Bidirectional vent valve for coupler

Abstract

The utility model discloses a two-way vent valve for a coupler. The two-way vent valve comprises a valve body, a valve element, an elastic piece and a blocking plug. A cylindrical hole is transversely formed in the center of the valve body, a plurality of leftward blind holes and rightward blind holes are inwards and transversely formed in the left end face and the right end face of the valve body respectively, a plurality of middle communicating holes are formed in the middle of the outer wall of the valve body towards the cylindrical hole in a penetrating mode, each middle communicating hole is communicated with one leftward blind hole or one rightward blind hole, and a blocking welding head is arranged at the position close to the outer wall of the valve body. The blocking plugs are detachably arranged at the two ends of the cylindrical hole respectively, the valve element is movably arranged in the middle of the inner side of the cylindrical hole, and elastic pieces are arranged between the two sides of the valve element and the two blocking plugs respectively. A vent hole is formed in the center of the blocking plug. According to the utility model, air can be automatically sucked or discharged through the vent valve in the telescopic process of the coupler, and after the telescopic process is finished, the vent valve automatically isolates the internal space from the external space to prevent external water vapor from entering and eroding the spline, so that the reliable operation of the coupler is ensured, and the service life of the coupler is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of couplings and relates to a two-way vent valve for couplings. Background Art

[0002] Couplings, also known as couplings, are mechanical components used to firmly connect the driving shaft and the driven shaft in different mechanisms to rotate together and transmit motion and torque. They are a common industrial product. With the development of technology and the needs of installation or use, most couplings are currently required to have telescopic functions, and most of the coupling telescopic functions are realized by spline pair structures. In order to keep the spline flexible and retractable for a long time, the spline part needs to be lubricated and sealed in a closed space. During the expansion and contraction process of the coupling, the volume of the internal space of the spline pair changes, and air needs to be inhaled or discharged. When not expanding and contracting, the internal and external spaces need to be isolated to prevent external water vapor from entering and corroding the spline, causing poor expansion and contraction or increased wear, which directly affects the service life of the coupling. Utility Model Content

[0003] In view of the deficiencies existing in the background technology, the utility model provides a two-way vent valve for a coupling, which can enable the coupling to automatically inhale or discharge air through the vent valve during the extension and retraction process. After the extension and retraction process is completed, the vent valve automatically isolates the internal and external spaces to prevent external water vapor from entering and corroding the splines, thereby ensuring the reliable operation of the coupling and extending the service life of the coupling.

[0004] The technical solution of the utility model to solve the technical problem is as follows:

[0005] The utility model discloses a two-way air vent valve for a coupling, which comprises a valve body, a valve core, an elastic member and a stopper; a cylindrical hole is transversely opened in the center of the valve body, and a plurality of left-direction blind holes and right-direction blind holes are transversely opened inwardly on the left and right end surfaces respectively, and a plurality of middle connecting holes are opened in the middle of the outer wall toward the cylindrical hole, each middle connecting hole is connected with a left-direction blind hole or a right-direction blind hole and a plugging welding head is arranged near the outer wall of the valve body; the stoppers are detachably arranged at the two ends of the cylindrical hole, the valve core is movably arranged in the middle of the inner side, and elastic members are respectively arranged between the two sides of the valve core and the two stoppers; a vent hole is opened in the center of the stopper.

[0006] Furthermore, both ends of the cylindrical hole are provided with internal threads respectively, the blocking plug is a threaded plug, the outer side of which is provided with external threads that match and are connected to the internal threads, and the vent hole is a hexagonal through hole.

[0007] Furthermore, the elastic member is a spring.

[0008] Furthermore, the valve core is a stepped cylinder with bilateral symmetry and outer diameters on both sides smaller than the middle outer diameter, wherein the middle outer circle is gap-matched with the cylindrical hole of the valve body, one end of the elastic part is connected to the left or right outer circle of the valve body, and the other end is in contact with the stopper.

[0009] Furthermore, the outer side of the valve body is cylindrical as a whole, and its outer circle is smooth or provided with external threads.

[0010] Furthermore, there are two left-hand blind holes and two right-hand blind holes, which are arranged on the left end face or the right end face of the valve body with a circumferential difference of 90° or 180° respectively, and the left-hand blind holes and the right-hand blind holes are staggered.

[0011] Furthermore, the middle communicating hole is radially connected to the cylindrical hole from the outer wall of the valve body.

[0012] Compared with the prior art, the utility model provides a two-way vent valve for a coupling, which has the following

[0013] Beneficial effects:

[0014] (1) The utility model has a novel and reasonable design, a simple structure, is easy to assemble and disassemble, and is easy to use. It has a low manufacturing cost and a good effect.

[0015] (2) The utility model provides a two-way air valve for a coupling. During the extension process of the coupling, the volume of the internal space of the spline pair increases, the internal air pressure is lower than the external air pressure, the external air pressure pushes the valve core to the left, and the air valve inhales air; during the shortening process of the coupling, the volume of the internal space of the spline pair decreases, the internal air pressure is higher than the external air pressure, the internal air pressure pushes the valve core to the right, and the air valve discharges air.

[0016] (3) The utility model provides a two-way vent valve for a coupling. After each extension or contraction process of the coupling, the valve core of the vent valve can automatically reset under the action of the elastic member, blocking the middle connecting holes, isolating the internal and external spaces, and preventing external water vapor from entering and corroding the splines, thereby ensuring the reliable operation of the coupling and extending the service life of the coupling.

[0017] (4) The utility model provides a two-way vent valve for a coupling, by arranging the left-hand blind hole and the right-hand blind hole on the left end face or the right end face of the valve body with a circumferential difference of 90° or 180° respectively, and staggering the left-hand blind hole and the right-hand blind hole, and connecting the middle connecting hole radially from the outer wall of the valve body to the cylindrical hole to form a cross-shaped through hole structure that penetrates the valve body, which can effectively ensure that when the coupling is extended or shortened, the air intake or exhaust function is more effectively realized.

[0018] (5) The utility model provides a two-way vent valve for a coupling, which uses a threaded plug as a stopper and sets the vent hole of the stopper into an inner hexagonal shape, so that the stopper is easy to install at both ends of the cylindrical hole of the valve body.

[0019] (6) The utility model provides a two-way vent valve for a coupling. By providing a valve body with a cylindrical shape and configuring the outer circle of the valve body to be a smooth circle or an external thread, it is convenient to fix the valve body with the corresponding through hole on the coupling through circumferential angle welding or screw-on threading, thereby adapting to the installation requirements of different couplings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the utility model;

[0021] Figure 2 It is a side structural schematic diagram of the utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the valve body of the utility model;

[0023] Figure 4 It is a side structural schematic diagram of the valve body of the utility model;

[0024] Figure 5 This is a schematic diagram of air flow during the air intake process of the vent valve of the utility model;

[0025] Figure 6 This is a schematic diagram of air flow during the exhaust process of the vent valve of the utility model;

[0026] Figure 7 This is a schematic diagram of the ventilation valve and coupling of the utility model installed by welding;

[0027] Figure 8 This is a schematic diagram of the utility model of the vent valve and the coupling being installed through threads;

[0028] In the figure: 1. valve body; 101. right-facing blind hole; 102. internal thread; 103. cylindrical hole; 104. left-facing blind hole; 105. middle connecting hole; 106. plugging head; 2. valve core; 3. elastic part; 4. stopper; 41. vent hole; 5. coupling. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model. Unless otherwise defined, the technical terms or scientific terms used herein should be the usual meanings understood by people with general skills in the field to which the disclosure belongs. The "upper", "lower", "left", "right", "front", "back", "inside", "outside" and the like used in the patent application specification and claims of the present disclosure are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship also changes accordingly. The places not described in detail in the utility model are all known technologies of technicians in the technical field.

[0030] As attached Figure 1-8 As shown, the utility model is a two-way vent valve for a coupling, which includes a valve body 1, a valve core 2, an elastic member 3 and a stopper 4. The valve body 1 is generally cylindrical in shape as a whole, which is convenient for setting corresponding through holes on the coupling and matching installation; a cylindrical hole 103 is horizontally opened in the center of the valve body 1, and a plurality of left-facing blind holes 104 and right-facing blind holes 101 are horizontally opened inward on the left and right end surfaces respectively, and a plurality of middle communicating holes 105 are opened in the middle of the outer wall toward the cylindrical hole 103, each middle communicating hole 105 is connected with a left-facing blind hole 104 or a right-facing blind hole 101 and a plugging head 106 is arranged near the outer wall of the valve body 1, and the plugging head 106 is welded to the outer side of the middle communicating hole 105 on the outer side of the valve body 1. After welding, The surface is ground to form a welding plug 106; the two ends of the cylindrical hole 103 are respectively detachably provided with the plugs 4, and the valve core 2 is movably provided in the middle of the inner side thereof, and elastic parts 3 are respectively provided on both sides of the valve core 2 and between the two plugs 4. The elastic parts 3 are preferably springs, which are in a compressed state during initial installation to ensure that in the initial state, the valve core 2 is in the middle of the cylindrical hole 103 under the action of the elastic parts 3 on both sides, and at the same time blocks the middle connecting holes 105. When the valve core is offset due to external force, the middle connecting holes 105 can be connected with the cylindrical hole 103 to facilitate the intake or exhaust of air. When the external force is eliminated, the valve core can be reset to the center of the cylindrical hole under the action of the elastic part; a vent 41 is provided in the center of the plug 4.

[0031] In this embodiment, the outer circumference of the valve body 1 can be set to a smooth surface or to be provided with external threads to meet different types of installation methods and adapt to the needs of different couplings. Figure 7As shown, the two-way vent valve can be matched with the through hole pre-opened on the coupling 5, and then the circumference of one end of the valve body 1 and the coupling 5 are fixed by fillet welding. When the outer circumference of the valve body 1 is provided with an external thread, as shown in FIG. Figure 8 As shown, a through hole with an internal thread can be pre-opened on the coupling 5, and the two-way vent valve can be screwed and fixed into the through hole.

[0032] When in use, after the two-way vent valve is installed on the coupling, Figure 5 As shown, during the elongation of the coupling, the volume of the internal space of the spline pair increases, the internal air pressure is lower than the external air pressure, and the external air enters the cylindrical hole 103 from the vent hole 41 of the stopper 4, and exerts pressure to push the valve core 2 to the left. At the same time, the external air enters the cylindrical hole 103 from the right blind hole 101 through the middle connecting hole 105, and then enters the left blind hole 104 through the middle connecting hole 105, and finally enters the interior of the spline pair, and the vent valve inhales air; as shown in FIG. Figure 6 As shown, during the shortening process of the coupling, the volume of the internal space of the spline pair decreases, and the internal air pressure is higher than the external air pressure. The internal air pressure enters the cylindrical hole 103 from the vent hole 41 of the inner stopper 4, and exerts pressure to push the valve core 2 to the right. At the same time, the air inside the spline pair enters the cylindrical hole 103 from the left blind hole 104 through the middle connecting hole 105, and then enters the right blind hole 101 through the middle connecting hole 105 and exhausts the air to the outside. After each extension or shortening process of the coupling, the valve core of the vent valve can automatically reset under the action of the spring, blocking the middle connecting holes 105, isolating the internal and external spaces, and preventing water vapor from entering.

[0033] In this embodiment, in order to facilitate the installation of the stopper 4, internal threads 102 are respectively provided at both ends of the cylindrical hole 103. The stopper 4 is a threaded plug, and its outer side is provided with external threads that are compatible with the internal threads 102 and connected. The vent hole 41 is a hexagonal through hole.

[0034] In this embodiment, the valve core 2 can be a stepped cylinder made of metal or non-metal material, which is symmetrical on both sides and has an outer diameter smaller than the middle outer diameter. The middle outer circle is clearance-matched with the cylindrical hole 103 of the valve body 1 and can slide relatively. One end of the elastic member 3 is connected to the left or right outer circle of the valve body 1, and the other end is attached to the stopper 4.

[0035] In this embodiment, in order to achieve a more stable air intake and exhaust effect, the left-hand blind hole 104 and the right-hand blind hole 101 are both located at two locations, which are arranged at a circumferential difference of 90° or 180° on the left end face or the right end face of the valve body 1, and the left-hand blind hole 104 and the right-hand blind hole 101 are staggered. The middle connecting hole 105 is radially connected to the cylindrical hole 103 from the outer wall of the valve body 1.

Claims

1. A two-way vent valve for a coupling, characterized by: It comprises a valve body (1), a valve core (2), an elastic member (3) and a stopper (4); a cylindrical hole (103) is transversely provided at the center of the valve body (1), and a plurality of left-facing blind holes (104) and right-facing blind holes (101) are transversely provided inwardly on the left and right end surfaces of the valve body (1); a plurality of middle connecting holes (105) are provided in the middle of the outer wall thereof, which pass through the cylindrical hole (103); each middle connecting hole (105) is connected to a left-facing blind hole (104) or a right-facing blind hole (101) and a plugging welding head (106) is provided near the outer wall of the valve body (1); the stopper (4) is detachably provided at both ends of the cylindrical hole (103), the valve core (2) is movably provided at the middle of the inner side thereof, and elastic members (3) are provided between the two sides of the valve core (2) and the two stoppers (4); a vent hole (41) is provided in the center of the stopper (4).

2. A two-way vent valve for a coupling according to claim 1, characterized in that: The two ends of the cylindrical hole (103) are respectively provided with internal threads (102); the blocking plug (4) is a threaded plug, the outer side of which is provided with external threads that match and are connected to the internal threads (102); and the vent hole (41) is a hexagonal through hole.

3. A two-way vent valve for a coupling according to claim 1, characterized in that: The elastic member (3) is a spring.

4. A two-way vent valve for a coupling according to claim 1, characterized in that: The valve core (2) is a stepped cylinder that is bilaterally symmetrical and has an outer diameter on both sides that is smaller than the outer diameter in the middle. The outer diameter in the middle is clearance-matched with the cylindrical hole (103) of the valve body (1). One end of the elastic member (3) is connected to the left or right outer circle of the valve body (1), and the other end is in contact with the stopper (4).

5. A two-way vent valve for a coupling according to any one of claims 1 to 4, characterized in that: The outer side of the valve body (1) is cylindrical as a whole, and its outer circle is smooth or provided with external threads.

6. A two-way vent valve for a coupling according to claim 5, characterized in that: The left-hand blind holes (104) and the right-hand blind holes (101) are both located at two locations, and are arranged at a circumferential difference of 90° or 180° on the left end face or the right end face of the valve body (1). The left-hand blind holes (104) and the right-hand blind holes (101) are distributed in an alternating manner.

7. A two-way vent valve for a coupling according to claim 5, characterized in that: The middle communication hole (105) is radially connected to the cylindrical hole (103) from the outer wall of the valve body (1).

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