CN204300040U - Screw thread inserting type cutting type relief valve - Google Patents

Screw thread inserting type cutting type relief valve Download PDF

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Publication number
CN204300040U
CN204300040U CN201420757798.XU CN201420757798U CN204300040U CN 204300040 U CN204300040 U CN 204300040U CN 201420757798 U CN201420757798 U CN 201420757798U CN 204300040 U CN204300040 U CN 204300040U
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Prior art keywords
valve
female connector
face
plug
aforesaid
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CN201420757798.XU
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朱国胜
卞亚琴
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NINGBO KETA HYDRAULICS CO Ltd
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NINGBO KETA HYDRAULICS CO Ltd
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Abstract

A kind of screw thread inserting type cutting type relief valve comprises valve pocket, main valve plug, female connector, guide valve seat, the first spring, spring seat, plug screw, the second spring and pilot valve, the axial hollow of valve pocket, and there is the first hydraulic fluid port, the second hydraulic fluid port and the first sidewise hole, main valve plug can be axially movably located in aforesaid valve pocket, and this main valve plug front end axis and side direction offer damping hole and the second sidewise hole respectively; Female connector is located at the rearward end of aforementioned valve pocket and axial hollow, and this female connector has the 3rd sidewise hole; Guide valve seat is located at the front end of aforementioned female connector and axial hollow shape becomes cavity; Plug screw built-in length adjustably can be located at the rearward end of aforementioned female connector; Pilot valve is located in the gap between aforesaid spring seat front-end face and guide valve seat and front-end face is positioned at the cavity of guide valve seat.Compared with prior art, the utility model has the advantage of: compact overall structure, after relief valve unlatching can be met, the requirement that pressure setting pressure that is complete and valve is irrelevant.

Description

Screw thread inserting type cutting type relief valve
Technical field
The utility model relates to a kind of relief valve, is applied to overload protection in hydraulic system.
Background technique
In general hydraulic system, be element each in protective system, prevent excessive pressure damages, all can use an overload relief valve; Namely after the pressure of entrance reaches setting value, valve all can open overflow.Can the referenced patent number Chinese invention patent " parallel valve port type overflow valve " (Authorization Notice No. is CN1177161C) that is ZL02145385.3, can also application reference number be 201010551494.4 Chinese invention patent application " a kind of Novel overflow valve " (application publication number CN102062244A), application number is Chinese invention patent application " a kind of buffer relief valve for oil hydraulic motor " (application publication number is CN1022235393A) of 201110232247.2 for another example.
Use general relief valve, system horsepower depends on the pressure after valve unlatching, but after customer requirement relief valve is opened, pressure setting pressure that is complete and valve has nothing to do, and wishes directly to observe induced pressure and avoid system for no reason to consume horsepower; For this reason, above-mentioned relief valve all can not meet usage requirement.
Model utility content
Technical problem to be solved in the utility model is provide a kind of relief valve to open for the above-mentioned state of the art after, the screw thread inserting type cutting type relief valve that pressure setting pressure that is complete and valve is irrelevant.
The utility model solves the problems of the technologies described above adopted technological scheme: a kind of screw thread inserting type cutting type relief valve, is characterized in that comprising
Valve pocket, axial hollow, and there is the first hydraulic fluid port, the second hydraulic fluid port and the first sidewise hole,
Main valve plug, can axially movably be located in aforesaid valve pocket, and this main valve plug front end axis and side direction offer damping hole and the second sidewise hole respectively;
Female connector, be located at the rearward end of aforementioned valve pocket and axial hollow, this female connector has the 3rd sidewise hole;
Guide valve seat, is located at the front end of aforementioned female connector and axial hollow shape becomes cavity;
First spring, is located at aforementioned main valve plug inner chamber and ear end face and aforementioned guide valve seat front-end face offset;
Spring seat, is located in aforementioned female connector;
Plug screw, built-in length adjustably can be located at the rearward end of aforementioned female connector;
Second spring, be located in aforementioned female connector and front end and spring seat rear end and offset, the front-end face of rear end and aforementioned plug screw offsets; And
Pilot valve, is located in the gap between aforesaid spring seat front-end face and guide valve seat and front-end face is positioned at the cavity of guide valve seat;
Under non-load condition, aforesaid main valve plug keeps motionless, and aforesaid first hydraulic fluid port and the second hydraulic fluid port block, and aforesaid first sidewise hole and the second sidewise hole block;
After load under state, aforesaid pilot valve is first opened, and fluid flows out from the 3rd sidewise hole after damping hole; Then, aforesaid main valve plug is opened, and aforesaid first hydraulic fluid port and the second hydraulic fluid port communicate, and aforesaid first sidewise hole communicates with the second sidewise hole, and last aforementioned main valve plug ear end face and guide valve seat front-end face offset, and aforesaid pilot valve is closed.
As preferably, described pilot valve is a spheroid, and accordingly, the front-end face of described spring seat has the built-in groove that is suitable for spheroid assembling.
Form boss in the middle part of described main valve plug front-end face, form triangular groove in this boss, described damping hole is then opened in this triangular groove.When push rod acts on main valve plug, main valve plug inner chamber fluid communicates with front end through triangular groove, and push rod can be opened by mechanical driven main valve plug.
The oil outlet of the inner chamber damping hole of described main valve plug forms a groove.Groove can be used for realizing fluid moment hydraulic power balance.
As preferably, the described oblique layout of the second hydraulic fluid port, the first described hydraulic fluid port axially takes shape in the front port of valve pocket.
Further, the front end inner chamber perisporium of described female connector forms spacing shoulder, and accordingly, the rear end of described guide valve seat extends back the protuberance offseted with aforementioned spacing shoulder, and the front-end face of described guide valve seat seals with the ear end face of female connector and contacts.
The front port inwall of described valve pocket has a built-in groove, is provided with one and can limits the jump ring that main valve plug continues to move forward in this built-in groove.
Compared with prior art, the utility model has the advantage of: compact overall structure, after relief valve unlatching can be met, the requirement that pressure setting pressure that is complete and valve is irrelevant.
Accompanying drawing explanation
Structural representation when Fig. 1 is embodiment's non-load.
Fig. 2 is main valve plug enlarged diagram in Fig. 1.
Fig. 3 is main valve plug perspective view in Fig. 2.
Fig. 4 is pilot valve opening type structural representation.
Fig. 5 is main valve plug and pilot valve structural representation when all opening.
Fig. 6 is structural representation after steady state.
Embodiment
Below in conjunction with accompanying drawing, embodiment is described in further detail the utility model.
As shown in Figure 1, screw thread inserting type cutting type relief valve in the present embodiment comprises valve pocket 1, main valve plug 3, female connector 2, guide valve seat 5, first spring 31, spring seat 6, plug screw 8, second spring 9 and pilot valve 7, the axial hollow of valve pocket 1, there is the first hydraulic fluid port 1a, the second hydraulic fluid port 2a and the first sidewise hole 1b, the oblique layout of second hydraulic fluid port 2a, the first hydraulic fluid port 1a axially takes shape in the front port of valve pocket 1.
Shown in composition graphs 2 and Fig. 3, main valve plug 3 can be axially movably located in aforesaid valve pocket 1, and this main valve plug 3 front end axis and side direction offer damping hole 32 and the second sidewise hole 2b respectively; Form boss 36 in the middle part of main valve plug 3 front-end face, form triangular groove 34 in this boss 36, damping hole 32 is opened in this triangular groove 34.The oil outlet of the inner chamber damping hole 32 of main valve plug 3 forms a groove 33, forms circular groove 35, a second sidewise hole 2b and then take shape in circular groove 35 in the middle part of main valve plug 3.So in an unloaded condition, main valve plug 3 and valve pocket 1 can realize cylndrical surface sealing.
Female connector 2 is located at the rearward end of valve pocket 1 and axial hollow, and this female connector 2 has the 3rd sidewise hole 3b; Guide valve seat 5 is located at the front end of female connector 2 and axial hollow shape becomes cavity; Main valve plug 3 inner chamber is located at by first spring 31 and ear end face and guide valve seat 5 front-end face offset; Spring seat 6 is located in female connector 2; Plug screw 8 built-in length adjustably can be located at the rearward end of female connector 2; Second spring 9 is located in female connector 2 and front end and spring seat 6 rear end and is offseted, and the front-end face of rear end and plug screw 8 offsets.
Pilot valve 7 is located in the gap between spring seat 6 front-end face and guide valve seat 5 and front-end face is positioned at the cavity of guide valve seat 5, and pilot valve 7 is a spheroid, and the front-end face of spring seat 6 has the built-in groove that is suitable for spheroid assembling.
The front end inner chamber perisporium of female connector 2 forms spacing shoulder, and accordingly, the rear end of guide valve seat 5 extends back the protuberance 51 offseted with spacing shoulder, and the front-end face of guide valve seat 5 seals with the ear end face of female connector 2 and contacts.
The front port inwall of valve pocket 1 has a built-in groove, is provided with one and can limits the jump ring 37 that main valve plug 3 continues to move forward in this built-in groove.
Working principle:
As shown in Figure 1, under non-load condition (i.e. original state), pilot valve 7 is not opened, and main valve plug 3 pressure reduction is that the zero, first hydraulic fluid port 1a and the second hydraulic fluid port 2a block, and the second hydraulic fluid port takes back fuel tank.
As shown in Figure 4, when the damping hole 32 of fluid through main valve plug 3 enters main valve plug 3 and arrive pilot valve 7 front end, along with inlet pressure gradually reach the setting pressure of valve time, pilot valve 7 is opened, pilot valve 7 opens moment, fluid is through the 3rd sidewise hole 3b oil sump tank, and main valve plug 3 chamber pressure declines rapidly.
As shown in Figure 5, due to the existence of main valve plug damping hole 32, now there is pressure reduction in main valve plug 3 front end and main valve plug 3 inner chamber, and main valve plug 3 is opened rapidly, and main valve plug 3 is opened.
As shown in Figure 6, main valve plug 3 opens moment, because main valve plug 3 sidewise hole is connected with valve pocket 1 sidewise hole, namely main valve plug 3 chamber pressure equals the second hydraulic fluid port 2a pressure, main valve plug 3 chamber pressure is close to zero, then main valve plug 3 is unrestrictedly opened, and develops with guide valve seat 5 end face, and main valve plug 3 forefront pressure is induced pressure.Because pilot valve 7 forefront pressure is close to zero, pilot valve 7 is closed, so now main valve plug 3 is opened pressure and valve setting pressure and is had nothing to do, namely have nothing to do with the second spring 9, thus after meeting relief valve unlatching, the designing requirement that pressure setting pressure that is complete and valve is irrelevant, is convenient to observe induced pressure, also reduces energy consumption simultaneously.

Claims (7)

1. a screw thread inserting type cutting type relief valve, is characterized in that comprising
Valve pocket, axial hollow, and there is the first hydraulic fluid port, the second hydraulic fluid port and the first sidewise hole,
Main valve plug, can axially movably be located in aforesaid valve pocket, and this main valve plug front end axis and side direction offer damping hole and the second sidewise hole respectively;
Female connector, be located at the rearward end of aforementioned valve pocket and axial hollow, this female connector has the 3rd sidewise hole;
Guide valve seat, is located at the front end of aforementioned female connector and axial hollow shape becomes cavity;
First spring, is located at aforementioned main valve plug inner chamber and ear end face and aforementioned guide valve seat front-end face offset;
Spring seat, is located in aforementioned female connector;
Plug screw, built-in length adjustably can be located at the rearward end of aforementioned female connector;
Second spring, be located in aforementioned female connector and front end and spring seat rear end and offset, the front-end face of rear end and aforementioned plug screw offsets; And
Pilot valve, is located in the gap between aforesaid spring seat front-end face and guide valve seat and front-end face is positioned at the cavity of guide valve seat;
Under non-load condition, aforesaid main valve plug keeps motionless, and aforesaid first hydraulic fluid port and the second hydraulic fluid port block, and aforesaid first sidewise hole and the second sidewise hole block;
After load under state, aforesaid pilot valve is first opened, and fluid flows out from the 3rd sidewise hole after damping hole; Then, aforesaid main valve plug is opened, and aforesaid first hydraulic fluid port and the second hydraulic fluid port communicate, and aforesaid first sidewise hole communicates with the second sidewise hole, and last aforementioned main valve plug ear end face and guide valve seat front-end face offset, and aforesaid pilot valve is closed.
2. screw thread inserting type cutting type relief valve according to claim 1, is characterized in that described pilot valve is a spheroid, and accordingly, the front-end face of described spring seat has the built-in groove that is suitable for spheroid assembling.
3. screw thread inserting type cutting type relief valve according to claim 1, it is characterized in that forming boss in the middle part of described main valve plug front-end face, form triangular groove in this boss, described damping hole is then opened in this triangular groove.
4. screw thread inserting type cutting type relief valve according to claim 3, is characterized in that the oil outlet of the inner chamber damping hole of described main valve plug forms a groove.
5. screw thread inserting type cutting type relief valve according to claim 1, is characterized in that the described oblique layout of the second hydraulic fluid port, and the first described hydraulic fluid port axially takes shape in the front port of valve pocket.
6. screw thread inserting type cutting type relief valve according to claim 1, it is characterized in that the front end inner chamber perisporium of described female connector forms spacing shoulder, accordingly, the rear end of described guide valve seat extends back the protuberance offseted with aforementioned spacing shoulder, further, the front-end face of described guide valve seat seals with the ear end face of female connector and contacts.
7. screw thread inserting type cutting type relief valve according to claim 1, is characterized in that the front port inwall of described valve pocket has a built-in groove, is provided with one and can limits the jump ring that main valve plug continues to move forward in this built-in groove.
CN201420757798.XU 2014-12-05 2014-12-05 Screw thread inserting type cutting type relief valve Active CN204300040U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420757798.XU CN204300040U (en) 2014-12-05 2014-12-05 Screw thread inserting type cutting type relief valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420757798.XU CN204300040U (en) 2014-12-05 2014-12-05 Screw thread inserting type cutting type relief valve

Publications (1)

Publication Number Publication Date
CN204300040U true CN204300040U (en) 2015-04-29

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105135013A (en) * 2015-09-30 2015-12-09 暴晗 Safety pilot valve
CN105971959A (en) * 2016-06-25 2016-09-28 玉环县现代工具有限公司 Differential pressure type unloading safety valve
CN106351906A (en) * 2016-11-15 2017-01-25 湖南凯恩利液压机械制造有限公司 Overflow valve
CN108150472A (en) * 2017-12-27 2018-06-12 邵立坤 A kind of buffer overflow valve
CN108150473A (en) * 2017-12-27 2018-06-12 邵立坤 A kind of buffer overflow valve
CN108278393A (en) * 2018-01-22 2018-07-13 宁波海宏液压有限公司 A kind of slide valve type guide one-way overflow valve
CN111102263A (en) * 2020-01-22 2020-05-05 浙江高宇液压机电有限公司 Pilot-operated overflow valve with unloading control channel

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105135013A (en) * 2015-09-30 2015-12-09 暴晗 Safety pilot valve
CN105971959A (en) * 2016-06-25 2016-09-28 玉环县现代工具有限公司 Differential pressure type unloading safety valve
CN106351906A (en) * 2016-11-15 2017-01-25 湖南凯恩利液压机械制造有限公司 Overflow valve
CN106351906B (en) * 2016-11-15 2019-02-15 湖南凯恩利液压机械制造有限公司 A kind of overflow valve
CN108150472A (en) * 2017-12-27 2018-06-12 邵立坤 A kind of buffer overflow valve
CN108150473A (en) * 2017-12-27 2018-06-12 邵立坤 A kind of buffer overflow valve
CN108150473B (en) * 2017-12-27 2019-07-23 凯文斯流体控制(江苏)有限公司 A kind of buffer overflow valve
CN108150472B (en) * 2017-12-27 2019-11-15 浙江百思达水暖股份有限公司 A kind of buffer overflow valve
CN108278393A (en) * 2018-01-22 2018-07-13 宁波海宏液压有限公司 A kind of slide valve type guide one-way overflow valve
CN108278393B (en) * 2018-01-22 2019-06-14 宁波海宏液压有限公司 A kind of slide valve type guide one-way overflow valve
CN111102263A (en) * 2020-01-22 2020-05-05 浙江高宇液压机电有限公司 Pilot-operated overflow valve with unloading control channel

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