VCR connector for plug valve

Abstract

The VCR connector for the plug valve comprises an internal thread nut, an external thread nut, a gasket and two connecting pipe assemblies, a limiting step is arranged on the internal thread nut, the internal thread nut and the external thread nut are arranged on the two connecting pipe assemblies respectively, the gasket is arranged between the two connecting pipe assemblies, and the limiting step is arranged on the gasket. The internal thread nut is in threaded fit with the external thread nut; the limiting piece and the connecting pipe are arranged to be of a detachable structure, so that the internal thread nut and the external thread nut can be sleeved conveniently, on-site maintenance can be achieved after damage, and maintenance cost is greatly reduced. The limiting piece is in threaded connection with the connecting pipe, locking of the limiting piece is achieved through the key, and therefore the limiting piece and the connecting pipe are reliably fixed. The key is provided with the connecting piece, axial movement of the key is limited through the connecting piece, and it is avoided that the key is difficult to take out during maintenance due to tight fit of the key and the key groove.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of plug valve, especially a VCR joint for plug valve. BACKGROUND

[0002] In this modern industrial era, with the continuous development of social economy and technology, the requirements for pipeline vacuum degree and cleanliness are continuously improved, and the requirements for valve vacuum degree and cleanliness are also continuously improved. At the same time, some customers also have the demand for small-diameter vacuum plug valves. The VCR joint is a vacuum connection radial sealing joint that can provide leak-free service in the range from vacuum to positive pressure, and the plug valve with the VCR joint can meet these requirements. Because the VCR joint has been connected with the flow channel of the plug valve when it leaves the factory, when the connecting piece is damaged, it cannot be repaired on site, and it needs to be returned to the factory for repair, which is high in repair cost. SUMMARY

[0003] In view of the defects of the prior art, the main purpose of the utility model is to overcome the shortcomings of the prior art, and a VCR joint for plug valve is disclosed, which comprises an internal thread nut, an external thread nut, a gasket and two connecting pipe assemblies, a limiting step is arranged on the internal thread nut, the internal thread nut and the external thread nut are arranged on the two connecting pipe assemblies respectively, the gasket is arranged between the two connecting pipe assemblies, and the internal thread nut and the external thread nut are threadedly connected.

[0004] The connecting pipe assembly comprises a connecting pipe, a limiting piece and a key, an external thread is arranged on the outer wall of the connecting pipe, the limiting piece is provided with an internal thread matched with the external thread of the connecting pipe, and the connecting pipe and the limiting piece are connected and rotationally stopped through the key.

[0005] Further, the limiting piece is axially provided with a first key groove, the connecting pipe is provided with a second key groove, and the key connects the first key groove and the second key groove.

[0006] Further, one end of the key is provided with a connecting piece, and the connecting piece is clamped and fixed with the connecting pipe.

[0007] Further, the connecting piece is a rubber ring.

[0008] Further, the connecting piece is a snap spring.

[0009] The utility model has the beneficial effects:

[0010] The utility model discloses a detachable structure is set to positioner and connecting pipe, make internal thread nut, outer thread nut can conveniently suit, further can realize on -the -spot maintenance after damaging, greatly reduce the maintenance cost. Positioner and connecting pipe adopt the thread connection, and through the key, the stop of positioner is realized, makes positioner and connecting pipe reliable fixed. The connecting piece is set on the key, and the axial movement of the key is limited through the connecting piece, avoids the difficulty of taking out when maintaining because the key and the keyway are tightly matched. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is a stereogram structure schematic view of a VCR joint for plug valve of the utility model;

[0012] Figure 2 It is a sectional view of a VCR joint for plug valve of the utility model;

[0013] Figure 3 It is the explosion schematic view of connecting pipe assembly;

[0014] Figure 4 It is a use state schematic view of a VCR joint for plug valve of the utility model;

[0015] The signs are as follows:

[0016] 1, internal thread nut, 2, outer thread nut, 3, gasket, 4, connecting pipe assembly, 41, connecting pipe, 42, positioner, 43, key, 44, connecting piece, 411, second keyway, 421, first keyway. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical scheme and advantage of the utility model more clearly, the utility model is explained in further detail below with the drawings and examples. It should be understood that the specific examples described here are only used to explain the utility model, and are not used to limit the utility model.

[0018] A VCR joint for plug valve, as shown in Figures 1-4 It includes internal thread nut 1, outer thread nut 2, gasket 3 and two connecting pipe assemblies 4, sets up position step 11 on internal thread nut 1, and internal thread nut 1 and outer thread nut 2 are set up on two connecting pipe assemblies 4 respectively, sets up gasket 3 between two connecting pipe assemblies 4, and internal thread nut 1 and outer thread nut 2 are threadedly matched;Internal thread nut 1 is pressed tightly on gasket 3 through position step 11

[0019] Two connecting pipe assemblies 4 are pressed tightly on gasket 3 by rotating internal thread nut 1 and outer thread nut 2, and the connection and sealing of pipeline are realized.

[0020] The connecting pipe assembly 4 comprises a connecting pipe 41, a limiting piece 42 and a key 43.

[0021] In an embodiment, as shown in the figure, the limiting piece 42 is axially provided with a first key groove 421, and the connecting pipe 41 is provided with a second key groove 411, and the key 43 connects the first key groove 421 and the second key groove 411. Figures 1-4

[0022] In an embodiment, as shown in the figure, in order to prevent the key 43 from moving axially after being inserted, one end of the key 43 is provided with a connecting piece 44, and the connecting piece 44 is clamped and fixed with the connecting pipe 41. Figures 1-4

[0023] In the above embodiment, the connecting piece 44 is a rubber ring. The rubber ring is sleeved on the connecting pipe 41 by using the elasticity of the rubber ring, and the sleeving position is located on the external thread part, so that the rubber ring can be reliably fixed on the connecting pipe 41 without axial displacement.

[0024] In another embodiment, as shown in the figure, the connecting piece 44 is a clasp spring. The clasp spring is generally C-shaped, and in use, the clasp spring is expanded outward by means of a tool, so that the size of the clasp spring is greater than the size of the external thread part of the connecting pipe 41, the clasp spring is moved axially, and the key 43 is inserted into the first key groove 421 and the second key groove 411, and the clasp spring is loosened and clamped on the external thread to ensure reliable fixing with the connecting pipe 41. Figures 1-4

[0025] In use, as shown in the figure, the connecting pipe 41 is fixedly connected with the plug valve by welding, or the external thread and the second key groove 411 of the same structure as the connecting pipe 41 can be directly arranged on the valve body of the plug valve. Figures 1-4 When the internal thread nut 1 or the external thread nut 2 is damaged, only the key 43 needs to be removed, the limiting piece 42 is removed, a new internal thread nut 1 or external thread nut 2 is replaced, and then the limiting piece 42 and the key 43 are reinstalled, so that the joint maintenance can be completed, and the cost is greatly reduced.

[0026] The above is only a preferred embodiment of the utility model, and is not used to limit the implementation range of the utility model; if the utility model is modified or replaced equivalently without departing from the spirit and range of the utility model, all should be covered in the protection range of the utility model claim.​​​

Claims

1. A VCR connector for a plug valve, characterized in that, The device includes an internally threaded nut, an externally threaded nut, a washer, and two connecting pipe assemblies. The internally threaded nut is provided with a limiting step. The internally threaded nut and the externally threaded nut are respectively disposed on the two connecting pipe assemblies. The washer is disposed between the two connecting pipe assemblies. The internally threaded nut and the externally threaded nut are threadedly engaged. The connecting pipe assembly includes a connecting pipe, a limiting member, and a key. The outer wall of the connecting pipe is provided with an external thread, and the limiting member is provided with an internal thread that mates with the external thread of the connecting pipe. The connecting pipe and the limiting member are connected by a key to prevent rotation.

2. A VCR connector for a plug valve according to claim 1, characterized in that, The limiting member is provided with a first keyway in the axial direction, and the connecting pipe is provided with a second keyway. The key connects the first keyway and the second keyway.

3. A VCR connector for a plug valve according to claim 1, characterized in that, A connector is provided at one end of the key, and the connector is clamped and fixed to the connecting tube.

4. A VCR connector for a plug valve according to claim 3, characterized in that, The connector is a rubber ring.

5. A VCR connector for a plug valve according to claim 3, characterized in that, The connecting component is a snap ring.

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