Pressure reducing valve

Abstract

The utility model relates to the technical field of valves, and discloses a pressure reducing valve which comprises a valve body, a containing space is formed in one side of the valve body, a feeding hole is formed in the side, away from the containing space, of the valve body, a discharging hole communicated with the containing space is formed in the side face of the valve body, and a valve deck is arranged on the side, away from the feeding hole, of the valve body. A connecting outer sleeve is arranged on the side, away from the valve deck, of the valve body, a through hole aligned with the feeding hole is formed in the connecting outer sleeve, and a valve element structure used for blocking the through hole and a pressure reducing structure used for adjusting pressure are arranged in the containing space. The valve element structure comprises a piston rod arranged in the containing space, the pressure reducing structure comprises a spring and a pressing sleeve which are arranged in the containing space, the pressing sleeve is arranged on the side, away from the valve deck, of the piston rod, one end of the spring abuts against the pressing sleeve, and the other end of the spring abuts against the valve deck. The method has the effect of improving the safety performance.

Description

Technical Field

[0001] The present application relates to the technical field of valves, and in particular to a pressure reducing valve. Background Art

[0002] The IG541 gas fire extinguishing system is a mixed gas fire extinguishing system, in which the IG541 gas fire extinguishing agent is a mixture of nitrogen (N2), argon (Ar) and carbon dioxide (CO2) in the atmosphere in the proportion of 52%, 40% and 8% respectively.

[0003] The storage pressure of IG541 gas fire extinguishing agent is 20MPa (20℃), and its maximum working pressure is 23.2MPa (50℃).

[0004] A valve used in an IG541 gas fire extinguishing system in the related art includes a valve body and a valve core, wherein the valve core is arranged inside the valve body. The valve is opened or closed by controlling the valve.

[0005] The fire extinguishing agent is output from the fire extinguishing system at a high pressure, which causes the fire extinguishing agent to be released quickly due to excessive pressure, which may cause pressure waves to injure personnel or damage equipment. Utility Model Content

[0006] In order to improve the safety performance of the valve, the present application provides a pressure reducing valve.

[0007] The present application provides a pressure reducing valve, which adopts the following technical solution:

[0008] A pressure reducing valve comprises a valve body, a accommodating space is formed on one side of the valve body, a feed hole is formed on the side of the valve body away from the accommodating space, a discharge hole connected to the accommodating space is formed on the side of the valve body, a valve cover is arranged on the side of the valve body away from the feed hole, a connecting sleeve is arranged on the side of the valve body away from the valve cover, a through hole aligned with the feed hole is formed on the connecting sleeve, a valve core structure for blocking the through hole and a pressure reducing structure for adjusting pressure are arranged in the accommodating space; the valve core structure comprises a piston rod arranged in the accommodating space, the pressure reducing structure comprises a spring and a compression sleeve arranged in the accommodating space, the compression sleeve is arranged on the side of the piston rod away from the valve cover, one end of the spring abuts against the compression sleeve, and the other end of the spring abuts against the valve cover.

[0009] By adopting the above technical solution, the through hole can be blocked or opened by the valve core structure; when the fire extinguishing agent enters from the connecting sleeve, the fire extinguishing agent drives the piston rod and the compression sleeve to move, and the compression sleeve drives the spring to compress and deform, and the spring applies a force opposite to the feeding direction to the piston rod, thereby offsetting part of the feeding pressure, slowing down the release speed of the fire extinguishing agent, reducing the probability of equipment damage, reducing the probability of injury to workers, and improving safety performance.

[0010] Optionally, a limiting column is arranged on the end surface of the compression sleeve facing the spring, and the spring sleeve is arranged outside the limiting column.

[0011] By adopting the above technical solution, a limiting column is provided, which has a limiting effect, so that the position of the spring is not easily shifted when it is compressed or reset.

[0012] Optionally, the valve cover is provided with a fixing groove threadedly connected to the valve body, and a locking hole connected to the fixing groove is provided on a side of the valve cover, and a top screw is threadedly connected to the locking hole.

[0013] By adopting the above technical solution, after the valve cover is threadedly connected to the valve body, the driving top screw is brought into contact with the surface of the valve body to limit the valve cover, making it difficult for the valve cover and the valve body to rotate, thereby preventing them from loosening. By adjusting the position of the valve cover, the force of the pressure reducing structure on the valve core can be adjusted, that is, the pressure reducing degree of the pressure reducing valve can be adjusted.

[0014] Optionally, a sealing ring is provided on the outer circumferential surface of the piston rod, an elastic compression washer is provided on the outer sleeve of the piston rod, a compression nut is connected to the external thread of the piston rod, and the compression washer is located between the compression nut and the sealing ring.

[0015] By adopting the above technical solution, when the clamping washer is damaged, the clamping nut is separated from the piston rod, which makes it easy to replace the damaged clamping washer. Conversely, it is easy to install and fix the clamping washer on the piston rod.

[0016] Optionally, a first limiting ring block is arranged on the end surface of the compression gasket facing the sealing ring, and a first limiting ring groove for inserting the first limiting ring block is opened on the sealing ring.

[0017] By adopting the above technical solution, the first limiting sliding block and the first limiting ring groove cooperate to limit the clamping washer.

[0018] Optionally, the valve core structure further includes a piston sleeve threadedly connected to the accommodating space, and the piston rod is inserted into the piston sleeve.

[0019] By adopting the above technical solution, the piston rod is limited by the piston sleeve, so that the piston rod is not easy to move in the radial direction.

[0020] Optionally, the piston sleeve has a slot on its end surface facing the connecting sleeve, a socket is formed on the bottom wall of the slot, and the piston rod includes a blocking rod inserted into the slot, and a top rod is provided at one end of the blocking rod and inserted into the socket.

[0021] By adopting the above technical solution, when the blocking rod abuts against the bottom wall of the slot, the piston rod is restricted from moving toward the valve cover, thereby playing a limiting role.

[0022] Optionally, a fixing nut is provided between the valve body and the connecting sleeve to connect the two.

[0023] By adopting the above technical solution, the fixing nut connects the connecting sleeve to the valve body, and when the connecting sleeve is damaged, it is convenient to replace the connecting sleeve.

[0024] In summary, the present application includes at least one of the following beneficial technical effects:

[0025] 1. The through hole can be blocked or opened through the valve core structure; when the fire extinguishing agent enters from the connecting sleeve, the fire extinguishing agent drives the piston rod and the compression sleeve to move, and the compression sleeve drives the spring to compress and deform. The spring applies a force opposite to the feeding direction to the piston rod, thereby offsetting part of the feeding pressure, slowing down the release speed of the fire extinguishing agent, reducing the probability of equipment damage, reducing the probability of injury to workers, and improving safety performance;

[0026] 2. The position of the valve cover can be adjusted by rotating the valve cover, and the valve cover and the valve body can be fixed with the help of the top screw to adjust the force of the pressure reducing structure on the piston rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 This is a schematic diagram of the structure of the valve core structure in the embodiment of the present application when the through hole is blocked;

[0029] Figure 2 yes Figure 1 A magnified schematic diagram of part A;

[0030] Figure 3 It is a structural schematic diagram when the valve core structure blocks the feed hole.

[0031] Figure numerals: 1, valve body; 11, accommodating space; 111, accommodating cavity; 112, accommodating groove; 113, accommodating hole; 12, feed groove; 13, feed hole; 14, discharge hole; 2, valve cover; 21, fixing groove; 22, locking hole; 23, top screw; 3, valve core structure; 31, piston rod; 311, top rod; 3111, first sealing ring block; 312, blocking rod; 3121, second sealing ring block; 313, blocking ring; 3131, first limiting ring groove; 31 4. Compression washer; 3141. First limiting ring block; 3142. Second limiting ring block; 315. Compression nut; 3151. Second limiting ring groove; 32. Piston sleeve; 321. Positioning column; 3211. Slot; 3212. Socket; 322. Positioning ring; 323. Sealing ring; 4. Decompression structure; 41. Spring; 42. Compression sleeve; 43. Limiting column; 5. Connecting sleeve; 51. Feed groove; 52. Discharge groove; 53. Through hole; 6. Fixing nut. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-3 This application is described in further detail.

[0033] This embodiment discloses a pressure reducing valve. Figure 1 A pressure reducing valve comprises a valve body 1, a valve cover 2, a valve core structure 3 and a pressure reducing structure 4.

[0034] Reference Figure 1 A receiving space 11 is provided on one side of the valve body 1. The receiving space 11 includes a receiving cavity 111, a receiving groove 112 and a receiving hole 113.

[0035] Reference Figure 1 The accommodating chamber 111 is provided inside the valve body 1 . The accommodating groove 112 is provided at one end of the valve body 1 . The accommodating hole 113 is provided on the bottom wall of the accommodating groove 112 , and the accommodating hole 113 is communicated with the accommodating chamber 111 .

[0036] Reference Figure 1 The end surface of the valve body 1 away from the first accommodating groove 112 is provided with a feed groove 12, and the bottom wall of the feed groove 12 is provided with a feed hole 13, which is connected to the accommodating cavity 111. The side of the valve body 1 is provided with a discharge hole 14, which is connected to the accommodating cavity 111.

[0037] Reference Figure 1 The valve cover 2 is threadedly connected to the end of the valve body 1 away from the feed hole 13, and the valve cover 2 blocks the opening of the accommodating groove 112. The valve cover 2 is provided with a fixing groove 21, and a part of the valve body 1 can be inserted into the fixing groove 21. A locking hole 22 is provided on the outer circumferential surface of the valve body 1, and the locking hole 22 is connected to the fixing groove 21. A top screw 23 is connected to the inner thread of the locking hole 22.

[0038] Reference Figure 1 A connecting sleeve 5 is provided in the feed groove 12. A fixing nut 6 is threadedly connected to the valve body 1, and the connecting sleeve 5 is connected to the valve body 1 by means of the fixing nut 6.

[0039] Reference Figure 1 The end surface of the connecting sleeve 5 away from the valve body 1 is provided with a feed groove 51, the end surface of the connecting sleeve 5 facing the valve cover 2 is provided with a discharge groove 52, the bottom wall of the feed groove 51 is provided with a through hole 53, and the through hole 53 is connected with the discharge groove 52. When the connecting sleeve 5 and the fixing nut 6 are connected to the valve body 1, the discharge groove 52 is located in the feed groove 12.

[0040] Reference Figure 1 The valve core structure 3 is disposed in the accommodating space 11. The valve core structure 3 includes a piston rod 31 and a piston sleeve 32.

[0041] Reference Figure 1 The piston sleeve 32 includes a positioning column 321 and a positioning ring 322. The positioning column 321 is threadedly connected to the receiving hole 113, and a portion of the positioning column 321 is located in the receiving groove 112. The positioning ring 322 is fixedly connected to the outer circumferential surface of the positioning column 321 and is located in the receiving groove 112. When the positioning ring 322 abuts against the bottom wall of the receiving groove 112, the positioning column 321 is restricted from continuing to move toward the discharge hole 14.

[0042] Reference Figure 1 The piston sleeve 32 is provided with a sealing ring 323 on its outer surface. When the piston sleeve 32 is connected to the valve body 1, the outer surface of the sealing ring 323 abuts against the inner wall of the accommodating hole 113. The end surface of the positioning column 321 facing the accommodating cavity 111 is provided with a slot 3211, and the bottom wall of the slot 3211 is provided with a plug hole 3212. The cross section of the slot 3211 is larger than the cross section of the plug hole 3212.

[0043] Reference Figure 1 The piston rod 31 is used to block the through hole 53 and the feed hole 13. The piston rod 31 includes a push rod 311 and a blocking rod 312.

[0044] Reference Figure 1 The push rod 311 is inserted into the insertion hole 3212, and one end of the push rod 311 extends out of the insertion hole 3212. A first sealing ring groove is provided on the outer circumferential surface of the push rod 311, and a first sealing ring block 3111 is provided in the first sealing ring groove. The first sealing ring block 3111 abuts against the inner wall of the insertion hole 3212.

[0045] Reference Figure 1The blocking rod 312 is inserted into the slot 3211, one end of the blocking rod 312 is fixedly connected to the push rod 311, and the end of the blocking rod 312 away from the push rod 311 extends out of the slot 3211. The blocking rod 312 passes through the accommodating cavity 111 and the feed hole 13 and extends into the feed trough 12. A second sealing ring groove is provided on the outer circumferential surface of the blocking rod 312, and a second sealing ring block 3121 is provided in the second sealing ring groove. The second sealing ring block 3121 abuts against the inner circumferential surface of the slot 3211.

[0046] Reference Figure 1 and Figure 2 A sealing ring 313 is fixedly connected to the outer circumferential surface of the sealing rod 312, and a first limiting ring groove 3131 is provided at the end of the sealing ring 313 away from the top rod 311. A compression washer 314 is sleeved on the outer circumferential surface of the sealing rod 312, and the compression washer 314 is located at the end of the sealing ring 313 away from the compression sleeve 42. The compression washer 314 is made of elastic material. A first limiting ring block 3141 is fixedly connected to the end surface of the compression washer 314 facing the sealing ring 313, and the first limiting ring block 3141 can be inserted into the first limiting ring groove 3131. A second limiting ring block 3142 is fixedly connected to the end surface of the compression washer 314 away from the first limiting ring block 3141,

[0047] Reference Figure 1 and Figure 2 The plugging rod 312 is externally threaded with a clamping nut 315, which is located at one end of the clamping washer 314 away from the plugging ring 313. The clamping nut 315 is provided with a second limiting ring groove 3151 at one end facing the plugging ring 313, into which the second limiting ring block 3142 can be inserted.

[0048] Reference Figure 2 and Figure 3 When the piston rod 31 is not subjected to the pressure of the fire extinguishing agent, the clamping nut 315 and the clamping washer 314 are inserted into the through hole 53, and the clamping nut 315 abuts against the inner wall of the through hole 53 to achieve the blocking of the through hole 53. When the piston rod 31 is subjected to a large force of the fire extinguishing agent, and the blocking rod 312 abuts against the bottom wall of the slot 3211, the blocking ring 313 and the clamping washer 314 are both in the feed hole 13, and the clamping washer 314 abuts against the inner wall of the feed hole 13, preventing the fire extinguishing agent from continuing to pass through the pressure reducing valve, thereby improving safety.

[0049] Reference Figure 1 and Figure 3 When the piston rod 31 switches from blocking the through hole 53 to blocking the feed hole 13, the first sealing ring block 3111 is always located in the insertion hole 3212, and the first sealing ring block 3111 is always in contact with the inner wall of the insertion hole 3212, and the second sealing ring block 3121 is always located in the insertion slot 3211, and the second sealing ring block 3121 is always in contact with the inner wall of the insertion slot 3211.

[0050] Reference Figure 1 The decompression structure 4 is arranged in the receiving groove 112, and the decompression structure 4 includes a spring 41 and a compression sleeve 42. One end of the compression sleeve 42 abuts against the end surface of the push rod 311 away from the blocking rod 312, and the end surface of the compression sleeve 42 away from the piston sleeve 32 is fixedly connected to the limiting column 43.

[0051] Reference Figure 1 The spring 41 is sleeved outside the limiting column 43, and the spring 41 is in a compressed state. One end of the spring 41 abuts against the bottom wall of the fixing groove 21, and the other end of the spring 41 abuts against the compression sleeve 42.

[0052] The implementation principle of a pressure reducing valve in an embodiment of the present application is as follows: when the fire extinguishing agent needs to pass through the pressure reducing valve, the fire extinguishing agent drives the piston rod 31 and the compression sleeve 42 to move, and the compression sleeve 42 drives the spring 41 to deform. The deformation of the spring 41 applies a reaction force to the piston rod 31, that is, the reaction force of the spring 41 on the piston rod 31 is transferred to the fire extinguishing agent flowing through the inside of the valve body 1, thereby slowing down the speed of the fire extinguishing agent passing through the valve body 1 and reducing the discharge pressure of the fire extinguishing agent after passing through the valve body 1.

[0053] Unless otherwise defined, the technical terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. The words "first", "second", "third" and similar words used in the specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "One" or "one" and similar words do not indicate a quantitative limit, but indicate that there is at least one. "Include" or "comprise" and similar words mean that the elements or objects appearing before "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0054] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the design concept of the present application should be included in the protection scope of the present application.

Claims

1. A pressure reducing valve, comprising a valve body (1), characterized in that: A containing space (11) is provided on one side of the valve body (1), a feed hole (13) is provided on the side of the valve body (1) away from the containing space (11), a discharge hole (14) communicating with the containing space (11) is provided on the side of the valve body (1), a valve cover (2) is provided on the side of the valve body (1) away from the feed hole (13), a connecting sleeve (5) is provided on the side of the valve body (1) away from the valve cover (2), a through hole (53) aligned with the feed hole (13) is provided on the connecting sleeve (5), the containing space (11) A valve core structure (3) for blocking the through hole (53) and a pressure reducing structure (4) for adjusting the pressure are arranged inside; the valve core structure (3) includes a piston rod (31) arranged in the accommodating space (11); the pressure reducing structure (4) includes a spring (41) and a compression sleeve (42) arranged in the accommodating space (11); the compression sleeve (42) is arranged on the side of the piston rod (31) away from the valve cover (2); one end of the spring (41) abuts against the compression sleeve (42), and the other end of the spring (41) abuts against the valve cover (2).

2. A pressure reducing valve according to claim 1, characterized in that: The compression sleeve (42) is provided with a limiting column (43) on the end surface facing the spring (41), and the spring (41) is sleeved outside the limiting column (43).

3. A pressure reducing valve according to claim 1, characterized in that: The valve cover (2) is provided with a fixing groove (21) threadedly connected to the valve body (1), and a locking hole (22) communicating with the fixing groove (21) is provided on a side surface of the valve cover (2), and a top screw (23) is connected to the inner thread of the locking hole (22).

4. A pressure reducing valve according to claim 1, characterized in that: The outer circumferential surface of the piston rod (31) is provided with a sealing ring (313), the outer sleeve of the piston rod (31) is provided with an elastic compression washer (314), the piston rod (31) is externally threadedly connected with a compression nut (315), and the compression washer (314) is located between the compression nut (315) and the sealing ring (313).

5. A pressure reducing valve according to claim 4, characterized in that: The end surface of the compression washer (314) facing the sealing ring (313) is provided with a first limiting ring block (3141), and the sealing ring (313) is provided with a first limiting ring groove (3131) for the first limiting ring block (3141) to be inserted.

6. A pressure reducing valve according to claim 1, characterized in that: The valve core structure (3) also includes a piston sleeve (32) threadedly connected to the accommodating space (11), and the piston rod (31) is inserted into the piston sleeve (32).

7. A pressure reducing valve according to claim 6, characterized in that: The piston sleeve (32) is provided with a slot (3211) on the end surface facing the connecting sleeve (5), and the bottom wall of the slot (3211) is provided with a plug hole (3212). The piston rod (31) includes a blocking rod (312) inserted into the slot (3211), and one end of the blocking rod (312) is provided with a push rod (311) inserted into the plug hole (3212).

8. A pressure reducing valve according to claim 1, characterized in that: A fixing nut (6) is provided between the valve body (1) and the connecting sleeve (5) to connect the two.

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