Air inlet valve of screw air compressor

Abstract

The utility model relates to the technical field of air inlet valves, in particular to a screw air compressor air inlet valve which comprises a valve seat, a first valve body is fixedly connected to the front end of the valve seat, a second valve body is fixedly connected to the rear end of the valve seat, and locking assemblies are fixedly connected to the left portion of the inner wall face of the first valve body and the left portion of the inner wall face of the second valve body. The right end of the first valve body and the right end of the second valve body are both movably connected with control assemblies in a penetrating mode, and the right inner wall face of the first valve body and the right inner wall face of the second valve body are both fixedly connected with connecting assemblies. According to the air inlet valve of the screw type air compressor, the threaded strip on the conical locking valve element is in threaded connection with the threaded groove in the conical locking seat, movement of the conical locking valve element and the circular valve element is achieved, the air inlet amount can be adjusted according to the actual air use requirement, the air compressor can stably operate under different working conditions, and the service life of the air compressor is prolonged. And the flexibility of air inlet control is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to air inlet valve technical field, especially a screw air compressor air inlet valve. BACKGROUND

[0002] Air compressor, full name air compressor is the main body in gas source device, it is the device of the mechanical energy conversion of prime mover (usually electric motor) into gas pressure energy, is the air pressure generating device of compressed air, is the most commonly used air power providing equipment in industrial and mining enterprises, usually, air compressor divides into screw air compressor, piston air compressor etc.;

[0003] As the gas source equipment widely used in industrial production, the performance of the air inlet valve of the screw air compressor plays a key role in the running efficiency, stability and reliability of the whole machine, however, the traditional screw air compressor air inlet valve can only realize simple on-off control, and it is difficult to flexibly adjust the air intake according to the actual operation condition of the air compressor, such as different air demand, load change, etc., which leads to the situation that the air compressor is easy to appear insufficient or excessive air supply in actual operation, not only reduces the energy utilization efficiency, but also easily has adverse effects on the normal operation of the rear-end air using equipment, in addition, the traditional screw air compressor air inlet valve adopts a single air inlet channel design, if a fault occurs, the air compressor will be forced to stop, which seriously affects the production continuity and brings great economic loss to the enterprise, therefore, we launch a screw air compressor air inlet valve. SUMMARY

[0004] The main purpose of the utility model is to provide a screw air compressor air inlet valve, which can effectively solve the problems in the background art.

[0005] To achieve the above purpose, the technical scheme adopted by the utility model is:

[0006] A screw air compressor air inlet valve, comprising a valve seat, a first valve body is fixedly connected to the front end of the valve seat, a second valve body is fixedly connected to the rear end of the valve seat, and the second valve body and the first valve body are the same structure, an input pipe is fixedly connected to the left end of the first valve body and the left end of the second valve body, an air inlet connection flange is fixedly connected to the upper end of the two input pipes, an air compressor air inlet pipe is fixedly connected to the lower part of the outer surface of the first valve body and the lower part of the outer surface of the second valve body, a locking assembly is fixedly connected to the left part of the inner wall surface of the first valve body and the left part of the inner wall surface of the second valve body, a control assembly is movably connected to the right end of the first valve body and the right end of the second valve body, and a connecting assembly is fixedly connected to the right inner wall surface of the first valve body and the right inner wall surface of the second valve body.

[0007] The control assembly comprises a fixed ring and a movable rod, the outer surface of the movable rod is fixedly sleeved with a first rubber sealing sleeve, the right end of the movable rod is fixedly connected with a control rotating wheel, the left end of the movable rod is fixedly connected with a circular valve core, the outer surface of the circular valve core is fixedly sleeved with a second rubber sealing sleeve, the left end of the circular valve core is fixedly connected with a rubber sealing gasket, the left end of the rubber sealing gasket is fixedly connected with a conical locking valve core, the outer surface of the conical locking valve core is provided with a threaded strip, and the left end of the fixed ring is fixedly connected with the right end of the first valve body.

[0008] Preferably, the locking assembly comprises a conical locking seat, the right end of the conical locking seat is provided with a conical locking cavity, the inner wall surface of the conical locking cavity is provided with a threaded groove, the left end of the conical locking seat is provided with an air inlet cavity penetrating in and out, the outer surface of the conical locking seat is fixedly connected with the inner wall surface of the first valve body, and the left end of the conical locking seat is fixedly connected with the left inner wall surface of the first valve body.

[0009] By adopting the above technical scheme: the conical locking cavity provided at the right end of the conical locking seat cooperates with the conical locking valve core, and the characteristics of the conical structure are utilized, so that when the conical locking valve core is embedded in the conical locking seat, omnidirectional and close fitting can be realized, and compared with the traditional plane sealing, the sealing contact area is increased.

[0010] Preferably, the right part of the input pipe is fixedly sleeved in the corresponding air inlet cavity.

[0011] By adopting the above technical scheme: the right part of the input pipe and the corresponding air inlet cavity are fixedly sleeved, so that the tight and stable connection between the two can be realized.

[0012] Preferably, the movable rod and the first rubber sealing sleeve are movably sleeved in the fixed ring, the outer surface of the first rubber sealing sleeve is in contact with the inner wall surface of the fixed ring, and the outer surface of the second rubber sealing sleeve and the outer surface of the rubber sealing gasket are in contact with the inner wall surface of the first valve body.

[0013] By adopting the above technical scheme: the first rubber sealing sleeve outside the movable rod is in contact with the inner wall of the fixed ring, forming the first sealing barrier, which effectively prevents gas from leaking along the gap between the movable rod and the fixed ring, at the same time, the second rubber sealing sleeve outside the circular valve core and the rubber sealing gasket at the left end thereof are closely fitted with the inner wall of the first valve body, forming the second strong sealing defense line, the double sealing structure greatly reduces the possibility of gas leakage, ensures that the air inlet valve can maintain good sealing performance under different pressure conditions, avoids energy waste caused by gas leakage, and improves the operation efficiency and compression performance of the air compressor.

[0014] Preferably, the shape and size of the conical locking valve core is matched with the shape and size of the conical locking cavity, the shape and size of the threaded strip is matched with the shape and size of the threaded groove, and the conical locking valve core is threadedly connected in the conical locking cavity through the threaded strip and the threaded groove.

[0015] By adopting the above technical scheme, the matched threaded structure provides the conical locking valve core with stable positioning function, and even if the conical locking valve core is affected by airflow impact or equipment vibration during operation of the air compressor, the conical locking valve core can be kept at a set position by the constraint of the thread, which ensures that the air intake amount of the air intake valve remains stable during long-time operation.

[0016] Preferably, the connecting assembly comprises a variable stiffness spring, a connecting block is fixedly connected to the left end of the variable stiffness spring, a sleeve hole that penetrates left and right is formed in the middle of the right end of the variable stiffness spring, and the right end of the variable stiffness spring is fixedly connected with the right inner wall surface of the first valve body.

[0017] By adopting the above technical scheme, the variable stiffness spring can absorb and buffer vibration and impact energy through elastic deformation of the variable stiffness spring.

[0018] Preferably, the movable rod and the first rubber sealing sleeve are located in the variable stiffness spring and the sleeve hole, and gaps exist between the movable rod, the first rubber sealing sleeve, the inner wall surface of the variable stiffness spring and the inner wall surface of the sleeve hole.

[0019] By adopting the above technical scheme, when the movable rod is driven to rotate by rotating the control rotating wheel, the movable rod can be driven to rotate flexibly without being interfered by the inner wall of the variable stiffness spring or the inner wall of the sleeve hole, so that the conical locking valve core and the circular valve core can be driven to open or close.

[0020] Preferably, the left end surface of the connecting block is always in contact with the right end surface of the circular valve core.

[0021] By adopting the above technical scheme, when the air intake valve needs to be opened or closed, the connecting block is moved by the expansion and contraction of the variable stiffness spring, and the connecting block directly applies force to the circular valve core, so that the circular valve core can respond to the change of the spring force in time and move correspondingly.

[0022] Compared with the prior art, the air intake valve has the following beneficial effects:

[0023] 1、In the air intake valve, the movable rod is driven to rotate by rotating the control rotating wheel, the threaded strip on the conical locking valve core is threadedly connected with the threaded groove in the conical locking seat, the movement of the conical locking valve core and the circular valve core is realized, the air intake amount can be adjusted according to actual air demand, the air compressor can stably operate under different working conditions, the flexibility of air intake control is greatly improved, the situation of insufficient or excessive air supply is effectively avoided, and the energy utilization efficiency is improved.

[0024] 2、The utility model discloses a multiple sealing structure, on the basis of the cooperation sealing of the conical locking valve core and the conical locking cavity, the second rubber sealing sleeve of circular valve core outer surface sleeve joint and its connected rubber sealing pad are closely combined with the first valve body inner wall, form reliable sealing defense line, can effectively resist the scour of high pressure, high -speed airflow, greatly reduce the risk of gas leakage, not only reduce energy waste, still prolong the service life of equipment internal component, reduce maintenance cost.

[0025] 3、The utility model discloses a double valve body design of first valve body and second valve body, when the first valve body fails, can switch to second valve body work quickly, ensure that air compressor continuous and stable operation, effectively avoid the shutdown phenomenon caused by admission valve failure, guarantee the continuity of production, reduce the economic loss of enterprise because of equipment failure. ACCURACY OF DRAWINGS

[0026] Figure 1 It is whole structure schematic diagram of a kind of screw air compressor admission valve of the utility model;

[0027] Figure 2 It is structure cutaway view (wherein first valve body is cut) of a kind of screw air compressor admission valve of the utility model;

[0028] Figure 3 It is structure cutaway view (wherein conical locking seat is cut) of locking assembly of a kind of screw air compressor admission valve of the utility model;

[0029] Figure 4 It is structure schematic diagram of control assembly of a kind of screw air compressor admission valve of the utility model;

[0030] Figure 5 It is combined connection structure schematic diagram (wherein conical locking seat is cut) of conical locking valve core and conical locking seat of a kind of screw air compressor admission valve of the utility model;

[0031] Figure 6 It is structure schematic diagram of connecting assembly of a kind of screw air compressor admission valve of the utility model.

[0032] In the drawing: 1, valve seat;2, first valve body;3, second valve body;4, input pipe;5, admission connection flange;6, air compressor admission pipe;7, locking assembly;8, control assembly;9, connecting assembly;71, conical locking seat;72, conical locking cavity;73, thread groove;74, admission cavity;81, fixed ring;82, movable rod;83, first rubber sealing sleeve;84, control rotary wheel;85, circular valve core;86, second rubber sealing sleeve;87, rubber sealing pad;88, conical locking valve core;89, thread strip;91, variable stiffness spring;92, connecting block;93, sleeve hole. DETAILED DESCRIPTION

[0033] In order to make the technical means, creative features, purposes and effects of the utility model easy to understand, the utility model is further described below in combination with specific embodiments.

[0034] In the description of the utility model, it should be pointed out that the directions or position relationships indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end" and "the other end" are the directions or position relationships shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements indicated must have a particular direction, be constructed and operated in a particular direction, and therefore cannot be understood as limiting the utility model. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0035] In the description of the utility model, it should be pointed out that unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "connection" and the like should be understood broadly, for example, "connection" can be fixed connection, can also be detachable connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements. For ordinary skilled persons in the art, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.

[0036] Please refer to Figures 1-6 The utility model provides a technical scheme:

[0037] A screw type air compressor inlet valve, including valve seat 1, first valve body 2 is fixedly connected to the front end of valve seat 1, second valve body 3 is fixedly connected to the rear end of valve seat 1, and the structure of second valve body 3 and first valve body 2 is same, and the left end of first valve body 2 and the left end of second valve body 3 are both fixedly connected with input pipe 4, and the upper end of two input pipes 4 is fixedly connected with inlet connection flange 5, the lower part of the outer surface of first valve body 2 and the lower part of the outer surface of second valve body 3 are both fixedly connected with air compressor inlet pipe 6, the left part of the inner wall surface of first valve body 2 and the left part of the inner wall surface of second valve body 3 are both fixedly connected with locking assembly 7, and the right end of first valve body 2 and the right end of second valve body 3 are both movably connected with control assembly 8, and the right inner wall surface of first valve body 2 and the right inner wall surface of second valve body 3 are both fixedly connected with connecting assembly 9.

[0038] In the embodiment, the control assembly 8 comprises a fixed ring 81 and a movable rod 82, the outer surface of the movable rod 82 is fixedly sleeved with a first rubber sealing sleeve 83, the right end of the movable rod 82 is fixedly connected with a control rotating wheel 84, the left end of the movable rod 82 is fixedly connected with a circular valve core 85, the outer surface of the circular valve core 85 is fixedly sleeved with a second rubber sealing sleeve 86, the left end of the circular valve core 85 is fixedly connected with a rubber sealing gasket 87, the left end of the rubber sealing gasket 87 is fixedly connected with a tapered locking valve core 88, the outer surface of the tapered locking valve core 88 is provided with a threaded strip 89, and the left end of the fixed ring 81 is fixedly connected with the right end of the first valve body 2; the locking assembly 7 comprises a tapered locking seat 71, the right end of the tapered locking seat 71 is provided with a tapered locking cavity 72, the inner wall surface of the tapered locking cavity 72 is provided with a threaded groove 73, the left end of the tapered locking seat 71 is provided with an air inlet cavity 74 penetrating the inner and outer walls, the outer surface of the tapered locking seat 71 is fixedly connected with the inner wall surface of the first valve body 2, and the left end of the tapered locking seat 71 is fixedly connected with the left inner wall surface of the first valve body 2; the right part of the input pipe 4 is fixedly sleeved in the corresponding air inlet cavity 74; the movable rod 82 and the first rubber sealing sleeve 83 are movably sleeved in the fixed ring 81, the outer surface of the first rubber sealing sleeve 83 is in contact with the inner wall surface of the fixed ring 81, the outer surface of the second rubber sealing sleeve 86 and the outer surface of the rubber sealing gasket 87 are in contact with the inner wall surface of the first valve body 2; the shape and size of the tapered locking valve core 88 are matched with the shape and size of the tapered locking cavity 72, the shape and size of the threaded strip 89 are matched with the shape and size of the threaded groove 73, and the tapered locking valve core 88 is threadedly connected in the tapered locking cavity 72 through the threaded strip 89 and the threaded groove 73; the connecting assembly 9 comprises a variable stiffness spring 91, the left end of the variable stiffness spring 91 is fixedly connected with a connecting block 92, the right end of the variable stiffness spring 91 is provided with a sleeve hole 93 penetrating the left and right walls, the right end of the variable stiffness spring 91 is fixedly connected with the right inner wall surface of the first valve body 2; the movable rod 82 and the first rubber sealing sleeve 83 are located in the variable stiffness spring 91 and the sleeve hole 93, and the movable rod 82 and the first rubber sealing sleeve 83 are spaced from the inner wall surface of the variable stiffness spring 91 and the inner wall surface of the sleeve hole 93; the left end surface of the connecting block 92 is always in contact with the right end surface of the circular valve core 85.

[0039] It needs to be explained that the utility model discloses a screw air compressor inlet valve, in the use process, the inlet connection flange 5 is fixed with the external inlet pipeline through the bolt, makes the input pipe 4 and the external inlet source are connected, connects the air compressor inlet pipe 6 to the inlet end of screw air compressor, and the external gas enters from the inlet connection flange 5, flows into the inlet cavity 74 through the input pipe 4, at this time, if the inlet valve is in the closed state, the conical locking valve core 88 is tightly embedded in the conical locking cavity 72 under the cooperation of the thread strip 89 and the thread groove 73, and the rubber sealing gasket 87 and the second rubber sealing sleeve 86 are also tightly attached to the inner wall of the first valve body 2, preventing the gas from entering the air compressor inlet pipe 6, when needing to open the inlet valve, rotating the control rotating wheel 84, the control rotating wheel 84 drives the movable rod 82 to rotate, and then the conical locking valve core 88 rotates, and since the thread strip 89 is connected with the thread groove 73, the conical locking valve core 88 starts to move to the right, and gradually separates from the conical locking cavity 72, at the same time, the circular valve core 85 also moves to the right along with the movable rod 82, and the first rubber sealing sleeve 83 slides in the fixed ring 81, along with the right movement of the conical locking valve core 88 and the circular valve core 85, the gas passes through the inlet cavity 74, flows into the air compressor inlet pipe 6 through the inside of the first valve body 2, enters the screw air compressor, and completes the inlet process, in the process, the variable stiffness spring 91 provides corresponding elastic force according to the distance of the movement of the circular valve core 85 and the gas pressure, and assists the stable movement of the circular valve core 85, the connecting block 92 is always in contact with the right end surface of the circular valve core 85, and the spring force is transmitted, when the first valve body 2 fails, switches to the work of the second valve body 3, and simultaneously closes the inlet passage of the first valve body 2, according to the operation process of opening the second valve body 3 in the normal working stage, rotates the control rotating wheel 84 corresponding to the second valve body 3, opens the inlet passage of the second valve body 3, makes the gas flow into the air compressor inlet pipe 6 from the inlet connection flange 5 of the second valve body 3 through the input pipe 4 and the inlet cavity 74, and guarantees the normal inlet work of the screw air compressor.

[0040] The basic principle and main features of the utility model and the advantages of the utility model are shown and described above. It should be understood by those skilled in the art that the utility model is not limited to the above-mentioned embodiments, and the above-mentioned embodiments and the description in the specification only illustrate the principle of the utility model, and various changes and improvements can be made to the utility model without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed. The protection scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A screw air compressor inlet valve comprising a valve seat (1), characterized in that: The front end of the valve seat (1) is fixedly connected with a first valve body (2), the rear end of the valve seat (1) is fixedly connected with a second valve body (3), the second valve body (3) and the first valve body (2) are the same structure, the left end of the first valve body (2) and the left end of the second valve body (3) are fixedly connected with an input pipe (4), the upper end of the two input pipes (4) is fixedly connected with an air inlet flange (5), the lower part of the outer surface of the first valve body (2) and the lower part of the outer surface of the second valve body (3) are fixedly connected with an air compressor air inlet pipe (6), the left part of the inner wall surface of the first valve body (2) and the left part of the inner wall surface of the second valve body (3) are fixedly connected with a locking assembly (7), the right end of the first valve body (2) and the right end of the second valve body (3) are movably connected with a control assembly (8), and the right inner wall surface of the first valve body (2) and the right inner wall surface of the second valve body (3) are fixedly connected with a connecting assembly (9). The control assembly (8) comprises a fixed ring (81) and a movable rod (82), the outer surface of the movable rod (82) is fixedly sleeved with a first rubber sealing sleeve (83), the right end of the movable rod (82) is fixedly connected with a control rotating wheel (84), the left end of the movable rod (82) is fixedly connected with a circular valve core (85), the outer surface of the circular valve core (85) is fixedly sleeved with a second rubber sealing sleeve (86), the left end of the circular valve core (85) is fixedly connected with a rubber sealing gasket (87), the left end of the rubber sealing gasket (87) is fixedly connected with a tapered locking valve core (88), the outer surface of the tapered locking valve core (88) is provided with a threaded strip (89), and the left end of the fixed ring (81) is fixedly connected with the right end of the first valve body (2).

2. A screw air compressor inlet valve according to claim 1, wherein: The locking assembly (7) comprises a tapered locking seat (71), the right end of the tapered locking seat (71) is provided with a tapered locking cavity (72), the inner wall surface of the tapered locking cavity (72) is provided with a threaded groove (73), the left end of the tapered locking seat (71) is provided with an air inlet cavity (74) penetrating in and out, the outer surface of the tapered locking seat (71) is fixedly connected with the inner wall surface of the first valve body (2), and the left end of the tapered locking seat (71) is fixedly connected with the left inner wall surface of the first valve body (2).

3. A screw air compressor inlet valve according to claim 1, wherein: The right part of the input pipe (4) is fixedly sleeved in the corresponding air inlet cavity (74).

4. A screw air compressor inlet valve according to claim 1, wherein: The movable rod (82) and the first rubber sealing sleeve (83) are movably sleeved in the fixed ring (81), the outer surface of the first rubber sealing sleeve (83) is in contact with the inner wall surface of the fixed ring (81), and the outer surface of the second rubber sealing sleeve (86) and the outer surface of the rubber sealing gasket (87) are in contact with the inner wall surface of the first valve body (2).

5. A screw air compressor inlet valve according to claim 1, wherein: The shape and size of the tapered locking valve core (88) are matched with the shape and size of the tapered locking cavity (72), the shape and size of the threaded strip (89) are matched with the shape and size of the threaded groove (73), and the tapered locking valve core (88) is threadedly connected in the tapered locking cavity (72) through the threaded strip (89) and the threaded groove (73).

6. A screw air compressor inlet valve according to claim 1, wherein: The connecting assembly (9) comprises a variable stiffness spring (91), the left end of the variable stiffness spring (91) is fixedly connected with a connecting block (92), the middle part of the right end of the variable stiffness spring (91) is provided with a sleeve hole (93) penetrating leftward and rightward, and the right end of the variable stiffness spring (91) is fixedly connected with the right inner wall surface of the first valve body (2).

7. A screw air compressor inlet valve according to claim 1, wherein: The movable rod (82) and the first rubber sealing sleeve (83) are located in the variable stiffness spring (91) and the sleeve hole (93), and gaps exist between the movable rod (82) and the first rubber sealing sleeve (83) and the inner wall surface of the variable stiffness spring (91) and the inner wall surface of the sleeve hole (93).

8. A screw air compressor inlet valve according to claim 6, wherein: The left end surface of the connecting block (92) is always in contact with the right end surface of the circular valve core (85).

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