CN208804250U - One kind pushing away lock speed regulation valve arrangement - Google Patents

Abstract

The utility model discloses one kind to push away lock speed regulation valve arrangement, including ontology and throttling pillar, the lower end of the ontology is equipped with the crossover sub being tightly connected, the crossover sub lower end is equipped with the first recirculation hole, the side of ontology is equipped with the second recirculation hole, the guide sleeve being slidably matched with throttling pillar is equipped in the ontology, the throat bushing with the sealing cooperation of first-class through-hole wall is equipped in the crossover sub, throat bushing center is equipped with throttle orifice, and the lower end of the throttling pillar is equipped with the cone seal section cooperated with throttle orifice.The utility model is intended to provide a kind of sealing effect and preferably pushes away lock speed regulation valve arrangement.

Description

One kind pushing away lock speed regulation valve arrangement

Technical field

The utility model belongs to speed governing valve field more particularly to one kind pushes away lock speed regulation valve arrangement.

Background technique

It is unidirectional to disclose a kind of two-way such as Chinese Patent Application No. CN201711429371.1 for current existing speed governing valve Speed governing valve, including valve body, the spring base of the first hydraulic fluid port of band are provided with the second hydraulic fluid port on the peripheral wall of valve body；Valve seat；Lining with through-hole Set；Pressure compensation spool is set in the periphery of bushing and can slide up and down along bushing, the macropore of the stepped hole of pressure compensation spool Portion forms through-flow chamber, is provided with through flow hole on the peripheral wall of bushing；First spring cavity, the first spring cavity is interior to be equipped with the first spring, bushing Peripheral wall on be also provided with damping hole, second spring chamber, the intracavitary second spring of second spring, the second hydraulic fluid port and second spring chamber connect It is logical, through-flow slot is provided on valve seat；The throttling valve core that can be slid up and down, the bottom of throttling valve core are provided with adjusting cavity, the week of adjusting cavity Wall is provided with throttling channel；Driving structure, to drive throttling valve core to slide up and down.Existing speed governing valve, valve body and throttling pillar spool Closing face is inclined-plane sealing, can not form effective sealing surface at all, throttling pillar control section is caused to be unable to reach sealing effect, Cause sealability bad.

Utility model content

The utility model is to provide a kind of sealing effect in order to overcome above-mentioned deficiency in the prior art and preferably push away lock Type adjusts the speed valve arrangement.

To achieve the goals above, the utility model uses following technical scheme:

One kind pushing away lock speed regulation valve arrangement, including ontology and throttling pillar, and the lower end of the ontology is equipped with turn being tightly connected Changing-over head, the crossover sub lower end are equipped with the first recirculation hole, and the side of ontology is equipped with the second recirculation hole, is equipped in the ontology The guide sleeve being slidably matched with throttling pillar, the interior throat bushing being equipped with the sealing cooperation of first-class through-hole wall of the crossover sub, Throat bushing center is equipped with throttle orifice, and the lower end of the throttling pillar is equipped with the cone seal section cooperated with throttle orifice.In this way, throttling pillar When mobile to throat bushing, the cone seal section of throttling pillar lower end is entered in the throttle orifice at throat bushing center, the circulation of throttle orifice Area reduces, and is finally reached the effect of control fluid flow rate, forms the effect that speed is adjusted.When in cone seal section and throat bushing When the throttle orifice of the heart contacts sealing, the gradient arc surface sealing that energy shape forms an angle has good sealing effect.

Preferably, the cone seal section includes being raised in the seal boss of throttling pillar lower end and positioned at seal boss The conical surface body at center, the surface of the conical surface body and the inner wall of throttle orifice seal and cooperate, and the seal boss is equipped with and throttling The seal face of bore ends sealing cooperation.Throttling pillar lower end is conical surface body, when conical surface body contacts sealing with the throttle orifice of throat bushing, It is sealed as first.When conical surface body poor sealing, the seal face of seal boss is contacted with throttling bore ends, forms second Road sealing, is effectively ensured sealing effect.

Preferably, the lateral wall of the throat bushing is equipped with locating slot, throat bushing sealing ring is equipped in the locating slot And throat bushing sealing ring is limited into the retainer in locating slot.Cooperated by retainer, sealing ring is reliably limited fixed In the slot of position, when external pressure acts on sealing ring, retainer can guarantee that sealing ring acts on throat bushing and crossover sub simultaneously First-class through-hole wall, reliable and stable sealability is provided.

Preferably, the lower end of the guide sleeve is equipped with limiting section, the limiting section center is equipped with and wears for cone seal section The through-hole crossed, the throttling pillar are equipped with limited step, are equipped with the supporting surface to offset with limited step on the inside of the limiting section.When Throttling pillar screws when moving down, limited step and support face contact on throttling pillar, ensure that the downward adjusting displacement row of throttling pillar Journey prevents throttling pillar from excessively holding out against throat bushing and crossover sub is caused integrally to move down.

Preferably, the top of the ontology is equipped with the adjustment cap for driving throttling pillar rotation, it is equipped in the guide sleeve solid Determine ring, the fixed ring is fixedly connected with guide sleeve, and fixed ring is equipped with internal screw thread, and the throttling pillar is equipped with and screw-internal thread fit External screw thread.

Preferably, the top of the ontology is equipped with positioning round table, the adjustment cap and positioning round table axial sliding fit, The positioning round table is equipped with the rotary table positioning tooth arranged along continuous edge, is equipped on the inside of the adjustment cap and nibbles with rotary table positioning tooth The adjustment cap positioning tooth of conjunction.It generallys use locking cap in the prior art to lock throttling pillar and ontology, when adjusting needs will locking Cap releases and tight state, then starts to adjust, and simultaneously tightly requires to bring compared with great strength to user with rotation locking cap when unlock Use feeling it is poor.Adjustment cap in the application is when adjusting, it is only necessary to by adjustment cap pull-up, adjustment cap positioning tooth and rotary table Positioning tooth is disengaged from, rotation adjustment cap to required position, then is pressed to ontology, makes adjustment cap positioning tooth and rotary table positioning tooth again Secondary engagement, that is, can reach latching purpose, and adjustment process is relatively simple laborsaving.

Preferably, the rotary table positioning tooth and adjustment cap positioning tooth is triangular in shape.Tooth form is triangle, tooth root compared with To be strong, it can prevent Overexertion from tightening the damage caused by tooth and deforming.

Preferably, the bottom of the positioning round table is equipped with the regulating tank and fixing groove coaxially arranged with positioning round table, institute It states regulating tank to be located above fixing groove, the lower end of the adjustment cap is equipped with the limit fastener cooperated with regulating tank or fixing groove.This Sample, adjustment cap are moved up when adjusting, and limit fastener is fallen into regulating tank, is moved down when adjustment cap needs to lock, and limit fastener is fallen Enter into fixing groove, prevent adjustment cap from loosening, improves adjustment cap position stability.

The beneficial effects of the utility model are: (1) throttling pillar and throat bushing use taper sealing, there is automatic-sealed in when adjusting Compensation function adjusts throttling pillar axial direction stroke by continuing when seal degree is inadequate, can achieve enhancing sealing effect Fruit；(2) multistage sealing structure and support construction are used at throttling pillar and throat bushing cooperation sealing, is promoted reliable at throttling pillar sealing Property, it ensure that the functionality of speed governing valve, improve the service performance and quality of product；(3) adjustment cap is adjusted part and is nibbled using tooth Conjunction form, the adjusting for greatly facilitating client use, and tedious steps when saving de-regulation, the formation of tooth engagement can be effectively reduced Because of speed governing valve locking cap loosening situation common caused by shaking, throttling pillar rotation can be effectively prevented, improve the stabilization of speed governing valve Property.

Detailed description of the invention

Fig. 1 is a kind of structural schematic diagram of the utility model；

Fig. 2 is the structural schematic diagram at the utility model adjustment cap；

Fig. 3 is the sealing cooperation schematic diagram of the utility model cone seal section and throat bushing.

In figure: adjustment cap 1, limit fastener 1a, adjustment cap positioning tooth 1b, ontology 2, guide sleeve 2a, through-hole 2b, positioning round table 2c, rotary table positioning tooth 2d, supporting surface 2e, regulating tank 201, fixing groove 202, fixed ring 3, throttling pillar 4, cone seal section 4a, cone Face body 41, seal boss 42, seal face 401, limited step 402, crossover sub 5, retainer 6, throat bushing sealing ring 7, section Stream set 8, throttle orifice 8a, the first recirculation hole 9, the second recirculation hole 10.

Specific embodiment

The utility model is further described with reference to the accompanying drawings and detailed description.

In embodiment as shown in Figure 1, one kind pushes away lock speed regulation valve arrangement, including ontology 2 and throttling pillar 4, under ontology End is equipped with the crossover sub 5 being tightly connected, and crossover sub lower end is equipped with the first recirculation hole 9, and the side of ontology is equipped with the second circulation Hole 10.It is equipped with the guide sleeve 2a being slidably matched with throttling pillar in ontology, is equipped in crossover sub and is sealed with first-class through-hole wall The throat bushing 8 of cooperation, throat bushing center are equipped with throttle orifice 8a, and the lower end of throttling pillar is equipped with the cone seal section cooperated with throttle orifice 4a。

The top of ontology is equipped with the adjustment cap 1 for driving throttling pillar rotation, is equipped with fixed ring 3, the fixed ring in guide sleeve It is fixedly connected with guide sleeve, fixed ring is equipped with internal screw thread, and throttling pillar is equipped with the external screw thread with screw-internal thread fit.As shown in Fig. 2, this The top of body is equipped with positioning round table 2c, adjustment cap and positioning round table axial sliding fit, and positioning round table is equipped with along continuous edge cloth The rotary table positioning tooth 2d set, adjustment cap inside are equipped with the adjustment cap positioning tooth 1b with rotary table positioning tooth engagement.Rotary table positioning tooth and Adjustment cap positioning tooth is triangular in shape.The bottom of positioning round table is equipped with the regulating tank 201 coaxially arranged with positioning round table and fixes Slot 202, regulating tank are located above fixing groove, and the lower end of adjustment cap is equipped with the limit fastener 1a cooperated with regulating tank or fixing groove.

As shown in connection with fig. 3, guide sleeve is structure as a whole with ontology, and the lower end of guide sleeve is equipped with limiting section, limiting section center Equipped with the through-hole 2b passed through for cone seal section, throttling pillar is equipped with limited step 402, and limiting section inside is equipped with and limited step The supporting surface 2e to offset.Cone seal section includes being raised in the seal boss 42 of throttling pillar lower end and positioned at seal boss center Conical surface body 41, the inner wall of the surface of conical surface body and throttle orifice, which seals, to be cooperated, and seal boss is equipped with and throttle orifice end part seal The seal face 401 of cooperation.The lateral wall of throat bushing is equipped with locating slot, and throat bushing sealing ring 7 is equipped in locating slot and is incited somebody to action Throat bushing sealing ring limits the retainer 6 in locating slot.

In actual use, it is rotated by adjustment cap so that throttling pillar also rotates simultaneously, throttling pillar is in rotation process In due to being threadedly engaged generate axial movement.When throttling pillar is mobile to throat bushing, the cone seal section of throttling pillar lower end enters Into the throttle orifice at throat bushing center.The conical surface body of cone seal section contacts sealing with the throttle orifice inner wall of throat bushing, as It seals together.When conical surface body poor sealing, the seal face of seal boss is contacted with throttling bore ends, and it is close to form second Envelope.The circulation area of throttle orifice reduces, and is finally reached the effect of control fluid flow rate.When adjusting, adjustment cap is pulled upwardly, Adjustment cap positioning tooth and rotary table positioning tooth are disengaged from, and rotate adjustment cap, change throttling pillar axial position, adjust throttle orifice aperture Extremely required position, then adjustment cap is pressed to ontology, it engages adjustment cap positioning tooth and rotary table positioning tooth again, tune can be realized Save the locking of cap and ontology.

Claims (8)

1. one kind pushes away lock speed regulation valve arrangement, including ontology (2) and throttling pillar (4), the lower end of the ontology (2) is equipped with sealing and connects The crossover sub (5) connect, crossover sub (5) lower end are equipped with the first recirculation hole (9), and the side of ontology (2) is equipped with second Through-hole (10), characterized in that the guide sleeve (2a) being slidably matched with throttling pillar (4) is equipped in the ontology (2), the conversion connects The throat bushing (8) with the sealing cooperation of the first recirculation hole (9) inner wall is equipped in head (5), throat bushing (8) center is equipped with throttle orifice (8a), the lower end of the throttling pillar (4) are equipped with the cone seal section (4a) cooperated with throttle orifice (8a).

2. one kind according to claim 1 pushes away lock speed regulation valve arrangement, characterized in that the cone seal section (4a) includes The seal boss (42) for being raised in throttling pillar (4) lower end and the conical surface body (41) for being located at seal boss (42) center, the cone The surface of face body (41) and the inner wall of throttle orifice (8a) seal and cooperate, and the seal boss (42) is equipped with holds with throttle orifice (8a) The seal face (401) of portion's sealing cooperation.

3. one kind according to claim 1 pushes away lock speed regulation valve arrangement, characterized in that the lateral wall of the throat bushing (8) It is equipped with locating slot, throat bushing sealing ring (7) are equipped in the locating slot and limits throat bushing sealing ring (7) in locating slot In retainer (6).

4. one kind according to claim 1 or 2 or 3 pushes away lock speed regulation valve arrangement, characterized in that the guide sleeve (2a) Lower end is equipped with limiting section, and the limiting section center is equipped with the through-hole (2b) passed through for cone seal section (4a), the throttling pillar (4) It is equipped with limited step (402), the supporting surface (2e) to offset with limited step (402) is equipped on the inside of the limiting section.

5. one kind according to claim 1 or 2 or 3 pushes away lock speed regulation valve arrangement, characterized in that the top of the ontology (2) Portion is equipped with the adjustment cap (1) for driving throttling pillar (4) rotation, is equipped with fixed ring (3) in the guide sleeve (2a), the fixed ring (3) it is fixedly connected with guide sleeve (2a), fixed ring (3) is equipped with internal screw thread, and the throttling pillar (4) is equipped with outer with screw-internal thread fit Screw thread.

6. one kind according to claim 5 pushes away lock speed regulation valve arrangement, characterized in that the top of the ontology (2) is equipped with Positioning round table (2c), the adjustment cap (1) and positioning round table (2c) axial sliding fit, the positioning round table (2c) are equipped with along side The rotary table positioning tooth (2d) that edge is continuously arranged, the adjustment cap (1) inside are equipped with the adjusting engaged with rotary table positioning tooth (2d) Cap positioning tooth (1b).

7. one kind according to claim 6 pushes away lock speed regulation valve arrangement, characterized in that the rotary table positioning tooth (2d) and Adjustment cap positioning tooth (1b) is triangular in shape.

8. one kind according to claim 6 pushes away lock speed regulation valve arrangement, characterized in that the bottom of the positioning round table (2c) Equipped with the regulating tank (201) and fixing groove (202) coaxially arranged with positioning round table (2c), the regulating tank (201), which is located at, is fixed Above slot (202), the lower end of the adjustment cap (1) is equipped with the limit fastener cooperated with regulating tank (201) or fixing groove (202) (1a).