CN202146227U

CN202146227U - Pressure relief valve

Info

Publication number: CN202146227U
Application number: CN201120278447U
Authority: CN
Inventors: 景昱东
Original assignee: Ningbo AAA Group Electric Appliance Co Ltd
Current assignee: Ningbo AAA Group Electric Appliance Co Ltd
Priority date: 2011-07-29
Filing date: 2011-07-29
Publication date: 2012-02-22
Anticipated expiration: 2021-07-29

Abstract

The utility model relates to a pressure relief valve which is characterized by comprising the following components: a valve housing which is provided with a channel and is provided with a water inlet at a side wall; a valve seat which is provided with a channel, is fixed at the lower part of the channel of the valve housing and is furthermore provided with a connection channel on the side wall; a valve core which is provided with a water outlet channel; a valve sleeve which is provided in the channel of the valve seat; a first spring which is supported between the valve core and the valve sleeve, while the upper circumferential wall of the valve core can be hydraulically matched with the inner wall of the valve sleeve hermetically at a state that the valve sleeve moves downwards, and a clearance for water current flow is formed between the upper circumferential wall of the valve core and the inner wall of the valve sleeve at a state that the valve sleeve moves upwards; a valve rod which is used for pushing the valve sleeve for moving vertically; and a driving locking structure which is used for driving the valve rod for moving vertically and keeping the valve rod to a state of pushing the valve to move downwards. A pure mechanical pressure relief structure is adopted for the pressure relief valve. In operation, whether the water inlet is communicated with the water outlet channel can be controlled through pushing the valve rod. The pressure relief valve further has the following advantages: simple and convenient operation, small number of related components, simple integral structure, low cost and high convenience in assembling.

Description

A kind of relief valve

Technical field

The utility model relates to a kind of relief valve.

Background technology

Coffee machine is after having boiled coffee, and the residual water that certain pressure is arranged in brewing cavity and the water under high pressure pipeline is the safety that guarantees that coffee machine is opened; Need earlier the water of certain pressure residual in this brewing cavity to be laid down earlier; Existing coffee machine is to realize through magnetic valve, after coffee machine is brewageed end, through programme-control; Magnetic valve is opened, laid down the water that this has certain pressure.Because the manufacturing cost of magnetic valve is high, the control relative complex, and damage easily, therefore increased the manufacturing cost of coffee machine virtually.

Summary of the invention

The utility model technical problem to be solved is to provide to above-mentioned prior art present situation that a kind of this relief valve is a mechanical structure in order to substitute in the coffee machine relief valve in order to the magnetic valve of pressure release, have cost low, control simple advantage.

The utility model solves the problems of the technologies described above the technical scheme that is adopted: a kind of relief valve is characterized in that: comprise the valve casing with the passage that axially runs through, the sidewall of valve casing has the water inlet that communicates with said passage; Valve seat with the passage that axially runs through is fixed on the bottom of the passage of valve casing, has the passage that is communicated with valve seat and the interface channel of said water inlet on the sidewall of valve seat; Spool with the exhalant canal that axially runs through and communicate with the external world is fixed on the bottom in the valve seat; Valve pocket is positioned at the passage and the slippage up and down of valve seat; First spring; Be supported between spool and the valve pocket and make valve pocket keep moving trend; Under the state that valve pocket moves down; Liquid sealing cooperates between the Zhou Bineng of spool upper end and the inwall of valve pocket, and under the state that moves on the valve pocket, the gap of passing through is flowed in formation water supply between the Zhou Bineng of spool upper end and the inwall of valve pocket; In order to promote the valve rod that valve pocket moves up and down, be positioned at the top of the passage of valve casing; Drive locking structure, move up and down, and can valve rod be remained on the state that valve pocket moves down that promotes in order to drive said valve rod.

Above-mentioned driving locking structure comprises second spring, acts on said valve rod and makes valve rod keep moving trend; Button constrains in the interior and only slippage up and down of passage of valve casing, and button stretches out the upper surface of valve casing; Following bull stick is located in the passage of valve casing and between button and valve rod, and the upper end of said valve rod is plugged in down bull stick bottom and can be with descending bull stick move down; Ball pen type spinning location structure; Be located between button and the following bull stick; This ball pen type spinning location structure can be converted into down the rectilinear motion and the circular motion of bull stick by the rectilinear motion that button is single, and can under the state that valve rod moves down, following bull stick be positioned at the middle part of the passage of valve casing.

This drives the pressing structure of locking structure with reference to ball pen, has easy to operate advantage, only need push a knob down; Valve rod is just depressed valve pocket, and makes valve pocket be in depressed state all the time, and liquid sealing cooperates between the Zhou Bineng of spool upper end and the inwall of valve pocket; This relief valve cuts out, and only need push button once more during unlatching, and following bull stick no longer limits valve rod; Valve rod moves under the effect of second spring, and valve pocket is not owing to there be holding of valve rod, and under the elastic force effect of first spring, moves; Form the gap that the stream that supplies water passes through between the Zhou Bineng of spool upper end and the inwall of valve pocket, relief valve is opened.

Above-mentioned ball pen type spinning location structure does, the lower surface periphery of button has lower surface tooth down, the upper surface periphery of following bull stick have up touch the upper surface tooth that cooperates with said lower surface toe joint; Have the annular protrusion of longitudinally arranging on the inwall of the passage of said valve casing; Have a plurality of ring teeth at interval on the lower surface of this annular protrusion, have a plurality of deep trouths on the annular protrusion at interval, on the said bull stick side face down two convex tendons that longitudinally are provided with are set at least; After bull stick rotates an angle down; Said convex tendon can slippage in said deep trouth, and after bull stick was rotated further an angle down, described convex tendon was fastened on the lower surface of said ring tooth; At least have the number projection identical with deep trouth on the side face of button lower end, this projection is positioned at said deep trouth and slippage up and down.

The spinning Drive Structure that this ball pen type spinning location structure is a pen core in the ball pen is identical; Wherein valve rod is equivalent to the pen core in the ball pen; Button is equivalent to the last runner in the ball pen, and following bull stick is equivalent to the following runner in the ball pen, and the passage of valve casing is equivalent to the hole of the last shaft of a writing brush in the ball pen; The concrete structure of certain ball pen type spinning location has a variety of, does not limit to and aforementioned structure.

Above-mentioned deep trouth has four, is uniformly distributed along the circumference, and described convex tendon has four, and described projection has four.Four deep trouths can better be given button and following bull stick guiding.

The lower end of above-mentioned spool is threaded in the valve seat, is provided with first sealing ring between the inwall of the middle part of spool and the passage of valve seat.This structure is convenient to spool is assembled in the valve seat, sealing ring is set between spool and the valve seat in addition forms good liquid sealing.

Above-mentioned spool upper periphery mask has male cone (strobilus masculinus), and the inwall below of valve pocket has inner conical surface, forms said gap between male cone (strobilus masculinus) and the inner conical surface, and the spool upper periphery also is embedded with second sealing ring that can cooperate with the inwall of valve pocket.This structure diminishes the gap gradually in the valve pocket folding process, make the keying of water inlet and exhalant canal that individual transition gradually arranged, and second sealing ring is set can forms better liquid sealing effect with valve pocket.

Above-mentioned valve casing is made up of lower casing and lower casing, and upper casing removably is connected the top of lower casing, and said water inlet is arranged on the lower casing.Valve casing is removably connected by two parts up and down and forms, and is convenient to each parts of assembling in valve casing.

The upper surface of above-mentioned lower casing has along circle spacing setting and upwardly extending three elastic fastening hooks; Have three slots that match with said grab on the perisporium of said upper casing; The lower ending opening of slot; The top of slot has the hole clipping that the hook portion with elastic fastening hook matches, and said elastic fastening hook is plugged in the slot, and the hook portion of elastic fastening hook is fastened in the said hole clipping simultaneously.Upper casing and lower casing adopt the buckle syndeton to have advantage easy to assembly, also can adopt certainly to have other removably connected mode now, as adopting thread connecting mode.

Be provided with the 3rd sealing ring between the inwall of the outer peripheral face of above-mentioned valve seat and the passage of valve casing, the lower ends downward of valve seat is stretched out lower casing, the lower end of valve seat be fastened on the lower casing through jump ring.

The middle part of above-mentioned valve rod has annular shoulder block, and the lower end abutment of said second spring is on lower casing, and the upper end of second spring is resisted against on the annular shoulder block.

Compared with prior art; The advantage of the utility model is: this relief valve adopts and deposits mechanically pressure relief, only need promote valve rod during operation and whether just can control water inlet and exhalant canal conducting, the circuit control structure that does not have magnetic valve to assist; Simple to operation; And this relief valve to relate to parts few, overall structure is simple, cost is low, easy to assembly.

Description of drawings

Fig. 1 is the perspective view of the embodiment of the invention;

Fig. 2 is the cutaway view (relief valve opening) of the embodiment of the invention;

Fig. 3 is the cutaway view (relief valve closed condition) of the embodiment of the invention;

Fig. 4 is the three-dimensional exploded view of the embodiment of the invention;

Fig. 5 is the perspective view of upper casing in the embodiment of the invention.

The specific embodiment

Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.

Shown in Fig. 1～5, be a preferred embodiment of the utility model.

A kind of relief valve comprises

Valve casing 1 with the passage 11 that axially runs through; Valve casing 1 is made up of lower casing 13 and lower casing 14, and upper casing 13 removably is connected the top of lower casing 14 through the buckle ways of connecting, and promptly the upper surface of lower casing 14 has along the circle spacing also upwardly extending three elastic fastening hooks 15 are set; Have three slot 16s that match with grab 15 on the perisporium of upper casing 13; The lower ending opening of slot 16, the top of slot 16 have the hole clipping 161 that the hook portion 151 with elastic fastening hook matches, and elastic fastening hook 15 is plugged in the slot 16; The hook portion 151 of elastic fastening hook is fastened in the hole clipping 161 simultaneously, and the sidewall of lower casing 14 has the water inlet 12 that communicates with passage 11.

Valve seat 2 with the passage 21 that axially runs through is fixed on the bottom of the passage 11 of valve casing, has the passage 21 that is communicated with valve seat and the interface channel 22 of water inlet 12 on the sidewall of valve seat 2; Be provided with two the 3rd sealing rings 23 between the inwall of the outer peripheral face of valve seat 2 and the passage of valve casing 11, the lower ends downward of valve seat 2 is stretched out lower casing 13, the lower end of valve seat 2 be fastened on the lower casing 13 through jump ring 10.

Spool 3 with the exhalant canal 31 that axially runs through and communicate with the external world, the lower end of spool 3 are threaded in the bottom in the valve seat 2, are provided with first sealing ring 32 between the inwall of the middle part of spool 3 and the passage of valve seat 21.

Valve pocket 4 with running-on is positioned at the passage 21 and the slippage up and down of valve seat, is provided with the 4th sealing ring 42 between the inwall of the periphery wall of valve pocket 4 and the passage of valve seat 21; Spool 3 upper periphery masks have male cone (strobilus masculinus) 33, and the inwall below of valve pocket 4 has inner conical surface 41.

First spring 5; Be supported between spool 3 and the valve pocket 4 and make valve pocket 4 keep moving trend, under the state that valve pocket 4 moves down, liquid sealing cooperates between the Zhou Bineng of spool 3 upper ends and the inwall of valve pocket 4; Under the state that moves on the valve pocket 4; Form the gap X that the stream that supplies water passes through between the Zhou Bineng of spool 3 upper ends and the inwall of valve pocket 4, form gap X between male cone (strobilus masculinus) 32 and the inner conical surface 41, spool 3 upper periphery also are embedded with second sealing ring 34 that can cooperate with the inwall of valve pocket 4.

In order to promote the valve rod 6 that valve pocket 4 moves up and down, be positioned at the top of the passage 11 of valve casing.

Drive locking structure, move up and down, and can valve rod 6 be remained on the state that valve pocket 4 moves down that promotes in order to drive said valve rod 6.

The driving locking structure comprises

Second spring 7 acts on valve rod 6 and makes valve rod 6 keep moving trend, and the middle part of valve rod 6 has the lower end abutment of annular shoulder block 61, the second springs 7 on lower casing 13, and the upper end of second spring 7 is resisted against on the annular shoulder block 61.

Button 8 constrains in the passage 11 interior and only slippages up and down of valve casing, and button 8 stretches out the upper surface of valve casing 1.

Following bull stick 9 is located in the passage 11 of valve casing and between button 8 and valve rod 6, and the upper end of valve rod 6 is plugged in down bull stick 9 bottoms and can be with descending bull stick 9 move down.

Ball pen type spinning location structure; Be located between button 8 and the following bull stick 9; This ball pen type spinning location structure can be converted into down button 8 single rectilinear motions the rectilinear motion and the circular motion of bull stick 9; And can under the state that valve rod 6 moves down, following bull stick 9 be positioned at the middle part of the passage 11 of valve casing.

Ball pen type spinning location structure does, the lower surface periphery of button 8 has lower surface tooth 81 down, and the upper surface periphery of following bull stick 9 has and upper surface teeth 91 said lower surface tooth 81 contact matching up; Have the annular protrusion of longitudinally arranging 111 on the inwall of the passage 11 of valve casing, have a plurality of ring teeth 112 at interval on the lower surface of this annular protrusion 111, have a plurality of deep trouths 113 on the annular protrusion 111 at interval; Deep trouth 113 has four, is uniformly distributed along the circumference, and four convex tendons 92 that longitudinally are provided with are set on following bull stick 9 side faces; After bull stick 9 rotates an angle down; Convex tendon 92 can slippage in deep trouth 113, and after bull stick 9 was rotated further an angle down, convex tendon 92 was fastened on the lower surface of ring tooth 112; Have four projections 82 on the lower end side face of button 8, this projection 82 is positioned at deep trouth 113 and slippage up and down.

The operation principle and the process of this relief valve are following:

As shown in Figure 4, during locking, push button 8; Bull stick 9 and valve rod 6 moved down along the passage 11 of valve casing 1 under button 8 drove, because the rib 63 of the projection 82 of button and following bull stick cooperates with deep trouth 113 in folding process, bull stick 9 moves down for straight line so folding process button 8 reaches down; Until the restriction of the convex tendon 92 disengaging deep trouths 113 of bull stick down, upper surface tooth 91 mating reactions of tooth 81 and following bull stick in the lower surface of button simultaneously, following bull stick 9 rotates an angle; Convex tendon 92 is fastened on ring tooth 112 lower surfaces; Following bull stick 9 is limited, and the valve rod 6 that is positioned at bull stick 9 belows down simultaneously is also limited, and therefore first spring 5 can not drive and move on the valve rod 6; Valve rod 6 is just depressed valve pocket 4, and makes valve pocket 4 be in depressed state all the time, and liquid sealing cooperates between the Zhou Bineng of spool 3 upper ends and the inwall of valve pocket 4, and this relief valve cuts out, and promptly is not communicated with between water inlet 12 and the exhalant canal 31.

As shown in Figure 3, only need push button once more during unlatching, through upper surface tooth 91 mating reactions of tooth 81 and following bull stick in the lower surface of button; Following bull stick 9 is rotated further an angle; Convex tendon 92 just in time turns to deep trouth 113 positions and goes out, and under the effect of holding of first spring 5, drives valve rod 6, following bull stick 9 and button 8 along moving on the first longitudinal rod hole 11, and following bull stick 9 no longer limits valve rod 6; Valve rod 6 moves under the effect of second spring 7; Valve pocket 4 is not owing to there be holding of valve rod 9, and on the elastic force effect of first spring 5 under, moves, and forming water supply between the Zhou Bineng of spool 3 upper ends and the inwall of valve pocket 4 flows the gap X that passes through; After flowed out by exhalant canal 31, open by relief valve through interface channel 22, gap X for the water that flows into from water inlet 12.

Claims

1. a relief valve is characterized in that: comprise

Valve casing (1) with the passage (11) that axially runs through, the sidewall of valve casing (1) have the water inlet (12) that communicates with said passage (11);

Valve seat (2) with the passage (21) that axially runs through is fixed on the bottom of the passage (11) of valve casing, has the passage (21) that is communicated with valve seat and the interface channel (22) of said water inlet (12) on the sidewall of valve seat (2);

Spool (3) with the exhalant canal (31) that axially runs through and communicate with the external world is fixed on the bottom in the valve seat (2);

Valve pocket (4) is positioned at the passage (21) and the slippage up and down of valve seat;

First spring (5); Be supported between spool (3) and the valve pocket (4) and make valve pocket (4) keep moving trend; Under the state that valve pocket (4) moves down; Liquid sealing cooperates between the Zhou Bineng of spool (3) upper end and the inwall of valve pocket (4), and under the state that moves on the valve pocket (4), the gap of passing through (X) is flowed in formation water supply between the Zhou Bineng of spool (3) upper end and the inwall of valve pocket (4);

In order to promote the valve rod (6) that valve pocket (4) moves up and down, be positioned at the top of the passage (11) of valve casing;

Drive locking structure, move up and down, and can valve rod (6) be remained on the state that valve pocket (4) moves down that promotes in order to drive said valve rod (6).

2. relief valve according to claim 1 is characterized in that: said driving locking structure comprises

Second spring (7) acts on said valve rod (6) and makes valve rod (6) keep moving trend;

Button (8) constrains in the interior and only slippage up and down of passage (11) of valve casing, and button (8) stretches out the upper surface of valve casing (1);

Following bull stick (9) is located in the passage (11) of valve casing and is positioned between button (8) and the valve rod (6), and the upper end of said valve rod (6) is plugged in down bull stick (9) bottom also can be with descending bull stick (9) move down;

Ball pen type spinning location structure; Be located between button (8) and the following bull stick (9); This ball pen type spinning location structure can be converted into down the single rectilinear motion of button (8) rectilinear motion and the circular motion of bull stick (9); And under the state that can move down in valve rod (6), will descend bull stick (9) to be positioned at the middle part of the passage (11) of valve casing.

3. relief valve according to claim 2; It is characterized in that: said ball pen type spinning location structure does; The lower surface periphery of button (8) has lower surface tooth (81) down; The upper surface periphery of following bull stick (9) has and upper surface tooth (91) said lower surface tooth (81) contact matching up, has the annular protrusion of longitudinally arranging (111) on the inwall of the passage of said valve casing (11), has a plurality of ring teeth (112) on the lower surface of this annular protrusion (111) at interval; Annular protrusion (111) is gone up and is had a plurality of deep trouths (113) at interval; Two convex tendons (92) that longitudinally are provided with are set on said down bull stick (9) side face at least, and after bull stick (9) rotated an angle down, said convex tendon (92) can slippage in said deep trouth (113); After bull stick (9) is rotated further an angle down; Described convex tendon (92) is fastened on the lower surface of said ring tooth (112), has the number projection (82) identical with deep trouth (113) on the side face of button (8) lower end at least, and this projection (82) is positioned at said deep trouth (113) and slippage up and down.

4. relief valve according to claim 3 is characterized in that: said deep trouth (113) has four, is uniformly distributed along the circumference, and described convex tendon (63) has four, and described projection (82) has four.

5. relief valve according to claim 1 is characterized in that: the lower end of said spool (3) is threaded in the valve seat (2), is provided with first sealing ring (32) between the inwall of the passage (21) of the middle part of spool (3) and valve seat.

6. relief valve according to claim 1; It is characterized in that: said spool (3) upper periphery mask has male cone (strobilus masculinus) (33); The inwall below of valve pocket (4) has inner conical surface (41); Form said gap (X) between male cone (strobilus masculinus) (32) and the inner conical surface (41), spool (3) upper periphery also is embedded with second sealing ring (34) that can cooperate with the inwall of valve pocket (4).

7. according to arbitrary described relief valve in the claim 1～6, it is characterized in that: said valve casing (1) is made up of lower casing (13) and lower casing (14), and upper casing (13) removably is connected the top of lower casing (14), and said water inlet (12) is arranged on the lower casing (14).

8. relief valve according to claim 7; It is characterized in that: the upper surface of said lower casing (14) has along circle spacing setting and upwardly extending three elastic fastening hooks (15); Have three slots (16) that match with said grab (15) on the perisporium of said upper casing (13); The lower ending opening of slot (16); The top of slot (16) has the hole clipping (161) that the hook portion (151) with elastic fastening hook matches, and said elastic fastening hook (15) is plugged in the slot (16), and the hook portion (151) of elastic fastening hook is fastened in the said hole clipping (161) simultaneously.

9. relief valve according to claim 7; It is characterized in that: be provided with the 3rd sealing ring (23) between the inwall of the passage (11) of the outer peripheral face of said valve seat (2) and valve casing; The lower ends downward of valve seat (2) is stretched out lower casing (13), the lower end of valve seat (2) be fastened on the lower casing (13) through jump ring (10).

10. relief valve according to claim 7 is characterized in that: the middle part of said valve rod (6) has annular shoulder block (61), and the lower end abutment of said second spring (7) is on lower casing (13), and the upper end of second spring (7) is resisted against on the annular shoulder block (61).