A self-locking pneumatic valve

Abstract

This utility model relates to the field of valve technology, and in particular to a self-locking pneumatic valve, comprising a valve part, the valve part including a valve shell, a valve seat fixedly connected to the inner side of the valve shell in a horizontally arranged manner, a valve core disposed on the upper side of the valve seat on the inner side of the valve shell, a pair of support bars of different lengths fixedly connected to the upper side of the valve shell, a pneumatic actuator fixedly connected to the upper side of the support bars, the pneumatic actuator including a housing, a connector communicating with the upper side of the housing, a diaphragm fixedly connected to the inner side of the housing, a pad fixedly connected to the lower side of the diaphragm, and a valve stem passing through the housing fixedly connected to the lower end of the pad. In this utility model, the self-locking function of the self-locking pneumatic valve, through the structure of the pneumatic actuator, valve part, drive part, locking block and locking bar, enables the valve core to maintain its original position when the air source is interrupted or the power is cut off, and eliminates the energy waste caused by maintaining the valve position.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically to a self-locking pneumatic valve. Background Technology

[0002] A pneumatic valve is an automated control device that uses compressed air as a power source and drives the valve core to move through a pneumatic actuator, thereby realizing the opening and closing of pipeline media or the regulation of flow. Its core advantages are fast response speed, large driving force, and simple maintenance. It is widely used in petroleum, chemical, power, pharmaceutical and other industrial fields.

[0003] Existing pneumatic valves generally adopt a single-acting spring reset design, which lacks a reliable self-locking mechanism. This causes the valve core to fail to maintain its original position when the air supply is interrupted or the power is cut off, which can easily lead to uncontrolled leakage of the medium inside the valve. At the same time, continuous air supply to maintain the valve position will result in energy waste. Therefore, a self-locking pneumatic valve is proposed to address the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a self-locking pneumatic valve to solve the problems of valve malfunction when the air supply is interrupted due to the lack of a self-locking mechanism in traditional pneumatic valves, as well as the energy waste caused by maintaining the valve position.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A self-locking pneumatic valve includes a valve part comprising a valve housing. A horizontally aligned valve seat is fixedly connected to the inner side of the valve housing. A valve core is disposed on the inner side of the valve housing above the valve seat. A pair of support bars of different lengths are fixedly connected to the upper side of the valve housing. A pneumatic actuator is fixedly connected to the upper side of the support bars. The pneumatic actuator includes a housing with a connector communicating with its upper side. A diaphragm is fixedly connected to the inner side of the housing. A pad is fixedly connected to the lower side of the diaphragm. A valve stem passing through the housing is fixedly connected to the lower end of the pad, and the lower end of the valve stem passes through an upper hole in the valve housing and is fixedly connected to the valve core. A plurality of return springs are fixedly connected between the lower end face of the pad and the lower inner wall of the housing. A drive unit is mounted on the left end face of the left support bar. The drive unit includes components that interact with the support bars. The outer shell is fixedly connected to a valve stem. A horizontally arranged rail rod runs through the inner side of the outer shell. A locking block is fixedly connected to the right end of the rail rod through the left side support bar. A locking bar that engages with the locking block is fixedly connected to the left side of the valve stem. A guide block located inside the outer shell is fixedly connected to the outer side of the rail rod. A return spring is sleeved on the outer side of the rail rod between the left end face of the guide block and the left inner wall of the outer shell. A connecting pipe is connected to the lower side of the outer shell. A washer is fixedly connected to the inner side of the connecting pipe. A guide sleeve is installed on the upper side of the washer. A channel is opened on the inner side of the guide sleeve. Several exhaust holes are opened on the outer side of the channel at equal angles. A return air passage is opened on the upper side of the channel. A one-way valve is fixedly connected to the inner side of the return air passage. A connecting pipe is connected to the upper side of the outer shell. The lower right end of the connecting pipe is connected to a connector.

[0007] Preferably, a linkage block is fixedly connected to the left end of the rail rod, and an electric push rod is provided on the right side of the linkage block, and the electric push rod is fixedly connected to the left end face of the housing.

[0008] Preferably, the guide block is a tapered block structure that is wider on the left and narrower on the right, the upper edge of the guide sleeve is provided with a tapered chamfer, the tapered inclined surface of the guide sleeve is in contact with the tapered inclined surface of the guide block, and a gap is provided between the guide sleeve and the rail rod.

[0009] Preferably, the diameter of the guide sleeve is the same as the inner diameter of the connecting pipe, the outer curved surface of the guide sleeve fits into the inner curved surface of the connecting pipe, and the vent holes are all located on the inner side of the connecting pipe.

[0010] Preferably, the one-way valve is configured for flow from top to bottom, the rail rod is a square rod structure, and the rail rod and the rail housing are slidably connected.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] In this invention, the pneumatic actuator, valve section, drive section, locking block, and locking bar are designed to drive the valve core of the valve section, thereby controlling the opening and closing of the valve. The drive section can drive the locking block to lock the locking bar fixed on the valve stem, thus locking the valve tube and valve core. This achieves the self-locking function of the self-locking pneumatic valve, allowing the valve core to maintain its original position when the air supply is interrupted or the power is cut off. It also eliminates the energy waste caused by maintaining the valve position, solving the problems of valve loss of control when the air supply is interrupted due to the lack of a self-locking mechanism in traditional pneumatic valves, as well as the energy waste caused by maintaining the valve position. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This utility model Figure 1 A schematic diagram of the structure viewed from below;

[0015] Figure 3 This utility model Figure 1 A schematic diagram of the cross-sectional structure;

[0016] Figure 4 This is a cross-sectional view of the pneumatic actuator of this utility model;

[0017] Figure 5 This is a cross-sectional structural diagram of the drive unit of this utility model;

[0018] Figure 6 This is a cross-sectional view of the guide sleeve of this utility model;

[0019] Figure 7 This is a schematic diagram showing the disassembled structure of the lock block and lock bar of this utility model.

[0020] In the diagram: 1. Valve section; 11. Valve body; 12. Valve seat; 13. Valve core; 2. Support bar; 3. Pneumatic actuator; 31. Housing; 32. Connector; 33. Diaphragm; 34. Gasket; 35. Valve stem; 36. Return spring one; 4. Drive section; 401. Housing; 402. Rail; 403. Guide block; 404. Return spring two; 405. Link block; 406. Electric push rod; 407. Connecting pipe; 408. Washer ring; 409. Guide sleeve; 410. Channel; 411. Air return channel; 412. Exhaust port; 413. Check valve; 5. Through pipe; 6. Locking block; 7. Locking bar. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0023] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0024] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0025] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0026] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0027] Please see Figure 1-7 This utility model provides a technical solution:

[0028] A self-locking pneumatic valve includes a valve part 1, which includes a valve housing 11. A horizontally arranged valve seat 12 is fixedly connected to the inner side of the valve housing 11. A valve core 13 is disposed on the inner side of the valve housing 11 above the valve seat 12. A pair of support bars 2 of different lengths are fixedly connected to the upper side of the valve housing 11. A pneumatic actuator 3 is fixedly connected to the upper side of the support bars 2. The pneumatic actuator 3 includes a housing 31. A connector 32 is connected to the upper side of the housing 31. The inner side of the housing 31 is fixed with... A diaphragm 33 is connected, and a pad 34 is fixedly connected to the lower side of the diaphragm 33. A valve stem 35 passing through the housing 31 is fixedly connected to the lower end of the pad 34, and the lower end of the valve stem 35 passes through the upper hole of the valve housing 11 and is fixedly connected to the valve core 13. Several return springs 36 are fixedly connected between the lower end face of the pad 34 and the lower inner wall of the housing 31. A drive unit 4 is installed on the left end face of the left support bar 2. The drive unit 4 includes a housing 401 fixedly connected to the support bar 2. A horizontally aligned rail 402 runs through the inner side of the outer casing 401. A locking block 6 is fixedly connected to the right end of the rail 402, passing through the left support bar 2. A locking bar 7, engaging with the locking block 6, is fixedly connected to the left side of the valve stem 35. A guide block 403, located inside the outer casing 401, is fixedly connected to the outer side of the rail 402. A return spring 404, sleeved on the outer side of the rail 402, is positioned between the left end face of the guide block 403 and the left inner wall of the outer casing 401. A connecting pipe 4 is connected to the lower side of the outer casing 401. 07. A gasket 408 is fixedly connected to the inner side of the pipe 407. A guide sleeve 409 is installed on the upper side of the gasket 408. A channel 410 is opened on the inner side of the guide sleeve 409. Several exhaust holes 412 arranged at equal angles are opened on the outer side of the channel 410. A return air passage 411 is opened on the upper side of the channel 410. A one-way valve 413 is fixedly connected to the inner side of the return air passage 411. A through pipe 5 is connected to the upper side of the outer shell 401. The lower right end of the through pipe 5 is connected to the connector 32.

[0029] A linkage block 405 is fixedly connected to the left end of the rail rod 402. An electric push rod 406 is provided on the right side of the linkage block 405, and the electric push rod 406 is fixedly connected to the left end face of the housing 401. This arrangement allows the linkage block 405, rail rod 402, and locking block 6 to be pushed to the left and reset. The guide block 403 is a tapered block structure that is wider on the left and narrower on the right. The upper edge of the guide sleeve 409 is tapered and chamfered. The tapered slope of the guide sleeve 409 fits against the tapered slope of the guide block 403. This arrangement allows the guide block 403 to be moved to the left when the guide sleeve 409 moves upward. A gap is provided between the guide sleeve 409 and the rail rod 402. This arrangement allows the guide sleeve 409 to move to the left. 09 can be displaced upwards; the diameter of the guide sleeve 409 is the same as the inner diameter of the connecting pipe 407, and the outer curved surface of the guide sleeve 409 fits with the inner curved surface of the connecting pipe 407. The exhaust holes 412 are all located inside the connecting pipe 407. This setting can prevent the exhaust holes 412 from venting inside the connecting pipe 407, so that the exhaust holes 412 can only vent inside the outer shell 401; the one-way valve 413 is designed to flow from top to bottom. This setting can vent the gas inside the pneumatic actuator 3. The rail rod 402 is a square rod structure, and the rail rod 402 is slidably connected to the rail shell. This setting can only move horizontally and cannot rotate.

[0030] Workflow: The operation of the self-locking pneumatic valve is as follows: 1. The electric actuator 406 is externally powered and controlled by an external controller; 2. The external air supply system must be connected to the connecting pipe 407 of this application; Under normal conditions, valve section 1 of the self-locking pneumatic valve is in the open state. When valve section 1 needs to be closed, compressed air must be supplied to the connecting pipe 407 through the external air supply system. After the airflow enters the connecting pipe 407, it pushes the guide sleeve 409 upward. The upward movement of the guide sleeve 409 compresses and forces the guide block 403 and the rail rod 402 to move to the left. The leftward movement of the rail rod 402 causes the locking block 6 to disengage from the locking bar 7, releasing the lock on the valve stem 35 and the valve core 13, allowing the valve stem 35 to move downward; simultaneously... The upward movement of the guide sleeve 409 causes the exhaust port 412 to detach from the connecting pipe 407 and be exposed inside the housing 401. The gas inside the guide sleeve 409 is discharged into the housing 401 through the exhaust port 412, and then enters the housing 31 of the pneumatic actuator 3 through the connecting pipe 5 and the connector 32, that is, above the diaphragm 33. As the gas pressure increases, the diaphragm 33 is deformed under pressure and pushes the pad 34, valve stem 35, locking bar 7 and valve core 13 to move downward as a whole. The valve core 13 finally fits tightly against the valve seat 12 to close the valve part 1. At this time, the gas source can be cut off. After the guide sleeve 409 loses the gas pressure, it falls downward. The return spring 404 elastically returns to its original position and pushes the guide block 403, the rail 402 and the locking block 6 to move to the right, so that the locking block 6 is reinserted. The locking bar 7 is restored to its original position, thus maintaining the stable position of the valve core 13 even without a continuous air supply, achieving reliable self-locking of the valve section 1. (During the air cut-off process, the return spring 36 will also drive the locking bar 7, valve stem 35, and valve core 13 to move slightly upward until locked by the locking block 6. However, since the valve core 13 is fully inserted into the valve seat 12 through the above actions and is relatively long, the slight upward movement of the valve core 13 will not disengage from the valve seat 12, and therefore will not affect the closed state of the valve section 1). When it is necessary to reopen the valve section 1, the external controller drives the electric push rod 406 to perform a telescopic action. The extension action pushes the linkage block 405, the rail rod 402, and the locking block 6 to move to the left to release the lock. At this time, the return spring 36... The elastic reset pushes the pad 34, valve stem 35, valve core 13 and locking bar 7 upward as a whole, the valve core 13 separates from the valve seat 12 to complete the opening of the valve part 1, at the same time the diaphragm 33 restores its deformation and pushes the gas in the housing 31 back to the housing 401 through the connector 32 and the through pipe 5, and finally discharges to the air source system through the one-way valve 413 and the return air passage 411 and the connecting pipe 407; after the electric push rod 406 retracts, the reset spring 36 pushes the locking block 6 to the right to re-insert the locking bar 7, and restores the initial locking state. This design realizes the self-locking function of the self-locking pneumatic valve through the synergistic effect of mechanical self-locking and pneumatic drive, so that the valve core 13 maintains its original position when the air source is interrupted or the power is cut off, and avoids the energy waste caused by maintaining the valve position.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A self-locking pneumatic valve comprising a valve part (1), characterized in that: The valve part (1) includes a valve shell (11), a valve seat (12) arranged horizontally is fixedly connected to the inner side of the valve shell (11), a valve core (13) is provided on the inner side of the valve shell (11) above the valve seat (12), a pair of support bars (2) of different lengths are fixedly connected to the upper side of the valve shell (11), a pneumatic actuator (3) is fixedly connected to the upper side of the support bars (2), the pneumatic actuator (3) includes a housing (31), a connector (32) is connected to the upper side of the housing (31), and a diaphragm (33) is fixedly connected to the inner side of the housing (31). A pad (34) is fixedly connected to the lower side of the diaphragm (33). A valve stem (35) passing through the housing (31) is fixedly connected to the lower end of the pad (34). The lower end of the valve stem (35) passes through the upper hole of the valve housing (11) and is fixedly connected to the valve core (13). A plurality of return springs (36) are fixedly connected between the lower end face of the pad (34) and the lower inner wall of the housing (31). A drive unit (4) is installed on the left end face of the left support bar (2). The drive unit (4) includes a housing (401) fixedly connected to the support bar (2). The inner side of the housing (401) A horizontally arranged rail rod (402) runs through the valve stem (35). A locking block (6) is fixedly connected to the right end of the rail rod (402) through the left side support bar (2). A locking bar (7) that meshes with the locking block (6) is fixedly connected to the left side of the valve stem (35). A guide block (403) located inside the outer shell (401) is fixedly connected to the outer side of the rail rod (402). A return spring (404) sleeved on the outer side of the rail rod (402) is provided between the left end face of the guide block (403) and the left inner wall of the outer shell (401). A connecting pipe (407) is connected to the lower side of the outer shell (401). A gasket (408) is fixedly connected to the inner side of the connector (407). A guide sleeve (409) is installed on the upper side of the gasket (408). A channel (410) is opened on the inner side of the guide sleeve (409). Several exhaust holes (412) are opened on the outer side of the channel (410) at equal angles. A return air passage (411) is opened on the upper side of the channel (410). A one-way valve (413) is fixedly connected to the inner side of the return air passage (411). A through pipe (5) is connected to the upper side of the outer shell (401). The lower right end of the through pipe (5) is connected to the connector (32).

2. A self-locking pneumatic valve according to claim 1, characterized in that: A linkage block (405) is fixedly connected to the left end of the rail (402), and an electric push rod (406) is provided on the right side of the linkage block (405), and the electric push rod (406) is fixedly connected to the left end face of the outer shell (401).

3. A self-locking pneumatic valve according to claim 1, characterized in that: The guide block (403) is a tapered block structure that is wider on the left and narrower on the right. The upper edge of the guide sleeve (409) is set with a tapered chamfer. The tapered slope of the guide sleeve (409) fits into the tapered slope of the guide block (403). There is a gap between the guide sleeve (409) and the rail rod (402).

4. The self-locking pneumatic valve according to claim 1, characterized in that: The diameter of the guide sleeve (409) is the same as the inner diameter of the connecting pipe (407). The outer curved surface of the guide sleeve (409) fits into the inner curved surface of the connecting pipe (407). The exhaust holes (412) are all located on the inner side of the connecting pipe (407).

5. The self-locking pneumatic valve according to claim 1, wherein: The one-way valve (413) is configured to allow flow from top to bottom, the rail rod (402) is a square rod structure, and the rail rod (402) is slidably connected to the rail housing.

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