CN220706500U - Plug-in type pressure reducing valve - Google Patents

Abstract

The utility model discloses a plug-in type pressure reducing valve, which belongs to the technical field of pressure reducing valve manufacturing and comprises a shell, wherein a cavity is formed in the left end of the shell, a first flow hole and a second flow hole are formed in the shell, the right end of a connecting bolt is in threaded connection with the shell, the left end of the connecting bolt is fixedly connected with a spring barrel, a valve core assembly is connected in the cavity of the connecting bolt, the oil inlet end and the oil outlet end of the valve core assembly are respectively communicated with the left end and the right end of the cavity, an elastic adjusting assembly is connected with the left end of the spring barrel, and the elastic adjusting assembly is connected with the valve core assembly. Through the mode, the right end of the connecting bolt is in threaded connection with the shell, the position of the pressure reducing valve can be flexibly designed, and the unidirectional valve seat is provided with a plurality of first round holes and a plurality of second round holes; the first flow hole and the second flow hole can be formed in the shell according to different requirements, so that the position of the pressure reducing valve is more reasonable; the plug-in type pressure reducing valve is small in size, can be used when space is tense, and is convenient to store.

Description

Plug-in type pressure reducing valve

Technical Field

The utility model relates to the technical field of manufacturing of pressure reducing valves, in particular to a plug-in type pressure reducing valve.

Background

The pressure reducing valve is used for controlling the pressure of the fluid in the pipeline, so that damage and danger caused by high pressure are avoided. Some equipment requires the use of liquids or gases during production, in which case if the pressure is too high, this can lead to damage to the piping, equipment or explosion, with a significant risk to personnel and equipment. The pressure of the fluid in the pipeline can be ensured to be within a safe range by regulating the fluid through the pressure reducing valve.

The Chinese patent No. 108150684B discloses a two-way pressure reducing valve, which comprises a valve body, wherein an A port and a P port are arranged on the valve body, a screw sleeve is arranged in the valve body, a first valve seat and a control push rod are arranged in the screw sleeve, a first steel ball matched with the first valve port is arranged in the first valve seat, a first through hole communicated with the P port and the first valve port is arranged on the first valve seat, an overflow hole communicated with the A port and an inner through cavity thereof is arranged on the screw sleeve, a small diameter part at the upper end of the control push rod is slidably arranged in an inner hole of the screw sleeve, a large diameter part at the middle part of the control push rod is in clearance liquid seal fit with the through cavity of the screw sleeve and is formed with a buffer cavity, the lower end of the control push rod is matched with the first steel ball, and a large spring seat matched with the upper part of the control push rod are arranged in the upper part of the screw sleeve.

The two-way pressure reducing valve is of an assembly plate type structure, is fixed in installation form, is fixed in oil port position, is large in size and is not beneficial to being used when space is tense.

Based on this, the present utility model has devised a cartridge-type pressure reducing valve to solve the above-mentioned problems.

Disclosure of Invention

In view of the above-mentioned shortcomings of the prior art, the present utility model provides a cartridge-type pressure relief valve.

In order to achieve the above purpose, the utility model is realized by the following technical scheme:

the plug-in type pressure reducing valve comprises a shell,

the cavity has been seted up to the left end of casing, first flow hole has been seted up to the front end of casing, the second flow hole has been seted up to the right-hand member of casing, first flow hole, second flow hole respectively with the front end and the right-hand member intercommunication of cavity, connecting bolt's right-hand member embedding cavity is interior and with casing threaded connection, connecting bolt's left end embedding spring section of thick bamboo in the recess and with spring section of thick bamboo fixed connection, be connected with the case subassembly in connecting bolt's the inner chamber, and the oil feed end and the oil outlet end of case subassembly respectively with the left end and the right-hand member intercommunication of cavity, spring section of thick bamboo's left end is connected with elasticity regulation subassembly, elasticity regulation subassembly is connected with the case subassembly.

Further, the first and second flow holes are circular holes.

Further, a washer is sleeved at the transverse part of the connecting bolt, and the washer is in fit contact with the protruding part of the connecting bolt and the side wall of the shell.

Still further, elasticity adjusting part includes spring holder, M8 nut, interior hexagonal cylinder head holding screw and rectangle spring, two spring holders are located the left and right sides end recess of spring section of thick bamboo and with spring section of thick bamboo sliding connection, M8 nut and the left end laminating contact of spring section of thick bamboo, M8 nut cover is on interior hexagonal cylinder head holding screw and with interior hexagonal cylinder head holding screw threaded connection, the right-hand member and the spring section of thick bamboo threaded connection of interior hexagonal cylinder head holding screw, the right-hand member tip and the spring holder fixed connection of left end of interior hexagonal cylinder head holding screw, rectangle spring is located the recess of spring section of thick bamboo, the both ends of rectangle spring all with spring holder fixed connection, the spring holder and the left end laminating contact of connecting bolt of right-hand member, the spring holder and the case subassembly of right-hand member are connected.

Further, the valve core component comprises a one-way valve seat, a valve core, a filter screen, an end cover, a first O-shaped ring, a first retainer ring, a steel ball, a spring, a second O-shaped ring, a second retainer ring, a first round hole, a second round hole, a first annular groove, a second annular groove, a third flow through hole, a mounting groove, a first through flow cavity and a second through flow cavity, wherein the valve core is slidingly connected in the inner cavity of the connecting bolt, the left end part of the valve core is fixedly connected with a spring seat at the right end, the left end of the valve core is provided with the first annular groove, the first O-shaped ring and the second retainer ring are sleeved in the first annular groove, the second O-shaped ring is positioned at the right side of the second retainer ring, the one-way valve seat is in contact connection with the cavity, the left end part of the one-way valve seat is provided with the first through flow cavity, the right end part of the one-way valve seat is provided with the second through flow cavity, the second through flow cavity and the first through flow cavity are respectively communicated with the left end and the right end of the cavity, the middle of the one-way valve seat is provided with a third flow hole which is communicated with the first flow cavity and the second flow cavity, the left end of the one-way valve seat is provided with a plurality of first round holes which are communicated with the cavity and the first flow cavity, the right end of the one-way valve seat is provided with a plurality of second round holes which are communicated with the cavity and the second flow cavity, the left end of the one-way valve seat is provided with a second annular groove which is positioned between the first round hole and the second round hole, the second annular groove is sleeved with a first O-shaped ring and a first check ring, the first O-shaped ring is positioned on the right side of the first check ring, the right end of the valve core is embedded into the first flow cavity, the small diameter part of the right end of the valve core is slidingly arranged in the third flow hole, the end part of the right end of the valve core is connected with a steel ball which is positioned in the second flow cavity, the end part of the right end of the one-way valve seat is fixedly connected with an end cover, the left end of the end cover is provided with a mounting groove, the right end of the spring is embedded into the mounting groove and is fixedly connected with the end cover, the left end of the spring is fixedly connected with the steel ball, and the filter screen is sleeved at the position where the right end of the one-way valve seat is provided with the second round hole.

Further, the diameter of the steel ball is larger than the diameter of the third through hole.

Further, a plurality of first round holes are formed at equal intervals.

Further, a plurality of second round holes are formed at equal intervals.

Furthermore, the left side of the steel ball is conical.

Further, the right end of the third flow hole is a conical hole.

Advantageous effects

The right end of the connecting bolt is in threaded connection with the shell, so that the position of the pressure reducing valve can be flexibly designed, hydraulic oil enters the valve core assembly from the second flow hole, the hydraulic oil entering the valve core assembly flows out from the first flow hole, and the gasket is used for stably connecting the connecting bolt and the shell;

in the initial state of the utility model, the oil pressure is zero, the rectangular spring drives the spring seat at the right end to extrude rightwards under the elastic action of the rectangular spring of the elastic adjusting component, the valve core component is acted by extrusion force, thereby leading the first flow hole to be communicated with the second flow hole,

when the oil pressure is regulated, the inner hexagonal socket head cap set screw on the left side is driven to rotate by the inner hexagonal socket head cap set screw, the spring seat on the left end is driven to move rightwards along the spring cylinder to compress the rectangular spring, and the elasticity of the rectangular spring is increased, so that the oil pressure in the first flow hole can be regulated;

the left end of the one-way valve seat is provided with the first round holes for communicating the cavities with the first through-flow cavities, and the right end of the one-way valve seat is provided with the second round holes for communicating the cavities with the second through-flow cavities, so that the first through-flow holes and the second through-flow holes can be formed in the shell according to different requirements, the positions of the first through-flow holes and the second through-flow holes are flexible, and the position of the pressure reducing valve is more reasonable;

when the hydraulic pressure is normal, the left end of the valve core assembly moves rightwards under the elastic action of the rectangular spring, the valve core pushes the steel ball away from the third flow hole, the valve core compresses the spring, hydraulic oil in the second flow hole enters the second flow through cavity and the mounting groove through the filter screen and the second round hole, flows into the first flow through cavity through the third flow through hole, and finally flows out of the first flow through hole through the first round hole;

when the hydraulic force born by the valve core is larger than the spring force of the rectangular spring, the valve core moves leftwards against the spring force of the rectangular spring, the right end of the valve core is separated from the steel ball, and the steel ball moves leftwards under the elastic action of the spring until the steel ball blocks the third flow hole, so that the communication between the first flow hole and the second flow hole is cut off;

according to the utility model, the first O-shaped ring and the first check ring increase the air tightness between the one-way valve seat and the shell, so that hydraulic oil in the second flow hole is prevented from directly entering the first flow hole through a gap between the one-way valve seat and the shell, and the second O-shaped ring and the second check ring increase the air tightness between the valve core and the one-way valve seat, so that the hydraulic oil is prevented from entering the spring cylinder;

according to the utility model, the third flow holes with different diameters can be formed according to different requirements, the plug-in type pressure reducing valve is small in size, can be used when space is tense, and is convenient to store.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is evident that the drawings in the following description are only some embodiments of the present utility model and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.

FIG. 1 is a perspective view of a main body structure of a plug-in type pressure reducing valve according to the present utility model;

FIG. 2 is a front view of the cartridge-type pressure relief valve of the present utility model;

FIG. 3 is a perspective view of a main body structure of a plug-in type pressure reducing valve according to the present utility model;

FIG. 4 is a cross-sectional view taken along the direction A-A of FIG. 2;

fig. 5 is an enlarged view at B in fig. 4.

Reference numerals in the drawings represent respectively:

1. a connecting bolt; 2. a one-way valve seat; 3. a spring cylinder; 4. a valve core; 5. a filter screen; 6. an end cap; 7. a housing; 8. a spring seat; 9. a first O-ring; 10. a first retainer ring; 11. a steel ball; 12. an M8 nut; 13. a gasket; 14. a hexagon socket cap set screw; 15. a first flow hole; 16. a second flow hole; 17. a rectangular spring; 18. a spring; 19. a second O-ring; 20. the second check ring; 21. a first round hole; 22. a second round hole; 23. a first annular groove; 24. a second annular groove; 25. a third flow hole; 26. a mounting groove; 27. a first through-flow chamber; 28. a second through-flow chamber; 29. a cavity.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present utility model more clear, 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. It will be apparent that the described embodiments are some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The utility model is further described below with reference to examples.

In some embodiments, referring to FIGS. 1-5 of the drawings, a cartridge-type pressure relief valve includes a housing 7;

the left end of the shell 7 is provided with a cavity 29, the front end of the shell 7 is provided with a first flow hole 15, the right end of the shell 7 is provided with a second flow hole 16, the first flow hole 15 and the second flow hole 16 are respectively communicated with the front end and the right end of the cavity 29, the right end of the connecting bolt 1 is embedded into the cavity 29 and is in threaded connection with the shell 7, the left end of the connecting bolt 1 is embedded into a groove of the spring cylinder 3 and is fixedly connected with the spring cylinder 3, a valve core component is connected in an inner cavity of the connecting bolt 1, an oil inlet end and an oil outlet end of the valve core component are respectively communicated with the left end and the right end of the cavity 29, the left end of the spring cylinder 3 is connected with an elastic adjusting component, and the elastic adjusting component is connected with the valve core component;

preferably, the first and second through holes 15 and 16 are circular holes;

preferably, a washer 13 is sleeved at the transverse part of the connecting bolt 1, and the washer 13 is in fit contact with the protruding part of the connecting bolt 1 and the side wall of the shell 7;

the right end of the connecting bolt 1 is in threaded connection with the shell 7, so that the position of the pressure reducing valve can be flexibly designed, hydraulic oil enters the valve core assembly from the second flow hole 16, the hydraulic oil entering the valve core assembly flows out from the first flow hole 15, and the gasket 13 is used for stably connecting the connecting bolt 1 and the shell 7;

the elastic adjusting assembly comprises spring seats 8, an M8 nut 12, an inner hexagonal cylindrical head set screw 14 and a rectangular spring 17, wherein the two spring seats 8 are positioned in grooves at the left end and the right end of the spring cylinder 3 and are in sliding connection with the spring cylinder 3, the M8 nut 12 is in fit contact with the left end of the spring cylinder 3, the M8 nut 12 is sleeved on the inner hexagonal cylindrical head set screw 14 and is in threaded connection with the inner hexagonal cylindrical head set screw 14, the right end of the inner hexagonal cylindrical head set screw 14 is in threaded connection with the spring cylinder 3, the right end of the inner hexagonal cylindrical head set screw 14 is fixedly connected with the spring seat 8 at the left end, the rectangular spring 17 is positioned in the groove of the spring cylinder 3, both ends of the rectangular spring 17 are fixedly connected with the spring seat 8 at the right end and the left end of the connecting bolt 1 in fit contact, and the spring seat 8 at the right end is connected with the valve core assembly;

in the initial state, the oil pressure is zero, the rectangular spring 17 drives the right spring seat 8 to extrude rightwards under the elastic action of the rectangular spring 17 of the elastic adjusting assembly, and the valve core assembly is subjected to extrusion force, so that the first flow hole 15 and the second flow hole 16 are communicated;

when the oil pressure is regulated, the inner hexagonal socket head cap set screw 14 on the left side is driven to rotate by the inner hexagonal socket head cap set screw 14, the spring seat 8 on the left end is driven to move rightward along the spring cylinder 3 to compress the rectangular spring 17, and the elasticity of the rectangular spring 17 is increased, so that the oil pressure in the first flow hole 15 can be regulated;

the valve core component comprises a one-way valve seat 2, a valve core 4, a filter screen 5, an end cover 6, a first O-shaped ring 9, a first check ring 10, a steel ball 11, a spring 18, a second O-shaped ring 19, a second check ring 20, a first round hole 21, a second round hole 22, a first annular groove 23, a second annular groove 24, a third flow through hole 25, a mounting groove 26, a first through flow cavity 27 and a second through flow cavity 28, wherein the valve core 4 is slidingly connected in the inner cavity of the connecting bolt 1, the left end part of the valve core 4 is fixedly connected with a spring seat 8 at the right end, the left end of the valve core 4 is provided with the first annular groove 23, the second O-shaped ring 19 and the second check ring 20 are sleeved in the first annular groove 23, the second O-shaped ring 19 is positioned at the right side of the second check ring 20, the one-way valve seat 2 is in contact connection with the cavity 29, the left end part of the one-way valve seat 2 is provided with the first through flow cavity 27, the right end part of the one-way valve seat 2 is provided with the second through flow cavity 28, the second through-flow cavity 28 and the first through-flow cavity 27 are respectively communicated with the left end and the right end of the cavity 29, a third through-flow hole 25 is formed in the middle of the one-way valve seat 2, the third through-flow hole 25 is communicated with the first through-flow cavity 27 and the second through-flow cavity 28, the left end of the one-way valve seat 2 is provided with a plurality of first round holes 21 communicated with the cavity 29 and the first through-flow cavity 27, the right end of the one-way valve seat 2 is provided with a plurality of second round holes 22 communicated with the cavity 29 and the second through-flow cavity 28, the left end of the one-way valve seat 2 is provided with a second annular groove 24, the second annular groove 24 is positioned between the first round holes 21 and the second round holes 22, the second annular groove 24 is internally provided with a first O-shaped ring 9 and a first check ring 10, the first O-shaped ring 9 is positioned on the right side of the first check ring 10, the right end of the valve core 4 is embedded into the first through-flow cavity 27, the small diameter part of the right end of the valve core 4 is slidably arranged in the third through-flow hole 25, the right end of the valve core 4 is in contact with the steel ball 11, the steel ball 11 is positioned in the second through-flow cavity 28, the end part of the right end of the one-way valve seat 2 is fixedly connected with the end cover 6, the left end of the end cover 6 is provided with the mounting groove 26, the right end of the spring 18 is embedded into the mounting groove 26 and is fixedly connected with the end cover 6, the left end of the spring 18 is fixedly connected with the steel ball 11, and the filter screen 5 is sleeved at the position where the right end of the one-way valve seat 2 is provided with the second round hole 22;

preferably, a plurality of first round holes 21 are formed at equal intervals;

preferably, the plurality of second round holes 22 are formed at equal intervals;

the left end of the one-way valve seat 2 is provided with a plurality of first round holes 21 which are communicated with the cavity 29 and the first through-flow cavity 27, and the right end of the one-way valve seat 2 is provided with a plurality of second round holes 22 which are communicated with the cavity 29 and the second through-flow cavity 28; the first and second flow holes 15 and 16 can be formed in the shell 7 according to different requirements, and the positions of the first and second flow holes 15 and 16 are flexible, so that the position of the pressure reducing valve is more reasonable;

when the hydraulic pressure is normal, the left end of the valve core 4 of the valve core assembly moves rightwards under the elastic action of the rectangular spring 17, the valve core 4 pushes the steel ball 11 away from the third flow hole 25, the valve core 4 compresses the spring 18, hydraulic oil in the second flow hole 16 enters the second flow through cavity 28 and the mounting groove 26 through the filter screen 5 and the second round hole 22, flows into the first flow through cavity 27 through the third flow hole 25, and finally flows out of the first flow through hole 15 through the first round hole 21;

when the hydraulic force borne by the valve core 4 is greater than the spring force of the rectangular spring 17, the valve core 4 moves leftwards against the spring force of the rectangular spring 17, the right end of the valve core 4 is separated from the steel ball 11, and the steel ball 11 moves leftwards under the elastic action of the spring 18 until the steel ball 11 blocks the third flow hole 25, so that the communication between the first flow hole 15 and the second flow hole 16 is cut off;

the first O-shaped ring 9 and the first check ring 10 increase the air tightness between the one-way valve seat 2 and the shell 7, so that hydraulic oil in the second flow hole 16 is prevented from directly entering the first flow hole 15 through a gap between the one-way valve seat 2 and the shell 7, and the second O-shaped ring 19 and the second check ring 20 increase the air tightness between the valve core 4 and the one-way valve seat 2, so that the hydraulic oil is prevented from entering the spring cylinder 3;

the third flow holes 25 with different diameters can be formed according to different requirements, the plug-in type pressure reducing valve is small in size, can be used when space is tense, and is convenient to store.

In some embodiments, as shown in fig. 1-5, as a preferred embodiment of the present utility model, it is preferable that the left side of the steel ball 11 is tapered;

the tightness between the steel ball 11 and the third through-hole 25 is increased.

In some embodiments, as shown in fig. 1 to 5, as a preferred embodiment of the present utility model, it is preferable that the right end of the third flow through hole 25 is a conical hole.

The above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims (10)

1. Cartridge formula relief pressure valve, including casing (7), its characterized in that:

the novel valve is characterized in that a cavity (29) is formed in the left end of the shell (7), a first flow hole (15) is formed in the front end of the shell (7), a second flow hole (16) is formed in the right end of the shell (7), the first flow hole (15) and the second flow hole (16) are respectively communicated with the front end and the right end of the cavity (29), the right end of the connecting bolt (1) is embedded into the cavity (29) and is in threaded connection with the shell (7), the left end of the connecting bolt (1) is embedded into a groove of the spring cylinder (3) and is fixedly connected with the spring cylinder (3), a valve core assembly is connected in an inner cavity of the connecting bolt (1), an oil inlet end and an oil outlet end of the valve core assembly are respectively communicated with the left end and the right end of the cavity (29), and an elastic adjusting assembly is connected with the left end of the spring cylinder (3).

2. The cartridge pressure reducing valve according to claim 1, wherein the first and second flow holes (15, 16) are circular holes.

3. The cartridge type pressure reducing valve according to claim 2, wherein a washer (13) is sleeved at a lateral portion of the connecting bolt (1), and the washer (13) is in contact with a protruding portion of the connecting bolt (1) and a side wall of the housing (7).

4. The cartridge-type pressure reducing valve according to claim 3, wherein the elastic adjusting component comprises a spring seat (8), an M8 nut (12), an inner hexagonal cylindrical head set screw (14) and a rectangular spring (17), the two spring seats (8) are located in grooves at the left end and the right end of the spring cylinder (3) and are in sliding connection with the spring cylinder (3), the M8 nut (12) is in contact with the left end of the spring cylinder (3), the M8 nut (12) is sleeved on the inner hexagonal cylindrical head set screw (14) and is in threaded connection with the inner hexagonal cylindrical head set screw (14), the right end of the inner hexagonal cylindrical head set screw (14) is in threaded connection with the spring seat (8) at the left end, the rectangular spring (17) is located in the grooves of the spring cylinder (3), two ends of the rectangular spring (17) are fixedly connected with the spring seat (8), the spring seat (8) at the right end is in contact with the left end of the connecting bolt (1), and the right end (8) is in contact with the valve core component.

5. The cartridge-type pressure reducing valve according to claim 4, wherein the valve core assembly comprises a one-way valve seat (2), a valve core (4), a filter screen (5), an end cover (6), a first O-shaped ring (9), a first check ring (10), a steel ball (11), a spring (18), a second O-shaped ring (19), a second check ring (20), a first round hole (21), a second round hole (22), a first annular groove (23), a second annular groove (24), a third flow hole (25), a mounting groove (26), a first through-flow cavity (27) and a second through-flow cavity (28), the valve core (4) is slidingly connected in the inner cavity of the connecting bolt (1), the left end part of the valve core (4) is fixedly connected with a spring seat (8) at the right end, the first annular groove (23) is arranged at the left end of the valve core (4), the second O-shaped ring (19) and the second check ring (20) are sleeved in the first annular groove (23), the one-way valve seat (2) is connected with the cavity (29) in a contact manner, the first through-flow cavity (28) is arranged at the left end part (2), the second through-flow cavity (28) and the first through-flow cavity (27) are respectively communicated with the left end and the right end of the cavity (29), a third through-flow hole (25) is formed in the middle of the one-way valve seat (2), the third through-flow hole (25) is communicated with the first through-flow cavity (27) and the second through-flow cavity (28), the left end of the one-way valve seat (2) is provided with a plurality of first round holes (21) communicated with the cavity (29) and the first through-flow cavity (27), the right end of the one-way valve seat (2) is provided with a plurality of second round holes (22) communicated with the cavity (29) and the second through-flow cavity (28), the left end of the one-way valve seat (2) is provided with a second annular groove (24), the second annular groove (24) is positioned between the first round holes (21) and the second round holes (22), a first O-shaped ring (9) and a first check ring (10) are sleeved in the second annular groove (24), the right side of the first check ring (10), the right end of the valve core (4) is embedded into the first through-flow cavity (27), the right end of the valve core (4) is provided with a plurality of second round holes (22), the right end of the valve core (4) is connected with the steel ball (11), the small end of the valve core (4) is connected with the small end cap (2), the small end ball (2) is connected with the end cap (11), the left end of the end cover (6) is provided with a mounting groove (26), the right end of the spring (18) is embedded into the mounting groove (26) and is fixedly connected with the end cover (6), the left end of the spring (18) is fixedly connected with the steel ball (11), and the filter screen (5) is sleeved at the right end of the one-way valve seat (2) and provided with a second round hole (22).

6. The cartridge type pressure reducing valve according to claim 5, wherein the diameter of the steel ball (11) is larger than the diameter of the third flow hole (25).

7. The cartridge type pressure reducing valve according to claim 6, wherein the plurality of first circular holes (21) are opened at equal intervals.

8. The cartridge type pressure reducing valve according to claim 7, wherein the plurality of second circular holes (22) are opened at equal intervals.

9. Cartridge pressure reducing valve according to claim 8, characterized in that the left side of the steel ball (11) is conical.

10. The cartridge type pressure reducing valve according to claim 9, wherein the right end of the third flow hole (25) is a conical hole.