Mining nitrogen safety valve with adjustable pressure

Abstract

The utility model discloses a pressure-adjustable mining nitrogen safety valve which comprises a main valve body, a main valve element, an inflation valve body and an inflation valve element, and the main valve element is arranged in the main valve body. The inflation valve body is arranged at the end, away from the pipeline connecting end of the main valve body, of the main valve body, the inflation valve body is in threaded connection with the main valve body, the end, connected with the main valve body, of the inflation valve body extends into the main valve body, a nitrogen cavity is formed between the inflation valve body and the main valve body, and the size of the nitrogen cavity is adjustable. The nitrogen safety valve has the technical effects that the structure is innovated on the basis of an original nitrogen safety valve, so that the volume of the nitrogen cavity can be adjusted, and the pressure deviation can be eliminated by adjusting the volume of the nitrogen cavity and changing the pressure of nitrogen; the main valve body and the inflation valve body are designed to be in threaded connection, the volume of the nitrogen cavity can be changed by adjusting the screwing-in depth of threads, the whole adjusting process is convenient and rapid, adjustment can be directly and rapidly completed underground, the working efficiency is greatly improved, and production is not affected.

Description

Technical Field

[0001] The utility model relates to the technical field of safety valves, in particular to a pressure-adjustable mining nitrogen safety valve. Background Art

[0002] The main structure of the existing nitrogen safety valve includes a valve body, a dust cover, a valve core, a charging valve body, a charging valve core, a circlip, a spring seat, a spring, a sealing ring, a dust cover, etc. Nitrogen is loaded to form a nitrogen spring, thereby controlling the opening pressure of the safety valve.

[0003] In actual use, the adjusted nitrogen pressure is easily affected by temperature fluctuations. In some mines, where there is a significant temperature difference between the mine and the surface environment, or when the mine's temperature fluctuates significantly, the nitrogen pressure within the safety valve fluctuates significantly, causing the valve's opening pressure to deviate from the set value, thus affecting the valve's proper operation and posing a potential safety hazard. Furthermore, if the nitrogen safety valve experiences significant pressure deviations during use, it will require refilling with nitrogen, a task rarely performed underground. If the valve is removed and then refilled with nitrogen after being lifted up, efficiency is low, severely impacting production. Utility Model Content

[0004] To this end, the utility model provides a pressure-adjustable mining nitrogen safety valve to solve the above-mentioned problems in the prior art.

[0005] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0006] According to a first aspect of the present utility model, a pressure-adjustable nitrogen safety valve for mining comprises a main valve body, a main valve core, an inflation valve body and an inflation valve core, wherein the main valve core is disposed within the main valve body;

[0007] The inflation valve body is arranged at an end of the main valve body away from the pipeline connection end thereof, and the inflation valve body is threadedly connected to the main valve body. The end of the inflation valve body connected to the main valve body extends into the main valve body, and a nitrogen cavity is formed between the inflation valve body and the main valve body, and the size of the nitrogen cavity is adjustable;

[0008] An inflation valve core is provided in the inflation valve body, and a filling port is provided at one end of the inflation valve body away from the main valve body.

[0009] Furthermore, a threaded hole is provided at one end of the main valve body away from its pipeline connection end, and an outer side wall of one end of the inflation valve body is provided with an external thread, and the external thread is adapted to the threaded hole.

[0010] Furthermore, a sealing ring is provided between the inflation valve body and the main valve body.

[0011] Further, it also includes an end cap, which is detachably connected to the filling port.

[0012] Further, the end cap is threadedly connected to the filling port.

[0013] Further, the gas charging valve body is coaxial with the main valve body.

[0014] Further, a hexagonal head is provided at one end of the gas charging valve body facing away from the main valve body.

[0015] Further, the main valve body is cylindrical.

[0016] The present utility model has the following advantages: Structural innovation is carried out on the basis of the original nitrogen safety valve, enabling the volume of the nitrogen chamber to be adjustable. By adjusting the volume of the nitrogen chamber and changing the nitrogen pressure, the pressure deviation can be eliminated; The main valve body and the gas charging valve body are designed to be threadedly connected, and the volume of the nitrogen chamber can be changed by adjusting the screwing depth of the thread; When the working environment temperature of the entire nitrogen safety valve rises (compared with the environmental temperature during nitrogen filling operation), the nitrogen pressure in the nitrogen chamber increases compared with the initial nitrogen filling pressure. At this time, the thread of the gas charging valve body can be rotated to increase the volume of the nitrogen chamber, and then the nitrogen pressure drops to the initial filling pressure; On the contrary, when the working environment temperature drops, the volume of the nitrogen chamber is adjusted to decrease, and the nitrogen pressure rises to the initial filling pressure. The entire adjustment process is convenient and fast, and can be directly completed quickly underground, greatly improving work efficiency and not affecting production. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings described below are only exemplary, and for those of ordinary skill in the art, other implementation drawings can be obtained by extending based on the provided drawings without creative efforts.

[0018] The structures, ratios, sizes, etc. illustrated in this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present utility model. Therefore, they do not have technical substance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope covered by the technical content disclosed in the present utility model without affecting the effects that the present utility model can produce and the purposes that can be achieved.

[0019] Figure 1 It is a sectional view of a pressure-adjustable mine-used nitrogen safety valve provided for some embodiments of the present utility model.

[0020] In the figure: 1. Main valve body, 2. Main valve core, 3. Inflating valve body, 4. Inflating valve core, 5. End cover, 6. Nitrogen chamber. DETAILED DESCRIPTION

[0021] The following describes the implementation of the present invention through specific embodiments. Those skilled in the art can readily understand the other advantages and benefits of the present invention from the contents disclosed in this specification. Obviously, the embodiments described are only a portion of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0022] Example 1

[0023] like Figure 1 As shown, a pressure-adjustable mining nitrogen safety valve in an embodiment of the first aspect of the present utility model comprises a main valve body 1, a main valve core 2, an inflation valve body 3 and an inflation valve core 4, wherein the main valve core 2 is disposed in the main valve body 1;

[0024] The charging valve body 3 is arranged at an end of the main valve body 1 away from its pipeline connection end, and the charging valve body 3 is threadedly connected to the main valve body 1. The end of the charging valve body 3 connected to the main valve body 1 extends into the main valve body 1. A nitrogen chamber 6 is formed between the charging valve body 3 and the main valve body 1. The volume of the nitrogen chamber 6 is adjustable. Specifically, the volume of the nitrogen chamber 6 can be adjusted by adjusting the depth of the charging valve body 3 screwed into the main valve body 1. The deeper the charging valve body 3 is screwed into the main valve body 1, the smaller the volume of the nitrogen chamber 6. Conversely, the shallower the depth of the charging valve body 3 screwed into the main valve body 1, the larger the volume of the nitrogen chamber 6.

[0025] An inflation valve core 4 is provided in the inflation valve body 3 , and a filling port is provided at one end of the inflation valve body 3 away from the main valve body 1 , and the inflation valve core 4 is used to control the opening and closing of the filling port.

[0026] In this embodiment, it should be noted that the specific structures of the main valve core 2 and the charging valve core 4 are exactly the same as the corresponding structures in the existing nitrogen safety valve;

[0027] A threaded hole is provided at one end of the main valve body 1 away from the pipe connection end thereof, and an external thread is provided on the outer side wall of one end of the inflation valve body 3, which is matched with the threaded hole.

[0028] Furthermore, the main valve body 1 is cylindrical, the inflation valve body 3 is coaxial with the main valve body 1, and a sealing ring is provided between the inflation valve body 3 and the main valve body 1, which is used to ensure a sealed connection between the inflation valve body 3 and the main valve body 1.

[0029] Further, one end of the inflation valve body 3 facing away from the main valve body 1 is provided with a hexagon head, and the hexagon head is used to provide a point of action for a wrench, so as to facilitate adjusting the screwing depth of the inflation valve body 3 into the main valve body 1 by using the wrench.

[0030] Furthermore, a lock nut is provided between the inflation valve body 3 and the main valve body 1. The lock nut is used to lock the inflation valve body 3 after adjusting the position of the inflation valve body 3, so as to prevent the inflation valve body 3 from automatically displacing during use.

[0031] The technical effects achieved by this embodiment are as follows: Based on the original nitrogen safety valve, the structure is innovated, so that the volume of the nitrogen chamber 6 can be adjusted. By adjusting the volume of the nitrogen chamber 6 and changing the pressure of nitrogen, the pressure deviation can be eliminated; the main valve body 1 and the inflation valve body 3 are designed to be threadedly connected, and the volume of the nitrogen chamber 6 can be changed by adjusting the screwing depth of the thread; when the working environment temperature of the entire nitrogen safety valve rises (compared with the environmental temperature during nitrogen filling operation), the nitrogen pressure in the nitrogen chamber 6 increases compared with the initial nitrogen filling pressure. At this time, the thread of the inflation valve body 3 can be rotated to increase the volume of the nitrogen chamber 6, and then the nitrogen pressure is reduced to the initial filling pressure; on the contrary, when the working environment temperature drops, the volume of the nitrogen chamber 6 is adjusted to shrink, and the nitrogen pressure rises to the initial filling pressure. The whole adjustment process is convenient and fast, and can be directly completed quickly underground, greatly improving the work efficiency and not affecting production.

[0032] Embodiment 2

[0033] As Figure 1 shown, another pressure-adjustable mine-used nitrogen safety valve provided in this embodiment has a structure including all the contents of Embodiment 1, and only different parts will be described below.

[0034] In this embodiment, it further includes an end cover 5. The end cover 5 is detachably connected to the filling port, and the end cover is used to seal the filling port, so as to prevent dust or foreign objects from entering the filling port.

[0035] In this embodiment, it should be noted that the end cover 5 is threadedly connected to the filling port, and a cross slot is provided at one end of the end cover 5 facing outward. The end cover 5 can be conveniently disassembled and assembled by cooperating with a screwdriver.

[0036] The technical effects achieved by this embodiment are as follows: By providing the end cover 5, it can prevent dust or foreign objects from entering the filling port and causing blockage, thereby ensuring the normal filling of nitrogen.

[0037] Although the present utility model has been described in detail with general descriptions and specific embodiments above, based on the present utility model, some modifications or improvements can be made, which are obvious to those skilled in the art. Therefore, these modifications or improvements made without departing from the spirit of the present utility model all fall within the scope of protection required by the present utility model.

[0038] The terms such as "upper", "lower", "left", "right", "middle", etc. cited in this specification are only for the convenience of clear narration and are not used to limit the scope of implementation of the present utility model. The change or adjustment of their relative relationship, without substantial change in technical content, should also be regarded as the scope of implementation of the present utility model.

Claims

1. A pressure-adjustable nitrogen safety valve for mining use, characterized in that, It comprises a main valve body (1), a main valve core (2), an inflation valve body (3) and an inflation valve core (4), wherein the main valve core (2) is arranged in the main valve body (1); The inflation valve body (3) is arranged at an end of the main valve body (1) away from its pipeline connection end, and the inflation valve body (3) is threadedly connected to the main valve body (1), and the end of the inflation valve body (3) connected to the main valve body (1) extends into the main valve body (1), and a nitrogen cavity (6) is formed between the inflation valve body (3) and the main valve body (1), and the size of the nitrogen cavity (6) is adjustable; An air charging valve core (4) is provided in the air charging valve body (3), and a charging port is provided at one end of the air charging valve body (3) facing away from the main valve body (1).

2. The pressure-adjustable nitrogen safety valve for mining use according to claim 1, characterized in that, The main valve body (1) is provided with a threaded hole at one end thereof which is away from the pipe connection end thereof, and the outer side wall of one end of the inflation valve body (3) is provided with an external thread, and the external thread is adapted to the threaded hole.

3. The pressure-adjustable nitrogen safety valve for mining use according to claim 1, characterized in that, A sealing ring is provided between the inflation valve body (3) and the main valve body (1).

4. A pressure-adjustable nitrogen safety valve for mining use according to claim 3, characterized in that, It also includes an end cover (5), which is detachably connected to the filling port.

5. The pressure-adjustable nitrogen safety valve for mining use according to claim 4, wherein, The end cover (5) is threadedly connected to the filling port.

6. The pressure-adjustable nitrogen safety valve for mining use according to claim 1, characterized in that, The inflation valve body (3) is coaxial with the main valve body (1).

7. The pressure-adjustable nitrogen safety valve for mining use according to claim 1, characterized in that, An end of the inflation valve body (3) facing away from the main valve body (1) is provided with a hexagonal head.

8. A pressure-adjustable nitrogen safety valve for mining use according to claim 1, characterized in that, The main valve body (1) is cylindrical.

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