CN2775424Y

CN2775424Y - Buried polyethylene pipeline system low torque PE ball valve

Info

Publication number: CN2775424Y
Application number: CN 200520005268
Authority: CN
Inventors: 王建刚
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-03-07
Filing date: 2005-03-07
Publication date: 2006-04-26
Anticipated expiration: 2015-03-07

Abstract

The utility model relates to a buried polyethylene pipeline system low torque PE ball valve. A main body comprises an electric melting telescope-feed valve body, two different diameter tail end connection pipes, a ball valve core, a valve rod and a manipulator, wherein an electric heating coil is arranged in the electric melting telescope-feed valve body; bump supporting and inserting ports are arranged on the two different diameter tail ends connection pipes; the tail ends of the two different diameter tail end connection pipes are assembled with NBR L-shaped sealing rings and sealing and supporting rings; the lower end of the valve rod is connected with the ball valve core; the middle part of the valve rod is additionally provided with three NBR O-shaped sealing rings; the valve rod is vertically extended with the valve body upward; the upper end of the valve rod is connected with the manipulator; two NBR O-shaped sealing rings are arranged between a lower end port of the manipulator and the electric melting telescope-feed valve body; the connection position of the lower end of the valve rod and the valve body is also provided with a dust-proof NBR O-shaped sealing ring; the electric heating coil in the electric melting telescope-feed valve body is an electric heating wire which is laid and is fused with the electric melting telescope-feed valve body into integration. Consequently, the utility model improves welding quality, sealing performance and stability of torque parameters of the ball valve. The utility model reduces friction force by enhancing precision of surface roughness of the NBR L-shaped sealing contact faces and realizes low torque PE ball valves.

Description

The low moment of torsion PE ball valve of buried polyethylene pipe system

Technical field

The utility model relates to the low moment of torsion PE ball valve of buried polyethylene pipe system of a kind of gas pipeline system, water supply piping system.

Background technique

Along with applying of polyethylene pipe system, the Professional visitors is to the accessory requirement in the polyethylene pipe system, and also more and more stricter, especially in the gas pipeline system, people have become very important problem to the quality requirement of its accessory.In recent years, the polythene PE ball valve was widely used in feedwater, the gas pipeline system, and the accident that causes because of the pipe-line system quality problems also happens occasionally, so, must the high-quality polyethylene pipe system of design.The polythene PE ball valve is one of accessory important in the polyethylene pipe system, and its product quality problem has caused people's attention all the more, and in the disclosed patented technology of China, the polythene PE ball valve all exists following technological deficiency:

1, main body is taked the polythene PE ball valve of hot melt docking mode welding, is difficult to control and adjust the welding gap very accurately, and to open moment of torsion excessive and can't open if the gap less than specified value, then will inevitably be caused; If the gap, then can cause the relatively poor even leakage of sealability greater than specified value, simultaneously, reject rate also can be high;

2, main body is taked the polythene PE ball valve of electric smelting welding manner welding, also control very much and adjust the concentricity of terminal adapter of reducing and valve body, if depart from concentricity, take over sealing seat and spool ball sealing contact surface because of departing from concentric unbalance stress if reducing is terminal, then can cause the unlatching moment of torsion excessive and can't open or cause the relatively poor even leakage of sealability;

3, no matter main body is to take the welding of hot melt docking mode, still take the polythene PE ball valve of electric smelting welding manner welding, if two-way locating stud is taked in the upper and lower end of valve ball core, so, in fusion process, reducing is terminal to be taken over sealed at both ends surface of contact and is difficult to stress equalization with valve ball core surface of contact, and this will inevitably cause, and to cause opening moment of torsion excessive or sealability is relatively poor because of valve ball core two ends surface of contact unbalance stress, even leakage;

4, main body is taked the polythene PE ball valve of electric smelting welding manner welding, if slightly making, reducing terminal adapter sealing seat and valve ball core surface of contact spend greatly, then frictional force increases, in the medium transport process, if ball valve is in closed condition, so, the valve ball core is easy to produce a kind of skid force under the pressure of medium, increase torque force, and caused ball valve to be difficult to open.

5, the distressed structure type of polythene PE ball valve, the two ends exhaust stack diffuse that valve upper end PE interface is not easy to very that site operation is suppressed, test etc.

Summary of the invention

In order to solve the problem of above-mentioned existence, the utility model provides a kind of buried polyethylene pipe system low moment of torsion PE ball valve, makes the ball valve open and close torque less, and it is higher to improve ball valve welding quality compressive strength, and sealability is splendid.

The technological scheme that the utility model adopted is, the low moment of torsion PE ball valve of a kind of buried polyethylene pipe system, main body comprises the telescopic valve body of electric smelting, two terminal adapters of reducing, the valve ball core, valve rod and operator, be equipped with the valve ball core in the telescopic valve body of wherein said electric smelting, the valve rod lower end links to each other with the valve ball core, the intermediate portion adds three road NBR " O " RunddichtringOs, valve rod stretches out valve body vertically upward, the valve rod upper end links to each other with the operator of standard, be provided with dustproof NBR " O " RunddichtringO of twice between operator lower end mouth and the valve body, the valve rod lower end also is provided with dustproof NBR " O " RunddichtringO with valve body (1) jointing, and wherein the electrically-heated coil (6) in the telescopic valve body of electric smelting (1) is that an electric heating wire mode is laid.

Further the utility model PE ball valve adopts all-pass directly to design, thereby has thoroughly solved the flow loss that causes because of non-latus rectum problem.

Be provided with cross spacing step and the vertically setting of adjustment concentricity between valve body and reducing end are taken over, guarantee the sealing of the stable and ball valve of ball valve unlatching torsional moment parameter.

Terminal NBR " L " RunddichtringO of taking over of reducing and seal ring support ring and valve ball core constitute black box, by improve sealing contact surface slightly degree of making precision, reduce friction, reduce moment of torsion, thereby realized being difficult to the unlatching problem because of what carry that skid force that cut-off state produced causes.

Improved structure product of the present utility model, the valve terminal of diffusing of two ends exhaust stack is diffused and mouthful is taked the metal insert internal thread interface, thereby has thoroughly solved the problem of suppressing inconvenience in the work progress because of the plastics interface.

The utility model compared with prior art, its beneficial effect is, make open and close torque less, sealability is splendid, compressive strength is higher, has solved the flow loss that non-latus rectum causes, thereby valve body adopts an electric heating wire wire laying mode to improve the welding quality of ball valve, reduce the reject rate of product, solved simultaneously in the work progress and suppressed inconvenient problem because of the plastics interface.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the improved structure schematic representation of the utility model Fig. 1;

Fig. 3 for the lengthening operator A to view.

Mode of execution

Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail, as shown in Figure 1, the utility model main body comprises: the telescopic valve body 1 of electric smelting, two terminal adapters 2 of reducing, valve ball core 3, valve rod 4 and operator 5, be provided with electrically-heated coil 6 in the telescopic valve body 1 of described electric smelting, two terminal 2 upper ends of taking over of reducing are equipped with projection joint socket 7, end is equipped with NBR " L " RunddichtringO 8 and seal ring support ring 9, valve rod 4 lower ends link to each other with valve ball core 3, the position, intermediate portion adds three road NBR " O " RunddichtringOs 10, valve rod 4 stretches out valve body 1 vertically upward, valve rod 4 upper ends link to each other with the operator 5 of standard, be provided with dustproof NBR " O " RunddichtringO 11 of twice between operator 5 lower end mouth and the valve body 1, valve rod 4 lower ends also are provided with dustproof NBR " O " RunddichtringO 12 with valve body 1 jointing; 2 of the terminal adapters of valve body 1 and reducing are provided with two cross spacing interface steps 13 and two longitudinal spacing interface rings 14, guarantee the stability of ball valve unlatching torsional moment parameter and the sealing of ball valve, the concentricity of control and terminal adapter 2 of adjustment reducing and valve body 1; Being provided with electrically-heated coil 6 in the telescopic valve body 1 of its electric smelting, with terminal 2 two ends of inserting the telescopic valve body 1 of electric smelting of taking over of reducing, is one through energising and disposable welding.

Electrically-heated coil 6 adopts an electric heating wire mode to connect up in the telescopic valve body 1 of described electric smelting, and its center, electrically-heated coil 6 lines footpath external diameter is greater than valve body 1 inner chamber maximum exterior surface.This wire laying mode has not only been avoided the welding hidden danger that traditional coiling caused, as the electric heating wire solder shorts is common problem, and wire laying mode of the present utility model has thoroughly solved this problem, the most important thing is to solve bring and the uncontrollable hidden danger of quality of all welding processes.

The terminal adapter of reducing in the described black box has NBR " L " RunddichtringO 8, the sealing configuration that seal ring support ring 9 and valve ball core 3 constitute, improve the precision of the slightly degree of making of sealing contact surface greatly, reduce friction, thereby realize reducing the purpose of opening moment of torsion, be NBR " L " RunddichtringO 8 surface of contact and the valve ball core 3 surface of contact tangent directions and the accurate design of the same plane included angle employing of horizontal axis line 30-60 scale of the terminal adapter 2 of reducing, NBR " L " RunddichtringO 8 surface of contact and valve ball core 3 surface of contact turnning and milling direction Vertical direction roughness adopt 0.25～1.25 μ m design standard, avoided ball valve being under the cut-off state, produce excessive skid force because of pipe-line system pressure causes valve ball core 3 greatly, make ball valve open problems such as moment of torsion increase.The utility model is by the precision of the slightly degree of making of change sealing contact surface, the way that reduces friction, and more effective this difficult problem that solved.

Terminal 2 NBR " L " RunddichtringO 8 and seal ring support ring 9 formation sealing valve ball core print seats taken over of described reducing, seal ring support ring 9 takes to insert permanent locking design, be that terminal 2 interfaces, one end of taking over of reducing is provided with the groove ring, seal ring support ring 9 interfaces one end is provided with protruding ring, its protruding ring part external diameter is greater than terminal 2 interfaces, the one end inwall internal diameter of taking over of reducing, and less than groove ring internal diameter, the two reaches permanent bond by the pressure effect, its objective is and guarantee the terminal adapter 2 of reducing, NBR " L " RunddichtringO 8 and seal ring support ring 9 integrated prevents that seal ring 8 from coming off out from the groove seat.

The telescopic valve body 1 of described electric smelting and reducing be terminal take over 2 be provided with the cross spacing interface rings step 13 of the sealing of adjusting the stability of opening the torsional moment parameter and ball valve and control reducing terminal take over 2 with the longitudinal spacing interface rings 14 of the concentricity of valve body 1.Its purpose is exactly in order to solve laterally assembling parameter and the vertically variation of concentricity parameter in the assembling process, also to have solved the malformation that causes because of the welding heating simultaneously.

Accept exhaust stack 21 on the joint socket 7 of described the utility model improved structure product, on the exhaust stack 21 for diffusing ball valve 15, an end that wherein diffuses ball valve 15 and exhaust stack 21 weldings adopts joint socket 16, the other end adopts disposable injection moulding metal insert internal thread interface 17, in metal insert internal thread interface 17 upper ends metal insert outside thread spiral cover 18 is arranged.Thereby thoroughly solved the problem of suppressing inconvenience because of the plastics interface.Lengthening valve rod 19 is taked modular type, and its purpose is to solve different because of domestic south, backlands district temperature contrast and execution conditions and job specfication, according to user's demand, can arbitrarily adjust the length of valve rod 19 before the product export.As shown in Figure 3, in order to reduce the size of running torque, lengthening operator 20 is taked the multi-gear kind of drive, and the gear transmission number of teeth designs with 1: 5～1: 30 ratio, thereby the moment of torsion of operator is obviously reduced.

The utility model is not limited to the foregoing description, and for the professional workforce in present technique field, any improvement that the utility model embodiment is made or change can not exceed the protection domain of spirit of the present utility model and claims.

Claims

1, the low moment of torsion PE ball valve of a kind of buried polyethylene pipe system, main body comprises the telescopic valve body of electric smelting (1), two terminal take over (2) of reducing, valve ball core (3), valve rod (4) and operator (5), be provided with electrically-heated coil (6) in the telescopic valve body of wherein said electric smelting (1), two terminal (2) upper ends of taking over of reducing are equipped with projection joint socket (7), two terminal ends of taking over (2) of reducing are equipped with NBR " L " RunddichtringO (8) and sealing support ring (9), valve rod (4) lower end links to each other with valve ball core (3), the intermediate portion adds three road NBR " O " RunddichtringOs (10), valve rod (4) stretches out valve body (1) vertically upward, valve rod (4) upper end links to each other with operator (5), be provided with dustproof NBR " O " RunddichtringO (11) of twice between operator (5) lower end mouth and the telescopic valve body of electric smelting (1), valve rod (4) lower end also is provided with dustproof NBR " O " RunddichtringO (12) with valve body (1) jointing, it is characterized in that the electrically-heated coil (6) in the telescopic valve body of electric smelting (1) is that an electric heating wire is laid.

2, the low moment of torsion PE ball valve of buried polyethylene pipe system according to claim 1 is characterized in that center, electrically-heated coil (6) line footpath external diameter is greater than valve body (1) inner chamber maximum exterior surface.

3, the low moment of torsion PE ball valve of buried polyethylene pipe system according to claim 1 is characterized in that terminal NBR " L " RunddichtringO (8) surface of contact on (2) and valve ball core (3) surface of contact tangent direction and the same plane included angle of horizontal axis line taken over of reducing is 30～60 to spend.

4, the low moment of torsion PE ball valve of buried polyethylene pipe system according to claim 1 is characterized in that terminal the adapter between (2) of telescopic valve body of electric smelting (1) and reducing is provided with cross spacing interface step (13) and longitudinal spacing interface rings (14).

5, the low moment of torsion PE ball valve of buried polyethylene pipe system according to claim 4, it is characterized in that the reducing end is taken over (2) and seal ring support ring (9) is taked the permanent locking of socket joint, the protruding ring that is about to seal ring support ring (9) interface one end locks in the groove ring of the terminal adapter of reducing (2) interface one end, and becomes one.

6, according to claim 1, the low moment of torsion PE ball valve of 2 or 3 described buried polyethylene pipe systems, it is characterized in that accepting on the joint socket (7) exhaust stack (21), exhaust stack (21) upper end is for diffusing ball valve (15), an end that diffuses ball valve (15) and exhaust stack welding adopts joint socket (16), and the other end adopts disposable injection moulding metal insert internal thread interface (17) and metal insert outside thread spiral cover (18).

7, the low moment of torsion PE ball valve of buried polyethylene pipe system according to claim 6, it is characterized in that the low moment of torsion PE ball valve of buried polyethylene pipe system for the above specification of 160mm, on valve rod (4), there is a lengthening valve rod (19) to be modular type, end tooth wheel operation device (20) is not taked the multi-gear kind of drive, and velocity ratio is 1: 5～1: 30.