodiment, the switch knob 5 extends downwards to form a protruding arm 52, a limiting rib is arranged at the bottom end of the protruding arm 52, a limiting groove is arranged in the mounting through hole 14, the limiting rib is matched with the limiting groove to enable the valve core 2 to be kept at the minimum opening position, and the protruding arm 52 can be deformed around the lower portion of the switch knob 5 under the action of external force. Through setting up spacing muscle and spacing groove, can form stable in structure's switch knob 5, effectively avoid switch knob 5 not hard up, make case 2 keep in minimum aperture position, the reliability when increasing the pressure limiting valve and closing to and protruding arm 52 receives external force can be out of shape around switch knob 5's lower part, and when the user used, apply certain torsion and rotate switch knob 5, spacing muscle breaks away from spacing in spacing groove, opens the limiting valve and adjusts the size of discharge.

And a second check ring 23 is arranged on the surface of the valve core 2, and when the valve core 2 is at the minimum opening position, the elliptical structure 51 of the switch knob 5 is abutted against the second check ring 23. By adopting the technical scheme, when the valve core 2 is positioned at the minimum opening position through the arrangement of the second check ring 23, the elliptical structure 51 of the switch knob 5 abuts against the second check ring 23, the switch knob 5 is further prevented from loosening, the performance reliability of the limit valve when closed is further increased, and the elliptical structure 51 of the switch knob 5 can also play a limiting role on the second check ring 23 to limit the transverse movement of the valve core 2, so that the valve core 2 is effectively prevented from being impacted by the pressure of water flow to the plug 4 continuously, the service life of the plug 4 is effectively ensured, and the sealing effect of the valve core 2 is ensured when positioned at the minimum opening position.

In order to increase the sealing effect when the valve core 2 is at the minimum opening position, in one embodiment, the plug 4 is in threaded connection with the pipe body 3, one end surface of the plug 4 facing the valve hole 21 is a conical surface 41, a first sealing ring 61 is arranged on the surface of the plug 4, and when the valve core 2 is at the minimum opening position, the plug 4 seals the valve hole 21 through the conical surface 41 and the first sealing ring 61. By abutting the conical surface 41 against the inner wall of the valve hole 21 and the first seal ring 61 against the inner wall of the valve hole 21, a double sealing effect is formed, and the sealing effect when the valve element 2 is at the minimum opening position is increased.

In another embodiment, the plug 4 is in threaded connection with the valve body 1 to achieve reliable connection, one end face of the plug 4 facing the valve hole 21 is a conical surface, a first sealing ring 61 is arranged on the surface of the plug 4, and when the valve core 2 is in the minimum opening position, the plug 4 seals the valve hole 21 through the conical surface and the first sealing ring 61.

In order to ensure the performance reliability of the pressure limiting valve, the pipe body 3 is in interference fit with the valve cavity 11, and a second sealing ring 62 is arranged between one end of the pipe body 3, which is close to the water inlet 12, and the inner wall of the valve cavity 11. Through interference fit and setting up second sealing washer 62, play dual seal effect, effectively prevent that rivers from flowing through from the clearance between body 3 and the valve pocket 11, guarantee the control accuracy of the discharge of pressure limiting valve system.

And one end of the pipe body 3 close to the water outlet 13 is provided with a pressure regulating check ring 63 for preventing water flow from entering the pipe cavity 31 from the valve hole 21, a first positioning groove 33 is arranged between one end of the pipe body 3 close to the water outlet 13 and the valve body 1, the surface of the valve core 2 is provided with a second positioning groove 24, one end of the pressure regulating check ring 63 is embedded into the first positioning groove 33, and the other end is embedded into the second positioning groove 24. By adopting the foregoing technical solution, through setting up the pressure regulating retaining ring 63, on the one hand, through hydraulic pressure promotion pressure regulating retaining ring 63, make case 2 remove to realize the pressure limiting effect, on the other hand, realize effectively preventing that rivers from getting into the body cavity 31 from valve opening 21, be favorable to making the rivers of valve opening 21 discharge from delivery port 13, and set up first constant head tank 33 and second constant head tank 24, increase the installation reliability of pressure regulating retaining ring 63, thereby ensure sealed effect.

And the pressure of the water outlet 13 is increased and overcomes the elastic force of the elastic restoring piece 7, so that the valve core 2 is separated from the maximum opening position. The opening degree between the valve core 2 and the plug 4 is automatically adjusted by increasing the pressure of the water outlet 13 and overcoming the elasticity of the elastic reset piece 7, so that the pressure limiting function is realized.

When the water pressure exceeds a certain value, the left and right pressure of the pressure regulating check ring 63 is unbalanced, the water pressure pushes the pressure regulating check ring 63 and the valve core 2 to move, the opening degree is reduced, the flow is reduced, the water pressure is reduced, and the elastic force and the water pressure of the elastic reset piece 7 are balanced, so that the pressure limiting effect is achieved.

In the present utility model, the elastic restoring member 7 may have a suitable structure such as a spring or a torsion spring.

In addition to the preferred embodiments described above, other embodiments of the present utility model are also contemplated as falling within the scope of the claimed utility model, as well as all other embodiments that may be made by one of ordinary skill in the art without making any inventive effort based on the embodiments of the present utility model.

Claims (10)

1. The utility model provides a pressure limiting valve system of control rivers size, including valve body and case, its characterized in that, the inside valve pocket that is equipped with of valve body, open on the valve body have with the water inlet and the delivery port that the valve pocket is linked together, be equipped with in the valve pocket with valve body fixed connection's body, body inside is equipped with the body cavity that is used for installing the case, sliding connection between case and the body cavity, the inside valve opening that is equipped with of case, the case is equipped with the end cap that is used for with valve opening complex towards the outside of the one end of water inlet, be provided with the elasticity reposition of redundant personnel between case and the body, the case has the trend of keeping away from the end cap through the elasticity effect of elasticity reposition of redundant personnel, the size of the discharge of delivery port is decided by the aperture between case and the end cap, be equipped with the shift knob that is used for driving the relative end cap motion of case in order to adjust the aperture on the valve body.

2. The pressure limiting valve system of claim 1, wherein the valve element has a minimum opening position for setting the valve opening to a minimum opening state and a maximum opening position for setting the valve opening to a maximum opening state, and the switch knob switches the valve element between the minimum opening position and the maximum opening position.

3. The pressure limiting valve system for controlling the water flow according to claim 2, wherein the switch knob is vertically arranged with the valve body, the pipe body or the valve core, the valve body is provided with a mounting through hole, the pipe body is provided with a limiting hole communicated with the mounting through hole, the surface of the valve core is provided with a first check ring, the lower part of the switch knob is provided with an elliptical structure, the elliptical structure of the switch knob is contacted and matched with the first check ring after the switch knob penetrates into the mounting through hole and the limiting hole in sequence, the rotating motion of the switch knob drives the elliptical structure to rotate, and the rotating motion of the elliptical structure drives the valve core to axially move.

4. The pressure limiting valve system for controlling the water flow according to claim 3, wherein the switch knob extends downwards to form a protruding arm, a first limiting protrusion is arranged at the bottom end of the protruding arm, a second limiting protrusion is arranged in the mounting through hole, the first limiting protrusion is in contact fit with the second limiting protrusion to enable the valve core to be kept at the minimum opening position, and the protruding arm can deform around the lower part of the switch knob under the action of external force; or, the switch knob extends downwards to form a protruding arm, a limit rib is arranged at the bottom end of the protruding arm, a limit groove is arranged in the mounting through hole, the limit rib is matched with the limit groove to enable the valve core to be kept at the minimum opening position, and the protruding arm can deform around the lower part of the switch knob under the action of external force.

5. The pressure limiting valve system for controlling the water flow according to claim 4, wherein the plug is in threaded connection with the pipe body, one end face of the plug facing the valve hole is a conical surface, a first sealing ring is arranged on the surface of the plug, and when the valve core is at the minimum opening position, the plug seals the valve hole through the conical surface and the first sealing ring; or the plug is in threaded connection with the valve body, one end face of the plug facing the valve hole is a conical surface, a first sealing ring is arranged on the surface of the plug, and when the valve core is positioned at the minimum opening position, the plug plugs the valve hole through the conical surface and the first sealing ring.

6. The pressure limiting valve system for controlling the size of water flow according to claim 4, wherein the surface of the valve core is provided with a second check ring, and when the valve core is at the minimum opening position, the elliptical structure of the switch knob is abutted against the second check ring.

7. The pressure limiting valve system for controlling the water flow according to claim 1, wherein the pipe body is in interference fit with the valve cavity, and a second sealing ring is arranged between one end of the pipe body, which is close to the water inlet, and the inner wall of the valve cavity.

8. The pressure limiting valve system for controlling the water flow according to claim 7, wherein a pressure regulating check ring for preventing water flow from entering the pipe cavity from the valve hole is arranged at one end of the pipe body close to the water outlet, a first positioning groove is arranged between one end of the pipe body close to the water outlet and the valve body, a second positioning groove is arranged on the surface of the valve core, one end of the pressure regulating check ring is embedded into the first positioning groove, and the other end of the pressure regulating check ring is embedded into the second positioning groove.

9. A pressure limiting valve system for controlling the size of a water flow according to any one of claims 1 to 8, wherein the pressure of the water outlet is increased and overcomes the elastic force of the elastic restoring member to enable the valve core to leave the maximum opening position.

10. The pressure limiting valve system for controlling the size of a water flow according to claim 1, wherein the valve body comprises a water inlet connector and a water outlet connector which are in threaded connection to form the valve body.