Safety valve mounted on molecular sieve oxygen production equipment

Abstract

The utility model belongs to the technical field of molecular sieve oxygen production, and particularly relates to a safety valve mounted on molecular sieve oxygen production equipment, which comprises a valve body, one side of the inner wall of the valve body facing the central axis is obliquely arranged, the inner wall of the valve body is provided with a sealing block, and the side wall of the sealing block is fixedly connected with a cross rod. A blocking plate is fixedly connected to the position, on the right side of the sealing block, of the inner wall of the valve body, a plurality of through holes are formed in the side wall of the blocking plate, the other end of the transverse rod penetrates through the blocking plate and is movably connected with the blocking plate, and the position, between the sealing block and the blocking plate, of the side wall of the transverse rod is sleeved with a first spring. An overpressure protection assembly is arranged on the side wall of the valve body. According to the utility model, redundant high-pressure gas in the pipeline can be discharged while the gas flow is controlled, so that a good and stable conveying pipeline is created for oxygen production equipment.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of molecular sieve oxygen production, and particularly relates to a safety valve installed on a molecular sieve oxygen production device. BACKGROUND

[0002] Molecular sieve oxygen production is a highly efficient oxygen production method and is widely used in medical treatment, industry, aerospace and other fields. The molecular sieve oxygen production technology is based on the principle of pressure swing adsorption and uses the selective adsorption characteristics of molecular sieves for different gas molecules to extract oxygen. During the PSA process, compressed air passes through an adsorption tower containing molecular sieves, nitrogen is adsorbed by the molecular sieves, and oxygen passes through the adsorption tower and is collected. By periodically switching the pressure and adsorption state of the adsorption tower, continuous oxygen production is achieved.

[0003] Gas control valves are key components for ensuring efficient and safe operation of the oxygen production process. These valves are mainly used to control the flow direction, pressure and flow rate of the gas to achieve the adsorption and regeneration processes of the molecular sieves. In existing gas control valves, most of them control the flow rate of the gas manually. If the gas pressure in the pipeline is too high, the flow rate of the control valve is limited, and the excess pressure gas cannot be discharged in time, which poses a safety risk. On the one hand, it affects the subsequent flow control of the gas, and on the other hand, the presence of pressure gas exceeding the set value in the pipeline can easily cause gas leakage and damage to the pipeline. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims to provide a safety valve installed on a molecular sieve oxygen production device, which can control the flow rate of the gas while discharging excess high-pressure gas in the pipeline, creating a good and stable delivery pipeline for the oxygen production device.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A safety valve installed on a molecular sieve oxygen production device, comprising a valve body, wherein the inner wall of the valve body is inclined towards the central axis, the inner wall of the valve body is provided with a sealing block, the side wall of the sealing block is fixedly connected with a horizontal rod, the right side of the inner wall of the valve body is fixedly connected with a blocking plate, a plurality of through holes are formed in the side wall of the blocking plate, the other end of the horizontal rod penetrates through the blocking plate and is movably connected therewith, a first spring is sleeved between the side wall of the horizontal rod and the sealing block and the blocking plate, a control assembly is arranged in the right side of the inner cavity of the valve body, and an overpressure protection assembly is arranged on the side wall of the valve body.

[0007] The control assembly includes a support plate fixedly connected to the inner wall of the valve body, a screw sleeve rotationally connected to the side wall of the support plate, a screw rod threadedly connected to the inner side of the screw sleeve, a cylindrical structure with an opening at one end of the screw rod, a horizontal rod with the other end in the inner cavity of the screw rod, two clamping blocks fixedly connected to the side wall of the horizontal rod near the end face, two clamping grooves formed in the inner wall of the screw rod, the clamping blocks in sliding connection with the clamping grooves, a driving assembly provided on the side wall of the screw sleeve, and a plugging assembly provided on the side wall of the screw rod.

[0008] The driving assembly includes a worm gear fixedly connected to the side wall of the screw sleeve, a worm shaft engaged with the rear side of the worm gear, and a rotating wheel penetrating through the valve body and fixedly connected to the top end of the worm shaft, the worm shaft being rotationally connected to the valve body.

[0009] The plugging assembly includes a connecting plate fixedly connected to the side wall of the screw rod near the left end, a plurality of top blocks fixedly connected to the side wall of the connecting plate and adapted to the through holes, the number of the top blocks being consistent with that of the through holes, and the through holes and the side walls of the top blocks being obliquely arranged.

[0010] The side wall of the connecting plate is fixedly connected with a limiting rod, the other end of the limiting rod penetrating through the plugging plate and movably connected thereto.

[0011] The overpressure protection assembly includes an exhaust pipe fixedly connected to the side wall of the valve body, the exhaust pipe being in communication with the inner cavity of the valve body, a movable block provided on the inner wall of the exhaust pipe, a second spring fixedly connected between the movable block and the inner wall of the exhaust pipe, and a baffle fixedly connected to the top end of the exhaust pipe.

[0012] The utility model achieves the following technical effects:

[0013] The safety valve installed on the molecular sieve oxygen generating equipment of the utility model protects the pressure in the pipeline under the condition that the normal conveying or closed state of the gas is not affected, directly discharges the pipeline when the pressure in the pipeline is too large, avoids that the pipeline is damaged and leaks due to the failure of discharging the large gas pressure in the pipeline, and thus creates a good and stable conveying pipeline for the oxygen generating equipment. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is the perspective view of the utility model embodiment;

[0015] Figure 2 is the sectional view structure schematic view of the utility model embodiment;

[0016] Figure 3 is the local structure schematic view of the utility model embodiment;

[0017] Figure 4 is the enlarged view of A in the utility model embodiment Figure 2 ;

[0018] Figure 5 is the utility model Figure 2 in the B place enlarged view of the utility model;

[0019] In the drawings, the component list represented by each reference numeral is as follows.

[0020] 1, valve body;2, sealing block;3, cross rod;4, plugging plate;5, through hole;6, support plate;7, screw sleeve;8, screw rod;9, clamping block;10, clamping groove;11, worm wheel;12, worm;13, runner;14, connecting plate;15, top block;16, limit rod;17, first spring;18, exhaust pipe;19, movable block;20, second spring;21, baffle. DETAILED DESCRIPTION

[0021] In order to make the purpose and advantages of the utility model more clear and obvious, the utility model is specifically described below in combination with examples. It should be understood that the following text is only used to describe one or several specific embodiments of the utility model, and does not strictly limit the protection scope specifically requested by the utility model.

[0022] As Figures 1-5 shown, a safety valve mounted on a molecular sieve oxygen generating device, including valve body 1, the inner wall of valve body 1 is inclined to the side of the central axis, the inner wall of valve body 1 is provided with sealing block 2, the side wall of sealing block 2 is fixedly connected with cross rod 3, the inner wall of valve body 1 is fixedly connected with plugging plate 4 on the right side of sealing block 2, a plurality of through holes 5 are formed in the side wall of plugging plate 4, the other end of cross rod 3 penetrates plugging plate 4 and is movably connected with it, the side wall of cross rod 3 is sleeved with first spring 17 between sealing block 2 and plugging plate 4, control assembly is arranged in the inner cavity of valve body 1 on the right side of plugging plate 4, overpressure protection assembly is arranged on the side wall of valve body 1.

[0023] As Figure 3 and Figure 4 shown, the control assembly includes support plate 6 fixedly connected to the inner wall of valve body 1, screw sleeve 7 rotatably connected to the side wall of support plate 6, screw rod 8 threadedly connected to the inner side of screw sleeve 7, the one end of screw rod 8 is in the form of a cylindrical structure, the other end of cross rod 3 is even in the inner cavity of screw rod 8, two clamping blocks 9 are fixedly connected to the side wall of cross rod 3 close to the end face, two clamping grooves 10 are formed in the inner wall of screw rod 8, clamping blocks 9 are slidably connected with clamping grooves 10, drive assembly is arranged on the side wall of screw sleeve 7, and plugging assembly is arranged on the side wall of screw rod 8.

[0024] Specifically, in order to ensure the stable movement of the cross rod 3, the number of the clamping blocks 9 and the clamping grooves 10 is at least two, and the clamping blocks 9 and the clamping grooves 10 are rectangular. When it is necessary to connect the pipelines on both sides for gas transmission, the screw rod 8 pushes the clamping blocks 9 to move through the side surface of the clamping groove 10, so as to connect the pipelines. When the pressure in the pipeline needs to be protected, the high-pressure gas pushes the sealing block 2 to move the clamping blocks 9 in the clamping groove 10, and at this time, the blocking plate 4 closes the pipeline on the other side for overpressure protection.

[0025] As shown in Figure 3 and Figure 4 , the driving assembly includes a worm wheel 11 fixedly connected to the side wall of the screw sleeve 7, the rear side of the worm wheel 11 is engaged with a worm 12, the top end of the worm 12 penetrates through the valve body 1 and is fixedly connected with a rotating wheel 13, and the worm 12 is rotatably connected with the valve body 1. The cooperation of the worm wheel 11 and the worm 12 can effectively control the opening of the sealing block 2. Specifically, the worm wheel 11 and the worm 12 have a self-locking function, which can avoid the phenomenon of shaking and accurately control the flow.

[0026] As shown in Figure 3 , the blocking assembly includes a connecting plate 14 fixedly connected to the side wall of the screw rod 8 near the left end, the side wall of the connecting plate 14 is fixedly connected with a plurality of top blocks 15 matched with the through holes 5, the number of the top blocks 15 is consistent with the number of the through holes 5, and the side walls of the through holes 5 and the top blocks 15 are both inclined. The connecting plate 14 moves synchronously with the screw rod 8, so as to control the connection and closing of the pipelines on both sides of the valve body 1.

[0027] As shown in Figure 3 , the side wall of the connecting plate 14 is fixedly connected with a limiting rod 16, and the other end of the limiting rod 16 penetrates through the blocking plate 4 and is movably connected with the blocking plate 4. The limiting rod 16 can limit the connecting plate 14 and the screw rod 8 to move in the specified position, ensure the cooperation between the top blocks 15 and the through holes 5, and achieve the purpose of efficient sealing.

[0028] As shown in Figure 2 and Figure 5 , the overpressure protection assembly includes an exhaust pipe 18 fixedly connected to the side wall of the valve body 1, the exhaust pipe 18 is in communication with the inner cavity of the valve body 1, the inner wall of the exhaust pipe 18 is provided with a movable block 19, the second spring 20 is fixedly connected between the movable block 19 and the inner wall of the exhaust pipe 18, and the top end of the exhaust pipe 18 is fixedly connected with a baffle 21.

[0029] The inner wall of the exhaust pipe 18 is in the shape of a ladder, and the movable block 19 abuts against the inner wall of the exhaust pipe 18. When the pressure in the valve body 1 is greater than the pressure of the second spring 20, the movable block 19 can be pushed open, so as to facilitate the gas to be discharged, and achieve the purpose of overpressure protection.

[0030] The utility model discloses a working principle is as follows: when the normal delivery of gas needs to be controlled, rotates the runner 13 and drives the worm 12 rotation, the worm 12 drives the worm wheel 11 rotation, and the worm wheel 11 passes through the screw sleeve 7 and drives the screw rod 8 translation, and the screw rod 8 passes through the card slot 10 and drives the card block 9 to remove, and the card block 9 removes the cross bar 3, and makes the sealing block 2 with valve body 1 produce gap, and simultaneously, the first spring 17 compression, and the gas enters through the gap between valve body 1 and sealing block 2, and simultaneously, the screw rod 8 removes the connecting plate 14, and the connecting plate 14 drives the top block 15 and separates the through -hole 5, and the gas can pass through the through -hole 5 and circulate;

[0031] When sealing block 2 and valve body 1 are in the closed state, if the pipeline pressure is too large, the gas pressure removes sealing block 2, and makes the card block 9 move in the card slot 10, and simultaneously, the first spring 17 compression, and the high pressure gas enters the left side of the plugging plate 4 through the gap between valve body 1 and sealing block 2, and the gas pressure enters the exhaust pipe 18 and lifts the movable block 19, and the high pressure gas is discharged through the exhaust pipe 18, avoids the pipeline pressure too large, causes the pipeline damage leakage, to create good stable delivery pipeline for the oxygen production equipment.

[0032] The above only is the preferred implementation of the utility model of mode, should point out, for the ordinary skill in the art of the prior art, under the premise of not departing from the principle of the utility model, can also make a number of improvements and refinements, these improvements and refinements also should be regarded as the protection range of the utility model. The structure, device and operating method not specifically described and explained in the utility model, are implemented according to the conventional means of the field, are not specifically described and explained in the utility model, are implemented according to the conventional means of the field, are not specifically described and explained in the utility model, are implemented according to the conventional means of the field.

Claims

1. A safety valve installed in a molecular sieve oxygen generating apparatus, characterized by: The utility model provides a valve body (1), the inner wall of valve body (1) is obliquely arranged towards the side of middle axis, the inner wall of valve body (1) is provided with sealing block (2), the lateral wall of sealing block (2) is fixedly connected with cross bar (3), the inner wall of valve body (1) is fixedly connected with the right side of sealing block (2) and is provided with the blocking plate (4), a plurality of through -holes (5) are formed in the lateral wall of blocking plate (4), the other end of cross bar (3) penetrates blocking plate (4) and is movably connected with it, the lateral wall of cross bar (3) is sleeved with first spring (17) between sealing block (2) and blocking plate (4), the inner chamber of valve body (1) is provided with control assembly on the right side of blocking plate (4), and the lateral wall of valve body (1) is provided with overpressure protection assembly.

2. The safety valve installed in the molecular sieve oxygen generating device according to claim 1, characterized in that: The control assembly includes a support plate (6) fixedly connected to the inner wall of the valve body (1), a screw sleeve (7) rotatably connected to the lateral wall of the support plate (6), a screw rod (8) threadedly connected to the inner side of the screw sleeve (7), the screw rod (8) having an open-ended cylindrical structure at one end, the other end of the cross bar (3) and the inner cavity of the screw rod (8), two clamping blocks (9) fixedly connected to the lateral wall of the cross bar (3) near the end face, two clamping grooves (10) formed in the inner wall of the screw rod (8), the clamping blocks (9) and the clamping grooves (10) being in sliding connection, a drive assembly provided on the lateral wall of the screw sleeve (7), and a blocking assembly provided on the lateral wall of the screw rod (8).

3. The safety valve installed in the molecular sieve oxygen generating apparatus according to claim 2, wherein: The drive assembly includes a worm gear (11) fixedly connected to the lateral wall of the screw sleeve (7), a worm (12) engaged with the rear side of the worm gear (11), a rotating wheel (13) fixedly connected to the top end of the worm (12) and penetrating the valve body (1), and the worm (12) being rotatably connected to the valve body (1).

4. The safety valve installed in the molecular sieve oxygen generating apparatus according to claim 2, wherein: The blocking assembly includes a connecting plate (14) fixedly connected to the lateral wall of the screw rod (8) near the left end, a plurality of top blocks (15) fixedly connected to the lateral wall of the connecting plate (14) and adapted to the through -holes (5), the number of the top blocks (15) being consistent with the number of the through -holes (5), and the lateral walls of the through -holes (5) and the top blocks (15) being obliquely arranged.

5. The safety valve installed in the molecular sieve oxygen generating apparatus according to claim 4, wherein: The connecting plate (14) is fixedly connected with a limiting rod (16), and the other end of the limiting rod (16) penetrates the blocking plate (4) and is movably connected thereto.

6. The safety valve installed in the molecular sieve oxygen generating apparatus according to claim 1, wherein: The overpressure protection assembly includes an exhaust pipe (18) fixedly connected to the lateral wall of the valve body (1), the exhaust pipe (18) being in communication with the inner cavity of the valve body (1), an active block (19) provided on the inner wall of the exhaust pipe (18), a second spring (20) fixedly connected between the active block (19) and the inner wall of the exhaust pipe (18), and a baffle (21) fixedly connected to the top end of the exhaust pipe (18).

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