CN108533827A - A kind of initial signal feedback device for having pressure energy self-locking and energy hand-reset - Google Patents

Abstract

The invention discloses a kind of initial signal feedback devices for having pressure energy self-locking and energy hand-reset, it include the valve body being made of case and valve seat, there is valve chamber in valve body, seat bottom portion is equipped with air admission hole, case top is equipped with pilot hole, piston rod is slidably connected in valve chamber, piston-rod lower end has piston head, piston rod is equipped with baffle ring, elastic element one is equipped between baffle ring and piston head, piston rod upper end is connected with mandril, case is equipped with switch fixed seat, switching has rolling groove in fixed seat, rolling groove side is equipped with microswitch, the other side has wide-mouth slot, being sticked on wide-mouth slot has ball, elastic element two is equipped between ball and microswitch.The present invention can use under conditions of primary condition is to have pressure, after pressure medium release or when pressure medium is less than to a certain degree, in the case that not by external force, energy constant feedback signal, that is, self-locking requirement, it can be made no longer to export feedback signal after manual reset, be used for next time.

Description

A signal feedback device that can be self-locked with initial pressure and can be manually reset

technical field

The present invention relates to a signal feedback device, more specifically, it relates to a signal feedback device which is self-locking initially with pressure energy and can be manually reset.

Background technique

In the automatic fire extinguishing system, the signal feedback device is a component that feeds back the signal of the normal start of the system to the control of the fire extinguishing device. Article 5.15 of GB25972-2010 "Gas Fire Extinguishing System and Components" stipulates that the signal feedback device in the gas fire extinguishing system should have a self-locking function, and can only be reset manually after the action.

At present, the structure of the known signal feedback device is composed of a valve body, a piston, a micro switch, a casing, a line pipe connecting sleeve and the like. The principle is that when the medium with a certain pressure enters the valve body, the piston is pushed to make the micro switch act, so that the medium release signal is fed back to the controller. However, the initial condition when most signal feedback devices are used is a no-pressure state, that is, when a certain pressure is reached into the valve body, it can be activated and output a feedback signal. There are also some signal feedback devices whose initial condition is a pressurized state, but self-locking and manual reset cannot be realized.

Accordingly, the present invention proposes a signal feedback device that is self-locking with initial pressure and can be manually reset.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies in the above-mentioned prior art, and provide a signal feedback device that can be self-locked and manually reset when the initial condition is pressurized. A signal feedback device that needs to be manually reset later.

In order to solve the above-mentioned technical problems, the purpose of the present invention is achieved in the following way: a signal feedback device with initial pressure energy self-locking and manual reset that the present invention involves includes a valve body composed of a casing and a valve seat, and the valve There is a valve cavity in the body, the bottom of the valve seat is provided with an air inlet hole leading to the valve cavity, the top of the cover is provided with a guide hole, the valve cavity is slidably connected to a piston rod, and the lower end of the piston rod has a piston head. The piston rod is covered with a retaining ring embedded in the valve cavity, and an elastic element is arranged between the retaining ring and the piston head. The upper end surface of the rod protrudes from the upper end surface of the cover; the side wall of the cover is connected with a switch fixing seat, and the switch fixing seat has a rolling groove communicating with the valve cavity, and one side of the rolling groove is provided with The micro switch fixed on the switch fixing seat has a wide-mouthed groove on the side wall of the ejector rod on the other side, and the lower groove wall of the wide-mouthed groove is attached with a rolling connection in the rolling groove. A ball, an elastic element 2 is provided between the ball and the micro switch; a side hole is also opened on the side wall of the cover, and a self-locking unit that can move left and right is embedded in the side hole, and one end of the self-locking unit touches the ejector rod The lower end surface, and the other end protrudes from the outer wall surface of the casing.

The present invention is further configured as follows: the casing is sheathed and rotatably connected to the valve seat, a screw mounting hole is opened on the side wall of the casing, and the screw mounting hole is internally threaded to limit the rotation of the casing. set screw one.

By adopting the above technical scheme, the casing and the valve seat can be rotated at any angle of 360 degrees to adjust the direction, and the casing is limited by the limit screw set on the casing.

The present invention is further provided that: the side hole has an internal thread, and the self-locking unit is a stop screw 2 threaded on the side hole.

By adopting the above-mentioned technical scheme, the movement of the ejector rod is limited by using the screw thread to control the length of the stop screw 2 entering the casing, or it can be replaced with other forms to control the length of the stop pin entering the casing.

The present invention is further set as: the lower groove wall of the wide-mouth groove forms an included angle of 30 degrees with the vertical plane.

By adopting the above-mentioned technical scheme, the rolling of the balls is facilitated, and the inclination angle of the lower groove wall of the wide-mouth groove can be set according to requirements. Generally, when 30 degrees is selected, the balls are easy to roll and the rolling effect is the best.

The present invention is further provided that: the side of the piston head is provided with an annular groove, and an O-ring is embedded in the annular groove.

By adopting the above technical solution, the airtightness between the piston head and the valve chamber is increased to prevent medium leakage.

The present invention is further provided that: both the first elastic element and the second elastic element are compression springs.

To sum up, the present invention has the following beneficial effects: the signal feedback device that can be self-locked and manually reset when initially under pressure can be used when the initial condition is pressurized, after the medium pressure is released or When the medium pressure is lower than a certain level, without the help of external force, it can continue to feed back the signal, that is, the self-locking requirement. After manual reset, it can no longer output the feedback signal for the next use.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the structural representation that the present invention is not in self-locking state;

Explanation of reference signs: 1. Cover; 2. Valve seat; 3. Valve body; 4. Valve chamber; 5. Air intake hole; 6. Guide hole; 7. Piston rod; 71. Piston head; ;9, elastic element one; 10, ejector rod; 11, switch holder; 12, rolling groove; 13, micro switch; 14, wide mouth groove; 15, ball; 16, elastic element two; 17, side hole; 18. Self-locking unit; 19. Screw mounting hole; 20. One limit screw; 21. Annular groove; 22. O-ring.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and preferred embodiments.

Referring to Figures 1 to 2, a signal feedback device with initial pressure energy self-locking and manual reset involved in this embodiment includes a valve body 3 composed of a casing 1 and a valve seat 2, inside the valve body 3 There is a valve cavity 4, the bottom of the valve seat 2 is provided with an air inlet 5 communicating with the valve cavity 4, the top of the casing 1 is provided with a guide hole 6, and the valve cavity 4 is slidably connected with a piston rod 7, The lower end of the piston rod 7 has a piston head 71, the piston rod 7 is sleeved with a stop ring 8 embedded in the valve cavity 4, an elastic element 9 is arranged between the stop ring 8 and the piston head 71, and the piston rod 7 The upper end is also fixedly connected with a push rod 10 slidingly connected in the guide hole 6, and the upper end surface of the push rod 10 protrudes from the upper end surface of the casing 1; the side wall surface of the casing 1 is connected with a switch fixing seat 11 The switch fixing seat 11 has a rolling groove 12 communicating with the valve chamber 4, one side of the rolling groove 12 is provided with a micro switch 13 fixedly connected to the switch fixing seat 11, and the other side has a micro switch 13 set on the push rod. 10 the wide-mouth groove 14 on the side wall, the lower groove wall of the wide-mouth groove 14 is pasted with a ball 15 rollingly connected in the rolling groove 12, and an elastic element 16 is arranged between the ball 15 and the micro switch 13; A side hole 17 is also opened on the side wall of the casing 1, and a self-locking unit 18 that can move left and right is embedded in the side hole 17. One end of the self-locking unit 18 abuts against the lower end surface of the push rod 10, and the other end protrudes from the lower end surface of the ejector rod 10. The outer wall surface of the casing 1; the micro switch 13 is a normally closed micro switch.

Further, the casing 1 is sheathed and rotatably connected to the valve seat 2, and the side wall of the casing 1 is also provided with a screw mounting hole 19, and the screw mounting hole 19 is internally threaded to limit the cover. The limit screw-20 of shell 1 rotation.

Further, the side hole 17 has an internal thread, and the self-locking unit 18 is a stop screw 2 threaded on the side hole 17 .

Further, the lower groove wall of the wide-mouth groove 14 forms an included angle of 30 degrees with the vertical plane.

Further, an annular groove 21 is opened on the side of the piston head 71 , and an O-ring 22 is embedded in the annular groove 21 .

Further, the first elastic element 9 and the second elastic element 16 are compression springs.

In this embodiment, initially under pressure conditions, and one end of the self-locking unit 18 is not in contact with the lower end surface of the ejector rod 10, as shown in Figure 2, there is a certain pressure medium in the valve cavity 4 of the valve body 3, and the pressure pushes Piston head 71 overcomes the active force of elastic element 1 9, and pushes the ejector rod 10 connected with piston rod 7 through threads, and ball 15 is pushed out of wide-mouth groove 14, extruding elastic element 2 16, so that the normally closed microswitch 13 The action becomes off, and the signal feedback device does not output a feedback signal; when the medium pressure is released or the medium pressure is lower than the reaction force of the elastic element 9 on the piston head 71, the piston rod 7 moves downward under the action of the elastic element 9. Pull the push rod 10, since the push rod 10 is provided with an inclined wall, the ball 15 is pushed back into the wide-mouth groove 14 by the elastic element 16, the normally closed micro switch 13 is closed, and the feedback signal is output. The signal feedback device will continue to output feedback signals, and it is necessary to manually pull the ejector rod 10 from the outer length of the casing 1 to the upper part of the side hole 17 (that is, the upper part of the self-locking unit 18) so that it no longer outputs the feedback signal. It is also possible to pull the lower end surface of the push rod 10 to the upper part of the side hole 17, and then rotate the self-locking unit 18 (that is, the second stop screw), so that one end of the self-locking unit 18 abuts against the lower end surface of the push rod 10, and the push rod 10 cannot Continue to move downward, and the signal feedback device remains in the state of not outputting a feedback signal, as shown in FIG. 1 .

When the signal feedback device is working, the medium enters the valve cavity 4 of the valve body 3 through the air inlet 5, and pushes the piston rod 7 upward as shown in Figure 1. Since the piston rod 7 is provided with an O-ring 22, when the pressure is greater than the elasticity When the force of component one 9 and the friction between the parts, the piston rod 7 moves up as a whole to drive the ejector rod 10, and the ball 15 located in the wide-mouth groove 14 is squeezed out of the wide-mouth groove 14, thereby compressing the elastic component two 16, the elastic The second element 16 acts on the micro-motion element 13 due to the pressure, so that the micro-motion element 13 is in the disconnected state, and no feedback signal is output at this time.

Furthermore, when the medium pressure is released or the medium pressure is lower than the reaction force of the elastic element one 9, the elastic element one 9 presses the piston rod 7 downward, and the piston rod 7 is connected with the push rod 10 due to the thread, and as the piston 7 moves Also move downwards simultaneously, and in the moving process, the ball 15 that is squeezed out of wide-mouth groove 14 returns in the wide-mouth groove 14 originally, and elastic element two 16 is no longer squeezed, and microswitch 13 is closed, and output feedback signal. Without the action of other external force, the signal feedback device will continuously output the feedback signal, so as to achieve the effect of self-locking.

Furthermore, if the signal feedback device needs to stop outputting the feedback signal, it is necessary to manually pull the push rod 10 exposed on the outer body part of the casing 1, and after pulling it above the side hole 17, rotate the self-locking unit 18, as shown in Figure 1, The ejector rod 10 is limited, and the micro-movement element 13 is disconnected at this time, and no feedback signal is output.

The present invention can be used under the condition that the initial condition is pressurized. After the medium pressure is released or the medium pressure is lower than a certain level, without the help of external force, it can continue to feedback the signal, that is, the self-locking requirement, and it can be used after manual reset. It no longer outputs a feedback signal for the next use.

The preferred specific embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make many modifications and changes according to the concept of the present invention without creative efforts. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning or limited experiments on the basis of the prior art shall be within the scope of protection defined by the claims.

Claims (6)

1. A signal feedback device with initial pressure energy self-locking and manual reset, characterized in that: it includes a valve body (3) composed of a casing (1) and a valve seat (2), and the inside of the valve body (3) It has a valve chamber (4), the bottom of the valve seat (2) is provided with an air inlet (5) connected to the valve chamber (4), and the top of the casing (1) is provided with a guide hole (6). A piston rod (7) is slidably connected to the valve cavity (4), and the lower end of the piston rod (7) has a piston head (71). The retaining ring (8), the elastic element one (9) is arranged between the retaining ring (8) and the piston head (71), and the upper end of the piston rod (7) is fixedly connected with a top that is slidably connected in the guide hole (6). Rod (10), the upper end surface of the ejector rod (10) protrudes from the upper end surface of the casing (1); the side wall of the casing (1) is connected with a switch fixing seat (11), and the switch fixing seat (11) has a rolling groove (12) in communication with the valve cavity (4), one side of the rolling groove (12) is provided with a micro switch (13) fixed on the switch fixing seat (11), and the other The side has a wide-mouth groove (14) opened on the side wall of the ejector rod (10), and the lower groove wall of the wide-mouth groove (14) is pasted with balls ( 15), the ball (15) and the micro switch (13) are provided with elastic element two (16); the side wall of the cover (1) is also provided with a side hole (17), and the side hole (17) A self-locking unit (18) that can move left and right is embedded, one end of the self-locking unit (18) abuts against the lower end surface of the push rod (10), and the other end protrudes from the outer wall surface of the casing (1). 2. The signal feedback device with initial pressure energy self-locking and manual reset according to claim 1, characterized in that: the cover (1) is sheathed and rotatably connected to the valve seat (2), A screw mounting hole (19) is also provided on the side wall of the casing (1), and the screw mounting hole (19) is internally threaded with a stop screw one (20) that restricts the rotation of the casing (1). 3. The signal feedback device with initial pressure self-locking and manual reset according to claim 1 or 2, characterized in that: the side hole (17) has an internal thread, and the self-locking unit (18) is The second stop screw that is threaded on the side hole (17). 4. The signal feedback device with initial pressure energy self-locking and manual reset according to claim 1, characterized in that: the lower groove wall of the wide-mouth groove (14) forms an included angle of 30 degrees with the vertical plane. 5. The signal feedback device with initial pressure energy self-locking and manual reset according to claim 1, characterized in that: the side of the piston head (71) is provided with an annular groove (21), and the annular groove (21) An O-ring (22) is embedded in it. 6. The signal feedback device with initial pressure energy self-locking and manual reset according to claim 1, characterized in that: the first elastic element (9) and the second elastic element (16) are compression springs.