CN210239711U

CN210239711U - Nitrogen safety valve for coal mine fully-mechanized mining hydraulic support

Info

Publication number: CN210239711U
Application number: CN201920837325.3U
Authority: CN
Inventors: Rongsheng Chen; 陈荣生
Original assignee: Yancheng Shenghua Coal Machinery Co Ltd
Current assignee: Yancheng Shenghua Coal Machinery Co Ltd
Priority date: 2019-06-05
Filing date: 2019-06-05
Publication date: 2020-04-03
Anticipated expiration: 2029-06-05

Abstract

The utility model discloses a nitrogen safety valve for a coal mine fully-mechanized hydraulic support, which belongs to the technical field of safety valves and comprises a valve casing, a valve core and a screw sleeve, wherein the right outer wall of the valve casing is provided with external threads, the inner side of the left part of the screw sleeve is matched with the outer side of the left part of the valve casing, and the valve casing is in threaded connection with the screw sleeve, the valve core is in sliding connection between the upper inner wall and the lower inner wall of the valve casing, the left end of the valve casing is provided with a liquid injection port, the valve casing is internally provided with a transition groove which is communicated with the liquid injection port, the left end of the valve core is provided with a pair of liquid inlets, the pair of liquid inlets are communicated with the transition groove, the upper end and the lower end of the valve core are both provided with first liquid discharge holes, the pair of first liquid discharge holes are respectively communicated with the pair of liquid inlets, the upper end and the lower end of the valve, reasonable in design, the leakproofness is good, and the practicality is strong.

Description

Nitrogen safety valve for coal mine fully-mechanized mining hydraulic support

Technical Field

The utility model relates to a relief valve technical field, more specifically say, relate to the nitrogen gas relief valve that supplies coal mine to combine to adopt hydraulic support to use.

Background

With the large-scale implementation and development of the hydraulic support along with liquefied gas, oil field exploitation and coal mine excavation, the requirement on the hydraulic equipment is more and more strict, so that further requirements on a safety valve of the protection equipment are provided, particularly higher requirements on the service life and reliability of the safety valve are provided.

The nitrogen safety valve is a valve for protecting a hydraulic support, the reliability and the service life of the safety valve are directly related to the safety and the service life of the support, when the safety valve receives pressure from the top of the hydraulic support, particularly whether the safety valve can fully unload in a short time under the high-pressure condition or not directly influences the use safety of the hydraulic support, under the long-time high-pressure condition, the hydraulic support is easy to generate noise and vibration and even damage a sealing element, and other hydraulic elements on the hydraulic support can be damaged in serious conditions so as to cause that support equipment can not normally run, the existing nitrogen safety valve is unreasonable in design and poor in sealing performance.

SUMMERY OF THE UTILITY MODEL

1. Technical problem to be solved

To the problem that exists among the prior art, the utility model aims to provide a supply the coal mine to combine the nitrogen gas relief valve that adopts hydraulic support, its reasonable in design, the leakproofness is good, and the practicality is strong.

2. Technical scheme

In order to solve the above problem, the utility model adopts the following technical scheme:

a nitrogen safety valve for a coal mine fully-mechanized mining hydraulic support comprises a valve casing, a valve core and a screw sleeve, wherein the right outer wall of the valve casing is provided with an external thread, the inner side of the left part of the screw sleeve is matched with the outer side of the left part of the valve casing, the valve casing is in threaded connection with the screw sleeve, the valve core is slidably connected between the upper inner wall and the lower inner wall of the valve casing, the left end of the valve casing is provided with a liquid injection port, a transition groove is formed in the valve casing and is communicated with the liquid injection port, the left end of the valve core is provided with a pair of liquid inlets which are communicated with the transition groove, the upper end and the lower end of the valve core are both provided with first liquid discharge holes which are respectively communicated with a pair of liquid inlets, the upper end and the lower end of the valve casing are both provided with second liquid discharge holes, the right end of the valve casing is provided with a first gas storage cavity, the right, the right-hand member of swivel nut has seted up the internal thread groove, the inflation inlet has been seted up to the tank bottom end of internal thread groove, and inflation inlet and first gas storage chamber are linked together, inflation inlet female connection has the screw rod, the left side of screw rod is equipped with sealed end cap, and fixedly connected with spring between sealed end cap and the screw rod, reasonable in design, the leakproofness is good, and the practicality is strong.

Further, first seal groove has all been seted up to the upper and lower inner wall of valve casing, and is a pair of all install first seal ring in the first seal groove, have good leakproofness.

Further, a second sealing groove is formed in the upper inner wall and the lower inner wall of the valve casing, the second sealing groove is located on the right side of the first sealing groove, and the second sealing groove is internally provided with a second sealing washer and has good sealing performance.

Further, the right-hand member fixedly connected with of screw rod changes the hand sealedly, the surface coating that changes the hand sealedly has sealed the pad, and sealed commentaries on classics hand is convenient for rotate, and sealed pad further increases the leakproofness.

Furthermore, the aperture of the inflation inlet is smaller than the diameter of the sealing plug, and the diameter of the sealing plug is smaller than that of the screw.

Further, the diameter of the valve core is smaller than that of the first air storage cavity.

3. Advantageous effects

Compared with the prior art, the utility model has the advantages of:

(1) according to the scheme, the sealing plug, the first sealing washer and the second sealing washer are arranged, so that the sealing plug has good sealing performance.

(2) This scheme passes through screw rod threaded connection in the internal thread groove, and sealed commentaries on classics hand plugs up the notch department of internal thread groove again, makes its sealed effectual.

(3) This scheme reasonable in design, the practicality is strong.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a front view of the present invention.

The reference numbers in the figures illustrate:

the gas-liquid separator comprises a valve shell 1, a valve core 2, a thread sleeve 3, a liquid injection port 4, a transition groove 5, a liquid inlet 6, a first liquid discharge hole 7, a second liquid discharge hole 8, a first sealing washer 9, a first sealing washer 10, a second sealing washer 11, a second sealing washer 12, an internal thread groove 13, a sealing plug 14, a gas charging port 15, a first gas storage cavity 16, a second gas storage cavity 17, a third gas storage cavity 18, a screw rod 19, a sealing rotating handle 20 and a spring 21.

Detailed Description

The technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiment of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention based on the embodiments of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "provided", "sleeved/connected", "connected", and the like are to be understood in a broad sense, such as "connected", which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example (b):

referring to fig. 1-2, a nitrogen safety valve for a coal mine fully-mechanized mining hydraulic support comprises a valve housing 1, a valve core 2 and a thread sleeve 3, wherein an external thread is arranged on the outer wall of the right part of the valve housing 1, the inner side of the left part of the thread sleeve 3 is matched with the outer side of the left part of the valve housing 1, the valve housing 1 is in threaded connection with the thread sleeve 3, and the valve core 2 is slidably connected between the upper inner wall and the lower inner wall of the valve housing 1, which is a known technology of a person skilled in the art and is not described in;

the left end of the valve shell 1 is provided with an injection port 4, the injection port 4 is used for injecting liquid, the valve shell 1 is internally provided with a transition groove 5, the transition groove 5 is communicated with the injection port 4, the transition groove 5 plays a role of transition connection, the left end of the valve core 2 is provided with a pair of liquid inlets 6, the pair of liquid inlets 6 is communicated with the transition groove 5, the liquid inlets 6 are used for entering the liquid, the upper end and the lower end of the valve core 2 are both provided with first liquid discharging holes 7, the pair of first liquid discharging holes 7 are respectively communicated with the pair of liquid inlets 6, the first liquid discharging holes 7 are used for discharging the liquid, the upper end and the lower end of the valve shell 1 are both provided with second liquid discharging holes 8, and the second liquid discharging holes 8 are;

the right end of the valve shell 1 is provided with a first gas storage cavity 16, the first gas storage cavity 16 is used for storing nitrogen, the diameter of the valve core 2 is smaller than that of the first gas storage cavity 16, the valve core 2 can move left and right in the first gas storage cavity 16, the right end of the valve core 2 is provided with a second gas storage cavity 17, the bottom end of the groove of the second gas storage cavity 17 is provided with a third gas storage cavity 18, and the second gas storage cavity 17 and the third gas storage cavity 18 are used for storing nitrogen;

the right end of the screw sleeve 3 is provided with an internal thread groove 13, the bottom end of the internal thread groove 13 is provided with an inflation inlet 15, the inflation inlet 15 is communicated with the first air storage cavity 16, the inflation inlet 15 is used for inflating nitrogen, the screw rod 19 is connected with the internal thread of the inflation inlet 15, the screw rod 19 is connected in the inner thread groove 13 in a threaded manner to achieve good sealing effect, the left side of the screw rod 19 is provided with a sealing plug 14, and a spring 21 is fixedly connected between the sealing plug 14 and the screw rod 19, the spring 21 has good elastic force effect, the sealing plug 14 has good sealing effect, the aperture of the inflation inlet 15 is smaller than the diameter of the sealing plug 14, the diameter of the sealing plug 14 is smaller than the diameter of the screw rod 19, the right end of the screw rod 19 is fixedly connected with a sealing rotating handle 20, the sealing rotating handle 20 is convenient to rotate, meanwhile, the sealing device has good sealing performance, the surface of the sealing rotating handle 20 is wrapped by a sealing gasket, and the sealing performance is further improved by the sealing gasket;

first seal groove 10 has all been seted up to valve casing 1's upper and lower inner wall, all installs first seal ring 9 in a pair of first seal groove 10, has good leakproofness, and second seal groove 11 has all been seted up to valve casing 1's upper and lower inner wall, and second seal groove 11 is located the right side of first seal groove 10, all installs second seal ring 12 in a pair of second seal groove 11, has good leakproofness.

The working principle is as follows: when hydraulic pressure is greater than atmospheric pressure, case 2 just can move right, the in-process of moving right again, liquid gets into aqueduct 5 through annotating liquid mouth 4, get into inlet 6 through aqueduct 5 again, get into first outage hole 7 through inlet 6 again, discharge through second outage hole 8 at last, along with the gradual discharge of liquid, hydraulic pressure diminishes gradually, thereby can be less than atmospheric pressure, case 2 just can reset, because first seal ring 9 and first seal groove 10, good sealing effect between second seal ring 12 and the second seal groove 11, in liquid can not get into first gas storage chamber 16, the utility model relates to a rationally, the leakproofness is good, the practicality is strong.

The above description is only the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution and the improvement concept of the present invention within the technical scope disclosed in the present invention.

Claims

1. The nitrogen safety valve for the coal mine fully-mechanized mining hydraulic support comprises a valve shell (1), a valve core (2) and a thread sleeve (3), and is characterized in that: the right outer wall of the valve shell (1) is provided with external threads, the left inner side of the thread sleeve (3) is matched with the left outer side of the valve shell (1), the valve shell (1) is in threaded connection with the thread sleeve (3), the valve core (2) is connected between the upper inner wall and the lower inner wall of the valve shell (1) in a sliding manner, the left end of the valve shell (1) is provided with a liquid injection port (4), a transition groove (5) is formed in the valve shell (1), the transition groove (5) is communicated with the liquid injection port (4), the left end of the valve core (2) is provided with a pair of liquid inlets (6), the pair of liquid inlets (6) is communicated with the transition groove (5), the upper end and the lower end of the valve core (2) are provided with first liquid discharge holes (7), the pair of first liquid discharge holes (7) are respectively communicated with the pair of liquid inlets (6), the upper end and the lower end of the valve shell (1) are provided, first gas storage chamber (16) have been seted up to the right-hand member of valve casing (1), second gas storage chamber (17) have been seted up to the right-hand member of case (2), third gas storage chamber (18) have been seted up to the tank bottom end of second gas storage chamber (17), internal thread groove (13) have been seted up to the right-hand member of swivel nut (3), inflation inlet (15) have been seted up to the tank bottom end of internal thread groove (13), and inflation inlet (15) are linked together with first gas storage chamber (16), inflation inlet (15) female connection has screw rod (19), the left side of screw rod (19) is equipped with sealed end cap (14), and fixedly connected with spring (21) between sealed end cap (14) and screw rod (19).

2. The nitrogen safety valve for the fully-mechanized coal mining hydraulic support of claim 1, wherein: first seal groove (10), a pair of first seal ring (9) all installed in first seal groove (10) have all been seted up to the upper and lower inner wall of valve casing (1).

3. The nitrogen safety valve for the fully-mechanized coal mining hydraulic support of claim 1, wherein: second seal groove (11) have all been seted up to the upper and lower inner wall of valve casing (1), and second seal groove (11) are located the right side of first seal groove (10), and are a pair of all install second seal ring (12) in second seal groove (11).

4. The nitrogen safety valve for the fully-mechanized coal mining hydraulic support of claim 1, wherein: the right end fixedly connected with of screw rod (19) changes hand (20) sealedly, the surface parcel of sealed commentaries on classics hand (20) has sealed the pad.

5. The nitrogen safety valve for the fully-mechanized coal mining hydraulic support of claim 1, wherein: the aperture of the inflation inlet (15) is smaller than the diameter of the sealing plug (14), and the diameter of the sealing plug (14) is smaller than the diameter of the screw (19).

6. The nitrogen safety valve for the fully-mechanized coal mining hydraulic support of claim 1, wherein: the diameter of the valve core (2) is smaller than that of the first air storage cavity (16).