Follow-up valve structure of diaphragm type compressor

Abstract

The utility model discloses a diaphragm type compressor follow-up valve structure, which relates to the technical field of compressor follow-up valves, and comprises a follow-up valve main body, a valve cover and an oil inlet seat, and the top end of the outer wall of the follow-up valve main body is butted with the valve cover. When the follow-up valve structure of the diaphragm type compressor is used, the oil inlet seat is blocked by the blocking block through resetting of the spring, then the follow-up valve main body is closed, excessive oil in a cavity can be discharged without using a diaphragm, and the situation that parts need to be frequently replaced due to the fact that the diaphragm is easily damaged is avoided, so that the effect of facilitating stable work is achieved; according to the follow-up valve structure of the diaphragm compressor, limiting of the valve cover is canceled by moving the fixing plate, the interior of the follow-up valve body is maintained, the interior of the follow-up valve body can be maintained without disassembling the follow-up valve in a large range, time and energy are saved, and therefore the effect of facilitating internal maintenance is achieved when the follow-up valve structure of the diaphragm compressor is used.

Description

Technical Field

[0001] The utility model relates to the technical field of compressor follower valves, in particular to a diaphragm type compressor follower valve structure. Background Art

[0002] The diaphragm compressor is a special type of positive displacement compressor that compresses and delivers gas by reciprocating the diaphragm in the cylinder. The diaphragm is clamped by two limiting plates along the periphery to form a cylinder. The diaphragm is driven mechanically or hydraulically to reciprocate in the cylinder, thereby achieving gas compression and delivery. The compressor follower valve is a valve used to control the operation of the compressor. Its working principle is based on the pressure change of the compressor; and in the diaphragm compressor, the function of the follower valve is mainly to discharge excess oil in the oil chamber by regulating the oil pressure.

[0003] During the use of the diaphragm compressor, when it needs to be assisted by a follower valve, the diaphragm is first clamped in the middle by the follower valve body and the valve cover, and then the exhaust pressure is introduced into one side of the diaphragm through the intake pipe, and then the oil pressure is introduced into the other side of the diaphragm through the oil inlet seat. When the oil pressure is high enough, the pressure difference on both sides of the diaphragm will cause the diaphragm to deform. After the diaphragm is deformed, the hydraulic oil can be discharged at the oil outlet, and then the excess oil in the oil chamber is discharged; but during the use of the compressor follower valve, the diaphragm is a wearing part, and the movement frequency of the follower valve diaphragm is also very fast. The diaphragm is prone to fatigue damage, which leads to the need for staff to regularly replace the diaphragm in order to ensure the stable operation of the follower valve. Once the diaphragm is damaged, the oil is easy to mix into the compressed gas through the air inlet, thereby causing the compressed gas to be contaminated. Utility Model Content

[0004] The purpose of the utility model is to provide a diaphragm compressor follower valve structure to solve the problems raised by the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a diaphragm compressor follower valve structure, including a follower valve body, a valve cover and an oil inlet seat, the valve cover is connected to the top end of the outer wall of the follower valve body, and the oil inlet seat is connected to the bottom end of the follower valve body, and an oil outlet is opened in the middle of the outer wall of the follower valve body.

[0006] Preferably, an electric push rod is slidably connected to the middle of the top end of the valve cover, and a lifting seat is slidably connected to the top end of the inner wall of the follower valve body.

[0007] Preferably, an air intake duct is provided inside the electric push rod, and a transmission rod is connected to the bottom end of the lifting seat through a limiting hole.

[0008] Preferably, a spring is sleeved on the outer wall of the transmission rod, and a pressure block is butt-jointed at the bottom end of the transmission rod.

[0009] Preferably, a sealing block is connected to the middle of the bottom end of the pressing block, and a cleaning seat is connected to the outer wall of the bottom end of the pressing block.

[0010] Preferably, fixing plates are connected to both sides of the outer wall of the valve cover, and threaded pins are connected to the internal threads on the upper and lower sides of the fixing plates.

[0011] Preferably, a fixing pin is butted against the middle of the outer wall of the fixing plate, and a cleaning piece is butted against the bottom end of the outer wall of the fixing plate.

[0012] Preferably, an auxiliary hole is formed on a side of the outer wall of the follower valve body close to the cleaning member.

[0013] Compared with the prior art, the beneficial effect of the utility model is that when the diaphragm compressor follower valve structure is in use, the sealing block blocks the oil inlet seat through spring reset, thereby closing the follower valve body, and then the excess oil in the cavity can be discharged without using a diaphragm, and there is no need to worry about the diaphragm being easily damaged and requiring frequent replacement of parts, thereby facilitating stable operation, and the limit on the valve cover is cancelled by moving the fixed plate, thereby exposing the interior of the follower valve body for inspection, and then the interior of the follower valve can be inspected without large-scale disassembly of the follower valve, saving time and effort, thereby facilitating internal maintenance when the diaphragm compressor follower valve structure is in use.

[0014] 1. When the diaphragm compressor is assisted by the follower valve to work, the oil is first directed to the blocking block through the oil inlet seat, so that the blocking block drives the pressure block to move upward, and then the oil is led out of the follower valve body through the oil outlet; when the oil pressure decreases, the spring resets so that the pressure block drives the blocking block to move downward until the blocking block blocks the outlet at the top of the oil inlet seat, and then the follower valve body is closed, and the excess oil in the cavity can be discharged without using a diaphragm, and there is no need to worry about the diaphragm being easily damaged, resulting in the need for frequent replacement of parts, and the oil being mixed into the compressed gas, so that when the follower valve structure of the diaphragm compressor is used, it plays a role in facilitating stable operation;

[0015] 2. When the diaphragm compressor is assisted by the follower valve, firstly, the threaded pin is rotated to disconnect the follower valve body and the valve cover, and then the fixing plate is moved to disconnect the fixing pin from the valve cover, so that the inside of the follower valve body is exposed for inspection and maintenance, and then the internal components of the follower valve can be exposed for inspection and replacement without large-scale disassembly of the follower valve, saving time and energy, thereby facilitating internal maintenance when the follower valve structure of the diaphragm compressor is used. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0017] Figure 2This is a schematic diagram of the three-dimensional structure of the main body of the servo valve of the utility model;

[0018] Figure 3 This is a schematic diagram of the main cutaway structure of the utility model;

[0019] Figure 4 This is a schematic diagram of the left-side stereoscopic cutaway structure of the utility model;

[0020] Figure 5 This is a schematic diagram of the three-dimensional structure of the lifting seat of the utility model;

[0021] Figure 6 This is a schematic diagram of the main cutaway structure of the lifting seat of the utility model;

[0022] Figure 7 It is a schematic diagram of the three-dimensional cutaway structure of the cleaning element of the utility model.

[0023] In the figure: 1. Follow-up valve body; 2. Valve cover; 3. Oil inlet seat; 4. Oil outlet; 5. Electric push rod; 6. Air intake pipe; 7. Lifting seat; 8. Transmission rod; 9. Spring; 10. Pressure block; 11. Sealing block; 12. Cleaning seat; 13. Fixing plate; 14. Threaded pin; 15. Fixing pin; 16. Cleaning piece; 17. Auxiliary hole. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1-Figure 6 The utility model provides a technical solution: a diaphragm compressor follower valve structure, including a follower valve body 1, a valve cover 2 and an oil inlet seat 3, the top end of the outer wall of the follower valve body 1 is connected to the valve cover 2, and the bottom end of the follower valve body 1 is connected to the oil inlet seat 3, and the middle part of the outer wall of the follower valve body 1 is provided with an oil outlet 4; the middle part of the top end of the valve cover 2 is slidably connected to an electric push rod 5, and the top end of the inner wall of the follower valve body 1 is slidably connected to a lifting seat 7; an air intake pipe 6 is provided inside the electric push rod 5, and the lifting seat 7 is provided inside the electric push rod 5. The bottom end of the lowering seat 7 is connected to a transmission rod 8 through a limiting hole; a spring 9 is sleeved on the outer wall of the transmission rod 8, and a pressure block 10 is butted against the bottom end of the transmission rod 8; a blocking block 11 is connected to the middle of the bottom end of the pressure block 10, and a cleaning seat 12 is connected to the outer wall of the bottom end of the pressure block 10; the outer wall of the cleaning seat 12 fits the inner wall of the follow-up valve body 1, the top end of the spring 9 is connected to the lifting seat 7, the bottom end of the spring 9 is connected to the pressure block 10, and the transmission rods 8 are distributed at equal angles on the lifting seat 7 and the pressure block 10.

[0026] In specific implementation, in the process of assisting the diaphragm compressor to work through the follower valve, in order to prevent the diaphragm from being damaged and affecting the work of the follower valve, the oil with oil pressure is first guided to the blocking block 11 through the oil inlet seat 3, so that the blocking block 11 drives the pressure block 10 to move upward. Since the top of the pressure block 10 is connected to the transmission rod 8, the movement of the pressure block 10 drives the transmission rod 8 to move together, and then the transmission rod 8 moves upward to drive the lifting seat 7 to move upward, and the pressure block 10 squeezes the spring 9 when it moves upward, causing the spring 9 to deform, until the outlet at the top of the oil inlet seat 3 appears, and then the oil is led out of the follower valve body 1 through the oil outlet 4;

[0027] When the oil pressure is reduced, the spring 9 is reset to generate a downward elastic force, so that the pressure block 10 drives the blocking block 11 to move downward until the blocking block 11 blocks the outlet at the top of the oil inlet seat 3, and the elastic force is generated by multiple springs 9 at the same time, so that the pressure block 10 is no longer pushed downward from the center, thereby preventing the pressure block 10 from deflecting along the center, and then closing the follower valve body 1, and when the situation is urgent and the oil channel needs to be quickly closed, the electric push rod 5 can be started to generate a downward thrust on the lifting seat 7, so that the blocking block 11 quickly blocks the oil inlet seat 3, and because the bottom end of the lifting seat 7 is connected to the cleaning seat 12, the movement of the lifting seat 7 drives the cleaning seat 12 to move together;

[0028] Furthermore, when the lifting seat 7 moves, the outer wall of the cleaning seat 12 rubs against the inner wall of the follow-up valve body 1, and then the area on the inner wall of the follow-up valve body 1 through which the oil passes is cleaned, so that the excess oil in the cavity can be discharged without using a diaphragm, and there is no need to worry about the diaphragm being easily damaged, resulting in the need for frequent replacement of parts, and the oil being mixed into the compressed gas. Therefore, when the follow-up valve structure of the diaphragm compressor is used, it plays a role in facilitating stable operation and preventing oil from contaminating the gas.

[0029] See also Figure 1 , Figure 2 , Figure 3 and Figure 7 It can be seen that the two sides of the outer wall of the valve cover 2 are connected with fixing plates 13, and the upper and lower sides of the fixing plate 13 are internally threadedly connected with threaded pins 14; a fixing pin 15 is connected to the middle of the outer wall of the fixing plate 13, and a cleaning piece 16 is connected to the bottom end of the outer wall of the fixing plate 13; an auxiliary hole 17 is opened on the side of the outer wall of the follower valve body 1 close to the cleaning piece 16; the cleaning piece 16 corresponds to the auxiliary hole 17, and a limiting hole corresponding to the fixing pin 15 is opened on the outer wall of the valve cover 2.

[0030] In specific implementation, when the diaphragm compressor is operated by the follower valve, as the use time increases, when the components inside the follower valve need to be replaced, the threaded pin 14 is first rotated to disconnect the follower valve body 1 and the valve cover 2, and then the fixing plate 13 is moved. Since the fixing plate 13 is connected with the fixing pin 15 and the cleaning member 16, the movement of the fixing plate 13 drives the fixing pin 15 and the cleaning member 16 to move together until the fixing pin 15 is disconnected from the valve cover 2, thereby canceling the limit between the valve cover 2 and the follower valve body 1, and the cleaning member 16 rubs against the auxiliary hole 17 when moving, and then removes the dirt in the auxiliary hole 17;

[0031] Furthermore, the auxiliary hole 17 can be observed to check whether there is oil in the auxiliary hole 17, and then the sealing state of the follower valve body 1 can be checked to see if there is any problem. Then, the valve cover 2 can be disconnected from the follower valve body 1, and the inside of the follower valve body 1 can be exposed for inspection and repair. Then, the internal components of the follower valve can be exposed for inspection and replacement without large-scale disassembly of the follower valve, saving time and energy, thereby facilitating internal maintenance when the follower valve structure of the diaphragm compressor is used.

[0032] When it is necessary to fix the valve cover 2 and the follower valve body 1, first move the fixing plate 13 to fit the valve cover 2. At this time, the cleaning member 16 is connected to the auxiliary hole 17, and the fixing pin 15 passes through the valve cover 2 and connects to the follower valve body 1, thereby limiting the valve cover 2. Then, rotate the threaded pin 14 to connect the follower valve body 1 and the valve cover 2, and then fix the valve cover 2 to the follower valve body 1.

[0033] To sum up, when the diaphragm compressor follower valve structure is used, the follower valve body 1 is first connected to the valve cover 2, and then the exhaust pressure is introduced into the lifting seat 7 through the intake pipe 6, so that the lifting seat 7 drives the pressure block 10 to move downward through the transmission rod 8, until the blocking block 11 blocks the inlet pipe inside the oil inlet seat 3, thereby preventing oil from entering. This is the prior art and will not be elaborated on here. The spring 9 is reset so that the blocking block 11 blocks the oil inlet seat 3, thereby closing the follower valve body 1, and then the excess oil in the cavity can be discharged without using a diaphragm, and there is no need to worry about the diaphragm being easily damaged and requiring frequent replacement of parts. The limit on the valve cover 2 is cancelled by moving the fixing plate 13, and then the interior of the follower valve body 1 is exposed for inspection and maintenance, and then the follower valve does not need to be disassembled on a large scale, and its interior can be inspected, saving time and energy. The content not described in detail in this description belongs to the prior art known to professional and technical personnel in this field.

[0034] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A diaphragm compressor follower valve structure, comprising a follower valve body (1), a valve cover (2) and an oil inlet seat (3), characterized in that: The top end of the outer wall of the follower valve body (1) is butted with a valve cover (2), and the bottom end of the follower valve body (1) is butted with an oil inlet seat (3). The middle part of the outer wall of the follower valve body (1) is provided with an oil outlet (4). The middle part of the top end of the valve cover (2) is slidably connected with an electric push rod (5). The top end of the inner wall of the follower valve body (1) is slidably connected with a lifting seat (7). An air intake pipe (6) is provided inside the electric push rod (5). The bottom end of the lifting seat (7) is connected with a transmission rod (8) through a limiting hole. The outer wall of the transmission rod (8) is sleeved with a spring (9), and the bottom end of the transmission rod (8) is butted with a pressure block (10). The middle part of the bottom end of the pressure block (10) is connected with a blocking block (11), and the outer wall of the bottom end of the pressure block (10) is connected with a cleaning seat (12).

2. The diaphragm compressor follower valve structure according to claim 1, characterized in that: The outer walls of the valve cover (2) are connected to fixing plates (13) on both sides, and threaded pins (14) are internally threadedly connected to the upper and lower sides of the fixing plates (13).

3. The diaphragm compressor follower valve structure according to claim 2, characterized in that: A fixing pin (15) is butted against the middle of the outer wall of the fixing plate (13), and a cleaning piece (16) is butted against the bottom end of the outer wall of the fixing plate (13).

4. The diaphragm compressor follower valve structure according to claim 3, characterized in that: An auxiliary hole (17) is provided on the side of the outer wall of the follower valve body (1) close to the cleaning member (16).

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