Special connector for gas

Abstract

The utility model relates to a special connector for gas, which belongs to the technical field of adapters and comprises a first valve body, a second valve body, a first valve core, a first return spring, a second valve core and a second return spring, a first limit ring is fixed in the first valve body in a penetrating manner, and a second limit ring is fixed in the first limit ring in a penetrating manner; one end of the second valve body is inserted into one end of the first valve body; the first valve core slides in the second valve body; one end of the first return spring abuts against the other end of the first valve element, and the other end of the first return spring abuts against the first limiting ring. The second valve element comprises a sealing plate and a reset rod, and the sealing plate slides in the second limiting ring. One end of the reset rod is fixed on the sealing plate; one end of the second return spring is fixed on the reset rod in a penetrating manner, and the other end of the second return spring abuts against the second limiting ring. The first valve element, the first return spring, the second valve element and the second return spring are used for forming a double-valve-element opening and closing structure, the defect that a single valve element is prone to air leakage can be overcome, and the service life can be prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of adapters, and particularly relates to a special gas adapter. Background Art

[0002] Gas adapters are widely used in the hydraulic or pneumatic systems of various machines due to their simple structure, low cost, convenient use, easy disassembly and assembly, and excellent sealing performance.

[0003] Currently, the most widely used gas adapter in the market is the ferrule type gas adapter, which mainly consists of a valve body, a valve core, and a return spring. The two ends of the valve body are detachably clamped in the hydraulic or pneumatic system through ferrules respectively, and a limit ring is arranged inside it; the valve core includes a sealing plate and a moving rod. The sealing plate slides inside the limit ring; the moving rod is placed inside the limit ring and one end of it is fixed on the sealing plate; the return spring is sleeved on the outer peripheral side of the moving rod and one end of it is sleeved and fixed on the moving rod, and the other end abuts against the limit ring; in actual use, the valve body is connected to the hydraulic or pneumatic system. When the hydraulic or pneumatic system is filled with high-pressure gas or high-pressure liquid, the high-pressure gas or high-pressure liquid will push the sealing plate out of the limit ring, opening the gas adapter and connecting the hydraulic or pneumatic system; when there is no high-pressure gas or high-pressure liquid in the hydraulic or pneumatic system, the return spring returns to its initial state, which will drive the sealing plate to reset, seal the limit ring, and block the hydraulic or pneumatic system; in this cycle, the hydraulic or pneumatic system is opened and closed.

[0004] However, the above ferrule type gas adapter only uses a single valve core for opening and closing control. Due to the limited sealing effect of a single valve core, problems such as liquid leakage or air leakage are likely to occur; at the same time, the fastening force of the ferrule type connection method is limited. When the hydraulic or pneumatic system shakes, it is extremely easy to cause the gas adapter to be unstable in connection, resulting in problems such as liquid leakage or air leakage.

[0005] Therefore, how to design a special gas adapter with more stable connection, safer use, and better sealing performance is an urgent problem to be solved by those skilled in the art. Summary of the Utility Model

[0006] The utility model provides a special gas adapter to solve the technical problems of the existing ferrule type gas adapter with unstable connection, unsafe use, and limited sealing effect.

[0007] The technical solution of the utility model to solve the above technical problems is as follows: a special gas adapter includes: a first valve body, a second valve body, a first valve core, a first return spring, a second valve core, and a second return spring.

[0008] The first valve body is of a cylindrical structure and a first limit ring is fixedly penetrated inside it, and a second limit ring is fixedly penetrated inside the first limit ring; the second valve body is of a cylindrical structure and one end of it is detachably inserted into one end of the first valve body.

[0009] The first valve core is a columnar structure and slides in the second valve body. An end of the first valve core away from the first valve body is provided with a venting groove, and a groove wall of the venting groove is provided with a plurality of venting holes. One end of the first return spring abuts against the other end of the first valve core close to the first valve body, and the other end abuts against the first limiting ring.

[0010] The second valve core includes a sealing plate and a reset rod, and the sealing plate slides in the second limiting ring; the reset rod is located inside the first valve body and one end of the reset rod is fixed on the plate surface of the sealing plate close to the second valve body; the second return spring is sleeved on the outer peripheral side of the reset rod and one end of the second return spring is passed through and fixed on the reset rod, and the other end of the second return spring abuts against the second limiting ring.

[0011] The beneficial effects of the utility model are as follows: first, the first valve core is utilized to slide in the second valve body; since one end of the first valve core is provided with a ventilation groove and a ventilation hole is provided on the groove wall of the ventilation groove, and since one end of the first return spring abuts against the other end of the first valve core and the other end abuts against the first limit ring, when the second valve body is connected to an external pneumatic system, the high-pressure gas in the pneumatic system enters the ventilation groove and can push the first valve core to slide in a direction close to the first valve body, thereby opening the second valve body and connecting the second valve body with the external pneumatic system; and then the sealing plate is utilized to slide in the second sealing ring; since one end of the moving rod is fixed on the plate surface of the sealing plate close to the second valve body, and since the second return spring sleeve It is arranged on the moving rod and one end of it is sleeved on the moving rod, and the other end of it abuts on the second limit ring. When the high-pressure gas enters the first valve body through multiple air holes, the high-pressure gas will continue to push the sealing plate to slide out of the second limit ring in the direction away from the second valve body, thereby opening the first valve body and connecting the first valve body with the external pneumatic system; the above structure improves the structure of the traditional gas joint, and uses the first valve core, the first return spring, the second valve core and the second return spring to form a double-valve core opening and closing structure in the first valve body and the second valve body, which can not only make up for the defect of a single valve core that is easy to leak, improve the air tightness of the gas joint, but also extend the service life of the first valve core, the first return spring, the second valve core and the second return spring.

[0012] On the basis of the above technical solution, the present invention can also be improved as follows.

[0013] Furthermore, a blocking ring is sleeved on the outer peripheral side of the first valve core close to the first valve body; the first return spring is sleeved on the outer peripheral side of the first valve core and one end of the first return spring abuts against the blocking ring.

[0014] A further beneficial effect of the above method is that the first return spring is sleeved on the first valve core and contacts the blocking ring on the first valve core, so as to avoid the first return spring and the first valve core from separating, thereby improving the stability and reliability of the return of the first valve core.

[0015] Further, it further includes a first sealing ring. An outer peripheral side of the first valve core corresponding to between the blocking ring and the plurality of vent holes is provided with a first annular groove; the first sealing ring is fixedly sleeved in the first annular groove.

[0016] Further, an outer peripheral side of the reset rod close to the second valve body is provided with an annular fixing groove; one end of the second return spring is fixedly inserted in the fixing groove.

[0017] The beneficial effect of adopting the above is:

[0018] Further, it further includes a second sealing ring. An outer peripheral side of the sealing plate is provided with a second annular groove; the second sealing ring is fixedly sleeved in the second annular groove.

[0019] Further, it further includes a guide ring. The guide ring is detachably inserted through the first valve body and abuts against the first limiting ring; the reset rod slides in an inner hole of the guide ring.

[0020] The beneficial effect of adopting the above is: By using the guide ring inside the first valve body to guide the moving direction of the reset rod, the shaking of the reset rod can be avoided, and the reliability of the gas joint can be improved.

[0021] Further, it further includes a connecting cylinder, a knob and a sleeve. The connecting cylinder is detachably inserted into the second valve body and its inserted end abuts against one end of the first valve core; a through hole is provided in the middle of the knob, the through hole is sleeved on an outer peripheral side of the connecting cylinder and is detachably sleeved on an outer peripheral side of the second valve body; the sleeve is detachably sleeved on an extending end of the connecting cylinder away from the second valve body.

[0022] Further, it further includes a retaining ring. A snap ring is fixedly sleeved on an outer peripheral side of the connecting cylinder close to its inserted end inserted into the second valve body, and a clamping groove is provided on an outer peripheral side of the connecting cylinder away from its inserted end inserted into the second valve body; the retaining ring is detachably sleeved in the clamping groove; an anti - detachment ring is fixedly inserted in an inner hole of the through hole, and the anti - detachment ring can abut against the snap ring or the retaining ring.

[0023] Further, an outer peripheral side of the first valve body away from the second valve body is provided with an external thread for communicating with the outside; the sleeve includes a first sleeve section and a second sleeve section which are integrally connected. The first sleeve section is detachably sleeved on an extending end of the connecting cylinder away from the second valve body; a diameter of the second sleeve section is larger than a diameter of the first sleeve and an internal thread for communicating with the outside is provided inside it.

[0024] The beneficial effect of adopting the above is: By using the external thread of the first valve body and the internal thread of the sleeve to connect with an external pneumatic system, the connection stability can be improved, and the shaking of the pneumatic system can be avoided, which affects the sealing performance and reliability of the gas joint.

[0025] Further, the outer peripheral sides of the first valve body, the second valve body, the knob, the connecting cylinder and the sleeve are all galvanized with nickel. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 FIG. 1 is a schematic perspective view of a gas special joint of the present utility model;

[0027] Figure 2 FIG. 2 is a schematic front view of a gas special joint of the present utility model;

[0028] Figure 3 FIG. 3 is a schematic internal structure view of a gas special joint of the present utility model.

[0029] In the drawings, the list of components represented by each reference numeral is as follows:

[0030] 1, first valve body; 2, second valve body; 3, first valve core; 4, first return spring; 5, second valve core; 51, sealing plate; 52, return rod; 521, fixing groove; 6, second return spring; 7, first limiting ring; 8, second limiting ring; 9, blocking ring; 10, first sealing ring; 11, second sealing ring; 12, connecting cylinder; 121, clamping groove; 13, knob; 14, sleeve; 15, snap ring; 16, anti-disengagement ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] The principles and features of the present utility model will be described below with reference to the accompanying drawings. The examples given are only for explaining the present utility model and are not intended to limit the scope of the present utility model.

[0032] As Figure 3 shown, a gas special joint includes: a first valve body 1, a second valve body 2, a first valve core 3, a first return spring 4, a second valve core 5 and a second return spring 6.

[0033] The first valve body 1 is of a cylindrical structure and a first limiting ring 7 is fixedly sleeved inside it, and a second limiting ring 8 is fixedly sleeved inside the first limiting ring 7; the second valve body 2 is of a cylindrical structure and one end of it is detachably inserted into one end of the first valve body 1; the first valve core 3 is of a columnar structure and slides inside the second valve body 2, and a ventilation groove 31 is provided at one end of the first valve core 3 away from the first valve body 1, and a plurality of ventilation holes 32 are provided on the groove wall of the ventilation groove 31; one end of the first return spring 4 abuts against the other end of the first valve core 3 close to the first valve body 1 and the other end abuts against the first limiting ring 7; the second valve core 5 includes a sealing plate 51 and a return rod 52, the sealing plate 51 slides inside the second limiting ring 8; the return rod 52 is located inside the first valve body 1 and one end of it is fixed on the plate surface of the sealing plate 51 close to the second valve body 2; the second return spring 6 is sleeved on the outer peripheral side of the return rod 52, one end of it is fixedly sleeved on the return rod 52, and the other end abuts against the second limiting ring 8.

[0034] As Figure 3 shown, in some specific embodiments, a blocking ring 9 is sleeved on the outer peripheral side of the first valve core 3 close to the first valve body 1; a first return spring 4 is sleeved on the outer peripheral side of the first valve core 3 and one end thereof abuts against the blocking ring 9.

[0035] As Figure 3 shown, in some specific embodiments, a first sealing ring 10 is further included. A first annular groove is provided on the outer peripheral side of the first valve core 3 corresponding to between the blocking ring 9 and a plurality of vent holes 32; the first sealing ring 10 is sleeved and fixed in the first annular groove.

[0036] As Figure 3 shown, in some specific embodiments, an annular fixing groove 521 is provided on the outer peripheral side of the reset rod 52 close to the second valve body 2; one end of the second return spring 6 is fixedly inserted into the fixing groove 521.

[0037] As Figure 3 shown, in some specific embodiments, a second sealing ring 11 may further be included. A second annular groove is provided on the outer peripheral side of the sealing plate 51; the second sealing ring 11 is sleeved and fixed in the second annular groove.

[0038] As Figure 3 shown, in some specific embodiments, a guide ring may further be included. The guide ring is detachably inserted through the first valve body 1 and abuts against the first limiting ring 7; the reset rod 52 slides in the inner hole of the guide ring.

[0039] As Figure 3 shown, in some specific embodiments, a connecting cylinder 12, a knob 13 and a sleeve 14 may further be included. The connecting cylinder 12 is detachably inserted into the second valve body 2 and the inserted end thereof abuts against one end of the first valve core 3; a through hole is provided in the middle of the knob 13, the through hole is sleeved on the outer peripheral side of the connecting cylinder 12 and is detachably sleeved on the outer peripheral side of the second valve body 2; the sleeve 14 is detachably sleeved on the protruding end of the connecting cylinder 12 away from the second valve body 2.

[0040] As Figure 3 shown, in some specific embodiments, a retaining ring may further be included. A snap ring 15 is sleeved on the outer peripheral side of the connecting cylinder 12 close to the inserted end inserted into the second valve body 2, and a clamping groove 121 is provided on the outer peripheral side of the connecting cylinder 12 away from the inserted end inserted into the second valve body 2; the retaining ring is detachably sleeved in the clamping groove 121; an anti - detachment ring 16 is fixedly inserted into the inner hole of the through hole, and the anti - detachment ring 16 can abut against the snap ring 15 or the retaining ring.

[0041] As Figure 3As shown, in some specific embodiments, an external thread for communicating with the outside is provided on the outer peripheral side of the first valve body 1 away from the second valve body 2; the sleeve 14 includes a first sleeve section and a second sleeve section integrally connected. The first sleeve section 14 of the sleeve is detachably sleeved on the protruding end of the connecting cylinder 12 away from the second valve body 2; the diameter of the second sleeve section 14 is larger than that of the first sleeve 14, and an internal thread for communicating with the outside is provided inside it.

[0042] In some specific embodiments, the outer peripheral sides of the first valve body 1, the second valve body 2, the knob 13, the connecting cylinder 12, and the sleeve 14 are all galvanized with nickel.

[0043] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A special joint for gas, characterized in that: include: A first valve body (1), the first valve body (1) is a cylindrical structure and a first limiting ring (7) is inserted into the interior of the first limiting ring (7), and a second limiting ring (8) is inserted into the interior of the first limiting ring (7); A second valve body (2), the second valve body (2) is a cylindrical structure and one end of the second valve body (2) is detachably plugged into one end of the first valve body (1); A first valve core (3) and a first return spring (4), wherein the first valve core (3) is a columnar structure and slides in the second valve body (2), an end of the first valve core (3) away from the first valve body (1) is provided with a venting groove (31) and a groove wall of the venting groove (31) is provided with a plurality of venting holes (32); one end of the first return spring (4) abuts against the other end of the first valve core (3) close to the first valve body (1) and the other end abuts against the first limiting ring (7); A second valve core (5) and a second return spring (6), wherein the second valve core (5) comprises a sealing plate (51) and a reset rod (52), wherein the sealing plate (51) slides in the second limiting ring (8); the reset rod (52) is located inside the first valve body (1) and one end of the reset rod is fixed on the plate surface of the sealing plate (51) close to the second valve body (2); the second return spring (6) is sleeved on the outer peripheral side of the reset rod (52) and one end of the reset spring is fixed on the reset rod (52), and the other end of the reset spring abuts against the second limiting ring (8).

2. A gas-specific connector according to claim 1, characterized in that: The first valve core (3) is sleeved with a blocking ring (9) on the outer peripheral side close to the first valve body (1); the first return spring (4) is sleeved on the outer peripheral side of the first valve core (3) and one end of the first return spring abuts against the blocking ring (9).

3. A gas-specific connector according to claim 2, characterized in that: It also comprises a first sealing ring (10); a first annular groove is provided on the outer peripheral side of the first valve core (3) corresponding to the blocking ring (9) and the plurality of vent holes (32); and the first sealing ring (10) is sleeved in the first annular groove.

4. A gas-specific connector according to claim 1, characterized in that: An annular fixing groove (521) is provided on the outer peripheral side of the reset rod (52) close to the second valve body (2); one end of the second return spring (6) is inserted and fixed in the fixing groove (521).

5. A gas-specific joint according to claim 1, characterized in that: It also comprises a second sealing ring (11), and a second annular groove is provided on the outer peripheral side of the sealing plate (51); the second sealing ring (11) is sleeved in the second annular groove.

6. A gas-specific joint according to claim 1, characterized in that: It also comprises a guide ring, which is detachably inserted into the first valve body (1) and abuts against the first limiting ring (7); the reset rod (52) slides in the inner hole of the guide ring.

7. A gas-specific joint according to claim 1, characterized in that: It also includes a connecting tube (12), a knob (13) and a sleeve (14); the connecting tube (12) is detachably inserted into the second valve body (2) and its insertion end abuts against one end of the first valve core (3); a through hole is provided in the middle of the knob (13), the through hole is sleeved on the outer peripheral side of the connecting tube (12) and is detachably sleeved on the outer peripheral side of the second valve body (2); the sleeve (14) is detachably sleeved on the protruding end of the connecting tube (12) away from the second valve body (2).

8. A gas-specific joint according to claim 7, characterized in that: It also includes a retaining ring, a retaining ring (15) is sleeved on the outer peripheral side of the insertion end of the connecting tube (12) close to the insertion end thereof for inserting into the second valve body (2), and a retaining groove (121) is provided on the outer peripheral side of the connecting tube (12) away from the insertion end thereof for inserting into the second valve body (2); the retaining ring is detachably sleeved in the retaining groove (121); an anti-slip ring (16) is inserted through the inner hole of the through hole, and the anti-slip ring (16) can abut against the retaining ring (15) or the retaining ring.

9. A gas-specific connector according to claim 7, characterized in that: The first valve body (1) is provided with an external thread on its outer peripheral side away from the second valve body (2) for communicating with the outside world; the sleeve (14) comprises a first sleeve section and a second sleeve section which are integrally connected, and the first sleeve section is detachably sleeved on the protruding end of the connecting tube (12) away from the second valve body (2); the diameter of the second sleeve section is larger than the diameter of the first sleeve (14) and is provided with an internal thread inside thereof for communicating with the outside world.

10. A gas-specific joint according to claim 7, characterized in that: The outer circumferences of the first valve body (1), the second valve body (2), the knob (13), the connecting tube (12) and the sleeve (14) are all plated with zinc-nickel.

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