CN202360824U

CN202360824U - Novel bidirectional throttle valve

Info

Publication number: CN202360824U
Application number: CN201120521021XU
Authority: CN
Inventors: 刘连权
Original assignee: TIANJIN HAINA JIUZHOU HEADING MACHINE MANUFACTURING Co Ltd
Current assignee: Tianjin Weili Engineering Jack Co., Ltd.
Priority date: 2011-12-14
Filing date: 2011-12-14
Publication date: 2012-08-01
Anticipated expiration: 2021-12-14

Abstract

The utility model discloses a novel bidirectional throttle valve, which has small volume and is easy to install. A valve body (1) is cannular; two valve seats are arranged in the valve body (1) and are also cannular; the two valve seats are respectively screwed into the left side and the right side of the valve body (1) by an outer thread and an inner thread; a check valve plug (5) is arranged in No.1 valve seat (2); the inner end of the check valve plug (5) is conical; the internal diameter of the inner end of the valve seat on which the check valve plug (5) is positioned is less than the diameter of a non-conical section; the check valve plug (5) is longitudinally and loosely matched with the valve seat; the middle of the check valve plug (5) is provided with a radial through hole (6); the outer end of the check valve plug (5) is provided with a center hole (11); the center hole (11) and the radial through hole (6) are through; a bidirectional valve plug (3) is arranged in the No.2 valve seat (3); two ends of the bidirectional valve plug (3) are both conical; a throttle hole (8) is arranged out of the cone of the check valve plug (5); two ends of the throttle hole (8) are respectively communicated with the gap and the space; and the conical surfaces of two ends of a bidirectional valve plug (7) are both provided with longitudinal throttle holes (9).

Description

Novel bidirectional throttling valve

Technical field

The utility model relates to a kind of throttle valve, relates in particular to a kind of novel bidirectional throttling valve.

Background technique

Throttle valve is through changing throttling cross section or the chock length valve with the control fluid flow.Become one-way throttle valve with throttle valve and one-way valve parallel connection are then capable of being combined.Throttle valve and one-way throttle valve are easy flow control valves, and in hydraulic system with constant displacement pump, throttle valve and relief valve cooperate, and can form three kinds of throttle grverning systems, i.e. in-line throttle grverning system, oil circuit throttle grverning system and by-pass throttle speed control system.Throttle valve does not have flow reverse feedback function, and it is unstable to compensate the speed that caused by load variations, and it is little or to the less demanding occasion of speed stability generally only to be used for load variations.In hydraulic system,, mostly adopt two one-way throttle valves oppositely to contact, thereby realize the setting of positive and negative both direction fluid flow at present, to change the advance and retreat speed of executive component for adapting to the round throttle grverning requirement of executive component.Though adopt two one-way throttle valves to carry out differential concatenation, can realize the advance and retreat speed of setting, change executive component such as the oil cylinder of positive and negative both direction fluid flow.But install owing to need two one-way throttle valves to carry out differential concatenation, make that the volume of throttle valve is big, it is more to take up room.Owing to need two one-way throttle valves to carry out the differential concatenation installation, installation and maintenance are all cumbersome again.

Summary of the invention

According to above technical problem, the utility model provides the novel bidirectional throttling valve that a kind of volume is little, be prone to installation, is made up of valve body (1), a valve seat (2), No. two valve seats (3), circumferential step (4), nonreturn valve core (5), radial direction through hole (6), two-way spool (7), restriction (8), vertical restriction (9), hexagon nut (10), center hole (11); It is characterized in that said valve body is a tubular, two valve seats are arranged in it, two valve seats also are tubular; Be processed with outside thread on the cylindrical of valve seat, be processed with internal thread on the interior circle of valve body, two valve seats screw in the valve body left and right sides by outer, internal thread respectively; The interior circular diameter of two valve seat intermediate sections is greater than the interior circular diameter at its two ends, and interior round two forms circumferential step, wherein in a valve seat nonreturn valve core is arranged; The nonreturn valve core inner end is conical, and inner end internal diameter of its place valve seat is less than its non-conical section diameter, nonreturn valve core and place valve base chamber vertically between be and become flexible shape and cooperate; Leave the gap between the interior circle of its cylindrical and respective valve seat, there is radial direction through hole the centre of nonreturn valve core, and there is center hole its outer end; This center hole and radial direction through hole connect; In No. two valve seats two-way spool is arranged, its two ends are taper shape, and there is restriction the conical outside of nonreturn valve core; The restriction two ends are communicated with said gap and spacing respectively, on the conical surface at two-way spool two ends vertical restriction are arranged all.

The beneficial effect of the utility model is: the bidirectional throttling valve of the utility model contains a valve body, and two valve seats are installed in the valve body, is useful on the nonreturn valve core that forms one-way valve in the valve seat, is useful on the two-way spool that forms two-way valve in another valve seat.Utilize a valve to replace two traditional one-way valves, the volume of valve body is little, occupy little space, and is easy for installation and maintenance.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Embodiment

According to shown in Figure 1, said valve body (1) is a tubular, and two valve seats are arranged in it; Two valve seats also are tubular, and the outer end of two valve seats all has is convenient to the hexagon nut (10) that cooperates with inner hexagon spanner, is processed with outside thread on the cylindrical of valve seat; Be processed with internal thread on the interior circle of valve body, two valve seats screw in the valve body (1) by outer, female end opposite end, and the interior circular diameter of two valve seat intermediate sections is greater than the interior circular diameter at its two ends; Interior circle two forms circumferential step (4), and nonreturn valve core (5) is arranged in the valve seat (2), and this nonreturn valve core (5) is cylindric; Its outer end diameter is greater than the outer end internal diameter of place valve seat, and the nonreturn valve core inner end is conical, and the inner end internal diameter of its place valve seat is less than its non-conical section diameter; Nonreturn valve core (5) and place valve base chamber vertically between be loosening shape and cooperate, leave the gap between the interior circle of its cylindrical and respective valve seat, there is radial direction through hole (6) centre of nonreturn valve core (5); There is center hole (11) its outer end, and this center hole (11) connects with radial direction through hole (6).Two-way spool (7) is arranged in No. two valve seats (3); This two-way spool (7) also is cylindric; Its two ends are taper shape, and the outside of its two conical section offsets with circumferential step (4) edge that belongs to circle two in the valve seat respectively, and leaves spacing between its inner end and nonreturn valve core (5); There is restriction (8) the conical outside of nonreturn valve core (5); Restriction (8) two ends are communicated with said gap and spacing respectively, on the conical surface at two-way spool (7) two ends vertical restriction (9) are arranged all, with the corresponding intermediate section of two vertical restrictions (9) one side be the plane; Wherein restriction (8) flow area on the nonreturn valve core (5) is gone up the flow area of vertical restriction (9) less than two-way spool (7), and the flow area of the radial direction through hole (6) on the nonreturn valve core (5) and center hole (11) is greater than the flow area of vertical restriction on the two-way spool (7).Utilize a valve to replace two traditional one-way valves, the volume of valve body (1) is little, occupy little space, and is easy for installation and maintenance.

Claims

1. a novel bidirectional throttling valve is made up of valve body (1), a valve seat (2), No. two valve seats (3), circumferential step (4), nonreturn valve core (5), radial direction through hole (6), two-way spool (7), restriction (8), vertical restriction (9), hexagon nut (10), center hole (11), it is characterized in that said valve body (1) is a tubular; Two valve seats are arranged in it, and two valve seats also are tubular, are processed with outside thread on the cylindrical of valve seat; Be processed with internal thread on the interior circle of valve body, two valve seats screw in valve body (1) left and right sides by outer, internal thread respectively, and the interior circular diameter of two valve seat intermediate sections is greater than the interior circular diameter at its two ends; Interior circle two forms circumferential step (4); Wherein in the valve seat (2) nonreturn valve core (5) is arranged, nonreturn valve core (5) inner end is conical, and the inner end internal diameter of its place valve seat is less than its non-conical section diameter; Nonreturn valve core (5) and place valve base chamber vertically between be loosening shape and cooperate; Leave the gap between the interior circle of its cylindrical and respective valve seat, there is radial direction through hole (6) centre of nonreturn valve core (5), and there is center hole (11) its outer end; This center hole (11) connects with radial direction through hole (6); Two-way spool (3) is arranged in No. two valve seats (3), and its two ends are taper shape, and there is restriction (8) the conical outside of nonreturn valve core (5); Restriction (8) two ends are communicated with said gap and spacing respectively, on the conical surface at two-way spool (7) two ends vertical restriction (9) are arranged all.