Integral end face sealed loose joint union of injection molding valve

Abstract

The utility model discloses an injection molding valve loose joint with an integrated sealed end face. The loose joint union of the injection molding valve comprises a sealing end cover made of an injection molding material, an inner joint and an outer joint, one end of the inner wall of the axial through hole of the sealing end cover is provided with a zigzag internal thread, and the other end radially protrudes to form a positioning baffle ring; a guide section is formed at the front end of a positioning shaft shoulder at the outer end of the inner joint; the outer end of the inner joint is positioned in the axial through hole and the positioning shaft shoulder is attached to the positioning baffle ring; sawtooth-shaped external threads are formed on the outer wall of the rear end of the outer connector, at least one end sealing ring is integrally formed on the side groove face of a guide groove in the front end face of the outer connector, the external threads of the outer connector are connected with internal threads of a sealing end cover, a guide groove shaft sleeve is connected with a guide section, and the outer end wall of the guide section is connected with the end sealing ring in an attached mode. The utility model has the advantages of good long-term sealing, no liquid leakage, convenient disassembly and assembly of the integrated structure, and prevention of loosening and liquid leakage through the sawtooth threads.

Description

Technical Field

[0001] The utility model relates to the field of valve connections, and particularly to an injection valve union with an integrated end face seal. Background Art

[0002] Injection valves are commonly used in liquid circuits in the photovoltaic field. The two ends of the injection valve are connected to pipelines through straight-through joints, and rubber rings are usually used for sealing at the connection points. Its defects are as follows: First, it is difficult to ensure the sealing performance of the rubber ring, and it is easy to age after long-term use, resulting in poor sealing. Poor sealing is likely to cause liquid leakage, damage equipment parts, reduce the equipment life, and seriously pollute the environment at the same time. Second, at the same time, photovoltaic equipment needs to be regularly maintained. If the connection end is disassembled multiple times, it is easy to damage the rubber ring and cause poor sealing. Third, the rubber ring and the connection end are independent and separated. Photovoltaic equipment is often placed in harsh environments, such as deserts and gobi, or rural rooftops. The rubber ring is easy to lose, making the maintenance cost of photovoltaic equipment high and the equipment utilization rate low. Content of the Utility Model

[0003] In order to solve one or more of the above problems, the utility model provides an injection valve union with an integrated end face seal.

[0004] According to one aspect of the utility model, the injection valve union with an integrated end face seal includes: a sealing end cover, an inner joint, and an outer joint made of injection molding material;

[0005] One end of the inner wall of the axial through hole of the sealing end cover is provided with serrated internal threads, and the other end radially protrudes centripetally to form a positioning retaining ring;

[0006] The inner end of the inner joint is fixedly connected to the valve body; the outer wall of the outer end of the inner joint radially protrudes centrifugally to form a positioning shoulder, and a guiding section is formed at the front end of the positioning shoulder. The outer end of the inner joint is located in the axial through hole, and its positioning shoulder is fitted and connected to the positioning retaining ring;

[0007] The outer wall of the rear end of the outer joint is formed with serrated external threads. The front end face of the outer joint is concave to form a guiding groove. At least one protruding circular end face sealing ring is integrally formed on the side groove surface of the guiding groove. The external threads of the outer joint are connected to the internal threads of the sealing end cover, and the guiding groove is sleeved on the guiding section. The outer end wall of the guiding section is fitted and connected to the end face sealing ring to form a union joint in which the pipe holes of the inner joint and the outer joint are sealed and connected to each other.

[0008] In some embodiments, the circular cross-section of the end face sealing ring is semi-circular;

[0009] Or the guiding groove is a circular groove, and the guiding section is a hollow cylindrical shape.

[0010] In some embodiments, the guiding groove and the guiding section are in an interference fit or a small clearance fit.

[0011] In some embodiments, sealant is coated on the external threads of the external joint.

[0012] In some embodiments, the sealant is any one of epoxy resin glue, thread locking agent, and anaerobic agent.

[0013] In some embodiments, the end face seal ring and the guiding groove are coaxially arranged.

[0014] In some embodiments, an internal chamfer is provided at the front end of the guiding groove.

[0015] In some embodiments, an internal seal groove that mates with the end face seal ring is provided on the front end face of the guiding section.

[0016] In some embodiments, the wall thickness of the outer end of the internal joint increases to form a first connection end. A positioning shoulder is provided on the outer peripheral wall of the first connection end, and a guiding section is formed at the front end.

[0017] The wall thickness of the inner end of the outer pipe body increases to form a second connection end. External threads are provided on the outer peripheral wall of the second connection end, and a guiding groove is formed by the inward concavity of the front end face.

[0018] In some embodiments, a number of first convex ribs and first grooves are circumferentially arrayed on the outer peripheral wall of the seal end cover, and a number of second convex ribs and second grooves are circumferentially arrayed on the outer peripheral wall of the middle section of the external joint. Description of the Drawings

[0019] Figure 1 is a three-dimensional schematic diagram of an injection-molded valve union with integral end face seal of the present utility model;

[0020] Figure 2 is Figure 1 a cross-sectional schematic diagram of the injection-molded valve union with integral end face seal shown;

[0021] Figure 3 is Figure 1 a three-dimensional schematic diagram of the seal end cover shown;

[0022] Figure 4 is Figure 1 a three-dimensional schematic diagram of the internal joint shown;

[0023] Figure 5 is Figure 1 a three-dimensional schematic diagram of the external joint shown;

[0024] Seal end cover 1, axial through hole 10, internal thread 11, positioning retaining ring 12, first convex rib 13, first groove 14;

[0025] Internal joint 2, inner pipe body 20, positioning shoulder 21, guiding section 22, first connection end 23;

[0026] External joint 3, outer tube body 30, external thread 31, guiding groove 32, end face sealing ring 33, inner chamfer 34, second convex rib 35, second groove 36, second connection end 37. Detailed implementation mode

[0027] The present utility model will be further described in detail below with reference to the accompanying drawings. It should be noted that the terms "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the directions in the drawings, and the terms "inner" and "outer" respectively refer to the directions towards or away from the geometric center of a specific component.

[0028] Figures 1 to 5 Schematically shown is an injection molded valve union with integral end face sealing according to an embodiment of the present utility model. As shown in the figure, the injection molded valve union with integral end face sealing includes: a sealing end cover 1 made of injection molding material, an inner joint 2 and an external joint 3;

[0029] One end of the inner wall of the axial through hole 10 of the sealing end cover 1 is provided with a serrated internal thread 11, and the other end radially and centripetally protrudes to form a positioning retaining ring 12;

[0030] The inner end of the inner joint 2 is fixedly connected to the valve body; the outer wall of the outer end of the inner joint 2 radially and centrifugally protrudes to form a positioning shoulder 21, the front end of the positioning shoulder 21 forms a guiding section 22, the outer end of the inner joint 2 is located in the axial through hole 10 and its positioning shoulder 21 is fitted and connected to the positioning retaining ring 12;

[0031] The outer wall of the rear end of the external joint 3 forms a serrated external thread 31, the front end face of the external joint 3 is concave to form a guiding groove 32, at least one protruding annular end face sealing ring 33 is integrally formed on the side groove surface of the guiding groove 32, and the circular ring cross section of the end face sealing ring 33 is preferably semi-circular; the guiding groove 32 is preferably a circular hole groove, and the guiding section 22 is preferably a hollow cylindrical shape;

[0032] The external thread 31 of the external joint 3 is connected to the internal thread 11 of the sealing end cover 1. And the guiding groove 32 is sleeved and connected to the guiding section 22. The guiding groove 32 and the guiding section 22 are preferably in interference fit or small clearance fit.

[0033] The outer end wall of the guiding section 22 is fitted and connected to the end face sealing ring 33, forming a union joint in which the pipe holes of the inner joint 2 and the external joint 3 are hermetically connected.

[0034] The beneficial effects of the injection-molded valve union with an integrated end face seal are as follows: First, an integrated end face seal ring 33 is used for end face sealing, and this seal structure is arranged in the guiding section 22 and the guiding groove 32, further ensuring good sealing performance. It can maintain good sealing performance for a long time, without liquid leakage during long-term use, ensuring the safety of equipment parts, increasing the service life of the equipment, and causing no environmental pollution. Second, since the two are in end face contact, the end face seal ring 33 will not be damaged during multiple disassembly and assembly, and the disassembly and assembly are convenient, ensuring the sealing performance during long-term use. Third, since the two are integrally arranged, the end face seal ring 33 is not easily damaged and is not easily lost, and the disassembly, assembly and maintenance are convenient, with strong applicability. Fourth, the serrated thread has greater locking force, preventing liquid leakage caused by the loosening and retraction phenomenon during long-term use, resulting in a sealing gap, and having better sealing performance. Fifth, the positioning shoulder 21 and the positioning retaining ring 12 can improve the installation and positioning accuracy of the two, and good assembly can further improve the sealing performance.

[0035] Furthermore, when the guiding groove 32 and the guiding section 22 are in a small clearance fit, the guiding clearance between the guiding groove 32 and the guiding section 22 is 0.1 mm.

[0036] Furthermore, sealant is coated on the external thread 31 of the external joint 3. When the external thread 31 is fully screwed into the internal thread 11, the sealant is located in the thread clearance between the external thread 31 and the internal thread 11. Preferably, sealant is coated in the guiding section 22. When the guiding groove 32 fully enters the guiding section 22, the sealant is located in the guiding clearance and bonds to the inner wall of the guiding groove 32. Preferably, the sealant is any one of epoxy resin glue, thread locking agent, and anaerobic agent. The beneficial effect is that the setting of the sealant can bond and fasten the two, without position movement during use, and further reduce the probability of generating a sealing gap, maintaining long-term sealing performance.

[0037] Furthermore, the end face seal ring 33 and the guiding groove 32 are coaxially arranged. Preferably, several end face seal rings 33 and guiding grooves 32 that are radially equally spaced are coaxially arranged. The beneficial effect is that coaxial arrangement is convenient for processing and assembly.

[0038] Furthermore, an inner sealing groove that cooperates with the end face seal ring 33 is provided on the front end face of the guiding section 22, and the groove is preferably an annular groove. The beneficial effect is that this setting further improves the sealing effect.

[0039] Furthermore, the inner joint 2 includes an annular inner tube body 20. The wall thickness of the outer end of the inner tube body 20 increases to form a first connection end 23. A positioning shoulder 21 is provided on the outer peripheral wall of the first connection end 23, and a guiding section 22 is formed at the front end. The outer joint 3 includes an annular outer tube body 30. The wall thickness of the inner end of the outer tube body 30 increases to form a second connection end 37. An external thread 31 is provided on the outer peripheral wall of the second connection end 37, and a guiding groove 32 is formed by the inward concavity of the front end face. The beneficial effect is that this setting can improve the structural strength, avoid the structural gap formed by the bending deformation of the structure, and ensure the sealing performance.

[0040] Preferably, a plurality of first convex ribs 13 and first grooves 14 are circumferentially arrayed on the outer peripheral wall of the sealing end cover 1, and a plurality of second convex ribs 35 and second grooves 36 are circumferentially arrayed on the outer peripheral wall of the middle section of the outer joint 3. The beneficial effect is that the convex ribs and grooves can facilitate the disassembly and assembly operations for the user.

[0041] The above are only some embodiments of the present invention. For those of ordinary skill in the art, without departing from the inventive concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. The flexible union of an injection valve with an integrated end face seal is characterized by: It comprises: a sealing end cover (1) made of injection molding material, an inner joint (2) and an outer joint (3); One end of the inner wall of the axial through hole (10) of the sealing end cover (1) is provided with a sawtooth-shaped internal thread (11) and the other end is radially protruded to form a positioning retaining ring (12); The inner end of the inner joint (2) is fixedly connected to the valve body; the outer wall of the outer end of the inner joint (2) protrudes radially and centrifugally to form a positioning shoulder (21), and the front end of the positioning shoulder (21) forms a guide section (22); the outer end of the inner joint (2) is located in the axial through hole (10) and its positioning shoulder (21) is closely connected to the positioning retaining ring (12); The outer wall of the rear end of the external joint (3) forms a sawtooth-shaped external thread (31), the front end surface of the external joint (3) is concave to form a guide groove (32), the side groove surface of the guide groove (32) integrally forms at least one protruding annular end sealing ring (33), the external thread (31) of the external joint (3) is connected to the internal thread (11) of the sealing end cover (1), and the guide groove (32) sleeve is connected to the guide section (22), the outer end wall of the guide section (22) is fitted and connected to the end sealing ring (33), forming a union joint in which the pipe holes of the internal joint (2) and the external joint (3) are sealed and connected to each other.

2. The flexible joint of an injection valve with an integrated end face seal according to claim 1, characterized in that: The circular cross section of the end sealing ring (33) is semicircular; Or the guide groove (32) is a circular groove, and the guide section (22) is a hollow cylindrical shape.

3. The flexible joint of an injection valve with an integrated end face seal according to claim 1, characterized in that: The guide groove (32) and the guide section (22) are interference fit or small clearance fit.

4. The flexible joint of an injection valve with an integrated end face seal according to claim 1, characterized in that: The external thread (31) of the external joint (3) is coated with sealant.

5. The flexible joint of an injection valve with an integrated end face seal according to claim 4, characterized in that: The sealant is any one of epoxy resin glue, thread locking agent and anaerobic agent.

6. The flexible joint of an injection valve with an integrated end face seal according to claim 1, characterized in that: The end sealing ring (33) and the guide groove (32) are coaxially arranged.

7. The flexible joint of an injection valve with an integrated end face seal according to claim 1, characterized in that: The front end of the guide groove (32) is provided with an inner chamfer (34).

8. The flexible joint of an injection valve with an integrated end face seal according to claim 1, characterized in that: The front end surface of the guide section (22) is provided with an inner sealing groove which matches the end sealing ring (33).

9. The flexible joint of an injection valve with an integrated end face seal according to claim 1, characterized in that: The thickness of the outer end of the inner joint (2) is increased to form a first connection end (23); the outer peripheral wall of the first connection end (23) is provided with the positioning shoulder (21) and the front end forms the guide section (22); The thickness of the inner end wall of the outer tube body (30) is increased to form a second connecting end (37), the outer peripheral wall of the second connecting end (37) is provided with the external thread (31) and the front end surface is concave to form a guide groove (32).

10. The flexible joint of an injection valve with an integrated end face seal according to claim 9, characterized in that: The outer peripheral wall of the sealing end cover (1) is provided with a plurality of first ridges (13) and first grooves (14) in a circumferential array, and the outer peripheral wall of the middle section of the external joint (3) is provided with a plurality of second ridges (35) and second grooves (36) in a circumferential array.

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