CN208431220U - Quantitative hydraulic valve - Google Patents

Abstract

The utility model discloses a kind of quantitative hydraulic valves, including shell；Spool is installed in shell；Spool includes positive spool and reversed spool；Spool is screwed screw rod；The hand of spiral of positive spool and reversed spool is opposite；The screw thread of the screw thread of positive spool and reversed spool is mutually matched and is entrenched togather；It fits on the inside of the edge of the bulge-structure of the thread of spool and the side wall of the shell；There is cavity between the inside of the side wall of the concave structure and shell of the thread of spool；Oil suction chamber is formed between the inside and spool of the antetheca of the shell；Oil outlet chamber is formed between the inside and spool of the rear wall of the shell.The utility model can be used for accurate flow control or pressure.

Description

Quantitative hydraulic valve

Technical field

The utility model relates to the valves for hydraulic control, and in particular to a kind of quantitative hydraulic valve.

Background technique

In the prior art, general use ratio valve controls pressure, flow and the direction of liquid.In the prior art, than Example valve principle be usually give a command signal, carry out power amplification through proportional amplifier, and export in proportion electric current to The proportion electro-magnet of proportioning valve, proportion electro-magnet power output and the position for moving proportional to spool can control liquid stream in proportion Flow and change liquid stream direction.As it can be seen that proportioning valve is throttle-type, i.e., by the position of mobile spool, control valve is opened Degree size controls fluid flow, in the case that aperture is certain, flow and retention mouth both ends pressure difference, oil temperature, by viscosity all There are much relations.So the precision of proportioning valve in the prior art is by temperature, oil pressure, viscosity influence.

Utility model content

In view of the deficiencies of the prior art, the utility model discloses a kind of quantitative hydraulic valves.

The technical solution of the utility model is as follows:

A kind of quantitative hydraulic valve, including shell；Spool is installed in shell；Spool includes positive spool and reversed spool； Spool is screwed screw rod；The hand of spiral of positive spool and reversed spool is opposite；The screw thread of positive spool and reversed The screw thread of spool is mutually matched and is entrenched togather；The side wall of the edge of the bulge-structure of the thread of spool and the shell Inside fits；There is cavity between the inside of the side wall of the concave structure and shell of the thread of spool；The shell Oil suction chamber is formed between the inside and spool of antetheca；Oil outlet chamber is formed between the inside and spool of the rear wall of the shell.

Its further technical solution is that the axial direction of the axial direction of positive spool and reversed spool is parallel to each other.

Its further technical solution is that the screw thread of spool is rectangular thread.

Its further technical solution is that one end of the shell has the entrance being connected to the oil suction chamber；The shell The other end have the outlet being connected to the oil outlet chamber.

Its further technical solution is that the shell is formed by connecting by upper half-shell and housing lower half；The upper half shell Body is shorter in length than the housing lower half；There is the entrance open upwards in one end of the housing lower half；The lower half shell The other end of body has the outlet open upwards.

Its further technical solution is the first spool chamber and the second spool that hollow cylindrical is provided in the shell Chamber；First spool chamber is connected with the side wall of second spool chamber；The reversed spool is placed in first spool In chamber；The forward direction spool is placed in second spool chamber；It is connected in the side wall of the first spool chamber and the second spool chamber The screw thread of place, the screw thread of positive spool and reversed spool is mutually chimeric；The edge of the bulge-structure of the thread of the spool With fit on the inside of the side wall of first spool chamber or second spool chamber.

Its further technical solution is that screw rod one end of the forward direction spool is connected with first by first connecting rod Knob；Screw rod one end of the reversed spool is connected with the second knob by the second connecting rod；First knob and described The lateral surface of second knob has embossing；First knob and second knob are placed in except the shell；When described When the screw thread of the screw thread of positive spool and reversed spool is mutually chimeric, the embossing of first knob and the pressure of second knob Line is mutually chimeric.

Its further technical solution is that the embossing of the lateral surface of first knob and second knob is flat Row lines, and embossing is oriented parallel to the axial direction of spool.

Its further technical solution is that the shell is formed by connecting by upper half-shell and housing lower half；In the lower half There are two positioning grooves for the edge setting of shell one end；The first connecting rod and second connecting rod are respectively placed in two In positioning groove.

The advantageous effects of the utility model are:

The utility model provides one kind can be with accurate flow control or the hydraulic valve of pressure, by two groups of parallel long spools It is formed with shell.When work, two spools are rotated towards each other, and by the cavity of shell and valve core chamber, hydraulic oil is pushed outward, by In the volume of cavity be fixed, so can control the output quantity of hydraulic oil by the revolving speed of control valve core, since spool is long Long enough is spent, oily leakage can be seldom, as long as so the revolving speed of precision control valve core, so that it may the flow of Precise Control of Oil.

Detailed description of the invention

Fig. 1 is the schematic diagram of the utility model.

Fig. 2 is the sectional view of the utility model.

Fig. 3 is the enlarged drawing of part A in Fig. 2.

Fig. 4 is the schematic diagram of shell.

Fig. 5 is the schematic diagram in another direction of shell.

Fig. 6 is the schematic diagram of reversed spool.

Fig. 7 is the schematic diagram of positive spool.

Specific embodiment

Fig. 1 is the schematic diagram of the utility model.Fig. 2 is the sectional view of the utility model.Shown in as shown in Figure 1, Figure 2, quantitative liquid Pressure valve includes shell 5.Spool is installed in shell 5.Spool includes positive spool 4 and reversed spool 3.Spool is screwed Screw rod.In the present embodiment, the screw thread of screw rod is rectangular thread.The hand of spiral phase of positive spool 4 and reversed spool 3 Instead.The screw thread of positive spool 4 and the screw thread of reversed spool 3 be mutually matched it is chimeric, when one of valve core rotation, another valve Core can follow rotation.It fits together on the inside of the edge of the bulge-structure of the thread of spool and the side wall of shell 5.Fig. 3 is The enlarged drawing of part A in Fig. 2.As shown in figure 3, having between the inside of the side wall of the concave structure and shell 5 of the thread of spool Cavity 6.Oil suction chamber 1 is formed between the inside and spool of the antetheca of shell 5.It is formed between the inside and spool of the rear wall of shell 5 Oil outlet chamber 2.

Fig. 4 is the schematic diagram of shell.Fig. 5 is the schematic diagram in another direction of shell.As shown in Fig. 4, Fig. 5.Shell 5 It is formed by connecting by upper half-shell 55 and housing lower half 56.Upper half-shell 55 is shorter in length than housing lower half 56.Due to upper half-shell Existing length difference, the entrance 51 that one end of housing lower half 56 has opening direction upward between 55 and housing lower half 56.Lower half The outlet 52 that the other end of shell 56 has opening direction upward.Enter that is, one end of shell 5 has with what oil suction chamber 1 was connected to Mouth 51.The other end of shell 5 has the outlet 52 being connected to oil outlet chamber 2.There are two fixed for edge setting in 56 one end of housing lower half Position groove 57.

The first spool chamber 53 and the second spool chamber 54 of hollow cylindrical are provided in shell 5.First spool chamber 53 and The adjacent side wall of two spool chambers 54 is connected.Reversed spool 3 is placed in the first spool chamber 53.Positive spool 4 is placed in second In spool chamber 54.It is connected with the side wall of the second spool chamber 54 place in the first spool chamber 53, the screw thread of positive spool 4 and anti- It is mutually matched to the screw thread of spool 3 chimeric.53 inside of edge and the first spool chamber of the bulge-structure of the thread of reversed spool 3 It is affixed and is combined, the inside of the edge of the bulge-structure of the thread of positive spool 4 and the second spool chamber 54 fits one It rises.

Fig. 6 is the schematic diagram of reversed spool.Fig. 7 is the schematic diagram of positive spool.As shown in Figure 6, Figure 7, positive spool 4 Screw rod one end is connected with the first knob 42 by first connecting rod 41.And in the present embodiment, the screw thread of positive spool 4 is around it Axially rotate clockwise.Screw rod one end of reversed spool 3 is connected with the second knob 32 by the second connecting rod 31.And in this reality It applies in example, the screw thread of reversed spool 3 rotates counterclockwise around its axial direction.Namely the screw thread side of positive spool 4 and reversed spool 3 To opposite.The lateral surface of first knob 42 and the second knob 32 has embossing, embosses as parallel lines, and the direction embossed is parallel In the axial direction of spool.First knob 42 and the second knob 32 are located at the outside of shell 5.When the screw thread and reversing valve of positive spool 4 When the screw thread of core 3 is mutually chimeric, the embossing of the first knob 42 and the second knob 32 is mutually chimeric.In conjunction with Fig. 4, when reversed spool 3 It is placed in the first spool chamber 53, when positive spool 4 is placed in the second spool chamber 54, first connecting rod 41 and the second connecting rod 42 are respectively placed in two positioning grooves 57.

Since positive spool 4 and reversed spool 3 are fitted closely by thread with shell 5, positive spool 4 and reversing valve Be also between core 3 it is close chimeric, then combine Fig. 2 can be seen that two spools are static do not rotate when, oil suction chamber 1 arrives oil outlet chamber 2 Between, be it is obstructed, hydraulic oil can not flow to oil outlet chamber 2 from oil suction chamber 1.

And when positive spool 4 and reversed spool 3 rotate towards each other, the cavity 6 between shell and spool can be from oil suction chamber 1 One movement to oil outlet chamber 2, then 6 meeting of cavity when filling hydraulic oil in oil suction chamber 1, between shell 5 and spool It is full of hydraulic oil from oil suction chamber 1, then as the rotation of spool, from a movement toward oil outlet chamber 2 of oil suction chamber 1, most After be moved to oil outlet chamber 2, the hydraulic oil of the inside of the cavity 6 between shell 5 and spool is just discharged into oil outlet chamber 2, realizes liquid Pressure oil shifts the function of oil outlet chamber 2 onto from oil suction chamber 1.Since the volume of cavity 6 between shell 5 and spool is fixed, so logical The revolving speed for crossing control screw rod, can control hydraulic oil from oil suction chamber 1 to the flow of oil outlet chamber 2, to realize the accurate of flow Control.

Due to valve core length long enough, the leakage of hydraulic oil can be seldom, so the requirement of actual processing precision is dropped significantly It is low, if rationally designing the size of spool so that the volume of the cavity 6 between shell 5 and spool is small as far as possible, then revolving speed not It, can be flow control to very small value, to realize the control of tiny flow quantity in the case where reduction.Improve precision.Phase Instead, the volume of the cavity 6 between shell 5 and spool can also be done greatly, realizes that big flow accurately controls, therefore, this is practical new Type provides a technical solution very wide with flow-control scope.

Above-described is only preferred embodiments of the present invention, and the utility model is not limited to above embodiments.It can To understand, what those skilled in the art directly exported or associated under the premise of not departing from the spirit and design of the utility model Oher improvements and changes are considered as being included within the scope of protection of this utility model.

Claims (9)

1. a kind of quantitative hydraulic valve, which is characterized in that including shell (5)；Shell is equipped with spool in (5)；Spool includes forward direction Spool (4) and reversed spool (3)；Spool is screwed screw rod；The screw thread side of positive spool (4) and reversed spool (3) To opposite；The screw thread of positive spool (4) and the screw thread of reversed spool (3) are mutually matched and are entrenched togather；The thread of spool The edge of bulge-structure and the side wall of the shell (5) on the inside of fit；The concave structure of the thread of spool with it is described There are cavity (6) between the inside of the side wall of shell (5)；Oil suction chamber is formed between the inside and spool of the antetheca of the shell (5) (1)；Oil outlet chamber (2) are formed between the inside and spool of the rear wall of the shell (5).

2. quantitative hydraulic valve as described in claim 1, which is characterized in that the axial direction and reversed spool of positive spool (4) (3) axial direction is parallel to each other.

3. quantitative hydraulic valve as described in claim 1, which is characterized in that the screw thread of spool is rectangular thread.

4. quantitative hydraulic valve as described in claim 1, which is characterized in that one end of the shell (5) has and the oil suction chamber (1) entrance (51) being connected to；The other end of the shell (5) has the outlet (52) being connected to the oil outlet chamber (2).

5. quantitative hydraulic valve as claimed in claim 4, which is characterized in that the shell (5) is by upper half-shell (55) and lower half Shell (56) is formed by connecting；The upper half-shell (55) is shorter in length than the housing lower half (56)；The housing lower half (56) One end have the upwards open entrance (51)；The other end of the housing lower half (56) have upwards it is open it is described go out Mouth (52).

6. quantitative hydraulic valve as described in claim 1, which is characterized in that be provided with hollow cylindrical in the shell (5) First spool chamber (53) and the second spool chamber (54)；The side wall phase of first spool chamber (53) and second spool chamber (54) Connection；The reversed spool (3) is placed in first spool chamber (53)；The forward direction spool (4) is placed in described second In spool chamber (54)；In place of the first spool chamber (53) is connected with the side wall of the second spool chamber (54), the spiral shell of positive spool (4) The screw thread of line and reversed spool (3) is mutually chimeric；The edge of the bulge-structure of the thread of the spool and first spool It fits on the inside of the side wall of chamber (53) or second spool chamber (54).

7. quantitative hydraulic valve as described in claim 1, which is characterized in that screw rod one end of the forward direction spool (4) passes through First connecting rod (41) is connected with the first knob (42)；Screw rod one end of the reversed spool (3) passes through the second connecting rod (31) the second knob (32) are connected with；The lateral surface of first knob (42) and second knob (32) has embossing；Institute It states the first knob (42) and second knob (32) is placed in except the shell (5)；When the screw thread of the positive spool (4) When mutually chimeric with the screw thread of reversed spool (3), the embossing of first knob (42) and the embossing of second knob (32) It is mutually chimeric.

8. quantitative hydraulic valve as claimed in claim 7, which is characterized in that first knob (42) and second knob (32) embossing of lateral surface is parallel lines, and embossing is oriented parallel to the axial direction of spool.

9. quantitative hydraulic valve as claimed in claim 7, which is characterized in that the shell (5) is by upper half-shell (55) and lower half Shell (56) is formed by connecting；There are two positioning groove (57) for edge setting in the housing lower half (56) one end；Described first Connecting rod (41) and second connecting rod (31) are respectively placed in two positioning grooves (57).