CN207394049U - Dead load valve - Google Patents

Abstract

The utility model discloses a kind of dead load valves, it is covered including valve body and installation, the valve body includes spool chamber, air passage and exhaust duct, the exhaust duct is vertically connected with air passage, the spool chamber is located above air passage, it is provided with to control the spool of air passage and exhaust duct break-make in the spool chamber, the spool open close air flue and exhaust duct under in normal condition, the installation lid is arranged at spool upper end, the installation lid coordinates with valve body screw thread, the spool is divided into upper valve core and bottom spool, the bottom spool is ball-type, bottom spool is used to separate air passage, the upper valve core is internally provided with cavity, the cavity can be provided with the calibrated bolck that can be taken off.The application can change the weight of spool by taking the calibrated bolck in spool, and so as to play the function of changing safety valve pressure value, ball-type bottom spool causes what spool was subject to force more uniformly.

Description

Dead load valve

Technical field

The utility model is related to safety valve fields, more particularly to dead load valve.

Background technology

Safety valve is that opening and closing element is lower in normally off by external force effect, when the pressure medium rise in equipment or pipeline is super When crossing specified value, by outside system discharge medium prevent that pressure medium in pipeline or equipment is more than the particular usage valve of specified value Door.Safety valve belongs to automatic valve class, is mainly used for boiler, on pressure vessels and pipes, and control pressure is no more than specified value, to people Body safety and equipment have run important protective effect.

205136713 U of patent CN disclose a kind of safety valve, including the valve body with gas channel and are movably arranged In vivo for controlling the valve plug of the gas channel break-make in the valve, the gas channel is in inverted "L" shape, and the air-flow leads to Corner in road close to inlet port is equipped with overcurrent mouth, and the valve plug closes the overcurrent under self gravitation effect under normality Mouthful, to cut off the gas channel, the valve plug bottom is equipped with the sealing surface for being suitable for blocking the overcurrent mouth.But this safety Valve cannot adjust pressure value, if necessary to pressure value as defined in change integral replacing valve be needed to match, inconvenient, but also need The valve plug of plurality of specifications is equipped with, cost is higher.

Utility model content

The technical issues of the utility model solves is to provide a kind of dead load valve of adjustable weight.

Technical solution is used by the utility model solves its technical problem：A kind of dead load valve, including valve body It is covered with installation, the valve body includes spool chamber, air passage and exhaust duct, and the exhaust duct is vertically connected with air passage, the valve Core cavity is located above air passage, is provided with to control the spool of air passage and exhaust duct break-make, the valve in the spool chamber Core open close air flue and exhaust duct under in normal condition, the installation lid are arranged at spool upper end, the installation lid and valve body spiral shell Line coordinates, and the spool is divided into upper valve core and bottom spool, and the bottom spool is ball-type, and bottom spool is described for separating air passage Upper valve core is internally provided with cavity, and the cavity can be provided with the calibrated bolck that can be taken off.

The application can change the weight of spool by taking the calibrated bolck in spool, change safety valve pressure so as to play The function of force value, ball-type bottom spool cause what spool was subject to force more uniformly.

It is further：The spool chamber diameter is more than air passage diameter, and the lower valve core diameter is more than air passage diameter.

It is further：Pressure tank is provided between the upper valve core and bottom spool.

It is further：The cavity cross section is rectangle, and the calibrated bolck is rectangular block, and section is consistent with cavity cross section.

It is further：Mounting groove is provided in the middle part of the calibrated bolck, internal thread, the mark are provided in the mounting groove For quasi- block equipped with external bar of taking, the club head of taking is provided with external screw thread, and so-called bar of taking can match somebody with somebody with calibrated bolck screw thread It closes.

It is further：The calibrated bolck is metal derby of the weight by calibration.

The beneficial effects of the utility model are：The application relies on dead weight so as to change the break-make between air flue, simple in structure, The pressure that the bottom spool of ball-type is born is more uniformly distributed, and air-tightness is more preferable, and in addition the application can pass through the standard in spool of taking Block changes the weight of spool, and so as to play the function of changing safety valve pressure value, it is exist to increase air pressure to set pressure tank The pressure generated in annular bearing slot is opened so as to be more favorable for valve plug.

Description of the drawings

Fig. 1 is the overall schematic of dead load valve.

Fig. 2 is calibrated bolck schematic diagram.

Fig. 3 is bar schematic diagram of taking.

In figure mark for：Air passage 1, exhaust duct 2, mounting groove 4, spool 5, upper valve core 51, bottom spool 52, are held spool chamber 3 Indent 53, calibrated bolck 6.

Specific embodiment

The utility model is further illustrated with reference to the accompanying drawings and detailed description.

As shown in Figure 1, a kind of dead load valve, including valve body and installation lid 9, the valve body includes spool chamber 3, ventilation Road 1 and exhaust duct 2, the exhaust duct 2 are vertically connected with air passage 1, and shown spool chamber 3 is located at 1 top of air passage, the spool 3 diameter of chamber is more than exhaust duct diameter, is provided with to control the spool 5 of air passage 1 and 2 break-make of exhaust duct in spool chamber 3, described Spool 5 can move up and down in spool chamber, affiliated spool 5 open close air flue 1 and exhaust duct 2, peace under in normal condition Capping 9 is arranged at 3 upper end of spool chamber, and the installation lid 9 coordinates with valve body screw thread, and the spool 5 divides for upper valve core 51 and lower valve Core 52, the bottom spool 52 are ball-type, and the diameter of bottom spool 52 is more than the diameter of air passage 1, upper valve core 51 and bottom spool 52 it Between be provided with annular bearing slot 53, for bottom spool 52 for separating air passage, the upper valve core 51 is internally provided with cavity, the sky Chamber can be provided with the calibrated bolck 6 that can be taken off.

As shown in Figure 1, in normal state, since spool 5 has dead weight, spool is in the state of nature whereabouts, at this time Bottom spool 52 blocks air passage 1, since the bottom spool 52 is ball shape structure, can preferably make at air passage 1 and exhaust duct 2 In sealing state, when pressure reaches specified value, spool 5 is jacked up, so as to carry out pressure release by exhaust duct 2, the pressure Specified value is the dead weight of spool 5, pressure tank 53 is set to be in order to increase pressure of the air pressure in the interior generation of annular bearing slot 53, from And spool opening is more favorable for, in this application due to being provided with cavity in spool 5, several calibrated bolck is placed in cavity 6, the calibrated bolck 6 for weight by calibration metal derby, the weight of each calibrated bolck 6 is consistent, when need increase pressure specifications During value, required calibrated bolck 6 can be added in into cavity, when needing to reduce pressure specifications value, can be taken off respective numbers Calibrated bolck 6 need not be equipped with the spool 5 of plurality of specifications, it is not required that replace spool 5 every time, greatly reduce user Cost.

As shown in Figures 2 and 3, on the basis of the above, calibrated bolck 6 of taking for convenience is provided at the middle part of calibrated bolck 6 Mounting groove 4 is provided with internal thread in the mounting groove 4, as shown in figure 3, the calibrated bolck 6 is equipped with external bar of taking, institute It states club head of taking and is provided with external screw thread, so-called bar of taking taking out calibrated bolck can make, will take with 6 thread fitting of calibrated bolck The head of bar is screwed in the mounting groove 4 in the middle part of calibrated bolck, can facilitate taking-up, bar of taking for convenience screws, further Cavity in spool 5 is arranged to rectangle, the shape of calibrated bolck is Cubic, and section is corresponding with cavity cross section.

Particular embodiments described above has carried out into one the purpose of this utility model, technical solution and advantageous effect Step is described in detail, it should be understood that the foregoing is merely specific embodiment of the utility model, is not limited to this Utility model, within the spirit and principle of the utility model, any modification, equivalent substitution, improvement and etc. done should all wrap It is contained within the scope of protection of the utility model.

Claims (6)

1. a kind of dead load valve, including valve body and installation lid (9), the valve body include spool chamber (3), air passage (1) and Exhaust duct (2), vertically with air passage (1) and in communication, the spool chamber (3) is located on air passage (1) exhaust duct (2) Side, spool chamber (3) is interior to be additionally provided with to control the spool (5) of air passage (1) and exhaust duct (2) break-make, and the spool (5) exists The lower air passage (1) of normal condition partition and exhaust duct (2), the installation lid (9) are arranged at spool chamber (3) upper end, the installation (9) are covered with valve body screw thread to coordinate, it is characterised in that：The spool (5) is divided into upper valve core (51) and bottom spool (52), the lower valve Core (52) is ball-type, and for bottom spool (52) for separating air passage, the upper valve core (51) is internally provided with cavity, the cavity energy It is provided with the calibrated bolck (6) that can be taken off.

2. a kind of dead load valve as described in claim 1, it is characterised in that：Spool chamber (3) diameter is more than ventilation Road (1) diameter, bottom spool (52) diameter are more than air passage (1) diameter.

3. a kind of dead load valve as described in claim 1, it is characterised in that：The upper valve core (51) and bottom spool (52) Between be provided with pressure tank (53).

4. a kind of dead load valve as described in claim 1, it is characterised in that：The cavity cross section be rectangle, the mark Quasi- block (6) is rectangular block, and section is consistent with cavity cross section.

5. a kind of dead load valve as claimed in claim 4, it is characterised in that：Mounting groove is provided in the middle part of the calibrated bolck (4), internal thread is provided in the mounting groove (4), the calibrated bolck (6) is equipped with external bar of taking, the head of taking Portion is provided with external screw thread, and so-called club head of taking can be with calibrated bolck (6) thread fitting.

6. a kind of dead load valve as described in claim 1, it is characterised in that：The calibrated bolck (6) is weight by mark Fixed metal derby.