Safety valve structure and door closer

Abstract

The utility model discloses a safety valve structure and a door closer which are multipurpose, wide in applicable product range and stable in function. The safety valve structure comprises a valve body and a valve element arranged on the valve body in a sleeving mode, a hollow cavity is formed in the valve element, an oil inlet and an oil overflowing opening which are communicated with the hollow cavity are formed in the two ends of the valve element respectively, a ball, a pin pressing spring and a pin column are sequentially arranged in the hollow cavity, the pin column is used for limiting and abutting against the pin pressing spring, and the ball pressing spring is connected with the ball. The pressing pin spring is used for abutting against the ball to block the oil inlet, and therefore an oil way can only push the ball from the oil inlet in a one-way mode to compress the pressing pin spring and then enter the hollow cavity, and water cannot flow out of the oil inlet. The utility model is applied to the technical field of door closers.

Description

Technical Field

[0001] The utility model is applied to the technical field of door closers and relates to a safety valve structure and a door closer. Background Art

[0002] At present, door closer products of different types, functions and force levels adopt completely different safety valve structures. In order to meet product requirements, different valve body sizes need to be used, and springs of different sizes are equipped to meet different door closer force levels. As a result, there are many types of components, which is not conducive to the standardization and serialization development of products. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a safety valve structure and a door closer that are multi-purpose, applicable to a wide range of products and have stable functions.

[0004] The technical solution adopted by the utility model is as follows: the utility model includes a safety valve structure and a door closer, the safety valve structure includes a valve body and a valve core sleeved on the valve body, a hollow cavity is arranged inside the valve core, and an oil inlet and an oil overflow port connected to the hollow cavity are respectively arranged at two ends of the valve core, a ball, a pressure pin spring and a pin are arranged in sequence in the hollow cavity, the pin is used for limiting the position of the pressure pin spring, and the pressure pin spring is used for resisting the ball to block the oil inlet, so that the oil circuit can only enter the hollow cavity in one direction from the oil inlet after pushing the ball to compress the pressure pin spring, and cannot flow out from the oil inlet.

[0005] Furthermore, the valve core includes a valve column body, the hollow cavity is arranged inside the valve column body, a valve sleeve head is arranged at the front end of the valve column body, the valve body is provided with a first inner cavity body adapted to the valve column body, and the diameter of the valve sleeve head is larger than the aperture of the first inner cavity body.

[0006] Furthermore, a sealing ring is arranged between the valve body and the valve core, a second inner cavity matched with the sealing ring is arranged in the valve body, the second inner cavity is communicated with the first inner cavity, and the second inner cavity and the first inner cavity run through the entire valve body, the diameter of the valve sleeve head is larger than the aperture of the second inner cavity, and the aperture of the second inner cavity is larger than the aperture of the first inner cavity.

[0007] Furthermore, the hollow cavity is a cylindrical cavity, and a conical hole is provided at one end of the cylindrical cavity, the bottom end aperture of the conical hole is adapted to the aperture of the cylindrical cavity, and the top end aperture of the conical hole is adapted to the aperture of the oil inlet.

[0008] Further, at least one set of mounting holes are symmetrically arranged at the rear end of the valve cylinder body. The mounting holes are adapted to the pin columns. At the rear end of the valve body, notches are symmetrically provided. The notches are U-shaped notches, and the U-shaped notches are located outside the mounting holes.

[0009] Further, an external thread is provided on the outer part of the valve body.

[0010] Further, the valve body is made of a material with low wear and low friction performance.

[0011] Further, the valve core is made of copper material, and the ball is a steel ball.

[0012] Furthermore, a door closer includes a door closer body. The safety valve structures are installed in the pistons at the spring end and the buffer end inside the door closer body. Internal thread rings adapted to the external thread are provided in the pistons at the spring end and the buffer end inside the door closer body.

[0013] The beneficial effects of the present utility model are as follows: Due to the optimization of the product design of the present utility model, the pursuit of more stable and multi-functional product performance, and the standardization of the safety valve components in the door closer, the types and inventory of components are reduced, the operation cost is lowered, and a multi-purpose safety valve for door closers with a wide applicable product range, stable functions, high adaptability, and effective reduction of component inventory, as well as a safety valve structure and a door closer are developed.

[0014] The technical solution adopted by the present utility model is as follows: The component structure composition of the safety valve structure is re-set in the present utility model, and the safety valve components are standardized, so as to reduce the types and inventory of components and lower the operation cost of the company. Moreover, only by adjusting the compression torque of the pressure pin spring can this structure be adapted to door closers with different force level requirements. In addition, the external thread provided on the valve body can meet and be adapted to be installed on different models of door closers, such as concealed installation door closers, rack-type drive door closers, and cam-type drive door closer products, and all can adopt this safety valve structure. Description of the Drawings

[0015] Figure 1 is the structural schematic diagram of the safety valve structure Figure 1 ;

[0016] Figure 2 is the structural schematic diagram of the safety valve structure Figure 2 ;

[0017] Figure 3 is the side view of the safety valve structure;

[0018] Figure 4 is Figure 3 the cross-sectional view of part A-A in

[0019] Figure 5It is an exploded view of the safety valve structure;

[0020] Figure 6 It is a side view of a valve core with a plurality of mounting holes sleeved on a valve body;

[0021] Figure 7 It is a cross-sectional view of a door closer. DETAILED DESCRIPTION

[0022] like Figures 1 to 6 As shown, in this embodiment, the utility model includes a safety valve structure and a door closer, the safety valve structure includes a valve body 1 and a valve core 2 sleeved on the valve body 1, a hollow cavity 3 is arranged inside the valve core 2, and an oil inlet 4 and an oil overflow port 5 connected to the hollow cavity 3 are respectively arranged at both ends of the valve core 2, and it is characterized in that: a ball 6, a pressure pin spring 7 and a pin 8 are arranged in sequence in the hollow cavity 3, the pin 8 is used to limit the pressure pin spring 7, and the pressure pin spring 7 is used to resist the ball 6 to block the oil inlet 4, so that the oil circuit can only enter the hollow cavity 3 in one direction from the oil inlet 4 to push the ball 6 to compress the pressure pin spring 7, and cannot flow out from the oil inlet 4.

[0023] In this embodiment, the compression pin spring 7 is developed using a high-performance spring and needs to be applicable to the different force level requirements of EN1-EN7 and meet the requirements of the EN1154 standard that the torque value of the door closing delay function is greater than 2 times of 90 degrees and less than 150Nm.

[0024] In this embodiment, the valve core 2 includes a valve cylinder 21, the hollow cavity 3 is arranged inside the valve cylinder 21, a valve sleeve head 22 is arranged at the front end of the valve cylinder 21, the valve body 1 is provided with a first inner cavity 11 adapted to the valve cylinder 21, the diameter of the valve sleeve head 22 is larger than the aperture of the first inner cavity 11, a sealing ring 9 is arranged between the valve body 1 and the valve core 2, a second inner cavity 12 adapted to the sealing ring 9 is arranged in the valve body 1, the second inner cavity 12 is connected with the first inner cavity 11, and the second inner cavity 12 and the first inner cavity 11 run through the entire valve body 1, the diameter of the valve sleeve head 22 is larger than the aperture of the second inner cavity 12, and the aperture of the second inner cavity 12 is larger than the aperture of the first inner cavity 11. The effective design is that the valve core 2 can be well limited and inserted into the valve body 1.

[0025] In this embodiment, the hollow cavity 3 is a cylindrical cavity, and a conical hole 31 is provided at one end of the cylindrical cavity. The bottom end diameter of the conical hole 31 is adapted to the diameter of the cylindrical cavity, and the top end diameter of the conical hole 31 is adapted to the diameter of the oil inlet 4. This design enables the ball 6 to better block the oil inlet 4.

[0026] In this embodiment, multiple groups of mounting holes 211 are symmetrically arranged at the rear end of the valve cylinder body 21. The mounting holes 211 are adapted to the pin posts 8. Symmetrical notches 13 are provided at the rear end of the valve body 1, and the notches 13 are located outside the mounting holes 211. This design allows for adjustment in three aspects when different torque requirements of the door closer need to be met. First, different valve cores 2 can be selected. The difference in the valve cores 2 lies only in the opening depth of the oil inlet 4. The increased opening depth will increase the wall thickness and reduce the torque for compressing the compression pin spring 7 between the ball 6 and the pin post 8, thereby adapting to different torque requirements. Second, a high-performance spring with a force level that meets the torque requirements can be directly selected. Third, the position where the pin post 8 is inserted into the mounting hole 211 can be chosen to adjust the compression torque of the compression pin spring 7.

[0027] In this embodiment, an external thread 14 is provided on the outside of the valve body 1.

[0028] In this embodiment, considering the special usage scenario of this safety valve product, which is immersed in hydraulic oil to perform the check valve function, a material with very stable chemical properties, good thermoplastic formability, low wear, and low friction performance needs to be selected to make the valve body 1. It is preferably made of DuPont DELRIN 100 material, which has excellent toughness and strength, and its performance is particularly suitable for the installation method and usage environment of this product.

[0029] In this embodiment, the ball 6 is a steel ball. Due to the need for excellent sealing and oil-blocking performance in the structure of the safety valve, a copper material Ms58 with excellent cutting performance, good mechanical properties, and stable chemical properties is specifically selected as the material for the valve core 2. It is required to achieve a very good surface roughness RZ2.5 (Ra0.8) at a high cutting speed to meet the effect of achieving the oil circuit check valve function after cooperation with the steel ball.

[0030] As Figure 7 As shown, a door closer includes a door closer body 1a. The safety valve structure is installed inside the piston 2a at the spring end and inside the piston 2a at the buffer end within the door closer body 1a. Internal thread rings adapted to the external thread 14 are provided inside the piston 2a at the spring end and inside the piston 2a at the buffer end. This design installs the safety valve structure on the piston 2a to act as a one-way throttle valve. The spring end acts on the door opening buffering function, and the buffer end acts on the closing speed adjustment. At the same time, this safety valve is also an overload pressure relief valve, which can relieve pressure when the internal oil chamber pressure is too high.

[0031] Although the embodiments of the present utility model are described with actual solutions, they do not constitute a limitation to the meaning of the present utility model. For those skilled in the art, modifications to its implementation solutions according to this specification and combinations with other solutions are obvious.

Claims

1. A safety valve structure, comprising a valve body (1) and a valve core (2) sleeved on the valve body (1), wherein a hollow cavity (3) is arranged inside the valve core (2), and an oil inlet (4) and an oil overflow port (5) which are connected to the hollow cavity (3) are respectively arranged at two ends of the valve core (2), wherein: The hollow cavity (3) is provided with a ball (6), a pin spring (7) and a pin (8) in sequence. The pin (8) is used to limit and hold the pin spring (7). The pin spring (7) is used to press against the ball (6) to block the oil inlet (4). Thus, the oil can only enter the hollow cavity (3) in one direction from the oil inlet (4) by pushing the ball (6) to compress the pin spring (7) and cannot flow out from the oil inlet (4).

2. A safety valve structure according to claim 1, characterized in that: The valve core (2) comprises a valve column (21), the hollow cavity (3) is arranged inside the valve column (21), a valve sleeve head (22) is arranged at the front end of the valve column (21), the valve body (1) is provided with a first inner cavity (11) adapted to the valve column (21), and the diameter of the valve sleeve head (22) is larger than the aperture of the first inner cavity (11).

3. A safety valve structure according to claim 2, characterized in that: A sealing ring (9) is provided between the valve body (1) and the valve core (2); a second inner cavity (12) adapted to the sealing ring (9) is provided in the valve body (1); the second inner cavity (12) is communicated with the first inner cavity (11); the second inner cavity (12) and the first inner cavity (11) run through the entire valve body (1); the diameter of the valve sleeve head (22) is larger than the aperture of the second inner cavity (12); and the aperture of the second inner cavity (12) is larger than the aperture of the first inner cavity (11).

4. A safety valve structure according to claim 1, characterized in that: The hollow cavity (3) is a cylindrical cavity, and a conical hole (31) is provided at one end of the cylindrical cavity, the bottom end aperture of the conical hole (31) is adapted to the aperture of the cylindrical cavity, and the top end aperture of the conical hole (31) is adapted to the aperture of the oil inlet (4).

5. A safety valve structure according to claim 2, characterized in that: At least one group of mounting holes (211) are symmetrically arranged at the rear end of the valve column body (21), the mounting holes (211) being compatible with the pin column (8), and notches (13) are symmetrically arranged at the rear end of the valve body (1), the notches (13) being located outside the mounting holes (211).

6. A safety valve structure according to claim 1, characterized in that: The exterior of the valve body (1) is provided with an external thread (14).

7. A safety valve structure according to claim 1, characterized in that: The valve body (1) is made of a material with low wear and low friction properties.

8. A safety valve structure according to claim 1, characterized in that: The valve core (2) is made of copper, and the ball (6) is a steel ball.

9. A door closer, comprising a door closer body (1a), wherein the safety valve structure according to claim 6 is installed in the piston (2a) at the spring end and the piston (2a) at the buffer end in the door closer body (1a), characterized in that: An internal thread ring matching the external thread (14) is provided inside the piston (2a) at the spring end and inside the piston (2a) at the buffer end.

Images