Loose joint clamp of clamping and pressing type loose joint nut

Abstract

The utility model discloses a loose joint clamp of a clamping and pressing type loose joint nut, which comprises a base and two clamping blocks which form the loose joint clamp, and the two clamping blocks are horizontally closed and locked to enclose a clamping hole and a pressing hole which are coaxial above a shaft hole of the base; therefore, only the valve needs to be placed in the shaft hole, the connecting end is clamped and fixed through the clamping hole, then the loose joint nut is coaxially placed in the pressing hole, and the loose joint nut is pushed and pressed downwards by external force to be sleeved into the connecting end, so that the port of the loose joint nut is restrained by the pressing hole to shrink inwards to be clamped, pressed and movably connected to the connecting end; the loose joint structure comprises an outer convex ring and an inner convex ring, the outer convex ring is integrally arranged on the outer circumferential surface of the connecting end, the inner convex ring is formed in the mode that the end opening of the loose joint nut is restrained by the pressing hole to shrink inwards, the inner convex ring and the outer convex ring are mutually prevented from disengaging, and then clamping and pressing loose joint of the loose joint nut can be formed. The cable is reliable in structure, high in use strength, high in bending resistance and high in tensile property.

Description

Technical Field

[0001] The utility model relates to a fixture applicable to a union nut, in particular to a union fixture for a press - fit type union nut. Background Art

[0002] At present, when many valves are installed in some special occasions, a union structure is often required, that is, the union nut is installed at the connection end of the valve by a union method. Most of these union structures use a circular retaining ring to prevent detachment. Not only is the structural design complex, but the retaining ring is prone to looseness during assembly and use, and even the detachment of the union nut may occur. At the same time, there is no special union fixture for assembling the existing union nut. Coupled with the fact that the retaining ring for preventing detachment also affects the structural performance, the strength, bending resistance and tensile resistance of the union structure in actual use all have certain defects, which also greatly affects the reliability of the overall structure. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a union fixture for a press - fit type union nut with simple and convenient assembly, reliable structure, high strength, high bending resistance and high tensile resistance.

[0004] The technical problem of the utility model is realized through the following technical solutions:

[0005] A union fixture for a press - fit type union nut is mainly used for press - fit type union installation between the union nut and the connection end of the valve, and includes a base and two clamping blocks arranged on the top of the base. An axially vertically penetrating shaft hole is arranged in the base. The two clamping blocks are horizontally closed and locked to enclose a coaxial clamping hole and a pressing hole above the shaft hole. The valve is arranged in the shaft hole with the connection end facing upwards, and the connection end is clamped through the clamping hole. The union nut is coaxially placed in the pressing hole. The union nut is pressed down by an external force and sleeved onto the connection end, and the port of the union nut is restricted by the pressing hole to shrink inwards and is press - fit and connected to the connection end.

[0006] The clamping hole is a cylindrical hole, and the pressing hole is a conical hole with a larger upper diameter and a smaller lower diameter. The bottom hole diameter of the conical hole is larger than the diameter of the cylindrical hole, so as to form an inner limiting shoulder between the pressing hole and the clamping hole.

[0007] The port of the union nut slides down along the inner conical surface of the pressing hole and is restricted, and then shrinks inwards and is press - fit and connected to the connection end.

[0008] Each clamping block has a straight edge, and a half of the clamping hole and a half of the pressing hole are arranged on the straight edge. The two clamping blocks are horizontally closed and locked with the straight edges to enclose a coaxial clamping hole and a pressing hole.

[0009] The two clamping blocks are horizontally joined together with their straight edges to form a frustum of a cone with a larger top surface and a smaller bottom surface. A number of fastening screws for locking are provided on the periphery of the top surface of the frustum of the cone.

[0010] The fastening screws are T-shaped screws. The fastening screws are screwed onto the top of the base and press against the top surface of the clamping block to form a lock.

[0011] The top surface of the base is provided with a top hole coaxial with the shaft hole. The two clamping blocks are horizontally joined together and fitted into the top hole in a matching manner.

[0012] The top hole is a conical hole with a larger upper part and a smaller lower part. The diameter of the bottom hole of the conical hole is larger than the diameter of the shaft hole, so as to form an outer limiting shoulder between the top hole and the shaft hole.

[0013] The union clamp includes an outer convex ring integrally provided on the outer circumferential surface of the connection end and an inner convex ring formed by the port of the union nut being constricted inward under the constraint of the pressing hole. The union nut is movably sleeved on the connection end and is prevented from coming off each other by the inner and outer convex rings to form a clamping connection.

[0014] The outer circumferential surface of the port of the union nut is an outer conical surface with a smaller outer part and a larger inner part. The port is constricted inward along the inner conical surface of the pressing hole by sliding downward under the constraint of the inner conical surface, so as to form an inner convex ring.

[0015] Compared with the prior art, the utility model mainly designs a union clamp and a union structure of a clamping type union nut. Among them, the union clamp includes a base and two clamping blocks arranged on the top of the base. An axial through shaft hole is provided in the base. The two clamping blocks are horizontally joined together and locked to enclose a coaxial clamping hole and a pressing hole above the shaft hole. In this way, only need to place the valve with the connection end facing upward in the shaft hole, clamp the connection end through the clamping hole, then place the union nut coaxially in the pressing hole, and then push the union nut downward by an external force to sleeve it onto the connection end, so that the port of the union nut is constricted inward under the constraint of the pressing hole and is clamped and connected to the connection end. The union structure includes an outer convex ring integrally provided on the outer circumferential surface of the connection end and an inner convex ring formed by the port of the union nut being constricted inward under the constraint of the pressing hole. In this way, the union nut is movably sleeved on the connection end and can be prevented from coming off each other by the inner and outer convex rings to form a clamping connection. Therefore, the union structure of this clamping type union nut is assembled with a special union clamp, which is not only simple and convenient to assemble, but also has high use strength, high bending resistance and high tensile strength, so the overall structure is more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a sectional view of the union clamp.

[0017] Figure 2 It is Figure 1 the top view of

[0018] Figure 3 It is a sectional view of the base.

[0019] Figure 4 It is a sectional view of the union nut being clamped and connected to the connection end through the union clamp.

[0020] Figure 5 It is a sectional view of a ball valve with a clamped union nut.

[0021] Figure 6 It is a sectional view of the connection end.

[0022] Figure 7 It is a sectional view of the union nut. Specific implementation mode

[0023] The embodiments of the present invention will be further described in detail below with reference to the above-mentioned drawings.

[0024] As Figures 1 to 7 shown, 1. Base, 11. Axial hole, 12. Top hole, 13. Outer limit shoulder, 2. Clamping block, 21. Clamping hole, 22. Pressing hole, 23. Inner limit shoulder, 3. Fastening screw, 4. Valve, 41. Connection end, 42. Outer convex ring, 5. Union nut, 51. Inner convex ring, 52. Outer conical surface.

[0025] A union clamp for a clamped union nut mainly performs a clamped union installation between the union nut 5 and the connection end 41 of the valve 4 through a special union clamp.

[0026] Among them, the union clamp is as Figures 1 to 3 shown, including a base 1 and two clamping blocks 2 arranged on the top of the base; the base 1 is a vertically placed cylindrical base, and an axially vertically penetrating axial hole 11 is provided in the base. A top hole 12 coaxial with the axial hole is provided on the top surface of the base. The top hole is a conical hole that is larger at the top and smaller at the bottom, and the bottom hole diameter of the conical hole is larger than the diameter of the axial hole, so as to form an outer limit shoulder 13 between the top hole 12 and the axial hole 11.

[0027] The number of the clamping blocks 2 is designed to be two in this embodiment. Of course, it can also be designed to be three or four, etc. Each clamping block has a straight edge, and a half clamping hole and a half pressing hole are provided on the straight edge of each clamping block 2; in this way, when the two clamping blocks 2 are horizontally joined and locked with their straight edges, a frustum of a cone with a large top surface and a small bottom surface will be formed, and the frustum of the cone just fits and is installed in the top hole 12, and a number of fastening screws 3 for locking are provided on the periphery of the top surface of the frustum of the cone. In this embodiment, two fastening screws 3 are designed corresponding to the two clamping blocks 2 respectively.

[0028] The fastening screw 3 is a T-shaped screw. After the fastening screw is screwed tightly on the top of the base 1 and presses against the top surface of the clamping block 2, locking can be achieved. The two clamping blocks 2 can be limited in the locking position by the outer limiting shoulder 13 in the top hole 12.

[0029] Meanwhile, when the two clamping blocks 2 are locked horizontally with their straight edges together, they exactly enclose a coaxial clamping hole 21 and a pressing hole 22 above the shaft hole 11. The clamping hole and the pressing hole are also on the same vertical axis as the top hole 12 and the shaft hole 11.

[0030] The described clamping hole 21 is a cylindrical hole, and the pressing hole 22 is located above the clamping hole and is a conical hole that is larger at the top and smaller at the bottom. The bottom hole diameter of the conical hole is larger than the diameter of the cylindrical hole, thereby forming an inner limiting shoulder 23 between the pressing hole 22 and the clamping hole 21.

[0031] In this way, just as Figure 4 shown, the valve 4 is arranged in the shaft hole 11 with the connecting end 41 facing upward, and the connecting end 41 is clamped through the clamping hole 21. Then the union nut 5 is placed coaxially in the pressing hole 22. Then, by the external force provided by the press, the union nut 5 is pushed downward to be sleeved on the connecting end 41, so that the port of the union nut 5 can slide downward along the inner conical surface of the pressing hole 22 and be restricted, and then the port is inwardly constricted and clamped and fastened to the connecting end 41. Thus, the connection structure of the clamping type union nut 5 is formed, and the downward pressing position of the union nut 5 in the pressing hole 22 can also be limited by the inner limiting shoulder 23.

[0032] The described connection structure is as Figures 5 to 7 shown, mainly selecting a ball valve structure with a clamping type union nut, which includes an outer convex ring 42 integrally arranged on the outer circumferential surface of the connecting end 41 of the ball valve and an inner convex ring 51 formed by the port of the union nut 5 being restricted by the pressing hole 22 and inwardly constricted. The inner diameter of the inner convex ring is smaller than the outer diameter of the outer convex ring. In this way, the union nut 5 is movably sleeved outside the connecting end 41 and can be prevented from coming off by the mutual restraint of the inner and outer convex rings, that is, a connection structure where the union nut 5 can move but does not fall off is achieved.

[0033] In addition, the outer circumferential surface of the port of the union nut 5 is an outer conical surface 52 that is smaller outside and larger inside, and the port slides downward along the inner conical surface of the pressing hole 22 and is restricted, thereby making it easier for the port to be inwardly constricted to form the inner convex ring 51.

[0034] Since the inner convex ring 51 realizes the connection structure by using the metal deformation of the union nut 5 itself, the union nut 5 is not easy to fall off and the structure is simpler.

[0035] Obviously, the union structure of this compression type union nut of the utility model is assembled with a special union fixture. Compared with the traditional union structure that uses a circular retaining ring to prevent disconnection, it is not only simple and convenient to assemble, but also has high use strength, high bending resistance and high tensile strength. Therefore, the overall structure is more reliable.

[0036] The above are only specific embodiments of the utility model. Those skilled in the art should understand that any structural design equivalent to this embodiment should be included in the protection scope of the utility model.

Claims

1. A clamp for a compression-type union nut, mainly used for the compression-type union installation between a union nut (5) and a connecting end (41) of a valve (4), characterized in that: It comprises a base (1) and two clamping blocks (2) arranged on the top of the base; The base (1) is provided with an axial hole (11) which penetrates vertically along the axial direction; The two clamping blocks (2) are horizontally closed and locked together to enclose a coaxial clamping hole (21) and a pressing hole (22) above the shaft hole (11); The valve (4) is arranged in the shaft hole (11) with the connecting end (41) facing upward, and the connecting end (41) is clamped through the clamping hole (21); The movable nut (5) is coaxially placed in the pressing hole (22), and the movable nut (5) is pressed downward by an external force into the connecting end (41), and the end of the movable nut (5) is constrained by the pressing hole (22) to shrink inwardly and be pressed and connected to the connecting end (41).

2. A joint fixture for a compression-type joint nut according to claim 1, characterized in that The clamping hole (21) is a cylindrical hole, and the pressing hole (22) is a conical hole that is larger at the top and smaller at the bottom. The bottom hole diameter of the conical hole is larger than the hole diameter of the cylindrical hole, thereby forming an inner limit shoulder (23) between the pressing hole (22) and the clamping hole (21).

3. A joint fixture for a compression-type joint nut according to claim 2, characterized in that The end of the movable nut (5) is constrained to slide downward along the inner conical surface of the pressing hole (22), and then shrinks inward and is pressed and movable at the connection end (41).

4. A joint fixture for a compression-type joint nut according to claim 1, characterized in that Each of the clamping blocks (2) has a straight edge, on which half a clamping hole and half a pressing hole are provided. The two clamping blocks (2) are horizontally brought together and locked with the straight edges to enclose a coaxial clamping hole (21) and a pressing hole (22).

5. A joint fixture for a compression-type joint nut according to claim 4, characterized in that The two clamping blocks (2) are horizontally brought together with straight sides to form a truncated cone with a large top surface and a small bottom surface. The periphery of the top surface of the truncated cone is provided with a plurality of fastening screws (3) for locking.

6. A joint fixture for a compression-type joint nut according to claim 5, characterized in that The fastening screw (3) is a T-shaped screw, which is screwed onto the top of the base (1) and presses the top surface of the clamping block (2) to form a locking structure.

7. A joint fixture for a compression-type joint nut according to claim 5, characterized in that The top surface of the base (1) is provided with a top hole (12) coaxial with the shaft hole (11), and the two clamping blocks (2) are horizontally close together and fit in the top hole (12).

8. A joint fixture for a compression-type joint nut according to claim 7, characterized in that The top hole (12) is a conical hole that is larger at the top and smaller at the bottom. The bottom hole diameter of the conical hole is larger than the diameter of the shaft hole, thereby forming an external limit shoulder (13) between the top hole (12) and the shaft hole (11).

9. The movable joint fixture of a compression type movable joint nut according to claim 1, characterized in that: It comprises an outer convex ring (42) which is integrally arranged on the outer circumferential surface of the connection end (41) and an inner convex ring (51) which is formed by the end of the slewing nut (5) being constrained by the pressing hole (22) and shrinking inwardly. The slewing nut (5) is movably sleeved on the outside of the connection end (41) and is locked by the inner and outer convex rings to form a clamping connection.

10. A joint fixture for a compression-type joint nut according to claim 9, characterized in that The outer circumferential surface of the port of the movable nut (5) is an outer conical surface (52) which is smaller on the outside and larger on the inside, and the outer conical surface is constrained to slide downward along the inner conical surface of the pressing hole (22), thereby causing the port to shrink inwardly to form an inner convex ring (51).

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