CN204717172U - Valve and pipeline connecting head - Google Patents

Abstract

The utility model discloses a connecting head for valves and pipelines, relates to the technical field of valves and pipeline connection devices, and comprises two semi-arc hoop shells oppositely arranged, and lugs are provided at both ends of the two hoop shells, so that There is a through hole in the middle of the lug, and all the bolt pairs in the through hole are provided with grooves in the two clamp shells, and an annular boss matching the groove is provided on the inner side of the clamp head, and the exposed end of the clamp head is The outer circular surface is provided with threads or the exposed end surface is provided with a chamfer with an angle of α, and a seal is provided between the contact surfaces of the two clamp heads. Use the threads of the exposed ends of the two clamp heads to connect the external pipelines and valves, or weld the clamp heads to the external pipelines and valve connection ends through the chamfering of the exposed end faces of the clamp heads, and the clamp shell connects the two clamp heads through the bolt pair Clamp firmly to connect wellhead valves and pipelines. The utility model has the advantages of simple structure and convenient operation, can quickly connect pipe valve parts and is convenient for disassembly and maintenance of the connected parts.

Description

Connectors for valves and pipelines

technical field

The utility model relates to the technical field of valves and pipeline connection devices, in particular to a valve and pipeline connection head.

Background technique

At present, the wellhead valves and pipelines of oil, gas, and water wells in the petroleum industry are connected in three ways: threaded, flanged, and welded. The welding connection method is simple, but it requires higher skills for the operators. The flange connection has more fastening bolts and the labor intensity is high, while the threaded direct connection operation is relatively simple.

In view of the above reasons, it will be more practical if an intermediate device between the connected parts can be provided, taking into account threaded connection and welded connection, which can quickly fasten pipe fittings and valve parts and ensure high-pressure sealing, and at the same time facilitate disassembly and maintenance of the connected parts , the utility model is born based on this kind of consideration.

Utility model content

The technical problem to be solved by the utility model is to provide a valve and pipeline connector with simple structure and convenient operation.

In order to solve the problems of the technologies described above, the technical solution adopted by the utility model is:

A connector for valves and pipelines, comprising two semi-arc hoop shells oppositely arranged, lugs are provided at both ends of the two hoop shells, a bolt pair is arranged in the middle of the lugs, and the two hoop shells pass through Bolt pair connection, two clamp shells are provided with grooves, the two clamp shells are matched with a pair of clamp heads, and the inner side of the clamp heads is provided with an annular boss matching the groove. The outer circular surface of the exposed end of the clamp head is provided with threads or the exposed end surface is provided with a chamfer with an angle of α, and a seal is provided between the contact surfaces of the two clamp heads.

Preferably, the groove in the clamp housing is a trapezoidal groove, and the stepped surfaces of the annular bosses on the inner side of the two clamp heads are inclined surfaces matching the trapezoidal groove.

Preferably, annular sealing grooves are provided on the contact surfaces of the two clamp heads, and the sealing member is a metal backing ring, and the metal backing ring is arranged in the sealing groove.

Preferably, the threads on the outer circular surface of the exposed end of the clamp head are tapered threads.

Preferably, the angle α of the exposed end surface of the clamp head is 30°.

The beneficial effects produced by adopting the above technical solution are: using the threads at the exposed ends of the two clamp heads to connect with the external pipeline and the valve, or welding the clamp head with the external pipeline and the connecting end of the valve through the chamfering of the exposed end surface of the clamp head, The trapezoidal groove in the clamp shell matches the annular boss at the end of the clamp head. The metal backing ring between the two clamp heads can meet the requirements of high pressure sealing. The clamp shell connects the two clamp heads through the bolt pair. Clamp firmly to connect wellhead valves and pipelines. The utility model has the advantages of simple structure and convenient operation. On the basis of both threaded connection and welded connection, it can be applied to fasten and seal connections between wellhead valves and pipelines of oil, gas and water wells in the petroleum industry, and can quickly connect pipe valve parts and It ensures high-pressure sealing, and at the same time, it is easy to disassemble and maintain the connected parts. It has strong practicability and is convenient for popularization and application.

Description of drawings

Fig. 1 is the structural representation of an embodiment of the utility model;

Fig. 2 is the left view of Fig. 1;

In the figure: 1-clamp shell, 2-bolt pair, 3-clamp head, 4-seal, 11-lug, 31-boss.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment, the utility model is described in further detail.

A connector for valves and pipelines as shown in Figures 1 and 2, includes two semicircular arc clamp shells 1 oppositely arranged, and lugs 11 are provided at both ends of the two clamp shells 1, and the lugs The middle part of 11 is provided with a bolt pair 2, and the two hoop shells 1 are connected by the bolt pair 2, and grooves are provided in the two hoop shells 1, and the two hoop shells 1 are matched with a pair of hoop heads 3, and the The inner side of the clamp head 3 is provided with an annular boss 31 matched with the groove, and the outer circular surface of the exposed end of the clamp head 3 is provided with a thread or the exposed end surface is provided with a chamfer with an angle of α. A seal 4 is provided between the contact surfaces of 3, and a through hole matching the inner diameter of the valve to be connected and the inner diameter of the pipeline is provided in the middle of the clamp head 3.

As a preferred structure, the groove in the clamp shell 1 is a trapezoidal groove, and the stepped surface of the annular boss 31 on the inner side of the two clamp heads 3 is an inclined surface matched with the trapezoidal groove. The annular boss 31 at the end of each clamp head 3 cooperates with the trapezoidal groove inside the clamp shell 1, and then the bolt pair 2 is used to reduce the gap between the clamp shells 1, thereby sealing the two clamp heads 3 and The parts are locked to achieve a tight and airtight connection.

In order to prevent the seal 4 from shifting, an annular sealing groove is provided on the contact surface of the two clamp heads 3, and the seal 4 is a metal backing ring, and the thickness of the metal backing ring is greater than that of the two clamp heads The depth of the sealing groove on the end surface of 3 and the metal backing ring will play a sealing role when the two clamp heads 3 are squeezed relative to each other, which can meet the requirements of high-pressure sealing.

If the clamp head 3 is to be flexibly connected to the wellhead valve and the connected part of the pipeline, the thread on the outer surface of the exposed end of the clamp head 3 is a tapered thread, which is consistent with the tapered thread of the connected part.

If it is necessary to realize the welding connection between the clamp head 3 and the wellhead valve and the connected parts of the pipeline, a chamfer with an angle α of 30° is processed on the exposed end surface of the clamp head 3, so as to facilitate the welding of the connected parts and the clamp head 3 Together.

The working principle of the utility model is as follows: when it is necessary to connect wellhead valves and pipelines to be connected, the two connected parts and the outer sides of the clamp head 3 are respectively threaded or welded, and the ends of the two clamp heads 3 are connected. Put the supporting metal backing ring into the sealing groove and close it, and finally put two semicircle arc clamp shells 1 outside the boss 31 slopes of the two clamp heads 3 to form a "full circle". The inclined surface of the trapezoidal groove inside the clamp shell 1 coincides with the external inclined surface of the upper boss 31 of the clamp head 3, and the bolts and nuts of the bolt pair 2 are tightened, and the gap between the two clamp shells 1 is reduced under the action of the external tightening force , Squeeze the paired clamp head 3 and the metal backing ring to achieve a tight and sealed connection. When the connected parts need to be disassembled, the bolt pair 2 is removed and the clamp shell 1 is removed.

To sum up, the utility model has the advantages of simple structure and convenient operation. On the basis of both screw connection and welding connection, it can be applied to fasten and seal connections between wellhead valves and pipelines of oil, gas and water wells in the petroleum industry. The thread of the exposed end of the clamp head 3 is connected to the external pipeline and the valve, or the clamp head 3 is welded to the connecting end of the external pipeline and the valve through the chamfering of the exposed end surface of the clamp head 3, and the trapezoidal groove in the clamp shell 1 is connected to the connecting end of the valve. The ring-shaped boss 31 at the end of the clamp head 3 is matched, and the clamp shell 1 clamps the two clamp heads 3 firmly through the bolt pair 2, thereby connecting the wellhead valve and the pipeline, which can quickly connect the pipe valve parts and ensure High-pressure sealing, and at the same time, it is easy to disassemble and maintain the connected parts, which has strong practicability and is convenient for popularization and application.

Claims (5)

1. a valve and pipeline connecting head, it is characterized in that: comprise two semi-circle clip shells (1) be oppositely arranged, two clip shell (1) two ends are equipped with lug (11), described lug (11) middle part is provided with bolt pair (2), two clip shells (1) are connected by bolt pair (2), groove is equipped with in two clip shells (1), two clip shells (1) coordinate with a pair hoop (3), described hoop (3) inboard is provided with and the annular boss of groove fit (31), described hoop (3) exposed junction periphery is provided with screw thread or exposes end face and is provided with the chamfering that angle is α, Sealing (4) is provided with between the surface of contact of two hoops (3), hoop (3) middle part is provided with the through hole matched with valve to be connected and pipeline internal diameter.

2. valve according to claim 1 and pipeline connecting head, is characterized in that: the groove in described clip shell (1) is trapezoidal groove, and the step surface of the annular boss (31) that described two hoops (3) are inboard is the inclined-plane coordinated with trapezoidal groove.

3. valve according to claim 1 and pipeline connecting head, is characterized in that: described two hoop (3) surface of contact are equipped with annular seal groove, and described Sealing (4) is metal gasket ring, and described metal gasket ring is arranged in seal groove.

4. valve according to claim 1 and pipeline connecting head, is characterized in that: the screw thread on described hoop (3) exposed junction periphery is taper thread.

5. valve according to claim 1 and pipeline connecting head, is characterized in that: it is 30 ° that described hoop (3) exposes end face angle [alpha].