CN207064743U - Prevent the high pressure unloading valve core of jam - Google Patents

Abstract

It the utility model is related to a kind of high pressure unloading valve core for preventing jam, it is characterized in that, the valve element includes set screw and cap, upper end cover, valve body, upper spring seat, lower spring cup, spring, valve element, valve seat and flange, the upper end cover is connected to form a cavity with valve body by bolt, upper spring seat, lower spring cup and spring are installed in the cavity, set screw is separately mounted on upper end cover with simultaneously cap, valve element is arranged on valve seat, the spindle nose of valve element is arranged in the axis hole of valve body, and valve body is connected with valve seat by female connector.The program employs split type valve body structure, and spring regulation part is separated with valve element, is easy to disassemble maintenance.

Description

Prevent the high pressure unloading valve core of jam

Technical field

It the utility model is related to a kind of valve element, and in particular to a kind of high pressure unloading valve core for preventing jam, belonging to prevents The high pressure unloading valve core technical field of jam.

Background technology

The principle of scale removal equipment is that rolled piece surface is sprayed using water under high pressure on hot rolling line, passes through water under high pressure Impulsive force removes the iron scale on rolled piece surface；Impact of the water under high pressure of moment high speed to pipeline is opened in order to reduce Scale removing valve, Descaling system is designed with pre- bath unit, and pre- unit of washing by water mainly is commutated by low pressure water source, check-valves, safety valve, 2/2-way Valve etc. forms, and it is in parallel with de-scaling main line, is responsible for inputting low pressure water to the main line after Scale removing valve, while extrude in pipeline Air, when Scale removing valve open, check-valves quick closedown in the presence of water under high pressure, preventing that water under high pressure from washing by water in advance into low pressure is System, cause the damage of pre- bath unit parts.So check-valves is first of protective barrier of pre- bath unit, in order to improve The reliability of pre- bath unit, often design two check-valves and be cascaded, increase again in the centre of two check-valves Add a unloading valve, once first check-valves damage causes water under high pressure to leak, unloading valve in time can drain press water.It is but real Only just worked after internal drainage of check valve, for a long time not in use, be to be in idle state during most of unloading valve on border Action, will produce incrustation scale, jam phenomenon often occurs in valve element, causes unloading valve normally to move between valve element and valve body Make.

By preliminary search, Chinese patent CN201210099831.X is disclosed《A kind of high-pressure unloading valve》, there is provided height Unloading valve is pressed, reduces the power closed needed for high-pressure unloading valve in use, reduces the labor intensity of staff, simultaneously Also reduce the use cost of high-pressure unloading valve.But as a long time without using will also result in valve element jam phenomenon.Chinese patent CN201220014607.1 is disclosed《Unloading valve and the high pressure water descaling device equipped with the unloading valve》, in order to solve existing high pressure The water descaling device reaction time is grown, the problem of pressure transient.Its essence is the 2/2-way reversal valve of a Driven by Hydraulic Cylinder, Can not solve technical problem present in prior art.

The content of the invention

The utility model is exactly for technical problem present in prior art, there is provided a kind of high pressure unloading for preventing jam Valve core, the Technical Design is ingenious, compact-sized, by by the improvement design to valve element, solving valve element jam Phenomenon.

To achieve these goals, the technical solution of the utility model is as follows, a kind of high-pressure unloading valve valve for preventing jam Core, it is characterised in that the valve element includes set screw and cap, upper end cover, valve body, upper spring seat, lower spring cup, spring, valve Core, valve seat and flange, the upper end cover and valve body are connected to form a cavity by bolt, upper spring seat, lower spring cup and Spring is installed in the cavity, and set screw is separately mounted on upper end cover with simultaneously cap, and valve element is arranged on valve seat, the axle of valve element Head is arranged in the axis hole of valve body, and valve body is connected with valve seat by female connector.After unloading valve is completed, set screw is completely loose Fall, now the length of spring is exactly the natural length of spring.

As a kind of improvement of the present utility model, the valve seat is cylinder boss, and there is a through hole at center, set at boss recessed Groove, groove side are provided with chamfering, and the case hardness of the chamfering conical surface is not less than HRC50, and the valve element is arranged to boss structure, boss There is a chamfering being engaged with the valve seat endoporus conical surface at place, and the case hardness of the conical surface is not less than HRC50, and the lower prop of valve element is provided with Four spiral guiding gutters.Beneficial to medium from the spindle nose end face that guiding gutter high speed passes through, valve element be a sphere, sphere it is outer Footpath is more smaller than the concave spherical surface internal diameter of lower spring cup, is easy to Spool rotating.Valve element needs pre- advanced with the conical surface that valve seat two cooperates Row grinding edge is matched somebody with somebody, and need to ensure effective contact area of two contact surfaces>80%, ensure sealing effectiveness.

As a kind of improvement of the present utility model, the upper lower spring cup is used for retaining spring, and the center of lower spring cup has One through hole, bottom surface set fluted sphere, two seals groove are provided with the cylinder of upper spring seat, for installing sealing.

As a kind of improvement of the present utility model, set is abutted against between valve seat and valve body and is connected, the lateral layout of female connector has row The mouth of a river.The valve body is barreled structure, and upper end cover is connected to form a cavity, upper lower spring cup and spring peace with it by bolt Loaded on wherein.There is an axis hole lower end of valve body, and axis hole is designed with seal groove and is provided with sealing.Axle on valve element can be in axis hole Move up and down.

Relative to prior art, the utility model has the following advantages that, 1）The technical scheme overall construction design is compact, skilful Wonderful, the program employs split type valve body structure, and spring regulation part is separated with valve element, is easy to disassemble maintenance；2）The skill Art scheme, using the interaction of the flow velocity and valve element guiding gutter of pressure medium, revolves valve element by regularly pressure discharge operations Transhipment is dynamic, and the incrustation scale between valve element and valve body is removed, and thoroughly solves valve element jam phenomenon；3）The technical scheme cost is relatively low, It is easy to utilize.

Brief description of the drawings

Fig. 1 is the structural representation of the present invention；

Fig. 2 is valve core structure schematic diagram of the present invention；

1- set screws in figure；2- and cap；3- upper end covers；4- upper spring seats；5- springs；6- valve bodies;7- lower spring cups； 8- valve elements；9- female connectors；10- valve seats；11- flanges.

Embodiment：

In order to deepen, to understanding of the present utility model, the present embodiment to be described in detail below in conjunction with the accompanying drawings.

Embodiment 1：Referring to Fig. 1, Fig. 2, a kind of high pressure unloading valve core for preventing jam, the valve element includes set screw 1 and cap 2, upper end cover 3, valve body 8, upper spring seat 4, lower spring cup 7, spring 5, valve element 8, valve seat 10 and flange 11, it is described on End cap 3 is connected to form a cavity with valve body 6 by bolt, and upper spring seat 4, lower spring cup 7 and spring 5 are installed on the cavity In, set screw 1 is separately mounted on upper end cover 3 with simultaneously cap 2, and valve element 8 is arranged on valve seat 10, and the spindle nose of valve element 8 is arranged on In the axis hole of valve body 6, valve body 6 is connected with valve seat 10 by female connector 9.After unloading valve is completed, set screw comes loose completely, this When spring length be exactly spring natural length.

Embodiment 2：Referring to Fig. 1, as a kind of improvement of the present utility model, the valve seat 10 is cylinder boss, and center has One through hole, groove is set, groove side is provided with chamfering, and the case hardness of the chamfering conical surface is not less than HRC50 at boss.3rd, according to power Profit requires the high pressure unloading valve core for preventing jam described in 2, it is characterised in that the valve element is arranged to boss structure, boss There is a chamfering being engaged with the valve seat endoporus conical surface at place, and the case hardness of the conical surface is not less than HRC50, and the lower prop of valve element is provided with Four spiral guiding gutters.Beneficial to medium from the spindle nose end face that guiding gutter high speed passes through, valve element be a sphere, sphere it is outer Footpath is more smaller than the concave spherical surface internal diameter of lower spring cup, is easy to Spool rotating.Valve element needs pre- advanced with the conical surface that valve seat two cooperates Row grinding edge is matched somebody with somebody, and need to ensure effective contact area of two contact surfaces>80%, ensure sealing effectiveness.

Operation principle：Referring to Fig. 1, Fig. 2, a kind of high pressure unloading valve core for preventing jam, the valve element includes regulation spiral shell Silk 1 and cap 2, upper end cover 3, valve body 8, upper spring seat 4, lower spring cup 7, spring 5, valve element 8, valve seat 10 and flange 11, off-load The flange 11 of valve is arranged on the pipeline between check-valves 1 and 2, and following steps are performed when using for the first time：

1）Confirm that pressure gauge reading is zero, close stop valve, open low pressure main valve, low pressure water is inputted, now at unloading valve In open mode, the side exit of female connector 9 can discharge water；

2）Set screw slowly is screwed, now spring gradually receives extruding, and the extruding force of spring gradually increases, until connecing The no water discharge in outlet of set 9, remembers the reading of pressure gauge, screws simultaneously cap；

3）Stop valve is opened, is normally come into operation.

As previously described, in most cases unloading valve is failure to actuate, i.e. the no water discharge in outlet of valve.De-scaling master Once pressure gauge reading increase unloading valve has water discharge after valve is opened, illustrate that check-valves 1 is interior and let out, need to be repaired in time. Another situation pressure gauge reading increase, but unloading valve delivery port does not have water discharge, illustrate the valve element of unloading valve jam, such as Fruit check-valves is also interior to be let out, and water under high pressure will be directly impinging low pressure main valve, it is easy to damage low-voltage equipment.Now only need to will simultaneously Cap 2 and set screw 1 are totally released, and valve element 8 is not led to by the extruding of spring 5, press water from the spiral shape guiding gutter on valve element 8 Cross, the interaction of the flow velocity and guiding gutter of press water, band movable valve plug 8, which is done, to be rotated at a high speed, it is possible to removes a part of incrustation scale Fall.Manual blowdown should regularly be carried out according to actual water quality situation during onsite application, be operated again after jam of trying not.This valve It can also be designed to the control mode of other forms, it is such as electronic, pneumatic, surge, only need to be by spring force removal.

The technical scheme global design is ingenious, compact-sized, has the characteristics that quickly to disconnect, be quick relief, easy to maintain； Medium system quick pressure releasing can be allowed to the safety value requirement for meeting system maintenance operations, have security；The infrastructure cost compared with It is low, dependable performance, easy for installation, easy maintenance, suitable for industrial production medium high-pressure system field, it is specially adapted to hot rolling height Press scale removal equipment.

It should be noted that above-described embodiment, is not used for limiting the scope of protection of the utility model, in above-mentioned technical side Made equivalents or replacement each fall within the scope that the utility model claims are protected on the basis of case.

Claims (5)

1. a kind of high pressure unloading valve core for preventing jam, it is characterised in that the valve element includes set screw and cap, upper end Lid, valve body, upper spring seat, lower spring cup, spring, valve element, valve seat and flange, the upper end cover are connected with valve body by bolt A cavity is formed, upper spring seat, lower spring cup and spring are installed in the cavity, and set screw is separately mounted to simultaneously cap On end cap, valve element is arranged on valve seat, and the spindle nose of valve element is arranged in the axis hole of valve body, and valve body is connected with valve seat by female connector.

2. the high pressure unloading valve core according to claim 1 for preventing jam, it is characterised in that the valve seat is that cylinder is convex There is a through hole at platform, center, sets groove at boss, groove side is provided with chamfering, and the case hardness of the chamfering conical surface is not less than HRC50。

3. the high pressure unloading valve core according to claim 2 for preventing jam, it is characterised in that the valve element is arranged to convex Platform structure, there is a chamfering being engaged with the valve seat endoporus conical surface at boss, the case hardness of the conical surface is not less than HRC50, valve element Lower prop is provided with four spiral guiding gutters.

4. the high pressure unloading valve core according to claim 3 for preventing jam, it is characterised in that the upper lower spring cup is used Carry out retaining spring, there is a through hole at the center of lower spring cup, and bottom surface sets fluted sphere, two are provided with the cylinder of upper spring seat Road sealed groove, for installing sealing.

5. the high pressure unloading valve core according to claim 4 for preventing jam, it is characterised in that leaned between valve seat and valve body Female connector is connected, and the lateral layout of female connector has discharge outlet.