Molecular sieve pressing device for nitrogen making machine

Abstract

The utility model discloses a molecular sieve pressing device for a nitrogen making machine, and particularly relates to the technical field of nitrogen making machines, the molecular sieve pressing device for the nitrogen making machine is arranged on an adsorption tower body, supporting legs are arranged on the periphery of the lower end of the adsorption tower body, and a bottle neck is arranged at the upper end of the adsorption tower body. A pressing mechanism is detachably connected to the upper end of the bottle neck, lifting lugs are fixedly connected to the periphery of the upper end of the adsorption tower body, and the upper ends of the supporting legs are fixedly connected with the lower end of the adsorption tower body. According to the molecular sieve pressing device for the nitrogen making machine, the pressing mechanism is arranged, so that a molecular sieve in the adsorption tower body can be always in a pressed state, strenuous movement caused by displacement of the molecular sieve is prevented, the yield and the purity of produced nitrogen are ensured, and the service life of the nitrogen making machine is prolonged. The pressure value in the tower can be detected and protected in real time, so that maintenance personnel are prompted to add and supplement molecular sieves in the tower in time.

Description

Technical Field

[0001] The utility model relates to the technical field of nitrogen generators, in particular to a molecular sieve pressing device for nitrogen generators. Background Art

[0002] Nitrogen generator is a nitrogen production equipment designed and manufactured according to pressure swing adsorption technology. Nitrogen generator uses high-quality imported carbon molecular sieve as adsorbent. According to different classification methods, namely cryogenic air separation, molecular sieve air separation (PSA) and membrane air separation, industrial nitrogen generators can be divided into three types. Nitrogen generator is a nitrogen production equipment designed and manufactured according to pressure swing adsorption technology. Nitrogen generator uses high-quality imported carbon molecular sieve (CMS) as adsorbent and uses the principle of pressure swing adsorption at room temperature to separate air and produce high-purity nitrogen. Usually two adsorption towers are used in parallel, and the imported pneumatic valve is automatically operated by the imported PLC to alternately perform pressurized adsorption and decompression regeneration to complete nitrogen and oxygen separation and obtain the required high-purity nitrogen.

[0003] The prior art has the following problems.

[0004] 1. In the existing molecular sieve compression device for nitrogen generators, during operation, high-pressure gas enters from the bottom of the adsorption tower. At the same time, the pressure at the top of the adsorption tower is lower and the pressure at the bottom is higher, resulting in uneven force on the upper and lower parts, causing the molecular sieve to move relative to each other. The friction generated can easily lead to pulverization of the carbon molecular sieve. After pulverization, the efficiency of the molecular sieve decreases until it loses the ability to adsorb oxygen, ultimately affecting the purity and flow of the output nitrogen, reducing its flame retardant performance, and after being injected into the goaf of a coal mine, there is a risk of fire in the goaf. Utility Model Content

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0006] A molecular sieve pressing device for a nitrogen generator is arranged on an adsorption tower body, wherein support legs are arranged around the lower end of the adsorption tower body, a bottleneck is arranged at the upper end of the adsorption tower body, a pressing mechanism is detachably connected to the upper end of the bottleneck, and lifting ears are fixedly connected around the upper end of the adsorption tower body.

[0007] Preferably, the clamping mechanism includes a flange cover, the lower end of the flange cover is detachably connected to the upper end of the bottleneck, the upper end of the flange cover is provided with connecting holes around, the upper end of the flange cover is provided with a threaded interface, the upper end of the flange cover is detachably connected to a clamping cylinder, the upper end of the clamping cylinder is penetrated by a through hole, the upper end of the clamping cylinder is detachably connected to a fixing plate, the right side of the upper end of the clamping cylinder is fixedly connected to a connecting pipe, the middle part of the connecting pipe is fixedly connected to a pressure gauge, one end of the connecting pipe is fixedly connected to a one-way stop valve, a piston rod is inserted in the middle part of the clamping cylinder, the lower end of the piston rod is detachably connected to a piston body, the lower end of the piston body is fixedly connected to a clamping push rod around, the lower end of the clamping push rod is fixedly connected to a molecular sieve, the left side of the piston rod is fixedly connected to a warning limit switch, and the right side of the piston rod is fixedly connected to a shutdown limit switch.

[0008] Preferably, a plurality of connection holes are evenly distributed on the circumference of the upper end surface of the flange cover, and the number of the connection holes is eight.

[0009] Preferably, the upper end of the flange cover is embedded and connected to the outer wall of the threaded interface.

[0010] Preferably, one end of the connecting pipe extends through the compression cylinder, and the other end extends through the flange cover into the bottleneck.

[0011] Preferably, the early warning limit switch and the shutdown limit switch are respectively arranged on the left and right sides of the outer circumference of the piston rod, and the early warning limit switch and the shutdown limit switch are both linked to the piston rod.

[0012] Preferably, the upper end of the supporting leg is fixedly connected to the lower end of the adsorption tower body, and the lower end of the bottleneck is detachably connected to the upper end of the adsorption tower body.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] The utility model can ensure that the molecular sieve in the adsorption tower body is always in a compressed state by setting a compression mechanism, and prevent violent movement caused by the displacement of the molecular sieve, thereby ensuring the output and purity of the output nitrogen, and can detect and protect the pressure value in the tower in real time, so as to prompt the maintenance personnel to add and supplement the molecular sieve in the tower in time to ensure the normal operation of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

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

[0017] Figure 3 , Figure 4 It is a detailed structural diagram of the clamping mechanism of the utility model;

[0018] Figure 5 It is a side view of the utility model.

[0019] In the figure: 1. adsorption tower body; 2. supporting legs; 3. bottleneck; 4. clamping mechanism; 5. lifting ear; 41. flange cover; 42. connecting hole; 43. threaded interface; 44. clamping cylinder; 45. perforation; 46. fixing plate; 47. connecting pipe; 48. pressure gauge; 49. one-way stop valve; 410. piston rod; 411. piston body; 412. clamping push rod; 413. molecular sieve; 414. warning limit switch; 415. shutdown limit switch. DETAILED DESCRIPTION

[0020] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0021] like Figure 1 , Figure 5 As shown, a molecular sieve pressing device for a nitrogen generator is arranged on an adsorption tower body 1, support legs 2 are arranged around the lower end of the adsorption tower body 1, a bottleneck 3 is arranged on the upper end of the adsorption tower body 1, and a pressing mechanism 4 is detachably connected to the upper end of the bottleneck 3. The pressing mechanism 4 enables the equipment to ensure that the molecular sieve in the adsorption tower body is always in a pressed state, while preventing violent movement caused by the displacement of the molecular sieve, ensuring the output and purity of the output nitrogen, and being able to perform real-time detection and protection of the pressure value in the tower, so as to prompt the maintenance personnel to add and supplement the molecular sieve in the tower in time to ensure the normal operation of the system, and the upper end of the adsorption tower body 1 is fixedly connected with a lifting ear 5, the upper end of the support leg 2 is fixedly connected to the lower end of the adsorption tower body 1, and the lower end of the bottleneck 3 is detachably connected to the upper end of the adsorption tower body 1.

[0022] like Figure 2 , Figure 3 , Figure 4As shown, the clamping mechanism 4 includes a flange cover 41, the lower end of the flange cover 41 is detachably connected to the upper end of the bottleneck 3, the upper end of the flange cover 41 is provided with connecting holes 42 around, the upper end of the flange cover 41 is provided with a threaded interface 43, the upper end of the flange cover 41 is detachably connected to a clamping cylinder 44, the upper end of the clamping cylinder 44 is penetrated with a through hole 45, the upper end of the clamping cylinder 44 is detachably connected to a fixing plate 46, the upper end of the clamping cylinder 44 is fixedly connected to a connecting pipe 47 on the right side of the upper end, and the middle of the connecting pipe 47 is fixed A pressure gauge 48 is connected, one end of the connecting pipe 47 is fixedly connected to a one-way stop valve 49, a piston rod 410 is inserted in the middle of the pressing cylinder 44, the lower end of the piston rod 410 is detachably connected to a piston body 411, a pressing push rod 412 is fixedly connected around the lower end of the piston body 411, a molecular sieve 413 is fixedly connected to the lower end of the pressing push rod 412, an early warning limit switch 414 is fixedly connected to the left side of the piston rod 410, and a shutdown limit switch 415 is fixedly connected to the right side of the piston rod 410;

[0023] The upper end surface of the flange cover 41 is equidistantly provided with a plurality of connection holes 42, and the number of the connection holes 42 is eight;

[0024] The upper end of the flange cover 41 is embedded and connected with the outer wall of the threaded interface 43;

[0025] One end of the connecting pipe 47 extends through the pressing cylinder 44, and the other end extends through the flange cover 41 to the bottleneck 3;

[0026] The early warning limit switch 414 and the shutdown limit switch 415 are respectively arranged on the left and right sides of the outer circumference of the piston rod 410 , and the early warning limit switch 414 and the shutdown limit switch 415 are both linked to the piston rod 410 .

[0027] As can be known from the above, a piston body 411 is slidably installed in the clamping cylinder 44, and a connecting pipe 47 is provided at the top of the clamping cylinder 44, six clamping push rods 412 are provided at the bottom of the piston body 411, and the six clamping push rods 412 are distributed in a ring array, a piston rod 410 is provided at the top of the piston body 411, and the piston rod 410 slides through the through hole 45.

[0028] The working principle of the utility model is as follows: first, through the set early warning limit switch 414, when the piston rod 410 reaches the early warning position, the system starts to warn, and at the same time, through the set shutdown limit switch 415, when the piston rod 410 reaches the shutdown position, the system automatically shuts down to control the position of the piston body 411, thereby controlling the working stroke of the molecular sieve 413, and then through the device when working, the molecular sieve 413 is displaced, and the gas in the adsorption tower body 1 enters the upper part of the piston body 411 through the one-way stop valve 49, so that the piston body 411 is displaced downward accordingly, and drives the pressing push rod 412 to move downward, thereby pressing the upper sieve plate of the molecular sieve 413 in the adsorption tower body 1. Due to the action of the one-way stop valve 49, the upper part of the piston body 411 The pressure is always higher than or equal to the pressure in the adsorption tower body 1, thereby ensuring the dynamic and stable compression of the molecular sieve 413 in the adsorption tower body 1 by the clamping cylinder 44. When the molecular sieve 413 is displaced and sinks, the piston body 411 drives the piston rod 410 to reach the position of the early warning limit switch 414, and the device starts to alarm to prompt the maintenance personnel to add molecular sieve 413. If it needs to be continued to be used, the clamping cylinder 44 drives the piston rod 410 to continue to move to the shutdown limit switch 415, that is, the extreme shutdown position, and the device automatically shuts down. At this time, the molecular sieve 413 must be added, and the device can operate normally. Further, it should be noted that the outer diameter of the piston body 411 is the same as the inner diameter of the bottleneck 3, and is slidably connected, which is conducive to accurately controlling the air pressure state in the adsorption tower body 1.

[0029] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A molecular sieve pressing device for a nitrogen generator, the molecular sieve pressing device for a nitrogen generator being arranged on an adsorption tower body (1), characterized in that: The lower end of the adsorption tower body (1) is provided with supporting legs (2) around the periphery, the upper end of the adsorption tower body (1) is provided with a bottleneck (3), the upper end of the bottleneck (3) is detachably connected to a clamping mechanism (4), the upper end of the adsorption tower body (1) is fixedly connected to ears (5), the clamping mechanism (4) comprises a flange cover (41), the lower end of the flange cover (41) is detachably connected to the upper end of the bottleneck (3), and the upper end of the flange cover (41) is provided with connecting members (5) around the periphery. The flange cover (41) is provided with a threaded interface (43) at its upper end, the flange cover (41) is detachably connected to a clamping cylinder (44) at its upper end, a through hole (45) is provided through the upper end of the clamping cylinder (44), the clamping cylinder (44) is detachably connected to a fixing plate (46) at its upper end, a connecting pipe (47) is fixedly connected to the right side of the upper end of the clamping cylinder (44), and a pressure gauge (48) is fixedly connected to the middle of the connecting pipe (47). One end of the connecting pipe (47) is fixedly connected to a one-way stop valve (49), a piston rod (410) is inserted in the middle of the pressing cylinder (44), the lower end of the piston rod (410) is detachably connected to a piston body (411), the lower end of the piston body (411) is fixedly connected to a pressing push rod (412) around the lower end, the lower end of the pressing push rod (412) is fixedly connected to a molecular sieve (413), and the left side of the piston rod (410) is fixedly connected to a warning limit A stop limit switch (414) is fixedly connected to the right side of the piston rod (410), a plurality of connection holes (42) are evenly distributed on the circumference of the upper end surface of the flange cover (41), and the number of the connection holes (42) is eight, the upper end of the flange cover (41) is embedded and connected to the outer wall of the threaded interface (43), one end of the connecting pipe (47) extends through the clamping cylinder (44), and the other end extends through the flange cover (41) to the bottleneck (3).

2. The molecular sieve pressing device for a nitrogen generator according to claim 1, characterized in that: The early warning limit switch (414) and the shutdown limit switch (415) are respectively arranged on the left and right sides of the outer peripheral surface of the piston rod (410), and the early warning limit switch (414) and the shutdown limit switch (415) are both linked to the piston rod (410).

3. The molecular sieve pressing device for a nitrogen generator according to claim 1, characterized in that: The upper end of the support leg (2) is fixedly connected to the lower end of the adsorption tower body (1), and the lower end of the bottleneck (3) is detachably connected to the upper end of the adsorption tower body (1).

Images