Blow-off valve structure

Abstract

The utility model provides a blow-off valve structure, belongs to the field of safety valves, aims to solve the problems that blow-off of a blow-off valve is not timely, blow-off sound is too loud, reset is slow, and gas waste is easily caused, and comprises a valve body shell. The interior of the valve body shell is hollow and transversely provided with a through pipe, the middle of the top of the valve body shell is rotationally connected with a rotary valve, the interior of the rotary valve is in threaded connection with a check rod, the interior of the check rod is slidably connected with a pressure dispersing valve rod, and the bottom of the pressure dispersing valve rod is slidably connected to the middle of the through pipe. A stamping valve block is slidably connected to the bottom of an inner cavity of the valve body shell, and a supporting spring is connected to the bottom of the stamping valve block. According to the relief valve structure, the telescopic end of the bottom of the miniature electric control telescopic rod is connected with the control piece, the miniature electric control telescopic rod can control the pressure relief valve rod to ascend and descend, the relief hole in the top of the pressure relief valve rod extends out of the top of the check rod so that pressure relief operation can be carried out, and meanwhile a pressure relief through groove in the check rod can be communicated with the pressure relief hole; therefore, the pressure is quickly dispersed.

Description

Technical Field

[0001] The utility model relates to the technical field of safety valves, in particular to a relief valve structure. Background Art

[0002] The relief valve is a safety warning device for pipeline transportation of flammable and explosive gases. When the pressure at the control point exceeds the set value (bubble burst pressure) due to some temporary reasons, the valve will discharge a certain amount of gas. The existing relief valve structure is not fast and timely when releasing the pressure, which can easily cause damage to the valve body and pipeline, and will have a certain impact on safe use. In addition, a loud noise will be generated when releasing the pressure in the middle of the night, which can easily affect people who are resting. The relief valve resetting process is also relatively slow, which can easily cause gas waste. Utility Model Content

[0003] The purpose of the utility model is to provide a relief valve structure to solve the problem that the existing relief valve structure proposed in the above background technology is not fast and timely enough when releasing the pressure, which easily causes damage to the valve body and the pipeline, and produces a loud noise when releasing the pressure in the middle of the night, which easily affects people who are resting, and the relief valve reset process is also relatively slow, which easily causes gas waste.

[0004] The purpose and effect of the relief valve structure of the utility model are achieved by the following specific technical means:

[0005] A relief valve structure, wherein the relief valve structure includes a valve body shell; the valve body shell is gong-shaped, the interior of the valve body shell is hollow and has a through-tube running through it transversely, a rotary valve is rotatably connected to the middle of the top of the valve body shell, a check rod is threadedly connected to the inside of the rotary valve, a pressure relief valve stem is slidably connected to the inside of the check rod, the bottom of the pressure relief valve stem is slidably connected to the middle of the through-tube, a stamping valve block is slidably connected to the bottom of the inner cavity of the valve body shell, and a supporting spring is connected to the bottom of the stamping valve block.

[0006] Furthermore, the through-tube is hollow, the top of the through-tube is fixedly connected with a longitudinal vertical pipe, the outer wall of the vertical pipe is provided with four strip-shaped limiting slide grooves in a circular array, and a rotating opening is provided in the middle of the top of the valve body shell.

[0007] Furthermore, the top of the outer wall of the rotary valve is plum blossom-shaped, and two outer slip rings are equidistantly arranged at the bottom of the outer wall of the rotary valve. The outer slip rings are slidably connected to the inner wall of the rotating port of the valve body shell, and a penetrating internal thread groove is opened in the middle of the longitudinal direction of the rotary valve.

[0008] Furthermore, a through pressure relief groove is provided in the check rod, three through holes are provided at equal distances on the front side of the bottom of the check rod, the through holes are connected to the pressure relief groove, an external thread is provided on the outer wall of the middle and upper end of the check rod, the external thread is threadedly connected to the internal thread groove in the rotary valve, four limit sliders are provided in a circular array at the bottom of the outer wall of the check rod, the limit slider is slidably connected to the limit slide groove provided on the vertical pipe at the top of the through pipe, a pressure relief hole is provided in the check rod body at the corresponding top of the limit slide groove, and the pressure relief hole and the pressure relief groove are connected.

[0009] Furthermore, the interior of the pressure relief valve stem is hollow, and an annular control plate is provided at the bottom of the outer wall of the pressure relief valve stem. The control plate is slidably connected in the side wall of the pressure relief groove of the check rod. The top of the control plate is connected to the telescopic ends of three micro-electrically controlled telescopic rods connected in a circular array. The micro-electrically controlled telescopic rods are installed inside the check rod. Eight relief holes are opened in a circular array at the top of the outer wall of the pressure relief valve stem, and a manual pull ring is provided on the top of the pressure relief valve stem.

[0010] Furthermore, the top end surface of the stamping valve block is concave, and the bottom of the outer side wall of the stamping valve block is provided with eight pressure-relieving holes in a circular array.

[0011] The utility model provides a relief valve structure, which has the following beneficial effects:

[0012] 1. A through-tube that penetrates transversely is provided in the valve body shell to allow gas or liquid to pass through, and a vertical pipe is provided on the top of the through-tube. A limit slide groove is provided in the side wall of the vertical pipe to limit the up and down sliding of the check rod to prevent the check rod from rotating. The interior of the valve body shell is hollow, and the stamping valve block that is slidably connected to the bottom of the valve body shell pushes the stamping valve block to compress the support spring when the pressure inside the valve body shell is too high, so that the pressure relief hole of the stamping valve block is located on the outside of the valve body shell, so as to perform pressure relief operation on the inside of the valve body shell, thereby avoiding damage to the valve body shell. The stamping valve block can automatically reset under the action of the support spring, so it can recover by itself after the pressure relief is completed.

[0013] 2. By rotating the rotary valve, the check rod can be controlled to rise and fall through the cooperation of the internal thread groove and the external thread to control the opening and closing of the valve, and a through pressure relief groove is provided inside the check rod. When the convection direction of the through pipe is subjected to strong pressure, the pressure relief operation can be carried out through the through hole connected to the pressure relief groove and in cooperation with the pressure relief valve stem. Moreover, through the cooperation of the control plate and the pressure relief hole, the pressure relief operation can be carried out quickly at high pressure. The problem of loud noise generated during pressure relief can be solved through multiple pressure relief holes.

[0014] 3. By connecting the telescopic end at the bottom of the micro-electric telescopic rod with the control plate, the pressure relief valve stem can be controlled to rise and fall through the micro-electric telescopic rod, and the relief hole at the top of the pressure relief valve stem will protrude from the top of the check rod to facilitate pressure relief operation. At the same time, the pressure relief groove and the pressure relief hole inside the check rod can be connected, so as to quickly relieve pressure. The design of multiple relief holes is also to reduce noise generation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the utility model from the left front side axis view;

[0016] Figure 2 This is a schematic diagram of the overall split structure of the utility model;

[0017] Figure 3 It is a schematic diagram of the overall cutaway structure of the utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the valve body shell of the utility model from top view;

[0019] Figure 5 This is a schematic diagram of the external structure of the rotary valve and the cutaway structure of the stamping valve block of the utility model;

[0020] Figure 6 It is a schematic diagram of the cutaway structure of the rotary valve, the check rod and the pressure relief valve stem of the utility model.

[0021] In the figure, the corresponding relationship between the component names and the figure numbers is as follows:

[0022] 1. Valve body shell; 101. Through pipe; 102. Vertical pipe; 103. Limit slide groove; 104. Rotation mouth; 2. Rotary valve; 201. External sliding ring; 202. Internal thread groove; 3. Check rod; 301. External thread; 302. Limit slide block; 303. Pressure relief groove; 304. Pressure relief hole; 305. Through hole; 4. Micro-electric telescopic rod; 5. Pressure relief valve stem; 501. Control plate; 502. Release hole; 503. Manual pull ring; 6. Stamping valve block; 601. Pressure relief hole; 7. Support spring. DETAILED DESCRIPTION

[0023] The implementation of the utility model is further described in detail below in conjunction with the drawings and examples.

[0024] Embodiment 1:

[0025] As attached Figure 1 To Attachment Figure 6 As shown:

[0026] The utility model provides a relief valve structure, comprising: a valve body shell 1; the valve body shell 1 is in a gong shape, the interior of the valve body shell 1 is hollow and a through-tube 101 is horizontally provided therethrough, a rotary valve 2 is rotatably connected to the middle of the top of the valve body shell 1, a check rod 3 is threadedly connected to the inside of the rotary valve 2, a pressure relief valve stem 5 is slidably connected to the inside of the check rod 3, the bottom of the pressure relief valve stem 5 is slidably connected to the middle of the through-tube 101, a stamping valve block 6 is slidably connected to the bottom of the inner cavity of the valve body shell 1, a supporting spring 7 is connected to the bottom of the stamping valve block 6, the top end surface of the stamping valve block 6 is concave, and eight pressure relief holes 601 are formed in an annular array at the bottom of the outer side wall of the stamping valve block 6, the through-tube 101 is hollow, a longitudinal vertical pipe 102 is fixedly connected to the top of the through-tube 101, and four strip-shaped limiting sliding grooves 100 are formed in an annular array in the outer side wall of the vertical pipe 102 3. A rotating opening 104 is provided in the middle of the top of the valve body shell 1. The specific function is to provide a through-tube 101 that penetrates horizontally in the valve body shell 1 so that gas or liquid can pass through. A vertical tube 102 is provided at the top of the through-tube 101. A limiting slide groove 103 is provided in the side wall of the vertical tube 102 so as to limit the up and down sliding of the check rod 3 and prevent the check rod 3 from rotating. The interior of the valve body shell 1 is hollow. The stamping valve block 6 that is slidably connected to the bottom of the valve body shell 1 pushes the stamping valve block 6 to compress the supporting spring 7 when the pressure inside the valve body shell 1 is too high, so that the pressure relief hole 601 of the stamping valve block 6 is located outside the valve body shell 1, so as to perform a pressure relief operation on the inside of the valve body shell 1, thereby avoiding damage to the valve body shell 1. The stamping valve block 6 can automatically reset under the action of the supporting spring 7, so that it can recover by itself after the pressure relief is completed.

[0027] Among them, the top of the outer wall of the rotary valve 2 is plum blossom-shaped, and two outer slip rings 201 are equidistantly arranged at the bottom of the outer wall of the rotary valve 2. The outer slip rings 201 are slidably connected to the inner wall of the rotating port 104 of the valve body shell 1. A through internal thread groove 202 is provided in the longitudinal middle of the rotary valve 2, and a through pressure relief groove 303 is provided in the check rod 3. Three through holes 305 are equidistantly arranged on the front side of the bottom of the check rod 3, and the through holes 305 are connected to the pressure relief groove 303. An external thread 301 is provided on the outer wall of the middle and upper end of the check rod 3, and the external thread 301 is threadedly connected to the internal thread groove 202 in the rotary valve 2. The bottom of the outer wall of the check rod 3 is provided with four limit sliders 302 in a ring array, and the limit slider 302 is slidably connected to the through pipe In the limiting slide groove 103 formed in the vertical pipe 102 at the top of 101, a pressure relief hole 304 is formed in the rod body of the check rod 3 at the corresponding position of the top of the limiting slide groove 103, and the pressure relief hole 304 is connected with the pressure relief groove 303. Specifically, by rotating the rotary valve 2, the check rod 3 can be controlled to rise and fall through the cooperation of the internal thread groove 202 and the external thread 301, so as to control the opening and closing of the valve, and a through pressure relief groove 303 is formed inside the check rod 3. When the convection direction of the through pipe 101 is subjected to strong pressure, the pressure relief operation can be performed by cooperating with the pressure relief valve stem 5 through the through hole 305 connected with the pressure relief groove 303, and the pressure relief operation can be performed quickly under high pressure through the cooperation of the control plate 501 and the pressure relief hole 304.

[0028] Among them, the interior of the pressure relief valve stem 5 is hollow, and an annular control plate 501 is provided at the bottom of the outer side wall of the pressure relief valve stem 5. The control plate 501 is slidably connected to the side wall of the pressure relief groove 303 of the check rod 3. The top of the control plate 501 is connected to the telescopic ends of three micro-electrically controlled telescopic rods 4 connected in a circular array. The micro-electrically controlled telescopic rods 4 are installed inside the check rod 3. Eight release holes 502 are opened in a circular array on the top of the outer side wall of the pressure relief valve stem 5. A manual pull ring 503 is provided on the top of the pressure relief valve stem 5. The specific function is that by connecting the telescopic end at the bottom of the micro-electrically controlled telescopic rod 4 with the control plate 501, the pressure relief valve stem 5 can be controlled to rise and fall through the micro-electrically controlled telescopic rod 4, and the release hole 502 at the top of the pressure relief valve stem 5 protrudes from the top of the check rod 3 to perform pressure relief operation. At the same time, the pressure relief groove 303 and the pressure relief hole 304 inside the check rod 3 can be connected, thereby quickly relieving pressure.

[0029] The specific usage and function of this embodiment are as follows:

[0030] When using the relief valve structure, first install the through pipe 101 of the valve body shell 1 to the pipeline, and then by rotating the rotary valve 2, the check rod 3 can be controlled to rise and fall through the cooperation of the internal thread groove 202 and the external thread 301 to control the opening and closing of the valve. When the check rod 3 is blocked in the through pipe 101, the valve can be closed. When the through pipe 101 is subjected to a strong pressure in the convection direction, the pressure relief operation can be performed through the through hole 305 connected to the pressure relief groove 303 and the pressure relief valve stem 5. When the pressure is extremely high, the micro-electric telescopic rod 4 can be connected to the control plate 501 through the micro-electric telescopic rod 4. The retracting rod 4 controls the pressure relief valve stem 5 to rise and fall, and the relief hole 502 on the top of the pressure relief valve stem 5 protrudes from the top of the check rod 3 to perform the pressure relief operation, and at the same time, the pressure relief groove 303 and the pressure relief hole 304 inside the check rod 3 can be connected, so as to quickly relieve the pressure. When the pressure inside the valve body shell 1 is too high, the stamping valve block 6 is pushed to compress the supporting spring 7, so that the pressure relief hole 601 of the stamping valve block 6 is located on the outside of the valve body shell 1, so as to perform the pressure relief operation on the inside of the valve body shell 1, thereby avoiding damage to the valve body shell 1, and the stamping valve block 6 can automatically reset under the action of the supporting spring 7, so it can recover by itself after the pressure relief is completed.

[0031] Embodiment 2:

[0032] By changing the shape of the outer portion of the rotary valve 2 , the rotary valve 2 can be controlled by electric drive, so as to reduce manual operation and ensure the safety of personnel during dangerous operations.

Claims

1. A relief valve structure, characterized in that: The invention comprises a valve body shell (1); the valve body shell (1) is gong-shaped, the interior of the valve body shell (1) is hollow and a through-tube (101) is provided therethrough in the transverse direction, a rotary valve (2) is rotatably connected to the middle of the top of the valve body shell (1), a check rod (3) is threadedly connected to the inside of the rotary valve (2), a pressure relief valve stem (5) is slidably connected to the inside of the check rod (3), the bottom of the pressure relief valve stem (5) is slidably connected to the middle of the through-tube (101), a stamping valve block (6) is slidably connected to the bottom of the inner cavity of the valve body shell (1), and a supporting spring (7) is connected to the bottom of the stamping valve block (6).

2. A relief valve structure according to claim 1, characterized in that: The through-tube (101) is hollow, and a longitudinal vertical tube (102) is fixedly connected to the top of the through-tube (101). Four strip-shaped limiting sliding grooves (103) are arranged in a circular array in the outer wall of the vertical tube (102), and a rotating opening (104) is arranged in the middle of the top of the valve body shell (1).

3. A relief valve structure according to claim 1, characterized in that: The top of the outer wall of the rotary valve (2) is in the shape of a plum blossom. Two outer sliding rings (201) are equidistantly arranged at the bottom of the outer wall of the rotary valve (2). The outer sliding rings (201) are slidably connected to the inner wall of the rotary opening (104) of the valve body shell (1). A through internal thread groove (202) is provided in the middle of the longitudinal direction of the rotary valve (2).

4. A relief valve structure according to claim 1, characterized in that: The check rod (3) is provided with a through pressure relief groove (303), three through holes (305) are provided at equal distances on the front side of the bottom of the check rod (3), the through holes (305) and the pressure relief groove (303) are communicated with each other, an external thread (301) is provided on the outer wall of the middle upper end of the check rod (3), the external thread (301) is threadedly connected to the internal thread groove (202) in the rotary valve (2), four limiting sliders (302) are provided in a circular array at the bottom of the outer wall of the check rod (3), the limiting sliders (302) are slidably connected to the limiting sliding groove (103) provided on the vertical pipe (102) at the top of the through pipe (101), a pressure relief hole (304) is provided in the rod body of the check rod (3) at the corresponding position of the top of the limiting sliding groove (103), the pressure relief hole (304) and the pressure relief groove (303) are communicated with each other.

5. A relief valve structure according to claim 1, characterized in that: The interior of the pressure relief valve stem (5) is hollow. The bottom of the outer wall of the pressure relief valve stem (5) is provided with an annular control plate (501). The control plate (501) is slidably connected to the side wall of the pressure relief groove (303) of the check rod (3). The top of the control plate (501) is connected to the telescopic ends of three micro-electrically controlled telescopic rods (4) connected in an annular array. The micro-electrically controlled telescopic rods (4) are installed inside the check rod (3). The top of the outer wall of the pressure relief valve stem (5) is provided with eight relief holes (502) in an annular array. The top of the pressure relief valve stem (5) is provided with a manual pull ring (503).

6. A relief valve structure according to claim 1, characterized in that: The top end surface of the stamping valve block (6) is concave, and the bottom of the outer side wall of the stamping valve block (6) is provided with eight pressure-relieving holes (601) in a circular array.

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