Gas safety protection valve

Abstract

The utility model relates to a fuel gas safety protection valve which comprises a valve body shell, a shaft rod and a circular plugging valve plate, the shaft rod is rotationally installed in a cavity channel of the valve body shell, one end of the shaft rod penetrates and extends to the outside of the valve body shell, the circular plugging valve plate matched with the cavity channel in shape is fixed to the shaft rod, and a miniature electric push cylinder is fixed to the outer side surface of the valve body shell. A connecting arm is fixed to the end of a telescopic rod of the micro electric push cylinder, a rack is fixed to the end of the connecting arm, a gear is fixed to the outer end of the shaft rod, and the gear is correspondingly meshed with the rack. The miniature electric push cylinder stretches out and draws back to drive the rack to be meshed with the driving gear to rotate so as to drive the round blocking valve plate to conduct rotary opening and closing regulation and control, and the opening and closing angle of the round blocking valve plate can be effectively controlled by means of the stretching stroke of the miniature electric push cylinder, and when the miniature electric push cylinder stretches out and draws back to the limit state, the miniature electric push cylinder can stretch out and draw back. Therefore, the circular plugging valve plate is synchronously opened and closed to a limit position, and the opening and closing amount of the circular plugging valve plate can be accurately controlled.

Description

TECHNICAL FIELD

[0001] The utility model relates to gas valve technical field especially relates to a gas safety protection valve. BACKGROUND

[0002] Referring to the authorized announcement No. CN220706430U of Chinese patent, it discloses a reliable protection gas safety valve, including valve body shell and automatic plugging device, the outer wall of valve body shell is equipped with plugging device body base. The reliable protection gas safety valve, through setting internal gas detector in the inside of equipment, makes equipment can independently detect the gas in the inside of pipeline, and when the gas content reaches certain value, internal gas detector will emit control signal to automatic plugging device, so that rotary drive motor can control motor drive shaft to drive internal plugging block to rotate, so as to control internal plugging block to block the inside of pipeline, can also make internal plugging block can restore to original position through the torsion effect of torsion spring, and limiting stopper can block internal plugging block, so that equipment can independently control internal plugging block to close pipeline.

[0003] The plugging block in the safety valve disclosed in the above patent restores to the original position by relying on the elastic restoring force of the torsion spring, so that the plugging block cancels the blocking of the pipeline, however, with the passage of time and the increase of the number of uses, the elasticity of the torsion spring will gradually decrease, resulting in a decrease in the restoring force, and there is a case that the plugging block cannot be accurately returned to the initial position, thereby affecting the normal function of the safety valve. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a kind of gas safety protection valve, effectively solve the problem raised in the above background.

[0005] To achieve the above object, the utility model provides the following technical scheme.

[0006] A kind of gas safety protection valve, including valve body shell, shaft and circular plugging valve piece, shaft rotation is installed in the cavity of valve body shell, and one end extends to the outside of valve body shell, shaft is fixed with the circular plugging valve piece of shape and cavity adaptation, micro electric push cylinder is fixed on the outside surface of valve body shell, connecting arm is fixed on the end of the telescopic rod of micro electric push cylinder, rack is fixed on the end of connecting arm, gear is fixed on the outer end of shaft, gear and rack are engaged, rack and micro electric push cylinder are respectively on the two sides of gear.

[0007] Therefore, the rotation of the circular blocking valve piece is driven by the extension and retraction of the micro electric push cylinder, the opening and closing angle of the circular blocking valve piece can be effectively controlled by the extension and retraction stroke of the micro electric push cylinder, when the micro electric push cylinder is extended to the limit state, the circular blocking valve piece is opened and closed to the limit position synchronously, so that the opening and closing amount of the circular blocking valve piece can be accurately controlled, in addition, the micro electric push cylinder and the rack are arranged on both sides of the gear, and the extension rod end of the micro electric push cylinder is connected with the rack by the connecting arm, so that the synchronous movement of the rack and the extension rod of the micro electric push cylinder is realized, compared with the linear connection mode of arranging the micro electric push cylinder and the rack on the same side, the connection mode of the gas safety protection valve can shorten the extension length of the overall arrangement of the rack and the micro electric push cylinder, which is beneficial to the miniaturization of the valve body area, the overall structure layout is reasonable, and the practicability is high.

[0008] Further, the valve body shell is provided with two insertion grooves symmetrically arranged on both sides of the circular blocking valve piece, and two internal gas detectors are sealingly inserted into the two insertion grooves.

[0009] Further, a micro controller is mounted on the outer surface of the valve body shell, and the micro controller is electrically connected with the micro electric push cylinder and the two internal gas detectors.

[0010] The detection part of the internal gas detector can autonomously collect and monitor the gas amount in the cavity, and transmit the collected data to the micro controller, when the monitored gas content reaches a certain value, the micro electric push cylinder is controlled by the micro controller to retract, so as to adjust the circular blocking valve piece to the closed state, which effectively prevents gas leakage.

[0011] Further, a frame-shaped shell is fixed on the outer surface of the valve body shell and surrounds the gear, the micro electric push cylinder, the rack and the micro controller, and a cover plate is detachably mounted on the top of the frame-shaped shell by screws.

[0012] The frame-shaped shell and the cover plate are arranged on the side of the valve body shell, and the frame-shaped shell and the cover plate form a protection shell which covers the outside of the gear, the micro electric push cylinder, the rack and the micro controller, providing protection effect, preventing the micro electric push cylinder and the micro controller from being damaged by bumping, preventing external objects from contacting and jamming the gear and the rack and affecting the normal meshing drive, in addition, the cover plate can be mounted on the frame-shaped shell by screws, so that the cover plate has detachable effect, thereby facilitating the maintenance of the micro electric push cylinder and the micro controller.

[0013] Further, a U-shaped guide seat is fixed on the outer surface of the valve body shell, and the rack is limitingly and slidingly installed on the U-shaped guide seat.

[0014] Further, the valve body shell has two connecting ports on both sides, which are communicated with the cavity, and the two connecting ports and the cavity form a channel for the gas flow.

[0015] Compared with the prior art, the utility model has the advantages as follows.

[0016] 1. The utility model discloses a micro electric push cylinder's telescopic work drives the rack meshing drive gear rotation mode to drive the rotation of the circular plugging valve piece, and the telescopic stroke of the micro electric push cylinder can effectively control the opening angle of the circular plugging valve piece, when the micro electric push cylinder telescopes to the limit state, the circular plugging valve piece opens and closes to the limit position synchronously, guaranteeing that the opening and closing amount of the circular plugging valve piece can be accurately controlled.

[0017] 2. The utility model discloses a micro electric push cylinder and rack are arranged at the both sides of the gear, and utilize the connecting arm and connect the telescopic rod end of micro electric push cylinder with the rack, realize the synchronous movement of rack and micro electric push cylinder telescopic rod, relative to the linear connection mode of micro electric push cylinder and rack arranged at the same side, the connection mode of the utility model discloses a gas safety protection valve can shorten the extension length of the overall arrangement of rack and micro electric push cylinder, is favorable to the miniaturization of valve body area, facilitates the installation, and the overall structure layout is reasonable, and the practicality is high. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the whole structure stereogram of the utility model;

[0019] Figure 2 It is one of the utility model cross section structure schematic drawing;

[0020] Figure 3 It is the second of the utility model cross section structure schematic drawing;

[0021] Figure 4 It is the valve body shell surface local structure schematic drawing in the utility model.

[0022] In the drawing: 1, valve body shell;101, frame shell;102, cover plate;11, cavity;12, connecting port;2, shaft;3, circular plugging valve piece;4, gear;5, micro electric push cylinder;6, connecting arm;7, rack;71, U-shaped guide base;8, internal gas detector;81, plug-in slot;9, microcontroller. PREFERRED EMBODIMENT

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0024] Please refer to Figures 1-4 The utility model provides a kind of gas safety protection valve, including valve body shell 1, shaft 2 and circular plugging valve piece 3, valve body shell 1 has the through cavity 11 of two ends, valve body shell 1 both sides have the connecting port 12 all with the through cavity 11, two connecting ports 12 are convenient to be connected with gas delivery pipeline respectively with both ends of valve body, two connecting ports 12 and the through cavity 11 form the passage for gas to flow.

[0025] Shaft 2 is rotatably installed in the through cavity 11 of valve body shell 1, and one end extends to the outside of valve body shell 1, circular plugging valve piece 3 of the shape that is adapted to the through cavity 11 is fixed on shaft 2, micro electric push cylinder 5 is fixed on the outside surface of valve body shell 1, connecting arm 6 is fixed on the end of the telescopic rod of micro electric push cylinder 5, rack 7 is fixed on the end of connecting arm 6, gear 4 is fixed on the outer end of shaft 2, gear 4 is engaged with rack 7,

[0026] Through the extension work of micro electric push cylinder 5, the telescopic rod is connected under the action of connecting arm 6 to drive rack 7 synchronous movement, drive gear 4 by engaging with rack 7 and drive shaft 2 to rotate, so that circular plugging valve piece 3 can be driven to rotate and open, to facilitate gas flow, through the retraction work of micro electric push cylinder 5, the telescopic rod is connected under the action of connecting arm 6 to drive rack 7 synchronous movement, drive gear 4 by engaging with rack 7 and drive shaft 2 to rotate, so that circular plugging valve piece 3 can be driven to rotate and close, realize the plugging of the through cavity 11, avoid gas to continue to flow.

[0027] When micro electric push cylinder 5 extends to the limit position, circular plugging valve piece 3 is in completely open state, at this time, the cross section size of the through cavity 11 for gas flow on both sides of circular plugging valve piece 3 is consistent, when micro electric push cylinder 5 retracts to the limit position, at this time, circular plugging valve piece 3 is in completely closed state, the through cavity 11 can be effectively plugged.

[0028] The utility model drives circular plugging valve piece 3 to rotate by the mode that the telescopic work of micro electric push cylinder 5 drives rack 7 to engage and drive gear 4 to rotate, the opening angle of circular plugging valve piece 3 can be effectively controlled by the telescopic stroke of micro electric push cylinder 5, when micro electric push cylinder 5 telescopes to the limit state, circular plugging valve piece 3 is opened and closed to the limit position synchronously, ensure that the opening and closing amount of circular plugging valve piece 3 can be accurately controlled.

[0029] In addition, the rack 7 and the micro electric push cylinder 5 are arranged on both sides of the gear 4, the synchronous movement of the rack 7 and the micro electric push cylinder 5 is realized by arranging the micro electric push cylinder 5 and the rack 7 on both sides of the gear 4 and connecting the telescopic rod end of the micro electric push cylinder 5 and the rack 7 by the connecting arm 6, compared with the connecting mode of arranging the micro electric push cylinder 5 and the rack 7 on the same side in a straight line, the connecting mode of the gas safety protection valve can shorten the extension length of the overall arrangement of the rack 7 and the micro electric push cylinder 5, which is beneficial to the miniaturization of the valve body region.

[0030] Specifically, the valve body shell 1 is symmetrically arranged with plug-in grooves 81 on both sides of the circular sealing valve plate 3, and the two plug-in grooves 81 are both sealed and plugged with internal gas detectors 8, and the detection parts of the two internal gas detectors 8 both extend into the cavity 11.

[0031] The valve body shell 1 is installed with a micro controller 9 on the outer surface, the micro controller 9 is electrically connected between the micro electric push cylinder 5, and the micro controller 9 is electrically connected between the two internal gas detectors 8.

[0032] The detection part of the internal gas detector 8 can autonomously collect and monitor the gas amount in the cavity 11, and transmit the collected data to the micro controller 9, when the monitored gas content reaches a certain value, the micro controller 9 controls the micro electric push cylinder 5 to retract, so as to adjust the circular sealing valve plate 3 to the closed state, effectively preventing gas leakage.

[0033] It is worth mentioning that the control mode of the present application is automatically controlled by the micro controller 9, the power supply mode adopts the existing technology, the control program of the micro controller 9 can be realized by simple programming of the technical personnel in the field, which belongs to the common knowledge in the field, so the control mode and circuit connection will not be explained in detail.

[0034] Specifically, the outer surface of the valve body shell 1 is fixed with a frame-shaped shell 101 which surrounds the gear 4, the micro electric push cylinder 5, the rack 7 and the micro controller 9, and the top of the frame-shaped shell 101 is detachably installed with a cover plate 102, the frame-shaped shell 101 and the cover plate 102 are arranged on the side of the valve body shell 1, and the frame-shaped shell 101 and the cover plate 102 form a protective shell which covers the outside of the gear 4, the micro electric push cylinder 5, the rack 7 and the micro controller 9, providing a protection effect, preventing the micro electric push cylinder 5 and the micro controller 9 from being damaged by bumping, and preventing external objects from contacting and jamming the gear 4 and the rack 7 to affect the normal meshing drive.

[0035] In addition, the cover plate 102 can be installed on the frame-shaped shell 101 by screws, so that the cover plate 102 has a detachable effect, thereby facilitating the maintenance and repair of the micro electric push cylinder 5 and the micro controller 9.

[0036] Specifically, a U-shaped guide base 71 is fixed on the outer surface of the valve body shell 1, and the rack 7 is slidingly installed in the U-shaped guide base 71, the U-shaped guide base 71 provides a limiting guide and a supporting effect for the rack 7, and ensures that the movement of the rack 7 is smooth and stable enough.

[0037] The above is a detailed description of the utility model in combination with specific examples, and the specific implementation of the utility model cannot be limited to these descriptions. For ordinary skilled persons in the technical field to which the utility model belongs, without departing from the concept of the utility model, a number of equivalent substitutions or obvious modifications can be made, and the performance or use is the same, which should be regarded as belonging to the patent protection range determined by the submitted claims of the utility model.

Claims

1. A gas safety protection valve, comprising a valve body shell (1), a shaft rod (2) and a circular sealing valve piece (3), characterized in that: the shaft rod (2) is rotatably installed in a cavity (11) of the valve body shell (1) and extends through one end to the outside of the valve body shell (1); the shaft rod (2) is fixed with the circular sealing valve piece (3) which is shaped to fit the cavity (11); a micro electric push cylinder (5) is fixed on the outer surface of the valve body shell (1), the end of the telescopic rod of the micro electric push cylinder (5) is fixed with a connecting arm (6), the end of the connecting arm (6) is fixed with a rack (7); a gear (4) is fixed on the outer end of the shaft rod (2) and engages with the rack (7); the rack (7) and the micro electric push cylinder (5) are respectively on both sides of the gear (4).

2. The gas safety protection valve according to claim 1, characterized in that: two plug-in grooves (81) are symmetrically arranged on the valve body shell (1) on both sides of the circular sealing valve piece (3), and two internal gas detectors (8) are respectively and sealingly plugged into the two plug-in grooves (81); the detection parts of the two internal gas detectors (8) extend into the cavity (11).

3. The gas safety protection valve according to claim 2, characterized in that: a micro controller (9) is installed on the outer surface of the valve body shell (1), the micro controller (9) is electrically connected with the micro electric push cylinder (5), and the micro controller (9) is electrically connected with the two internal gas detectors (8).

4. The gas safety protection valve according to claim 3, characterized in that: a frame-shaped shell (101) is fixed on the outer surface of the valve body shell (1) and surrounds the gear (4), the micro electric push cylinder (5), the rack (7) and the micro controller (9), and a cover plate (102) is detachably installed on the top of the frame-shaped shell (101) by screws.

5. The gas safety protection valve according to claim 1, characterized in that: a U-shaped guide base (71) is fixed on the outer surface of the valve body shell (1), and the rack (7) is limitingly and slidingly installed in the U-shaped guide base (71).

6. The gas safety protection valve according to claim 1, characterized in that: the valve body shell (1) has two connecting ports (12) on both sides which are communicated with the cavity (11), and the two connecting ports (12) and the cavity (11) form a channel for gas flow. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

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