CN103573747A

CN103573747A - Embedded type explosive-proof pipe safety valve

Info

Publication number: CN103573747A
Application number: CN201310345038.8A
Authority: CN
Inventors: 曾九玉; 应建强; 王晞
Original assignee: ANHUI RUIFA TRACK TRAFFIC EQUIPMENT Co Ltd
Current assignee: ANHUI RUIFA TRACK TRAFFIC EQUIPMENT Co Ltd
Priority date: 2013-08-08
Filing date: 2013-08-08
Publication date: 2014-02-12
Anticipated expiration: 2033-08-08
Also published as: CN103573747B

Abstract

The invention discloses an embedded type explosive-proof pipe safety valve, which comprises a cylinder body, wherein the side wall of the cylinder body is provided with countersunk holes and is fixedly provided with a valve body, the bottom of each countersunk hole is led out via a pipeline, the two ends of the valve body are respectively provided with one countersunk hole and are communicated through a middle valve port, the interior of the countersunk hole at the right side of the valve body is fixedly provided with an external pipe joint, the inner wall of the countersunk hole at the left side of the valve body is provided with an annular groove and a retaining ring, the interior of the space of the countersunk hole inside the retaining ring is slidingly provided with a valve core, the valve core is sheathed with a spring, the right end surface of the valve core is fixedly provided with a valve port sealing block, the spring is in pressure contact with the bottom of the countersunk hole at the left side, the left end surface of the valve core is provided with a step-shaped countersunk hole, the hole wall of the inner side is provided with a guide hole and is communicated with the step-shaped countersunk hole and the countersunk hole at the left side of the valve body, the interior of the countersunk hole at the outer side is provided with a throttling valve, and the center of the throttling valve is provided with a through throttling hole. The safety valve has the advantages that the design of a control and protection device is simplified, the reliability and the safety are improved, the complexity is reduced, and the purchasing cost of equipment is reduced.

Description

Embedded explosion stack safety valve

Technical field

The present invention relates to high-pressure liquid and drive cylinder body field, concrete is a kind of embedded explosion stack safety valve.

Background technique

With high-pressure liquid, drive the piston rod in cylinder body to produce in the device extensive use and industrial production equipment and movable hoisting equipment of thrust (or pulling force), Fig. 1 is its schematic diagram.

Control and protection device enters cylinder body B chamber by the high-pressure liquid of pressure source by high-voltage tube B-1, pipe joint B-2, and the high-pressure liquid of simultaneously controlling cylinder body A chamber flows out by high-voltage tube A-1, pipe joint A-2, the piston rod lifting heavy that moves upward; Otherwise piston rod moves downward and falls weight.For preventing that pressure source decompression from reflux cylinder body B chamber high-pressure liquid fast, B cavity pressure declines rapidly and causes weight to fall suddenly, is provided with the protective gears such as anti-decompression reflux valve in control and protection device.But in using at the scene, because high-voltage tube is aging and foreign object impacts and makes the booster of high-voltage tube B-1, the destruction of pipe joint B-2 happens occasionally, cause weight falling accident.

Summary of the invention

For solving the deficiencies in the prior art, the present invention designs one can automatically close high-pressure liquid current return circuit when there is booster, keeps pressure to prevent the explosion stack safety valve that weight drops, and is embedded in Protective valve in cylinder body and can not be destroyed by foreign object.

Technological scheme of the present invention:

Embedded explosion stack safety valve, comprise cylinder body, it is characterized in that: on described cylinder side wall, have counterbore and be installed with valve body, derive by pipeline counterbore bottom, the two ends of described valve body are equipped with counterbore and are communicated with by middle valve port, in the counterbore on valve body right side, be installed with externally connected pipe joint, on the counterbore inwall in left side, have circular groove and be provided with back-up ring, described back-up ring is to be slidably fitted with the spool that is set with spring in interior counterbore space, on the right side of spool, be installed with sealing valve port piece, described spring pressure is contacted with the counterbore bottom in left side, on described spool left side, have step-like counterbore, on its inner side hole wall, have the counterbore that guide hole is communicated with step-like counterbore and valve body left side, in the counterbore in its outside, throttle valve is installed, throttle valve central authorities are provided with throttle orifice and run through.

Described embedded explosion stack safety valve, is characterized in that: described externally connected pipe joint, valve port, the counterbore in valve body left side, guide hole, step-like counterbore, throttle orifice, pipeline form circulation circuit.

Described embedded explosion stack safety valve, is characterized in that: between described cylinder body and valve body, by seal ring, be tightly connected.

Explosion stack safety valve is embedded into the agency part of valve in cylinder body, prevents that foreign object from impacting destruction, and when booster, safety valve can automatically cut out and keep cylinder interior pressure to prevent that weight from falling, and it has following advantage:

1. embed explosion stack safety valve on cylinder body after, can simplify the design of control and protection device, improve its reliability, Security, reduce its complexity, reduce the purchase cost of equipment;

2. the weight that control and protection device can not cause the structure middle joint of Fig. 1, high-voltage tube destruction falls and effectively protects; explosion stack safety valve directly can effectively be protected the accessory breakage of cylinder body outside with cylinder body installation one, effectively promoted the Security of equipment.

Accompanying drawing explanation

Fig. 1 is the schematic diagram of prior art of the present invention;

Fig. 2 is cross-sectional view of the present invention.

Fig. 3 is that sealing block of the present invention is in sealing state structural drawing.

Embodiment

Referring to accompanying drawing, embedded explosion stack safety valve, comprise cylinder body 1, on cylinder body 1 sidewall, have counterbore and be installed with valve body 2, derive by pipeline 1-1 counterbore bottom, the two ends of valve body 2 are equipped with counterbore and are communicated with by middle valve port 3, in the counterbore on valve body 2 right sides, be installed with externally connected pipe joint 4, on the counterbore inwall in left side, have circular groove and be provided with back-up ring 5, back-up ring 5 is to be slidably fitted with the spool 7 that is set with spring 6 in interior counterbore space, on the right side of spool 7, be installed with sealing valve port piece 8, spring 6 pressure contacts are in the counterbore bottom in left side, spool has step-like counterbore on 7 left sides, on its inner side hole wall, have the counterbore that guide hole 7-1 is communicated with step-like counterbore and valve body 2 left sides, in the counterbore in its outside, throttle valve 9 is installed, throttle valve 9 central authorities are provided with throttle orifice 9-1 and run through.

The counterbore in externally connected pipe joint 4, valve port 3, valve body 2 left sides, guide hole 7-1, step-like counterbore, throttle orifice 9-1, pipeline 1-1 form circulation circuit.

Between cylinder body 1 and valve body 2, by seal ring 10, be tightly connected.

Fig. 2 is explosion stack safety valve normal working.Explosion stack safety valve is threaded connection on cylinder body, and right-hand member is installed externally connected pipe joint by screw thread, the position of spool in the back-up ring restriction endoporus in left end endoporus, and center, endoporus right side is that path and end face are processed as valve port; Explosion stack safety valve endoporus is installed the valve body that can horizontally slip, valve body left end installs one by screw thread can change the throttle valve stimulating the menstrual flow, valve body right-hand member is installed a sealing block for closing the fluid passage of right-hand member, and the hole on valve body center hole, right-hand member external diameter, the small-diameter step of right-hand member and the hole of throttle valve form the left and right path of fluid; Spring acts on valve body the position of back-up ring, and the path of maintaining valve is unimpeded, and adjustment acting force of the spring, throttle bore diameter are determined the flow of fluid passage and the pressure difference in A chamber and B chamber.

Fig. 3 is that explosion stack safety valve cuts out guard mode.When the unexpected booster of Fig. 1 mesohigh pipe B-1 causes B cavity pressure fast-descending, the pressure difference in A chamber and B chamber increases the active force that overcomes spring and promotes valve body and move right and put right side, sealing block is close to and on valve port, closes the path that cylinder body inner fluid leaks, cylinder interior pressure is not declining and weight is being remained on to original position, and the phenomenon declining suddenly can not occur weight; Again pressurising after high-voltage tube B-1 is repaired, when pressure is greater than A cavity pressure, valve body is moved to the left and puts back-up ring place explosion stack safety valve and return to normal working.

Claims

1. embedded explosion stack safety valve, comprise cylinder body, it is characterized in that: on described cylinder side wall, have counterbore and be installed with valve body, derive by pipeline counterbore bottom, the two ends of described valve body are equipped with counterbore and are communicated with by middle valve port, in the counterbore on valve body right side, be installed with externally connected pipe joint, on the counterbore inwall in left side, have circular groove and be provided with back-up ring, described back-up ring is to be slidably fitted with the spool that is set with spring in interior counterbore space, on the right side of spool, be installed with sealing valve port piece, described spring pressure is contacted with the counterbore bottom in left side, on described spool left side, have step-like counterbore, on its inner side hole wall, have the counterbore that guide hole is communicated with step-like counterbore and valve body left side, in the counterbore in its outside, throttle valve is installed, throttle valve central authorities are provided with throttle orifice and run through.

2. embedded explosion stack safety valve according to claim 1, is characterized in that: described externally connected pipe joint, valve port, the counterbore in valve body left side, guide hole, step-like counterbore, throttle orifice, pipeline form circulation circuit.

3. embedded explosion stack safety valve according to claim 1, is characterized in that: between described cylinder body and valve body, by seal ring, be tightly connected.