JPS61182475U

JPS61182475U -

Info

Publication number: JPS61182475U
Application number: JP6722085U
Authority: JP
Priority date: 1985-05-07
Filing date: 1985-05-07
Publication date: 1986-11-14

Description

[Brief explanation of the drawing]

第１図は本考案の第一実施例に係るチエツク弁
付電磁式ポペツト弁を示す断面図、第２図は同弁
を利用した油圧制御回路図、第３図ａは同弁の開
閉に伴う入口側の脈動を示す圧力波形図、第３図
ｂはチエツク弁がない場合における同弁の圧力波
形図、第４図は本考案の第二実施例に係るチエツ
ク弁付電磁式ポペツト弁を示す断面図、第５図は
本考案の第三実施例に係るチエツク弁付電磁式ポ
ペツト弁を利用した油圧制御回路図、第６図ａは
同弁の開閉に伴う出口側の脈動を示す圧力波形図
、第６図ｂはチエツク弁がない場合における同弁
の圧力波形図、第７図は本考案の第四実施例に係
るチエツク弁付電磁式ポペツト弁を利用した油圧
制御回路図、第８図及び第９図は従来の脈動減衰
手段（絞りやアキユムレータ）付開閉弁を利用し
た油圧制御回路図である。１は電磁式ポペツト弁、６は制御部、８は弁室
、９はポペツト（弁体）、１０は入口、１１は出
口、１２は通路、１３は通路、１４はシート面、
１６はコア（操作部材）、１９はソレノイド、２
０は通路、２１は弁室、２２は調整ねじ棒、２３
はシート面、２４はボール、２５はスプリング、
３０は通路、３０ａは入口、３１は通路、３１ａ
は出口、３２は通路、３３は弁室、３４はシート
面、３５は調整ねじ棒、３６はボール、３７はス
プリング、Ｐはポート、Ｒはポート、Ｊ，Ｊ１，
Ｊ２はチエツク弁である。 Fig. 1 is a sectional view showing an electromagnetic poppet valve with a check valve according to the first embodiment of the present invention, Fig. 2 is a hydraulic control circuit diagram using the same valve, and Fig. 3a shows the opening and closing of the valve. A pressure waveform diagram showing pulsation on the inlet side, FIG. 3b is a pressure waveform diagram of the same valve without a check valve, and FIG. 4 shows an electromagnetic poppet valve with a check valve according to the second embodiment of the present invention. 5 is a hydraulic control circuit diagram using an electromagnetic poppet valve with a check valve according to the third embodiment of the present invention, and FIG. 6a is a pressure waveform showing pulsations on the outlet side as the valve opens and closes. Fig. 6b is a pressure waveform diagram of the valve without a check valve, Fig. 7 is a hydraulic control circuit diagram using an electromagnetic poppet valve with a check valve according to the fourth embodiment of the present invention, and Fig. 8 9 and 9 are hydraulic control circuit diagrams using a conventional on-off valve with pulsation damping means (throttle and accumulator). 1 is an electromagnetic poppet valve, 6 is a control unit, 8 is a valve chamber, 9 is a poppet (valve body), 10 is an inlet, 11 is an outlet, 12 is a passage, 13 is a passage, 14 is a seat surface,
16 is a core (operating member), 19 is a solenoid, 2
0 is a passage, 21 is a valve chamber, 22 is an adjustment screw rod, 23
is the seat surface, 24 is the ball, 25 is the spring,
30 is a passage, 30a is an entrance, 31 is a passage, 31a
is an outlet, 32 is a passage, 33 is a valve chamber, 34 is a seat surface, 35 is an adjustment threaded rod, 36 is a ball, 37 is a spring, P is a port, R is a port, J, J1,
J2 is a check valve.

Claims

[Claims for Utility Model Registration] 1. A valve chamber is provided in a main flow path that communicates a fluid inlet and a fluid outlet, and a valve body that opens and closes the main flow path is provided between the valve chamber and a seat surface formed in the valve chamber. In an on-off valve that is housed in a valve chamber and equipped with a control unit that is equipped with an operating member for controlling the opening and closing of the valve body, a bypass flow path that communicates a fluid inlet and a fluid outlet, separate from the main flow path, is connected to the main flow path. 1. An on-off valve with a check valve, which is provided in parallel with a flow path, and has a check valve built into the bypass flow path, which connects both flow paths when the pressure exceeds a set pressure. 2. The on-off valve with a check valve according to claim 1, wherein the control section includes a solenoid and a core as an operating member. 3. The on-off valve with a check valve according to claim 1 of the utility model registration claim, wherein the valve body is a poppet. 4. The on-off valve with a check valve according to claim 1, wherein the check valve allows fluid to flow only in the direction from the main flow path on the inlet side to the main flow path on the outlet side. 5. The on-off valve with a check valve according to claim 1, wherein the check valve allows fluid to flow only in the direction from the outlet side main flow path to the inlet side main flow path. 6 A pair of bypass passages are provided in parallel with the main passage, and one of the bypass passages is equipped with a check valve that allows fluid to flow only in the direction from the main passage on the inlet side to the main passage on the outlet side. , the other bypass flow path is equipped with a check valve as set forth in claim 1 of the utility model registration claim, which incorporates a check valve that allows fluid to flow only in the direction from the outlet side main flow path to the inlet side main flow path. Open/close valve. 7 The check valve has a valve chamber provided in the bypass flow path,
A seat surface formed in the valve chamber, a ball accommodated in the valve chamber that opens and closes the flow path between the seat surface, a spring that presses this ball against the seat surface, and a spring that supports this spring. An on-off valve with a check valve according to claim 1, which is provided with an adjusting threaded rod for changing its elastic force.