CN203477450U

CN203477450U - Inverse proportion valve

Info

Publication number: CN203477450U
Application number: CN201320595250.5U
Authority: CN
Inventors: 干平; 曾培
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-09-23
Filing date: 2013-09-23
Publication date: 2014-03-12
Anticipated expiration: 2023-09-23

Abstract

The utility model provides an inverse proportion valve which comprises a first seal cover and a second seal cover which are fixed to the two ends of a cylindrical body, the cylindrical body and a spool conducting piston movement in the cylindrical body. An gas inlet, an gas outlet, a first gas overflow hole and a second gas overflow hole are formed in the cylindrical body, and a communicating portion enabling the gas inlet to be communicated with the gas outlet is arranged on the spool. An elastic part is arranged between the spool and the second seal cover. The inverse proportion valve further comprises a diversion pipeline and an gas overflow channel, wherein one end of the diversion pipeline is communicated with the gas inlet, the other end of the diversion pipeline is communicated with the position between the first seal cover and the spool, one end of the gas overflow channel is communicated with the gas outlet, and the other end of the gas overflow channel is communicated with a first gas overflow hole. The spool is provided with a notch which is used for enabling the first gas overflow hole to be communicated with a second gas overflow hole. The inverse proportion valve has the advantages that in the fully open state of the valve, the first gas overflow hole cannot be communicated with the second gas overflow hole, leakage of large amount of gas when an external gas source is transmitted to gas equipment is avoided, and energy is saved.

Description

Inverse proportion valve

Technical field

The utility model relates to equipment gas transmission field, is specifically related to a kind of valve technology.

Background technique

What on air compressor, use at present, is generally inverse proportion valve.Mainly for controlling the aperture size of air compressor gas valve.When gas consumption is large, holds and adjust valve standard-sized sheet, suction valve is all opened thereupon, when gas consumption declines, holds and adjusts valve action that suction valve valve is turned down, thereby reduce air inflow, gas production is reduced, and reaches the equilibrium of supply and demand.Existing inverse proportion valve is to prevent that the too high excessive feed channel valve arranging of gas equipment air pressure inside from being to open or close in situation to be all in communication with the outside.In other words, gas equipment to outside gas leakage, is wasted more serious always.

Model utility content

The purpose of this utility model is to provide inverse proportion valve, solves one or more in above-mentioned prior art problem.

According to an aspect of the present utility model, the inverse proportion valve providing, comprises cylinder and the first capping and second capping of being fixed on its two ends, and the spool that can do piston movement in cylinder; In cylinder, have suction port, air outlet, the first air leakage hole and the second air leakage hole, spool is provided with the interconnecting part that can make suction port and air outlet be communicated with; Between spool and the second capping, be provided with elastic member; Also comprise: shunt conduit, its one end is communicated with suction port, and its other end leads between the first capping and spool; Excessive feed channel, its one end is communicated with air outlet, and its other end is communicated with the first air leakage hole; Spool has breach, for when valve is closed gradually, the first air leakage hole and the second air leakage hole is communicated with.The beneficial effect of this design is, under the state of opening completely at valve, the first air leakage hole and the second air leakage hole can not be communicated with, and a large amount of gas leaks while avoiding external air source to gas equipment gas transmission, have saved the energy.

In some embodiments, elastic member is spring, and one end of spring is connected with spool, and the other end is connected with the second capping.The beneficial effect of this design is that elastic member adopts spring, is convenient to draw materials, is convenient to install, change.

In some embodiments, the second capping is provided with adjustment hole, and adjustment hole is provided with internal thread; Also comprise and can rotate the screw rod by adjustment hole; Elastic member is spring, and one end of spring is connected with spool, and its other end is connected with one end that screw rod screws in described adjustment hole.The beneficial effect of this design is to pass through the elastic force of the compression degree Regulation spring of Regulation spring.

In some embodiments, the end, one end that screw rod screws in described adjustment hole is provided with the first groove, and one end that spring is not connected with spool is placed in the first groove.The beneficial effect of this design is, position that can fixing spring, avoids causing the skew of spring in screw rod rotary course.

In some embodiments, between spool and the second capping, be also provided with movable part, elastic member is spring, and one end of spring is connected with spool, and its other end is connected with movable part; The second capping is provided with adjustment hole, and adjustment hole is provided with internal thread; Also comprise the screw rod that can rotate by adjustment hole and movable part butt.The beneficial effect of this design is, the position of fixing spring more firmly, and do not affect the rotation of screw rod.

In some embodiments, elastic member comprises that homopolarity is oppositely arranged the first magnet and the second magnet, and the first magnet is located at spool near the end, one end of the second capping, and the second magnet is located between the first magnet and the second capping.The beneficial effect of this design is, compared to adopting spring, can avoid spring in using process because humid environment gets rusty, extend the working life of valve.

In some embodiments, the second capping is provided with adjustment hole, and adjustment hole is provided with internal thread; Also comprise the screw rod that can rotate by described adjustment hole and the second magnet butt.The beneficial effect of this design is, can be by regulating the spacing of the first magnet and the second magnet to carry out the elastic force of adjustable elastic parts.

In some embodiments, interconnecting part is the second groove that on spool, hoop is offered.The beneficial effect of this design is that the space that air feed stream passes through is larger.

In some embodiments, interconnecting part is the 3rd groove of radially offering on spool.This design can make to enter air-flow from suction port and not lead to air outlet with intercepting, and flow velocity is faster.

In some embodiments, cylinder inwall is provided with seal.The beneficial effect of this design is to increase spool circumferentially and the seal degree of cylinder inwall.

Accompanying drawing explanation

Fig. 1 is the generalized section of the first mode of execution opening state of the present utility model;

Fig. 2 is the generalized section of the second mode of execution opening state of the present utility model;

Fig. 3 is the generalized section of the third mode of execution closed condition of the present utility model

Fig. 4 is the generalized section of the 4th kind of mode of execution opening state of the present utility model;

Fig. 5 is the generalized section of the 5th kind of mode of execution opening state of the present utility model;

Fig. 6 is the generalized section of the 6th kind of mode of execution opening state of the present utility model;

Fig. 7 is the plan view of the second mode of execution of the utility model spool;

Fig. 8 is the generalized section of the 6th kind of mode of execution closed condition of the present utility model.

Embodiment

Below in conjunction with Figure of description, the utility model is described in more detail.

As shown in Figure 1, the inverse proportion valve that the utility model provides, comprises cylinder 11 and the first capping 12 and second capping 13 of being fixed on its two ends, and the spool 20 that can do piston movement in cylinder 11.Wherein, the first capping 12 and the second capping 13 are fixed on cylinder 11 two ends by welding, the mode such as one-body molded, circumferentially the contacting with the inwall of cylinder 11 of spool 20.

In cylinder 11, have suction port 111, air outlet 112, the first air leakage hole 114 and the second air leakage hole 113, described spool 20 is provided with the interconnecting part that can make described suction port 111 and air outlet 112 be communicated with.It should be noted that, interconnecting part has multiple set-up mode, can be the second groove 21 that hoop is offered on spool 20, can be also as shown in Figure 7, the 3rd groove 22 of radially offering on spool 20.

Between spool 20 and the second capping 13, be provided with elastic member, the elastic member here can have multiple design.As shown in Figure 1, elastic member is spring 50, and one end of spring 50 and spool 20 are near one end butt of the second capping 13, and the other end and the second capping 13 are near a side butt of spool 20; As shown in Figure 4, elastic member can also be the magnet that a pair of homopolarity is oppositely arranged, by the first magnet 51 and the second magnet 52, formed, the first magnet 51 and the second magnet 52 are oppositely arranged, and relative face is homopolarity, the first magnet 51 is fixed on spool 20 near one end of the second capping 13 by the mode such as pasting or inlay, and the second magnet 52 is located between the first magnet 51 and the second capping 13.

In addition also comprise:

Shunt conduit 30, its one end is communicated with suction port 111, and its other end leads between the first capping 12 and spool 20.The concrete set-up mode of shunt conduit 30 can have multiple: the first, as shown in Fig. 1 to 5, be opened in cylinder 11 interior, and one end leads to suction port 111, and the other end leads to the space between the first capping 12 and spool 20; Second, as shown in Figure 6, shunt conduit 30 is simultaneously through cylinder 11 interior and the first capping 12 inside, and wherein suction port 111 is led to through cylinder 11 interior in one end, and the other end leads to the space between the first capping 12 and spool 20 through the first capping 12.It should be noted that, the key that shunt conduit 30 is arranged is, suction port 111 is led in its one end, and the other end leads to the space between the first capping 12 and spool 20.Its concrete line arrangement mode is not construed as limiting, and can in valve body, pass, also can be from valve body stringing separately.

Excessive feed channel 40, its one end is communicated with described air outlet 112, and its other end is communicated with the first air leakage hole 114; Spool 20 has breach 23, for when valve is closed gradually, the first air leakage hole 114 and the second air leakage hole 113 is communicated with.Under the state of valve opening, spool 20 has cut off the connection between the first air leakage hole 114 and the second air leakage hole 113.As shown in Figure 8, when valve is closed gradually, the first air leakage hole 114 and the second air leakage hole 113 are communicated with breach 23 gradually simultaneously, thereby realize gradually the connection between the first air leakage hole 114 and the second air leakage hole 113.

As shown in Figures 1 to 6, during valve opening, in the raw, the interconnecting part of spool 20 is placed between suction port 111 and air outlet 112 elastic member, and suction port 111 and air outlet 112 are in connected state.Gas can enter from suction port 111,112 outflows from air outlet after interconnecting part.Now, spool 20 has cut off the connection of the first air leakage hole 114 and the second air leakage hole 113.

As shown in Figure 8, during valve closing, elastic member is in compressive state, and the interconnecting part of spool 20 is not placed between suction port 111 and air outlet 112, and spool 20 has cut off the connection of suction port 111 and air outlet 112.Gas can not flow to air outlet 112 from suction port 111.In addition, the first air leakage hole 114 and the second air leakage hole 113 are exposed to indentation, there simultaneously, and the first air leakage hole 114 and the second air leakage hole 113 are in complete connected state.

In actual use, valve is under normal conditions in opening state, and suction port 111 connects external air source, and air outlet 112 connects gas equipment.The gas of external air source can be from suction port 111 by interconnecting part, and from air outlet, 112 enter gas equipment.Externally under the prerequisite of the uninterrupted air feed of source of the gas, when the gas consumption of gas equipment reduces, when supply gas pressure raises gradually, some gas enters the space between the first capping 12 and spool 20 from suction port 111 by shunt conduit 30, makes the air pressure in this space increase gradually.When the air pressure in the space between the first capping 12 and spool 20 is greater than the elastic force of elastic member, the elastic force that the air pressure promotion spool 20 in this space overcomes elastic member moves to the second capping 13 directions.In this process, interconnecting part is removed gradually between suction port 111 and air outlet 112, progressively reduces the connection degree between suction port 111 and air outlet 112, until cut off connection completely by spool 20.Meanwhile, the movement of spool 20, breach 23 also moves thereupon, and the first air leakage hole 114 and the second air leakage hole 113 are exposed to breach 23 places gradually simultaneously, and the first air leakage hole 114 and the second air leakage hole 113 are realized connection gradually.Now, unnecessary gas backstreaming to air outlet 112, and enters the feed channel 40 of overflowing and drains into outside valve by the first air leakage hole 114, breach 23 and the second air leakage hole 113 in gas equipment.What need to stress is, because synchronizeing, the process that the first air leakage hole 114 is communicated with the second air leakage hole 113 and the process of closing gradually of valve carry out, when the air pressure of valve inlet end and outlet side reaches balance, spool 20 stops moving and maintains this state, therefore the critical function of this valve is not merely standard-sized sheet full cut-off, the more important thing is that according to gas consumption the opening degree of timely adjustment valve has avoided the inner long-term high pressure of gas equipment to cause parts damages.

It should be noted that and only have between the first capping 12 and spool 20 when air pressure is greater than the elastic force of elastic member, just can moving valve core 20, throttle down.Therefore, the elastic force of elastic member is the key that control valve is closed.For the inverse proportion valve of the utility model design can be used in plurality of devices, should be according to concrete needs, the elastic force of adjustable elastic parts.

For realizing the object of adjustable elastic parts elastic force, can in the second capping 13, offer female adjustment hole 131, and can rotate by the screw rod 70 of adjustment hole 131.

If elastic member is spring 50, as shown in Figure 2, one end of spring 50 and spool 20 are near end, one end butt of the second capping 13, and the other end of spring 50 and screw rod 70 screw in one end butt of adjustment hole 131.When screw rod 70 inwardly screws in, can cause the compression of spring 50, thereby improve the elastic force of spring 50.Otherwise, when screw rod 70 outwards screws out, reduce the elastic force of spring 50.In this design, can also be as shown in Figure 3, the first groove 701 is axially inwardly offered along it in the end, one end that screws in adjustment hole 131 at screw rod 70, spring 50 is not placed in the first groove 701 with one end of spool 20 butts, this measure can fixing spring 50 position, avoid causing the skew of spring 50 in screw rod 70 rotary courses.

If elastic member is magnet, as shown in Figure 4, screw rod 70 is rear and the second magnet 52 butts through adjustment hole 131.When screw rod 70 inwardly screws in, can promote the second magnet 52 and move to the first magnet 51 directions, thereby dwindle the distance between the first magnet 51 and the second magnet 52, and then improve two elastic force between magnet.Otherwise, when screw rod 70 outwards screws out, reduce the elastic force between magnet.

Need to further illustrate, for further guaranteeing that elastic member can not be offset.Can also between elastic member and the second capping 13, add a movable part 60 as shown in Figure 5, movable part 60 is near a side of spool 20 and elastic member is fixed or butt, and opposite side and screw rod 70 screw in one end butt of adjustment holes 131.This design can be completely fixed elastic member, and can not affect the rotation of screw rod 70.When screw rod 70 rotates, first can drive the change in location of movable part 60, and then adjust the spacing between movable part 60 and spool 20, realize accordingly the adjusting of elastic member elastic force.

In addition, the gas pressure between the first capping 12 and spool 20 is the power producer of throttle down, must guarantee the seal in this space.Moreover the gap of the outer wall that only has spool 20 circumferentially and between the inwall of cylinder 11 just enables thoroughly closing of valve for enough hour.Given this, should guarantee that the gap between spool 20 and cylinder 11 inwalls should be as much as possible little.To this, can fix a circle seal 90 at cylinder 11 inwalls.

More than statement is only optimal way of the present utility model; it should be pointed out that to those skilled in the art, do not departing under the prerequisite of the utility model creation design; can also make some distortion and improvement, within these also should be considered as protection domain of the present utility model.

Claims

1. inverse proportion valve, is characterized in that, the first capping (12) and the second capping (13) that comprise cylinder (11) and be fixed on its two ends, and the spool (20) that can do piston movement in described cylinder (11); In described cylinder (11), have suction port (111), air outlet (112), the first air leakage hole (114) and the second air leakage hole (113), described spool (20) is provided with the interconnecting part that can make described suction port (111) and described air outlet (112) be communicated with; Between described spool (20) and described the second capping (13), be provided with elastic member; Also comprise: shunt conduit (30), its one end is communicated with described suction port (111), and its other end leads between described the first capping (12) and described spool (20);

Excessive feed channel (40), its one end is communicated with described air outlet (112), and its other end is communicated with described the first air leakage hole (114);

Described spool (20) has breach (23), for when valve is closed gradually, described the first air leakage hole (114) and the second air leakage hole (113) is communicated with.

2. inverse proportion valve according to claim 1, is characterized in that, described elastic member is spring (50), and one end of described spring (50) is connected with described spool (20), and the other end is connected with described the second capping (13).

3. inverse proportion valve according to claim 1, is characterized in that, described the second capping (13) is provided with adjustment hole (131), and described adjustment hole (131) is provided with internal thread; Also comprise and can rotate by the screw rod (70) of described adjustment hole (131); Described elastic member is spring (50), and one end of described spring (50) is connected with described spool (20), and its other end is connected with one end that described screw rod (70) screws in described adjustment hole (131).

4. inverse proportion valve according to claim 3, it is characterized in that, the end, one end that described screw rod (70) screws in described adjustment hole (131) is provided with the first groove (701), and one end that described spring (50) is not connected with described spool (20) is placed in described the first groove (701).

5. inverse proportion valve according to claim 1, it is characterized in that, between described spool (20) and described the second capping (13), be also provided with movable part (60), described elastic member is spring (50), one end of described spring (50) is connected with described spool (20), and its other end is connected with described movable part (60); Described the second capping (13) is provided with adjustment hole (131), and described adjustment hole (131) is provided with internal thread; Also comprise and can rotate the screw rod (70) with described movable part (60) butt by described adjustment hole (131).

6. inverse proportion valve according to claim 1, it is characterized in that, described elastic member comprises that homopolarity is oppositely arranged the first magnet (51) and the second magnet (52), described the first magnet (51) is located at described spool (20) near the end, one end of described the second capping (13), and described the second magnet (52) is located between described the first magnet (51) and described the second capping (13).

7. inverse proportion valve according to claim 6, is characterized in that, described the second capping (13) is provided with adjustment hole (131), and described adjustment hole (131) is provided with internal thread; Also comprise and can rotate the screw rod (70) with described the second magnet (52) butt by described adjustment hole (131).

8. inverse proportion valve according to claim 1, is characterized in that, described interconnecting part is the second groove (21) that the upper hoop of described spool (20) is offered.

9. inverse proportion valve according to claim 1, is characterized in that, described interconnecting part is the 3rd groove (22) of radially offering on described spool (20).

10. according to the inverse proportion valve described in claim 1 to 9 any one, it is characterized in that, in described cylinder (11), be provided with seal (90).