Novel pneumatic door closer

Abstract

The utility model belongs to the technical field of door closers, and provides a novel pneumatic door closer which comprises an upper barrel and a lower barrel, a nitrogen cavity is formed in the bottom of the lower barrel, and nitrogen is arranged in the nitrogen cavity; a lifting part is arranged in the upper barrel body and comprises a rotor shaft, a rotor, a one-way valve and a ball, the one-way valve is arranged at the bottom of the rotor, and a leakage groove is formed in the end of the one-way valve; the ball is correspondingly arranged at the end part of the one-way valve in a sliding manner; and a pushing part is arranged in the lower barrel and comprises a positioning shaft, a positioning barrel, a sliding barrel, a supporting disc and a jacking rod, and the jacking rod is correspondingly arranged at the upper end of the nitrogen cavity. According to the novel pneumatic door closer provided by the utility model, the pressure difference of the pneumatic spring is small, so that all defects of a solid spring are avoided; meanwhile, speed adjustment is achieved without a valve needle, and practicability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of door closers, and particularly relates to a new pneumatic door closer. Background Art

[0002] A door closer is a hydraulic device similar to a spring on the door head. When the door is opened, it can be compressed and then released to automatically close the door, acting like a spring door. It can ensure that after the door is opened, it can be accurately and timely closed to the initial position. The significance of the door closer not only lies in automatically closing the door, but also in protecting the door frame and the door body (smooth closing). More importantly, the door closer has become an important and indispensable part in the intelligent management of modern buildings.

[0003] Most of the currently used door closers adopt a hydraulic scheme, which is similar to a structure with a fixed spring. The solid spring is very light at the initial stage of opening the door. As the opening angle of the door increases, the compression force of the spring also increases. As a result, it becomes heavier as the opening angle increases when opening the door, and the pressure of the solid spring becomes smaller and smaller as the spring is released when closing the door, and finally the door cannot be closed tightly. At the same time, in the prior art, the door closer adjusts the speed by using a valve needle, and the adjustment operation is troublesome and the practicability is poor. Content of the Utility Model

[0004] Aiming at the defects in the prior art, the utility model provides a new pneumatic door closer. The pressure difference of the pneumatic spring is small, thus avoiding all the disadvantages of the solid spring; at the same time, it does not need to adjust the speed through a valve needle, and has strong practicability.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A new pneumatic door closer includes an upper cylinder body and a lower cylinder body, and the upper cylinder body and the lower cylinder body are detachably connected; a nitrogen cavity is arranged at the bottom of the lower cylinder body, and nitrogen is arranged in the nitrogen cavity.

[0007] A lifting part is arranged in the upper cylinder body, and the lifting part includes a rotor shaft, a rotor, a one-way valve and a ball. The rotor is arranged at the bottom of the upper cylinder body; the rotor shaft is correspondingly arranged at the upper end of the rotor, and the end of the rotor shaft penetrates to the outside of the upper cylinder body.

[0008] The one-way valve is arranged at the bottom of the rotor, and a leakage groove is arranged at the end of the one-way valve; and the ball is correspondingly and slidably arranged at the end of the one-way valve.

[0009] A pushing part is arranged inside the lower cylinder body, and the pushing part includes a positioning shaft, a positioning cylinder, a sliding cylinder, a support disk and a jacking rod. The positioning cylinder and the sliding cylinder are sequentially arranged inside the lower cylinder body; the support disk is arranged on the outer wall of the sliding cylinder.

[0010] One end of the positioning shaft is arranged at the lower end of the rotor, and the other end of the positioning shaft penetrates through the positioning cylinder to the upper end of the support disc;

[0011] The end of the sliding cylinder is inserted into the bottom of the middle end of the positioning cylinder. The jacking rod is arranged at the lower end of the sliding cylinder, and the jacking rod is correspondingly arranged at the upper end of the nitrogen cavity.

[0012] As an improved technical solution, three positioning shafts are provided, and the positioning shafts are arranged in a circumferential array along the positioning cylinder.

[0013] As an improved technical solution, a gas seal ring is arranged at the end of the nitrogen cavity.

[0014] As an improved technical solution, hydraulic seal rings are arranged at the ends of the positioning cylinder. There are two hydraulic seal rings, and the hydraulic seal rings are respectively arranged on two opposite side ends of the positioning cylinder.

[0015] As an improved technical solution, one end of the upper cylinder body is correspondingly inserted into the lower cylinder body. Threaded holes are arranged on the outer wall of the lower cylinder body, and threaded nails are arranged in the threaded holes.

[0016] Due to the adoption of the above technical solutions, the present utility model has the following beneficial effects:

[0017] 1. For this new type of pneumatic door closer, by arranging nitrogen, a gas spring can be formed. The pressure difference of the pneumatic spring is small, thus avoiding all the disadvantages of the solid spring; at the same time, by arranging the balls, speed adjustment can be realized without a valve needle, and the practicability is strong.

[0018] 2. For this new type of pneumatic door closer, by arranging a plurality of the positioning shafts to support the rotor from different directions, the installation of the rotor is more stable.

[0019] 3. For this new type of pneumatic door closer, by arranging the gas seal ring, it is convenient to seal the nitrogen arranged in the nitrogen cavity.

[0020] 4. For this new type of pneumatic door closer, by arranging the hydraulic seal rings to seal the hydraulic oil, leakage of the hydraulic oil is prevented. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0022] Figure 1Schematic diagram of a new type of pneumatic door closer structure;

[0023] Figure 2 Schematic diagram of the installation of the lifting part and the pushing part;

[0024] Figure 3 Schematic diagram of the enlarged structure of the one-way valve;

[0025] Figure 4 Schematic diagram of the installation of the leakage groove;

[0026] Figure 5 Schematic diagram of the installation of the nitrogen cavity.

[0027] In the attached drawings, 1 is the upper cylinder body, 2 is the lower cylinder body, 21 is the threaded hole, 22 is the threaded nail, 3 is the nitrogen cavity, 31 is nitrogen, 4 is the lifting part, 41 is the rotor shaft, 42 is the rotor, 43 is the one-way valve, 431 is the leakage groove, 44 is the ball, 5 is the pushing part, 51 is the positioning shaft, 52 is the positioning cylinder, 53 is the sliding cylinder, 54 is the support plate, 55 is the jacking rod, 6 is the gas seal ring, and 7 is the hydraulic seal ring. Specific implementation mode

[0028] The technical solution of the present invention will be described in detail below in conjunction with specific embodiments. The following embodiments are only used to illustrate the technical solution of the present invention more clearly, so they are only examples and cannot be used to limit the protection scope of the present invention.

[0029] As Figures 1-5 shown, the present invention provides a new type of pneumatic door closer, which includes an upper cylinder body 1 and a lower cylinder body 2, and the upper cylinder body 1 and the lower cylinder body 2 are detachably connected;

[0030] One end of the upper cylinder body 1 is correspondingly inserted into the lower cylinder body 2, and a threaded hole 21 is provided on the outer wall of the lower cylinder body 2, and a threaded nail 22 is provided in the threaded hole 21; when connecting, one end of the upper cylinder body 1 is correspondingly inserted into the lower cylinder body 2, and then connected by the threaded nail 22;

[0031] Hydraulic oil is placed in the internal gap of the lower cylinder body 2; the hydraulic oil flows in the internal gap of the lower cylinder body 2;

[0032] A lifting part 4 is arranged in the upper cylinder body 1, and the lifting part 4 includes a rotor shaft 41, a rotor 42, a one-way valve 43 and a ball 44. The rotor 42 is arranged at the bottom of the upper cylinder body 1; the rotor shaft 41 is correspondingly arranged at the upper end of the rotor 42, and the end of the rotor shaft 41 penetrates to the outside of the upper cylinder body 1;

[0033] The one-way valve 43 is arranged at the bottom of the rotor 42, and the leakage groove 431 is arranged at the end of the one-way valve 43; and the ball 44 is correspondingly slidably arranged at the end of the one-way valve 43;

[0034] When the internal hydraulic oil flows, if the hydraulic oil enters the space at the lower part of the lower cylinder body 2 from the upper end of the one-way valve 43, at this time, the hydraulic oil pushes the ball 44 to the end of the one-way valve 43, and the ball 44 will limit the end of the one-way valve 43, and the hydraulic oil can only flow downward along the leakage groove 431;

[0035] If the hydraulic oil enters the space at the upper part of the lower cylinder body 2 from the lower end of the one-way valve 43, the hydraulic oil pushes the ball 44 to the outside of the one-way valve 43. At this time, the ball 44 does not limit the one-way valve 43, and the hydraulic oil flows upward along the one-way valve 43;

[0036] A pushing part 5 is arranged inside the lower cylinder body 2. The pushing part 5 includes a positioning shaft 51, a positioning cylinder 52, a sliding cylinder 53, a support disk 54 and a jacking rod 55. The positioning cylinder 52 and the sliding cylinder 53 are sequentially arranged inside the lower cylinder body 2; a support disk 54 is arranged on the outer wall of the sliding cylinder 53;

[0037] Hydraulic seals 7 are arranged at the ends of the positioning cylinder 52. There are two hydraulic seals 7, and the hydraulic seals 7 are respectively arranged on two opposite side ends of the positioning cylinder 52; the hydraulic seals 7 are arranged to seal the hydraulic oil to prevent the leakage of the hydraulic oil;

[0038] One end of the positioning shaft 51 is arranged at the lower end of the rotor 42, and the other end of the positioning shaft 51 passes through the positioning cylinder 52 to the upper end of the support disk 54;

[0039] There are three positioning shafts 51, and the positioning shafts 51 are arranged in a circumferential array along the positioning cylinder 52; a plurality of positioning shafts 51 are arranged to support the rotor 42 from different directions, and the installation of the rotor 42 is more stable;

[0040] The end of the sliding cylinder 53 is inserted into the bottom of the middle end of the positioning cylinder 52. A jacking rod 55 is arranged at the lower end of the sliding cylinder 53, and the jacking rod 55 is correspondingly arranged at the upper end of the nitrogen cavity 3;

[0041] A nitrogen cavity 3 is arranged at the bottom of the lower cylinder body 2, and nitrogen 31 is arranged inside the nitrogen cavity 3; a gas seal 6 is arranged at the end of the nitrogen cavity 3; the gas seal 6 is arranged to facilitate the sealing of the nitrogen 31 arranged inside the nitrogen cavity 3; by using nitrogen 31, the pressure difference of the pneumatic spring is small, thus avoiding all the disadvantages of the solid spring;

[0042] The use process of the above new type of pneumatic door closer is as follows:

[0043] When a person opens the door, the rotor 42 rotates along the rotor shaft 41. When the rotor 42 rotates, the rotor 42 moves downward. When the rotor 42 moves downward, the internal hydraulic oil enters the space at the upper part of the lower cylinder body 2 from bottom to top through the one-way valve 43. At this time, the ball 44 does not limit the one-way valve 43;

[0044] Meanwhile, the hydraulic oil pushes the positioning cylinder 52 downward. When the positioning cylinder 52 moves downward, it will push the sliding cylinder 53. The sliding cylinder 53 drives the jacking rod 55 to move downward. When the jacking rod 55 moves downward, it will exert a certain extrusion on the nitrogen gas 31 arranged in the nitrogen gas cavity 3. Repeat the above operations until the personnel open the door to the required angle;

[0045] After the personnel pass through, the door closer closes the door; after being squeezed, the nitrogen gas 31 generates a driving force, and the generated pressure pushes the jacking rod 55 in the reverse direction. When the jacking rod 55 moves upward, it drives the sliding cylinder 53 to move upward. The sliding cylinder 53 drives the positioning cylinder 52 to move upward. The positioning cylinder 52 drives the rotor 42 to rotate through the positioning shaft 51. The rotor 42 completes a 90-degree operation along the rotor shaft 41 to the initial position;

[0046] Meanwhile, the internal hydraulic oil enters the space at the lower part of the lower cylinder body 2 from top to bottom through the one-way valve 43. At this time, the hydraulic oil pushes the ball 44 to the end of the one-way valve 43. The ball 44 will limit the end of the one-way valve 43. At the same time, the hydraulic oil flows downward along the leakage groove 431. There is no need to use a valve needle to adjust the speed, and the speed of the entire door closing can be controlled, which has strong practicability.

[0047] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered by the scope of the claims and the description of the present invention.

Claims

1. A new type of pneumatic door closer, characterized in that: It includes an upper cylinder body and a lower cylinder body, and the upper cylinder body and the lower cylinder body are detachably connected; a nitrogen cavity is arranged at the bottom of the lower cylinder body, and nitrogen is arranged in the nitrogen cavity. A lifting part is arranged in the upper cylinder body. The lifting part includes a rotor shaft, a rotor, a check valve and a ball. The rotor is arranged at the bottom of the upper cylinder body; the rotor shaft is correspondingly arranged at the upper end of the rotor, and the end of the rotor shaft penetrates to the outside of the upper cylinder body. The check valve is arranged at the bottom of the rotor, and a leakage groove is arranged at the end of the check valve; and the ball is correspondingly and slidably arranged at the end of the check valve. A pushing part is arranged inside the lower cylinder body. The pushing part includes a positioning shaft, a positioning cylinder, a sliding cylinder, a support disk and a jacking rod. The positioning cylinder and the sliding cylinder are sequentially arranged inside the lower cylinder body; the support disk is arranged on the outer wall of the sliding cylinder. One end of the positioning shaft is arranged at the lower end of the rotor, and the other end of the positioning shaft penetrates through the positioning cylinder to the upper end of the support disk. The end of the sliding cylinder is inserted into the bottom of the middle end of the positioning cylinder. The jacking rod is arranged at the lower end of the sliding cylinder, and the jacking rod is correspondingly arranged at the upper end of the nitrogen cavity.

2. The novel pneumatic door closer according to claim 1, wherein: There are three positioning shafts, and the positioning shafts are arranged in a circumferential array along the positioning cylinder.

3. A new type of pneumatic door closer according to claim 1, characterized in that: A gas sealing ring is arranged at the end of the nitrogen cavity.

4. A novel pneumatic door closer according to claim 1, characterized in that: Hydraulic sealing rings are arranged at the ends of the positioning cylinder. There are two hydraulic sealing rings, and the hydraulic sealing rings are respectively arranged on two opposite side ends of the positioning cylinder.

5. A novel pneumatic door closer according to claim 1, wherein: One end of the upper cylinder body is correspondingly inserted into the lower cylinder body. Threaded holes are arranged on the outer wall of the lower cylinder body, and threaded nails are arranged in the threaded holes.

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