CN214889107U

CN214889107U - Self-closing valve with overpressure protection function

Info

Publication number: CN214889107U
Application number: CN202120745391.5U
Authority: CN
Inventors: 郭建恒; 王勇
Original assignee: Gtc Gas Technology Components Co ltd
Current assignee: Gtc Gas Technology Components Co ltd
Priority date: 2021-04-13
Filing date: 2021-04-13
Publication date: 2021-11-26
Anticipated expiration: 2031-04-13

Abstract

The utility model aims at providing a reasonable in design, response sensitivity and the higher self-closing valve of taking superpressure protect function of security. The utility model discloses a valve main part and high-pressure protection device, the valve main part includes air inlet and the gas outlet that is linked together through the through-hole, high-pressure protection device includes induction mechanism, go up the pull rod, the guide holder, magnet, lower link and locating part, the guide holder sets up on valve main part upper portion, be equipped with hand switch module in the valve main part, it sets up inside the valve main part to go up the pull rod, the upper end of going up the pull rod runs through the guide holder and cooperatees and the lower extreme is connected with induction mechanism with hand switch module, the magnet cover is established on the pull rod and is formed suction with the guide holder, be equipped with the division board in the valve main part, the through-hole is established on the division board, be equipped with the magnetic path that attracts mutually with the lower link in the induction mechanism, the lower link passes the through-hole and is equipped with the locating part, the cover is equipped with expanding spring on the lower link, expanding spring is located between locating part and the division board. The utility model discloses be applied to the technical field of valve.

Description

Self-closing valve with overpressure protection function

Technical Field

The utility model relates to a technical field of valve, in particular to take overpressure protection function's self-closing valve.

Background

Most of gas valve products on the market do not have the high pressure protect function, and the security is relatively poor. Some gas valves have high-pressure protection functions, but the gas valves have poor induction on gas pressure, and only when the flow is very large and the pressure is very high, the protection devices can be triggered, so that effective risk prevention and control are difficult to form. In addition, a common protection device is electrically controlled, and under the conditions of insufficient batteries, power supply damage and the like, the high-voltage protection device cannot work, so that safety risks are caused.

Patent CN212056001U discloses a pipeline gas self-closing valve, this pipeline gas self-closing valve is sensitive to high pressure and high flow response, can in time cut off the gas, and the security is good, and is convenient for produce. However, in practical application, the CJT447-2014 standard is not met, that is, the gas pressure is in the standard range, the pull rod of the pipeline gas self-closing valve is forced to move upwards, but the pull rod is not fully jacked, the limit member cannot be sealed, and a potential safety hazard exists, and the problem needs to be solved urgently.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that overcome prior art not enough, provide a reasonable in design, response sensitive and the higher self-closing valve of taking superpressure protect function of security.

The utility model adopts the technical proposal that: the utility model comprises a valve main body and a high-pressure protection device arranged on the valve main body, wherein the valve main body comprises an air inlet and an air outlet which are communicated with each other through a through hole, the high-pressure protection device comprises a sensing mechanism, an upper pull rod, a guide seat, a magnet, a lower pull rod and a limiting part, the guide seat is arranged on the upper part of the valve main body, a hand-held reset switch component is arranged on the upper end of the valve main body, the upper pull rod is arranged inside the valve main body, the upper end of the upper pull rod runs through the guide seat and is matched with the hand-held switch component, the lower end of the upper pull rod is connected with the sensing mechanism, the magnet is sleeved on the upper part of the upper pull rod and forms suction with the guide seat, a partition plate is arranged in the valve main body, the through hole is arranged on the partition plate, a magnet block which is sucked with the upper end of the lower pull rod is arranged on the sensing mechanism, the lower extreme of lower link passes the through-hole is provided with the locating part, the cover is equipped with expanding spring on the lower link, expanding spring be located the locating part with between the division board.

Further, the valve main body further comprises a lower cabin and an upper cabin, the air inlet is communicated with the lower cabin, the air outlet is communicated with the upper cabin, the partition plate is located between the lower cabin and the upper cabin, a closed wafer is arranged at the upper end of the lower pull rod, and the closed wafer is attracted with the magnetic block and matched with the through hole.

Further, a ventilation ring is arranged in the through hole, a ventilation hole is formed in the center of the ventilation ring, the lower end of the lower pull rod penetrates through the ventilation hole, the rod diameter of the lower pull rod is smaller than the aperture of the ventilation hole, and the closed wafer is matched with the ventilation ring.

Furthermore, the upper end face of the ventilation ring is provided with a sealing convex ring matched with the sealing circular sheet, the ventilation hole is located in the sealing convex ring, a plurality of ventilation grooves are formed between the ventilation hole and the sealing convex ring, and the ventilation grooves are arranged around the ventilation hole.

Further, the hand switch subassembly establishes including the cover carry and draw the cover in the valve main part, carry and draw threaded connection to have the sleeve in the cover, telescopic lower extreme embedding the valve main part inside and with go up the pull rod and cooperate, telescopic periphery cover is equipped with reset spring, reset spring with the valve main part cooperation, telescopic inboard is provided with the boss, go up the upper end of pull rod be provided with boss matched with screens piece.

Further, the number of the vent grooves is four.

Further, a flow limiting valve is arranged at the air inlet.

Furthermore, a protective sleeve is arranged between the lifting sleeve and the valve main body.

Further, be provided with the sign post on the screens piece, the upper end of sign post is provided with the sign lid, the upper end of sign lid is passed carry and is drawn the cover and with carry and draw the cover and cooperate.

Furthermore, a guide hole is formed below the lower cabin, and the lower end of the lower pull rod penetrates through the limiting piece and extends downwards to be in clearance fit with the guide hole.

The utility model has the advantages that: the utility model discloses a suction of magnet and expanding spring's elasticity reach the purpose of restriction gas flow, compare in prior art, the self-closure arouses to accord with CJT447-2014 standard, half-open half-closed's the condition can not appear under the gas pressure that accords with the standard, the security is higher, make the response gas pressure change that response mechanism can be sensitive through cabin structure in the valve body, and the lower pull rod adopts to be connected with response mechanism with the mode that the magnetic path was inhaled mutually, make the gas valve can more accurate response excessive pressure and cut off the gas, overall structure design is ingenious, and is reasonable.

Drawings

Fig. 1 is a schematic perspective view of the present invention;

fig. 2 is a cross-sectional view of the present invention;

fig. 3 is a schematic perspective view of the vent ring.

Detailed Description

As shown in fig. 1 to 3, in the present embodiment, the present invention includes a valve body 1 and a high-pressure protection device disposed on the valve body 1, the valve body 1 includes an air inlet 3 and an air outlet 4 communicated with each other through a through hole 2, the high-pressure protection device includes a sensing mechanism 5, an upper pull rod 61, a guide seat 7, a magnet 8, a lower pull rod 62 and a limiting member 9, the guide seat 7 is disposed on an upper portion of the valve body 1, a hand switch assembly is disposed on an upper end of the valve body 1, the upper pull rod 61 is disposed inside the valve body 1, an upper end of the upper pull rod 61 penetrates through the guide seat 7 and is matched with the hand switch assembly, a lower end of the upper pull rod 61 is connected to the sensing mechanism 5, the magnet 8 is fitted on an upper portion of the upper pull rod 61 and forms a suction force with the guide seat 7, a partition plate 10 is disposed in the valve body 1, the through hole 2 is formed in the partition plate 10, the induction mechanism 5 is provided with a magnetic block 6 which is attracted to the upper end of the lower pull rod 62, the lower end of the lower pull rod 62 penetrates through the through hole 2 and is provided with the limiting piece 9, the lower pull rod 62 is sleeved with an expansion spring 11, and the expansion spring 11 is located between the limiting piece 9 and the partition plate 10. When the gas-fuel injector is used, gas enters from the gas inlet 3 and enters the gas outlet 4 through the through hole 2, the sensing mechanism 5 is a skin membrane and has flexibility, the sensing mechanism 5 senses pressure generated by flow of fuel, when the pressure is too large, the pressure is correspondingly increased, when thrust generated by the pressure is greater than the attraction force of the magnet 8 to the guide seat 7 and the elastic force of the telescopic spring 11, the sensing mechanism 5 is pushed so as to drive the upper pull rod 61 and the lower pull rod 62 to move, the telescopic spring 11 is compressed, finally the lower pull rod 62 cannot move upwards, the magnetic block 6 continues to move upwards along with the sensing mechanism 5 so as not to attract the lower pull rod 62, and the lower pull rod 62 resets under the action of the elastic force and the self-gravity force of the telescopic spring 11, so that the supply of the gas is cut off and a safety protection effect is achieved. The utility model discloses a lower extreme of lower link 62 is add expanding spring 11 to make the gas promote response mechanism 5's dynamics needs are bigger, still can realize the high pressure function of cutting off the gas simultaneously, accords with CJT447-2014 standard, guarantees that the product is up to standard, and lower link 62 with response mechanism 5 adopts the mode of magnetism to inhale to connect, has better sensitivity.

In this embodiment, the valve body 1 further includes a lower chamber 12 and an upper chamber 13, the air inlet 3 is communicated with the lower chamber 12, the air outlet 4 is communicated with the upper chamber 13, the partition plate 10 is located between the lower chamber 12 and the upper chamber 13, the upper end of the lower pull rod 62 is provided with a closed circular piece 63, and the closed circular piece 63 is attracted to the magnetic block 6 and is matched with the through hole 2. The lower chamber 12 and the upper chamber 13 are separated by the partition plate 10, the lower chamber 12 and the upper chamber 13 are communicated through the through hole 2, and the sensing mechanism 5 is arranged in the upper chamber 13; the upper pull rod 61 is connected with the induction mechanism 5, the lower pull rod 62 is attracted to the magnetic block 6 through the closed circular sheet 63 so as to be connected with the induction mechanism 5, the lower pull rod 62 closes the through hole 2 through the closed circular sheet 63, therefore, the pressure of the gas can jack the lower pull rod 62 by overcoming the elastic force of the extension spring 11, and when the lower pull rod 62 is jacked, the closed circular sheet 63 is pressed by the induction mechanism 5, so that the gas circulation can be realized by overcoming the attraction force of the magnet 8.

In this embodiment, a vent ring 14 is disposed in the through hole 2, a vent hole 15 is opened in the center of the vent ring 14, the upper end of the lower pull rod 62 passes through the vent hole 15, and the rod diameter of the lower pull rod 62 is smaller than the hole diameter of the vent hole 15. The vent ring 14 is fixed in the through hole 2, the vent hole 15 is a displacement channel of the lower pull rod 62, and the aperture of the vent hole 15 is larger than the rod diameter of the lower pull rod 62 to ensure that gas can have a channel to circulate.

In this embodiment, the upper end surface of the vent ring 14 is provided with a sealing convex ring 16 matched with the sealing disc 63, the vent hole 15 is located in the sealing convex ring 16, a plurality of vent grooves 17 are arranged between the vent hole 15 and the sealing convex ring 16, and the plurality of vent grooves 17 are arranged around the vent hole 15. The sealing convex ring 16 is matched with the closed circular sheet 63 to be beneficial to jacking the lower pull rod 62, and the vent groove 17 is also used for the circulation of fuel gas, so that the fluency of the fuel gas is improved.

In this embodiment, the hand switch subassembly establishes including the cover carry-up cover 21 on the valve main part 1, carry-up cover 21 female connection has sleeve 22, the lower extreme embedding of sleeve 22 valve main part 1 inside and with go up pull rod 61 and cooperate, the periphery cover of sleeve 22 is equipped with reset spring 23, reset spring 23 with valve main part 1 cooperation, the inboard of sleeve 22 is provided with boss 24, the upper end of going up pull rod 61 be provided with boss 24 matched with screens piece 64. The lifting sleeve 21 is in sliding fit with the valve body 1 and achieves a floating effect through the cooperation of the return spring 23 and the sleeve 22 with the valve body 1, and the upper pull rod 61 floats in the sleeve 22; when the lifting sleeve 21 is lifted, the sleeve 22 overcomes the elasticity of the return spring 23 to move upwards, so that the clamping piece 64 is pulled, the upper pull rod 61 moves upwards along with the lifting sleeve, the closed wafer 62 is not used for closing the through hole 2, the fuel gas can be circulated and used, the lifting sleeve 21 is loosened, the lifting sleeve 21 and the sleeve 22 are reset under the action of the return spring 23, the upper pull rod 61 cannot be reset under the pressure action of the gas pressure, and the gas supply can be ensured.

In the present embodiment, the number of the vent grooves 17 is four. The four air grooves 17 are arranged around the air vent 15, so that the gas can uniformly flow out.

In the present embodiment, a flow restriction valve 18 is provided at the gas inlet 3. The flow limiting valve 18 is used for controlling air inflow of the air inlet 3, so that a first protection effect is achieved, and safety is improved.

In this embodiment, a protection cover 25 is disposed between the pull-up sleeve 21 and the valve main body 1. The protective sleeve 25 is used for reducing friction between the lifting sleeve 21 and the valve main body 1, reducing abrasion and prolonging service life.

In this embodiment, the locking member 64 is provided with an identification post 26, an identification cover 27 is provided on the upper end of the identification post 26, and the upper end of the identification cover 27 passes through the lifting sleeve 21 and is matched with the lifting sleeve 21. The circumference of the identification cover 27 is the same as that of the identification post 28, the outer circumference and the top of the identification cover 27 are coated with green coatings, the outer circumference of the identification post 26 is coated with red coatings, when the air pressure is in a normal state in use, the identification cover 27 is ejected out of the lifting sleeve 21 and floats, the green color is visible to a user at the moment, the normal use is indicated, when the air pressure is in an overpressure state, the identification post 26 is ejected out of the upper end of the lifting sleeve 21, the green color and the red color are visible to the user at the moment, the abnormal state is indicated.

In this embodiment, a guide hole 28 is formed below the lower cabin 12, and the lower end of the lower pull rod 62 passes through the limiting member 9 and extends downward to be in clearance fit with the guide hole 28. Through the cooperation of the guide hole 28 and the lower pull rod 62, the lower pull rod 62 can be guided, so that the floating effect is ensured, and the smooth operation of the whole work is ensured.

The utility model discloses a theory of operation is: when gas is communicated, the gas enters through the gas inlet 3 and fills the lower chamber 12, then the lifting sleeve 21 is lifted, the lifting sleeve 21 drives the sleeve 22 to move upwards, the clamping piece 64 is lapped on the lower end of the sleeve 22 to move upwards, so that the upper pull rod 61, the sensing mechanism 5 and the lower pull rod 62 move upwards, after the lower pull rod 62 moves upwards, the closed wafer 63 does not block the vent hole 15, the gas flows into the upper chamber 13 through the vent hole 15 and jacks the sensing mechanism 5, then flows out through the gas outlet 4 to realize gas supply, at the moment, the lifting sleeve 21 is loosened, the lifting sleeve 21 and the sleeve 22 are reset, the upper pull rod 61, the magnet 8 and the clamping piece 64 float in the sleeve 22, if the gas pressure of the gas is too high, the sensing mechanism 5 bulges upwards in the upper chamber 13, when the lower pull rod 62 moves upwards, the telescopic spring 11 is compressed to the limit, the lower pull rod 62 cannot move upwards, and the magnetic block 6 cannot suck the closed wafer 63, the lower pull rod 62 will return under its own weight and the spring force of the extension spring 11 so that the closing disc 63 re-closes the vent hole 15, thereby cutting off the gas supply.

Although the embodiments of the present invention have been described in terms of practical embodiments, they do not limit the meaning of the present invention, for example, the identification member may be screwed on the current-limiting column, and modifications of the embodiments and combinations with other embodiments will be apparent to those skilled in the art in light of the present description.

Claims

1. The utility model provides a take overpressure protection function's self-closing valve, it includes valve main part (1) and high-pressure protection device, valve main part (1) is including air inlet (3) and gas outlet (4) that are linked together through-hole (2), its characterized in that: the high-voltage protection device comprises an induction mechanism (5), an upper pull rod (61), a guide seat (7), a magnet (8), a lower pull rod (62) and a limiting piece (9), wherein the guide seat (7) is arranged on the upper portion of the valve main body (1), a hand-held switch component is arranged at the upper end of the valve main body (1), the upper pull rod (61) is arranged inside the valve main body (1), the upper end of the upper pull rod (61) penetrates through the guide seat (7) and is matched with the hand-held switch component, the lower end of the upper pull rod is connected with the induction mechanism (5), the magnet (8) is sleeved on the upper portion of the upper pull rod (61) and forms suction with the guide seat (7), a partition plate (10) is arranged in the valve main body (1), a through hole (2) is arranged on the partition plate (10), a magnet block (6) which is sucked with the upper end of the lower pull rod (62) is arranged on the induction mechanism (5), the lower extreme of lower link (62) passes through-hole (2) and is provided with locating part (9), the cover is equipped with expanding spring (11) on lower link (62), expanding spring (11) are located locating part (9) with between division board (10).

2. The self-closing valve with overpressure protection function as claimed in claim 1, wherein: valve main part (1) still includes cabin (12) and last cabin (13) down, air inlet (3) with cabin (12) UNICOM down, gas outlet (4) with go up cabin (13) UNICOM, division board (10) are located cabin (12) down with between last cabin (13), the upper end of lower pull rod (62) is provided with seals disk (63), seal disk (63) with magnetic path (6) attract mutually and with through-hole (2) cooperate.

3. The self-closing valve with overpressure protection function as claimed in claim 2, wherein: a vent ring (14) is arranged in the through hole (2), a vent hole (15) is formed in the center of the vent ring (14), the lower end of the lower pull rod (62) penetrates through the vent hole (15), the rod diameter of the lower pull rod (62) is smaller than the aperture of the vent hole (15), and the closed wafer (63) is matched with the vent ring (14).

4. The self-closing valve with overpressure protection function as claimed in claim 3, wherein: the upper end face of the ventilation ring (14) is provided with a sealing convex ring (16) matched with the sealing circular sheet (63), the ventilation hole (15) is located in the sealing convex ring (16), a plurality of ventilation grooves (17) are arranged between the ventilation hole (15) and the sealing convex ring (16), and the ventilation grooves (17) are arranged around the ventilation hole (15).

5. The self-closing valve with overpressure protection function as claimed in claim 1, wherein: the utility model discloses a valve, including valve body (1), portable switch subassembly is established including the cover carry and draw cover (21) on the valve body (1), carry and draw cover (21) female connection have sleeve (22), the lower extreme embedding of sleeve (22) valve body (1) is inside and with go up pull rod (61) and cooperate, the periphery cover of sleeve (22) is equipped with reset spring (23), reset spring (23) with valve body (1) cooperation, the inboard of sleeve (22) is provided with boss (24), the upper end of going up pull rod (61) be provided with boss (24) matched with screens piece (64).

6. Self-closing valve with overpressure protection function according to claim 4, characterized in that: the number of the vent grooves (17) is four.

7. The self-closing valve with overpressure protection function as claimed in claim 1, wherein: and a flow limiting valve (18) is arranged at the air inlet (3).

8. The self-closing valve with overpressure protection function as claimed in claim 5, wherein: and a protective sleeve (25) is arranged between the lifting sleeve (21) and the valve main body (1).

9. The self-closing valve with overpressure protection function as claimed in claim 5, wherein: be provided with sign post (26) on screens piece (64), the upper end of sign post (26) is provided with sign lid (27), the upper end of sign lid (27) is passed pull-up cover (21) and with pull-up cover (21) cooperate.

10. The self-closing valve with overpressure protection function as claimed in claim 2, wherein: a guide hole (28) is formed below the lower cabin (12), and the lower end of the lower pull rod (62) penetrates through the limiting piece (9) and extends downwards to be in clearance fit with the guide hole (28).