CN217735214U

CN217735214U - Hydraulic door closer

Info

Publication number: CN217735214U
Application number: CN202220927212.4U
Authority: CN
Inventors: 尚宇航; 田晓光; 黄旭东
Original assignee: Henan Haige Technology Co ltd
Current assignee: Henan Haige Technology Co ltd
Priority date: 2022-04-21
Filing date: 2022-04-21
Publication date: 2022-11-04
Anticipated expiration: 2032-04-21

Abstract

The invention discloses a hydraulic door closer, comprising: the piston comprises a throttle valve rod, a piston cylinder body and a piston arranged in the cylinder body; the throttle valve rod is arranged on the upper section of the piston cylinder body, one part of the throttle valve rod is arranged in the cylinder body, and the throttle valve rod is provided with a thumb wheel; the top end of the cylinder body is sequentially provided with a throttle valve gland and a throttle valve seat, the throttle valve gland is fixed on the cylinder body, and the throttle valve seat is fixed on the throttle valve rod; the lower end of the throttle valve gland is provided with a hemispherical groove, and the top end of the throttle valve seat is provided with a hemispherical convex surface matched with the hemispherical groove; a one-way valve body is pressed into the piston, and a throttling hole is formed in the one-way valve body. The invention can continuously increase or decrease, effectively improve the linear adjustment of the hydraulic oil, and improve the use stability of the door closer when the viscosity of the hydraulic oil changes in different regions and seasons.

Description

Hydraulic door closer

Technical Field

The invention provides an automatic closing device for doors and windows, in particular to a hydraulic control door closer.

Background

Door closers are usually installed on doors in large office areas (commercial businesses, shopping malls, supermarkets, etc.) to control the closing speed. The door closer is generally in a structure combining a spring and a hydraulic oil way, the door closing force and speed of the door closer are adjusted by adjusting the torque or pressure of a spring, and fine adjustment is realized by adjusting the flow speed and flow of the hydraulic oil way. The viscosity of the hydraulic oil is greatly influenced by the temperature, and particularly when the environment is lower than minus 10 ℃, the viscosity is obviously increased, and the flow speed is obviously slowed down. In order to adapt to the change of the environmental temperature, a flow regulating valve is often arranged on a hydraulic circuit of the door closer and comprises a valve seat and a valve rod structure, the valve rod generally adopts a conical structure, and the flow rate of hydraulic oil are controlled by moving the relative position of the valve rod and the valve seat, so that the door closing speed of the door closer is finely adjusted.

The thickness of the throttle valve rod on the throttle valve device of the existing hydraulic door closer is fixed, the tapered or cylindrical tapered surface is processed, the throttle valve rod is fixed, the size of the throttle hole is also fixed, so the gap between the throttle valve rod and the throttle hole is fixed, when the environmental temperature changes due to different regions and seasons, the viscosity of hydraulic oil changes, the position between the tapered surface and the throttle hole is realized by moving the throttle rod up and down, the flow rate of the hydraulic oil is controlled, and the door closing speed of the door closer is finely adjusted.

However, the adjustment mode cannot be effectively adjusted under the condition of extreme severe weather, taking the hydraulic oil No. 26 of Shell as an example, the viscosity at 20 ℃ is 61.87, the viscosity at 10 ℃ is 166.06,0 ℃ is 199.09, and the viscosity at 10 ℃ is 417.82, so that the change of the viscosity of the hydraulic oil with the temperature is small above 0 ℃, and the viscosity is almost linearly increased after the temperature is lower than 0 ℃, therefore, the adjustment amount of the traditional throttle lever is limited when the temperature difference is large, and the opening and closing speed of the door closer cannot be effectively controlled in certain regions or extreme weather (mainly low temperature). A table of the temperature as a function of viscosity for 26# Shell hydraulic oil is shown in FIG. 3.

Disclosure of Invention

The invention aims to provide a hydraulic door closer, which aims to overcome the defect of small oil path adjusting range of the existing door closer, reduce the influence of external temperature change on the door closer, improve the linear adjusting capacity of the door closer and meet the applicability of the door closer in an extreme temperature environment.

In order to achieve the purpose, the invention adopts the technical scheme that: a hydraulic door closer comprising: the piston comprises a throttle valve rod, a piston cylinder body and a piston arranged in the cylinder body; the throttle valve rod is arranged on the upper section of the piston cylinder body, one part of the throttle valve rod is arranged in the cylinder body, and the throttle valve rod is provided with a thumb wheel; the top end of the cylinder body is sequentially provided with a throttle valve gland and a throttle valve seat, the throttle valve gland is fixed on the cylinder body, and the throttle valve seat is fixed on the throttle valve rod; the lower end of the throttle valve gland is provided with a hemispherical groove, and the top end of the throttle valve seat is provided with a hemispherical convex surface adapted to the hemispherical groove; a one-way valve body is pressed in the piston, and a throttling hole is formed in the one-way valve body.

The throttle valve gland and the cylinder body are concentrically installed at the upper end of the cylinder body through threaded connection, and the throttle valve seat is fixed on the throttle valve rod through a threaded structure.

The throttle valve rod and the throttle valve gland, the throttle valve seat and the throttle hole of the one-way valve body on the piston are in concentric structure.

According to the technical scheme, when the piston moves up and down, the accuracy of the relative positions of the throttle valve rod and the throttle hole of the check valve at the upper end of the piston can be ensured, the concentric state is always kept, and the adjustment smoothness is improved.

The lower section of the throttle valve rod is provided with a throttle valve sleeve, and an elastically deformable object is arranged between the throttle valve sleeve and the throttle valve rod.

The elastic deformable object is an elastic sealing ring, and comprises a first sealing ring and a second sealing ring which are used for flexible sealing.

The elastically deformable object is a steel umbrella-shaped structure.

The invention can continuously increase or decrease, effectively improve the linear adjustment of the hydraulic oil, and improve the use stability of the door closer when the viscosity of the hydraulic oil changes in different regions and seasons.

Adopt the choke valve device of above-mentioned structure, when the great hydraulic oil viscosity that arouses of temperature variation changes in winter and summer, can be through the regulation of throttle valve rod, make the clearance between throttle valve rod and the single valve body orifice grow or diminish linearly, the cooperation that the hemisphere convex surface of the throttle valve gland that is equipped with the hemisphere recess and the throttle valve seat of below is adapted, thereby the throttle valve will have better centering nature and make throttle valve and orifice keep higher concentricity thereby make the door closing speed of door closer stabilize in certain interval, thereby the use stationarity of door closer has been improved greatly, region difference in temperature application scope has been strengthened.

Drawings

FIG. 1 is a schematic structural view of the present invention in use;

FIG. 2 shows a part of the structure of the present invention;

FIG. 3, the change of the viscosity of hydraulic oil of Shell 26# hydraulic oil along with the change of temperature;

in the figure: 1. a thumb wheel; 2. a throttle valve gland; 3. a throttle valve seat; 4. a throttle valve sleeve; 5. a check valve body; 6. a throttle valve seat seal ring; 7. a throttle lever; 8. an orifice; 9. piston cylinder 10, piston.

Detailed Description

The specific structure and method of use of the invention are described in the following examples in conjunction with the figures.

As shown in the attached drawing, the utility model relates to a novel choke valve device on door closer, a serial communication port, including installing the upper end thumb wheel at throttle valve rod 7, have throttle valve gland 2 with half spherical groove below the thumb wheel, throttle valve pressure is installed on piston cylinder 9, have below the throttle valve gland on the throttle valve seat 3 throttle valve seats have with half spherical convex surface that half spherical groove suited, have throttle valve cover 4 suits in the throttle valve rod outside below the throttle valve seat, have throttle valve seat elastic seal or have elastic deformation's part 6 between throttle valve cover and the throttle valve rod inner, impressed above the piston has check valve body 5. The middle of the one-way valve body is provided with a throttling hole 8.

When the throttle valve device is used, the piston is arranged in the piston cylinder, and the throttle valve device is arranged at the upper end of the piston cylinder. When stirring the thumb wheel and doing anticlockwise rotation, throttle valve rod rebound, there is the part throttle valve rod upper end to be screw thread structure, with the screw hole cooperation in the middle of the throttle valve seat, at this moment, throttle valve cover 4 can extrude throttle valve seat elastic seal circle, and throttle valve seat seal circle can be because of the inflation grow of extrusion. At this time, the gap between the throttle lever and the throttle hole is reduced, and the piston is provided with a cam groove, so that when the piston moves upward, the flow rate of the hydraulic oil passing through the gap is reduced. At the moment, the moving speed of the piston also becomes slow, the piston moves upwards under the thrust of the spring when the door is closed, and hydraulic oil in the upper end cavity of the piston cylinder can be extruded to flow to the lower end of the cavity through a gap between the throttle valve rod and the throttle hole; the door closing speed of the door closer also becomes slower. The piston is provided with a spiral groove, the spiral groove is fixed on an upper column of a positioning hole of the cylinder body through a pin, and a sliding shaft sleeve is sleeved on the pin. The middle center pin is rotatory when opening the door, drives the piston rotation, and center pin and piston lean on slidable spline connection to be special to pass the moment of torsion, because the piston is through the pin location on the locating hole of cylinder body, so the piston can slide down along with the spline of center pin, so compression spring, the kinetic energy release of the storage of spring becomes the potential energy when the door is closed, so the door can self-closing.

On the contrary, when the dial wheel is toggled to rotate clockwise, the sealing ring of the throttle valve seat becomes small again, and the gap between the throttle valve rod and the throttle hole becomes large. When the door is closed, the piston moves upwards, and the flow speed of hydraulic oil passing through the gap becomes fast. At this time, the moving speed of the piston is also increased, and the door closing speed of the door closer is also increased accordingly.

Therefore, when the viscosity of hydraulic oil is changed due to large temperature change in winter and summer in the door closer, the gap between the throttle valve rod and the single valve body can be linearly increased or decreased through the adjustment of the throttle valve device. Thereby can control the flow of hydraulic oil flow to the cavity lower extreme in the upper end cavity of piston cylinder, the door closing speed of door closer just can guarantee to stabilize in certain interval like this, improves the stability of use of door closer greatly.

Because the lower part of the throttle valve gland is a hemispherical concave surface, and the upper part of the throttle valve seat is a hemispherical convex surface. When screwing up the choke valve gland, the concave surface of choke valve gland can extrude the convex surface of throttle valve seat, has the effect of free aligning, centering like this, guarantees the centering nature of throttle valve rod.

The throttle valve seat 3 with the hemispherical convex surface matched with the hemispherical groove means that the shape, the size and the like of the hemispherical groove and the hemispherical convex surface are matched with each other, and the throttle valve seat can be installed together in a butt joint mode to achieve the use performance.

It also has a first sealing ring 11 and a second sealing ring 12 for flexible sealing.

Because the throttle valve gland 2 with the hemispherical groove is matched with the hemispherical convex head of the lower throttle valve seat 3 in a proper way, the concentricity of oil to the throttle hole can be freely and finely adjusted.

In the traditional center-hung door closer, an oil way control part mainly controls an oil way by a fixed clearance between a cylindrical throttle rod, commonly called a needle valve, and a throttle hole of a one-way valve, and because the viscosity change of pressure oil is very obvious when the temperature is lower, and because the throttle rod is made of a rigid material, the adjustment amount is limited.

The throttle valve rod described in the patent adjusts the elastic material of extrusion cover on the throttle valve through the screw thread and makes its inflation diameter grow to make former rigidity throttle valve produce the change in the diameter, come the clearance between the throttle valve and the last orifice of check valve, thereby realize oil circuit control.

Claims

1. A hydraulic door closer comprising: the piston comprises a throttle valve rod, a piston cylinder body and a piston arranged in the cylinder body; the piston is characterized in that the throttle valve rod is arranged on the upper section of the piston cylinder body, one part of the throttle valve rod is arranged in the cylinder body, and the throttle valve rod is provided with a thumb wheel; the top end of the cylinder body is sequentially provided with a throttle valve gland and a throttle valve seat, the throttle valve gland is fixed on the cylinder body, and the throttle valve seat is fixed on the throttle valve rod; the lower end of the throttle valve gland is provided with a hemispherical groove, and the top end of the throttle valve seat is provided with a hemispherical convex surface adapted to the hemispherical groove; a one-way valve body is pressed in the piston, and a throttling hole is formed in the one-way valve body.

2. The hydraulic door closer according to claim 1, wherein the throttle cover is mounted on the upper end of the cylinder body concentrically with the cylinder body by screw-coupling, and the throttle valve seat is fixed to the throttle lever by screw-coupling.

3. The hydraulic door closer according to claim 1, wherein the throttle lever is concentric with the throttle gland, the throttle valve seat and the throttle orifice of the check valve body on the piston.

4. The hydraulic door closer according to claim 1, wherein a throttle sleeve is provided at a lower portion of the throttle lever, and an elastically deformable member is provided between the throttle sleeve and the throttle lever.

5. The hydraulic door closer of claim 4, wherein the resiliently deformable member is a resilient seal comprising a first seal and a second seal for flexible sealing.

6. The hydraulic door closer of claim 4, wherein the elastically deformable article is a steel umbrella.