Temperature-controlled regulating check valve and use thereof

Abstract

A temperature-controlled regulating check valve, comprising a valve body (1). A one-way flow channel is provided within the valve body, a valve ball (2) is provided at one end of the one-way flow channel, and several thermoplastic protrusions (21) protrude from the surface of the valve ball. Further disclosed is a door closer comprising the temperature-controlled regulating check valve. The temperature-controlled regulating check valve has a simple structure. At normal temperatures, the protrusions on the surface of the valve ball are in a soft elastic state, a fluid presses the valve ball, and the protrusions elastically deform and are used in combination with the one-way flow channel as a check valve. At low temperatures, the valve ball and the protrusions on the surface thereof harden, and do not easily deform even when pressed by the fluid, and a gap is present between the valve ball and the one-way flow channel to form a compensatory oil return flow channel. The compensatory oil return flow channel compensates for reduced flow in an external oil return flow channel caused by the increased viscosity of hydraulic oil at lower temperatures.

Description

Temperature control and regulating one-way valve and its application Technical Field

[0001] The present application relates to the technical field of door closers, and in particular to a temperature-controlled one-way valve and its application. Background Art

[0002] A door closer is a spring-like hydraulic device attached to the door head. When the door is opened, a piston is driven by a rocker arm to compress the spring. The spring then releases the piston, pushing it back to automatically close the door. This acts like a spring-loaded door, ensuring that the door accurately and promptly closes to its initial position after opening. A one-way valve within the piston allows the hydraulic oil to flow during the door opening process. During closing, the one-way flow channel is sealed, allowing return flow only through the door closer's return oil channel. This prevents the door from closing too quickly, potentially damaging the door leaf and door frame, and potentially causing injuries such as pinching. However, the viscosity of the hydraulic oil increases with decreasing temperature, and the viscosity increases dramatically below zero degrees Celsius. The flow rate of the hydraulic oil in the return oil channel decreases rapidly, and during closing, the elastic force of the spring forces the hydraulic oil to flow, causing the door leaf to close extremely slowly. Therefore, improvements are needed.

[0003] Utility Model Content

[0004] The purpose of the utility model is to provide a temperature control and regulating one-way valve and its application to overcome the deficiencies in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] The present application discloses a temperature-controlled and adjustable one-way valve, including a valve body, wherein a one-way flow channel is arranged in the valve body along its axial direction, the one-way flow channel includes a spring limiting groove, a connecting flow channel and a valve ball flow channel arranged in sequence, the diameters of the spring limiting groove and the valve ball flow channel are both larger than the connecting flow channel, a valve ball is arranged in the valve ball flow channel, a limiting structure for limiting the movement of the valve ball is provided on the opening side of the valve ball flow channel, a conical surface structure corresponding to the valve ball is provided at one end of the valve ball flow channel close to the connecting flow channel, and a plurality of thermoplastic protrusions protrude from the surface of the valve ball.

[0007] Furthermore, in the above-mentioned temperature control and adjustment one-way valve, the protrusion and the valve ball are formed in one piece.

[0008] Furthermore, in the above-mentioned temperature control and regulating one-way valve, the valve ball includes a rigid ball and an elastic sleeve covering the surface of the rigid ball, and the protrusion is integrally formed on the surface of the elastic sleeve.

[0009] Furthermore, in the above-mentioned temperature control and regulating one-way valve, the limiting structure is a plurality of bosses fixed to the inner wall of the valve ball flow channel, and adjacent bosses are arranged at intervals.

[0010] Furthermore, in the above-mentioned temperature control and regulating one-way valve, the limiting structure is a filter screen fixed to the opening end of the valve ball flow channel.

[0011] Furthermore, in the above-mentioned temperature control and adjustment one-way valve, the protrusions are raised points evenly distributed on the surface of the valve ball.

[0012] Furthermore, in the above-mentioned temperature control and adjustment one-way valve, the protrusions are ridges staggeredly arranged on the surface of the valve ball.

[0013] The present application also discloses a door closer, which utilizes the above-mentioned temperature control and adjustment one-way valve as a piston.

[0014] Compared with the prior art, the temperature-controlled and adjustable one-way valve has a simple structure. The protrusions on the surface of the valve ball are in a soft elastic state at room temperature. When the fluid squeezes the valve ball, the protrusions elastically deform and are combined with the one-way flow channel to act as a one-way valve. At low temperatures, the valve ball and the protrusions on its surface both harden and are not easily deformed by fluid squeezing. A gap exists between the valve ball and the one-way flow channel to form a compensating return oil flow channel to compensate for the reduction in flow in the external return oil flow channel due to increased viscosity of the hydraulic oil caused by lowering temperature. The door closer using the temperature-controlled and adjustable one-way valve can be used in a low-temperature environment. After the valve ball and the protrusions harden, a gap exists between the valve ball and the one-way flow channel to form a compensating return oil flow channel to cooperate with the return oil flow channel of the door closer to reduce the reduction in flow caused by increased viscosity of the hydraulic oil caused by lowering temperature, thereby ensuring the closing time of the door closer. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] FIG1 is a schematic structural diagram of a temperature control and regulating one-way valve according to a specific embodiment of the present invention.

[0017] FIG2 is a schematic structural diagram of a temperature control and regulating one-way valve according to another specific embodiment of the present invention.

[0018] FIG3 is a schematic cross-sectional view of a valve ball according to a specific embodiment of the present invention.

[0019] FIG4 is a schematic structural diagram of a valve ball according to a specific embodiment of the present invention. DETAILED DESCRIPTION

[0020] The following is a detailed description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] As shown in Figures 1 to 4, a temperature-controlled and adjustable one-way valve includes a valve body 1, in which a one-way flow channel is arranged along the axial direction. The one-way flow channel includes a spring limiting groove 11, a connecting flow channel 12 and a valve ball flow channel 13 arranged in sequence. The diameters of the spring limiting groove 11 and the valve ball flow channel 13 are both larger than the connecting flow channel 12. A valve ball 2 is arranged in the valve ball flow channel 13, and a limiting structure 3 for limiting the movement of the valve ball 2 is provided on the opening side of the valve ball flow channel 13. A conical surface structure corresponding to the valve ball 2 is provided at one end of the valve ball flow channel 13 close to the connecting flow channel 12, and a plurality of thermoplastic protrusions 21 protrude from the surface of the valve ball 2.

[0022] In this technical solution, the valve ball can move back and forth with the hydraulic oil in the valve ball flow channel. When the hydraulic oil flows in the forward direction (flowing along the spring limit groove, the connecting flow channel and the valve ball flow channel in sequence), the limit structure ensures that the valve ball does not flow out with the hydraulic oil; when the hydraulic oil flows in the reverse direction, the hydraulic oil squeezes the valve ball to the conical surface structure, and the protrusion and the valve ball are squeezed and deformed to completely fit the conical surface structure, thereby blocking the connecting flow channel, that is, the one-way flow channel is completely blocked; as the external operating environment temperature decreases, the viscosity of the hydraulic oil gradually increases, and at the same time, the valve ball and the protrusions on its surface gradually harden, that is, the valve ball cannot completely fit into the conical surface structure, and part of the hydraulic oil flows along the gap between the valve ball and the conical surface structure; using The door closer of this temperature-controlled and adjustable one-way valve can ensure the closing speed even when encountering extremely low temperature weather or being used in low-temperature areas in the north, while not affecting the use at normal temperature and requiring no manual adjustment. The temperature-controlled and adjustable one-way valve has a simple structure, and the protrusions on the surface of the valve ball are in a soft elastic state at normal temperature. The hydraulic oil in the door closer squeezes the valve ball, and the protrusions elastically deform, and are combined with the one-way flow channel to act as a one-way valve. At low temperatures, the valve ball and the protrusions on its surface both become hard, and are not easily deformed by hydraulic oil squeezing. A gap exists between the valve ball and the one-way flow channel, which cooperates with the return oil flow channel of the door closer to ensure the closing effect and reduce the impact of long closing time caused by changes in the viscosity of the hydraulic oil caused by temperature changes.

[0023] Exemplarily, referring to FIG. 1 to FIG. 3 , the protrusion 21 and the valve ball 2 are formed integrally.

[0024] In this technical solution, the valve ball and the protrusion are integrally formed from rubber or other thermal materials through conventional injection molding and other processes. They are soft elastic materials at room temperature. When squeezed by hydraulic oil, they will elastically deform and fit completely to the conical structure. As the temperature decreases, the valve ball and the protrusion gradually harden. When the hydraulic oil is squeezed, the deformation of the valve ball and the protrusion gradually decreases, and a gap is generated between the valve ball and the conical structure. The gap gradually increases as the temperature decreases.

[0025] Exemplarily, as shown in FIG. 3 , the valve ball 2 includes a rigid ball 22 and an elastic sleeve 23 covering the surface of the rigid ball, and the protrusion 21 is integrally formed on the surface of the elastic sleeve 23 .

[0026] In this technical solution, a conventional steel ball can be used as the rigid ball, and its diameter is not less than the diameter of the connecting flow channel, so as to avoid the occurrence of adverse situations such as excessive deformation of the valve ball and embedding into the connecting flow channel.

[0027] For example, referring to FIG. 1 , the limiting structure 3 is a plurality of bosses fixed to the inner wall of the valve ball flow channel 13 , and adjacent bosses are spaced apart.

[0028] In this technical solution, three to six bosses are provided at the open end of the valve ball flow channel through conventional riveting or welding processes to prevent the valve ball from flowing out of the valve ball flow channel along with the hydraulic oil. Adjacent bosses are arranged at intervals, that is, there are gaps between the bosses, and the gap distance between the bosses is much larger than the size of the protrusions, so as to prevent the valve ball from blocking the valve ball flow channel when the valve ball is attached to all the bosses at the same time, and does not hinder the flow of hydraulic oil.

[0029] Exemplarily, as shown in FIG. 2 , the limiting structure 3 is a filter screen fixed to the open end of the valve ball flow channel 13 .

[0030] In this technical solution, after the valve ball is placed in the valve ball flow channel, a filter is fixed at the open end of the valve ball flow channel by laser welding or other means, which can limit the range of movement of the valve ball without affecting the flow of hydraulic oil.

[0031] Exemplarily, referring to FIG. 1 to FIG. 3 , the protrusions 21 are convex points uniformly distributed on the surface of the valve ball 2 .

[0032] In this technical solution, the cross-section of the protrusion is a conventional arc or frustum structure. At room temperature, it can be squeezed and deformed by hydraulic oil, so that the valve ball can fit completely on the conical surface structure. As the temperature decreases, the hardness gradually increases, so that a gap exists between the valve ball and the conical surface structure.

[0033] Exemplarily, as shown in FIG. 4 , the protrusions 21 are ridges staggeredly arranged on the surface of the valve ball 2 .

[0034] In this technical solution, the cross-section of the ridge is a conventional arc-shaped structure, which can be squeezed and deformed by hydraulic oil, so that the valve ball can fit completely on the conical surface structure. As the temperature decreases, the hardness gradually increases, so that a gap exists between the valve ball and the conical surface structure.

[0035] A door closer includes a conventional housing, a rocker arm, a guide rail and other mechanisms. A piston cavity is provided in the housing. The temperature control and adjustment one-way valve mentioned above is slidably provided in the piston cavity as a piston. When the door is opened, the door leaf drives the valve body in the door closer to squeeze the spring through conventional structures such as the rocker arm. The space on the side where the spring is located becomes smaller, and the hydraulic oil flows to the side away from the spring. The limiting structure ensures that the valve ball does not flow out with the hydraulic oil; when the door is closed, the spring releases its elastic potential energy, pushing the temperature control and adjustment one-way valve to reset, and the hydraulic oil flows to the side where the spring is located, squeezing the valve ball into the conical structure. The protrusion and the valve ball are squeezed and deformed to fit completely. The valve ball is in a conical structure, and part of the hydraulic oil flows back along the gap between the valve ball and the conical structure to compensate for the reduced flow rate of the return oil channel due to the increased viscosity of the hydraulic oil, thereby ensuring the closing speed. The door closer using this temperature control one-way valve can ensure the closing speed even if it encounters extremely low temperature weather or is used in low temperature areas in the north, without affecting the use at normal temperature and without manual adjustment.

[0036] To sum up, the temperature control and adjustment one-way valve has a simple structure. The protrusion on the surface of the valve ball is in a soft elastic state at room temperature. The fluid squeezes the valve ball, and the protrusion is elastically deformed. It is combined with the one-way flow channel to act as a one-way valve. At low temperatures, the valve ball and the protrusion on its surface become hard, and the fluid is not easily deformed by squeezing. There is a gap between the valve ball and the one-way flow channel, forming a compensating return oil flow channel to compensate for the reduction in flow in the external return oil flow channel due to the increase in hydraulic oil viscosity caused by the decrease in temperature. The door closer using the temperature control and adjustment one-way valve can be used in a low-temperature environment. After the valve ball and the protrusion harden, there is a gap between the valve ball and the one-way flow channel to form a compensating return oil flow channel, which cooperates with the return oil flow channel of the door closer to reduce the reduction in flow caused by the increase in hydraulic oil viscosity caused by the temperature drop, thereby ensuring the closing time of the door closer.

[0037] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0038] The above is only a specific implementation method of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A temperature control and regulating one-way valve, characterized in that: It includes a valve body, a one-way flow channel is arranged in the valve body along its axial direction, the one-way flow channel includes a spring limiting groove, a connecting flow channel and a valve ball flow channel which are arranged in sequence, the diameters of the spring limiting groove and the valve ball flow channel are larger than the connecting flow channel, a valve ball is arranged in the valve ball flow channel, a limiting structure for limiting the movement of the valve ball is arranged on the opening side of the valve ball flow channel, a conical surface structure corresponding to the valve ball is arranged at one end of the valve ball flow channel close to the connecting flow channel, and a plurality of thermoplastic protrusions protrude from the surface of the valve ball.

2. The temperature control and regulating one-way valve according to claim 1, characterized in that: The protrusion and the valve ball are formed integrally.

3. The temperature control and regulating one-way valve according to claim 1, characterized in that: The valve ball comprises a rigid ball and an elastic sleeve covering the surface of the rigid ball, and the protrusion is integrally formed on the surface of the elastic sleeve.

4. The temperature control and regulating one-way valve according to claim 1, characterized in that: The limiting structure is a plurality of bosses fixed to the inner wall of the valve ball flow channel, and adjacent bosses are arranged at intervals.

5. The temperature control and regulating one-way valve according to claim 1, characterized in that: The limiting structure is a filter screen fixed to the opening end of the valve ball flow channel.

6. The temperature control and regulating one-way valve according to claim 1, characterized in that: The protrusions are convex points evenly distributed on the surface of the valve ball.

7. The temperature control and regulating one-way valve according to claim 1, characterized in that: The protrusions are ridges arranged alternately on the surface of the valve ball.

8. A door closer, characterized in that: It comprises the temperature control and regulating one-way valve as described in any one of claims 1 to 7.

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