CN208651722U - Inner safety-valve - Google Patents

Abstract

The utility model relates to a kind of inner safety-valves, including valve body, flap and spring pressure setting device；It is characterized by: flap uses opening up cylindrical structure, cylinder upper surface is equipped with the valve clack sealing surface that sealing is formed with sealing surface of seat, and spring pressure setting device is mounted on cylinder bore；The spring pressure setting device includes adjusting set, piston, piston rod, spring, adjusting set inner hole and piston rod periphery dynamic sealing cooperate, piston upper surface, adjusting set lower end surface, piston rod periphery, flap cylinder inner wall between constitute closed spring cavity, spring is mounted in spring cavity；Pressure chamber is constituted between piston lower surface and the bottom of cylinder of flap, which is connected to by the pressure guide hole on piston rod center and valve body with tank inner chamber, and spring cavity passes through to be connected on the outside of spiracle and tank body on piston rod and valve body.Have many advantages, such as that long service life, set-pressure are accurate, water hammer is small, sealing performance is reliable, installation space is small.

Description

Inner safety-valve

Technical field

The utility model belongs to valve field, more particularly, to a kind of inner safety-valve.

Background technique

Inner safety-valve is mostly installed at the top of groove tank car, and the main parts size of safety valve is all mounted on tank interior. Existing inner safety-valve be mounted on groove tank car in use, the main parts sizes such as its spring all directly it is exposed in the medium, be easy By the corrosion of medium, have the shortcomings that service life is short, set-pressure is inaccurate；Meanwhile the safety valve of the structure, flap It is placed in outside tank body, needs biggish installation space, and flap is easy to be destroyed by external force collision, influences service life；And it opens Water hammer or water hammer are generated during closing, generates biggish vibration, and vibration, which is hit, is easily damaged sealing surface, influences leakproofness Energy.

Summary of the invention

For technological deficiency existing in the prior art, the utility model provides a kind of with long service life, adjusting pressure Power is accurate and installation space is small, opens and closes water hammer and inner safety-valve with small vibration, that sealing reliability is good.

The technical solution of the utility model includes valve body, flap and spring pressure setting device, and valve body top is equipped with and tank The flange of body connection, valve body lower end face are equipped with sealing surface of seat, and valve inner has outlet；It is opened it is characterized by: flap uses The cylindrical structure of mouth upward, cylinder upper surface are equipped with the valve clack sealing surface that sealing is formed with sealing surface of seat, and spring pressure is whole Determine device and is mounted on cylinder bore；The spring pressure setting device includes adjusting set, piston, piston rod, spring, piston upper end Face center and the fixed seal connection of piston rod one end, the piston rod other end and valve body fixed seal connection, outside piston face and valve The cylinder inner wall dynamic sealing of valve cooperates, and seals against each other connection using screw thread between adjusting set periphery and the cylinder inner wall of flap, Adjusting set inner hole and piston rod periphery dynamic sealing cooperate, piston upper surface, adjusting set lower end surface, piston rod periphery, flap Cylinder inner wall between constitute closed spring cavity, spring is mounted in spring cavity；The bottom of cylinder of piston lower surface and flap Between constitute pressure chamber, which is connected to by the pressure guide hole on piston rod center and valve body with tank inner chamber, and spring cavity leads to The spiracle crossed on piston rod and valve body and tank body outside are connected to.

Preferably, piston rod is fixedly connected with the valve body by screw rod, and screw rod passes through on piston and piston rod upper end and valve body Pressure guide hole inner thread connects, and sealing ring is arranged between the connecting end surface between piston rod and valve body, pitch is formed with company The through-hole of pressure guide hole and pressure chamber on port valve body.

Preferably, piston and piston rod use integral structure, and valve inner, which is equipped with, reinforces shin.

Utility model has the advantages that in use, spring will not contact medium, be effectively protected spring from Corrosion has long service life, the accurate advantage of set-pressure；During open and close, water hammer or water will not be generated Phenomenon is hit, avoids generating vibration, avoids valve from generating leakage to have, sealing surface is from impact damage；The valve removes and outside Outside the flange of connection, remaining components is completely disposed inside container, has installation space small, broken from external force in use process Bad advantage.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the utility model closed state.

Fig. 2 is the structural schematic diagram of the utility model open state.

Specific embodiment

Inner safety-valve as shown in Figure 1, including valve body 1, flap 2 and spring pressure setting device, 1 top of valve body are set There is the flange connecting with tank body, 1 lower end surface of valve body is equipped with sealing surface of seat, has outlet inside valve body 1；It is characterized by: valve Valve 2 uses opening up cylindrical structure, and cylinder upper surface is equipped with the valve clack sealing surface that sealing is formed with sealing surface of seat, valve Seat sealing surface uses rubber seal ring, and spring pressure setting device is mounted on cylinder bore；The spring pressure setting device packet Include adjusting set 3, piston 6, piston rod 9, spring 5,6 upper surface center of piston and 9 one end fixed seal connection of piston rod, piston rod The cylinder inner wall dynamic sealing of 9 other ends and 1 fixed seal connection of valve body, 6 periphery of piston and flap 2 cooperates, 3 outer circle of adjusting set Connection, 3 inner hole of adjusting set and 9 periphery dynamic sealing of piston rod are sealed against each other using screw thread between face and the cylinder inner wall of flap 2 Cooperation, 6 upper surface of piston, 3 lower end surface of adjusting set, 9 periphery of piston rod, flap 2 cylinder inner wall between constitute closed bullet Spring chamber 4, spring 5 are mounted in spring cavity 4, by adjusting the screwing position between adjusting set 3 and 2 cylinder inner wall of flap, Set the set-pressure of spring pressure setting device；Pressure chamber 7 is constituted between 6 lower end surface of piston and the bottom of cylinder of flap 2, it should Pressure chamber 7 is connected to by the pressure guide hole 10 on 9 center of piston rod and valve body 1 with tank inner chamber, and pressure medium in tank body is introduced Into pressure chamber 7, when pressure medium is greater than set-pressure in tank body, pressure medium compressed spring 5 pushes flap in pressure chamber 7 2 move down, and 2 sealing surface of flap is made to lift off a seat sealing surface, and pressure medium is released to the outlet of valve body 1 in tank body, protect tank body Pressure security, as shown in Figure 2.Spring cavity 4 passes through to be connected on the outside of spiracle 11 and tank body on piston rod 9 and valve body 1.

Piston rod 9 is fixedly connected by screw rod 8 with valve body 1, and screw rod 8 passes through on piston 6 and 9 upper end of piston rod and valve body 1 10 inner thread of pressure guide hole connects, and sealing ring is arranged between the connecting end surface between piston rod 9 and valve body 1, by piston 6 and lives Stopper rod 9 and 1 fixed seal connection of valve body, 9 center of screw rod are formed with the through-hole of pressure guide hole 10 and pressure chamber 7 on connection valve body 1.

Piston 6 and piston rod 9 use integral structure, are equipped with inside valve body 1 and reinforce shin, piston rod 9 is connected to reinforcing rib Center, pressure guide hole 10 and spiracle 11 are located in reinforcing rib, are exported between adjacent two reinforcing ribs for valve body 1.

Claims (3)

1. a kind of inner safety-valve, including valve body (1), flap (2) and spring pressure setting device, valve body (1) top are equipped with The flange connecting with tank body, valve body (1) lower end surface are equipped with sealing surface of seat, have outlet inside valve body (1)；It is characterized in that: valve Valve (2) uses opening up cylindrical structure, and cylinder upper surface is equipped with the valve clack sealing surface that sealing is formed with sealing surface of seat, Sealing surface of seat uses rubber seal ring, and spring pressure setting device is mounted on cylinder bore；The spring pressure setting device Including adjusting set (3), piston (6), piston rod (9), spring (5), piston (6) upper surface center is fixed with piston rod (9) one end It is tightly connected, piston rod (9) other end and valve body (1) fixed seal connection, in the cylinder of piston (6) periphery and flap (2) The cooperation of wall dynamic sealing, is sealed against each other using screw thread between adjusting set (3) periphery and the cylinder inner wall of flap (2) and is connect, and is adjusted It covers (3) inner hole and piston rod (9) periphery dynamic sealing cooperates, piston (6) upper surface, adjusting set (3) lower end surface, piston rod (9) Periphery, flap (2) cylinder inner wall between constitute closed spring cavity (4), spring (5) is mounted in spring cavity (4)；Piston (6) pressure chamber (7) are constituted between lower end surface and the bottom of cylinder of flap (2), the pressure chamber (7) by piston rod (9) center and Pressure guide hole (10) on valve body (1) is connected to tank inner chamber, when pressure medium is greater than set-pressure in tank body, spring cavity (4) By being connected on the outside of spiracle (11) on piston rod (9) and valve body (1) and tank body.

2. inner safety-valve according to claim 1, it is characterized in that piston rod (9) is solid by screw rod (8) and valve body (1) Fixed connection, screw rod (8) passes through piston (6) and piston rod (9) upper end is connect with pressure guide hole (10) inner thread on valve body (1), Sealing ring is set between the connecting end surface between piston rod (9) and valve body (1), and screw rod (8) center is formed with connection pressure guide hole (10) with the through-hole of pressure chamber (7).

3. inner safety-valve according to claim 1 or 2, it is characterized in that piston (6) and piston rod (9) are using one knot Structure, internal be equipped with of valve body (1) reinforce shin.