CN201687709U - Energy-saving inverse proportion valve - Google Patents

Abstract

The utility model relates to an energy-saving inverse proportion valve, which comprises a valve body. A valve seat is arranged at the lower part of the valve body. An air outlet is arranged in the valve seat. A valve core is arranged on the upper end of the valve seat. A cavity is arranged between the upper surface of the valve seat and the valve body. A valve bonnet is arranged at the upper part of the valve body. The upper part of the valve bonnet is arranged outside the valve body. An upper spring seat and a lower spring seat are arranged in the valve bonnet. The upper spring seat is connected with the valve bonnet through an adjusting screw. The lower spring seat is fixedly connected with a valve plug through screws. A diaphragm is arranged on the lower surface of the lower spring seat. A spring is arranged between the upper spring seat and the lower spring seat. A diaphragm cavity is arranged between the lower surface of the diaphragm and the valve body. A pressure signal port, a pressure output port and a pressure input port are arranged on the outer wall of the valve body. The pressure input port is communicated with the cavity through a throttling pore. The pressure signal port is communicated with the diaphragm cavity. Both the air outlet and the pressure output port are communicated with the cavity. The energy-saving inverse proportion valve has the advantages of energy conservation and emission reduction, simple structure and low cost.

Description

Energy-saving inverse proportion valve

Technical field:

The utility model relates to a kind of energy-saving inverse proportion valve, is used to control the suction valve of rotary air compressor.

Background technique:

Development along with social science, the rotary compressor of China still is in developing stage, so the inverse proportion valve that air compressor uses on the market all depends on import, increased cost, and the inverse proportion valve of import is not so perfect yet, existing inverse proportion valve all is by the relief opening throttling, push down spool with diaphragm, the tolerance size of spool control incoming pressure mouth, when air compressor uses this inverse proportion valve, the throttling gas circuit of one road 1mm is arranged as long as after the air compressor start, will exit to atmosphere all the time, the loss that the leakage aperture of a this diameter 1mm causes every year is up to about 3525 degree electricity, when using multiple air compressors at the same time, and not only power consumption, the expense that makes increases, and runs in the opposite direction with the energy-saving and emission-reduction that advocate in the whole world.

The model utility content:

The purpose of this utility model is in order to overcome above deficiency, a kind of energy-saving and emission-reduction to be provided, and is simple in structure, the energy-saving inverse proportion valve of reducing expenses.

The purpose of this utility model is achieved through the following technical solutions: a kind of energy-saving inverse proportion valve, comprise valve body, in valve body lower portion valve seat is housed, be provided with a relief opening in the valve seat, the upper end of valve seat is provided with spool, there is a cavity between the upper surface of valve seat and the valve body, in the top of valve body valve gap is housed, the top of valve gap places the outside of valve body, and valve gap is a hollow-core construction, be provided with upper spring seat and lower spring cup in the valve gap, upper spring seat is connected with valve gap by adjusting screw, lower spring cup is fixedlyed connected with spool by screw, lower surface at lower spring cup is provided with diaphragm, between upper spring seat and lower spring cup, be provided with spring, be provided with a diaphragm chamber between the lower surface of diaphragm and the valve body, the top of spool places diaphragm chamber, the bottom of spool places cavity, on the outer wall of valve body, be provided with the pressure signal mouth, pressure output and pressure introduction port, pressure introduction port communicates with described cavity by throttling pore, the pressure signal mouth is connected with diaphragm chamber, and relief opening and pressure output also all communicate with cavity.

Further improvement of the utility model is: the aperture of described throttling pore is 0.5-1.5mm.

The utility model compared with prior art has the following advantages: inverse proportion valve is that the suction valve that is used to control rotary air compressor realizes that stepless tolerance regulates, compare with the import inverse proportion valve that adopts in the market, energy-saving inverse proportion valve is not leak under air compressor normal load operating mode, by pressure introduction port throttling control throughput, and push down spool with diaphragm, again by spool control exhaust orifice open/close size, it is only in little without gas or gas consumption, a spot of pressurized air when being regulated, suction valve is just arranged to airborne release, and to account for total working time be a part seldom the time that air compressor needs tolerance to regulate, comparing import inverse proportion valve deflation time is exactly the total run time of air compressor, energy-saving inverse proportion valve is more energy-conservation, reduce expenses environmental protection.

Description of drawings:

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the another kind of embodiment's of the utility model a structural representation;

Number in the figure: 1-valve body, 2-valve seat, 3-relief opening, 4-spool, 5-valve gap, 6-upper spring seat, 7-lower spring cup, 8-adjusting screw, 9-screw, 10-diaphragm, 11-spring, 12-diaphragm chamber, 13-pressure signal mouth, 14-pressure output, 15-pressure introduction port, 16-cavity, 17-throttling pore, 18-through hole.

Embodiment:

In order to deepen understanding of the present utility model, the utility model is described in further detail below in conjunction with embodiment and accompanying drawing, and this embodiment only is used to explain the utility model, does not constitute the qualification to the utility model protection domain.

Show the embodiment of a kind of energy-saving inverse proportion valve of the utility model as Fig. 1, comprise valve body 1, the valve seat 2 of vertical placement is equipped with in valve body 1 bottom, be provided with a relief opening 3 in the valve seat 2, the upper end of valve seat 2 is provided with the spool 4 of vertical placement, there is a cavity 16 between the upper surface of valve seat 2 and the valve body 1, valve gap 5 is housed in the top of valve body 1, the top of valve gap 5 places the outside of valve body 1, and valve gap 5 is a hollow-core construction, be provided with upper spring seat 6 and lower spring cup 7 in the valve gap 5, upper spring seat 6 is connected with valve gap 5 by adjusting screw 8, lower spring cup 7 is fixedlyed connected with spool 4 by screw 9, lower surface at lower spring cup 7 is provided with diaphragm 10, between upper spring seat 6 and lower spring cup 7, be provided with spring 11, be provided with a diaphragm chamber 12 between the lower surface of diaphragm 10 and the valve body 1, the top of spool 4 places diaphragm chamber 12, the bottom of spool 4 places cavity 16, on the outer wall of valve body 1, be provided with pressure signal mouth 13, pressure output 14 and pressure introduction port 15, pressure introduction port 15 communicates with cavity 16 by throttling pore 17, the aperture of throttling pore 17 is 0.5-1.5mm, pressure signal mouth 13 is connected with diaphragm chamber 12, relief opening 3 and pressure output 14 also all communicate with cavity 16, or on the outer wall of valve body 1, be provided with pressure output 14 and pressure introduction port 15 as shown in Figure 2, pressure introduction port 15 communicates with cavity 16 by throttling pore 17, the aperture of throttling pore 17 is 0.5-1.5mm, and pressure introduction port 15 communicates with diaphragm chamber 12 by a through hole 18, be pressure introduction port 15 with diaphragm chamber 12 for inside communicates, relief opening 3 and pressure output 14 also all communicate with cavity 16.In use, the pressure signal of energy-saving inverse proportion valve is taken from barrel of oil and gas, the pressurized air of barrel of oil and gas enters pressure introduction port 15 by solenoid valve, pressure output 14 is connected to suction valve, when barrel of oil and gas pressure is lower than setting pressure, relief opening 3 is in sealing state always, delivery pressure equals incoming pressure, when setting pressure reaches setting pressure, diaphragm 10 drives spool 4 and upwards makes microdisplacement, relief opening 3 corresponding trace are opened, because in pressure when input, is by throttle orifice, so after relief opening 3 trace are opened, delivery pressure also just begins to descend, this moment, initiation pressure signal and delivery pressure were inverse relation, when pressure signal during less than setting pressure, output equals input again, inverse proportion valve is that the suction valve that is used to control rotary air compressor realizes that stepless tolerance regulates, the rotary air compressor air inlet adjustment can be two kinds of situations, a kind of is the control of on/off pattern, another kind is 0～100% stepless tolerance control, for big discharge capacity air compressor and need the little occasion of pressure surge will use step-less adjustment, the air compressor that uses stepless tolerance adjusting in the market probably accounts for 30%, inverse proportion valve is that the suction valve that is used to control rotary air compressor realizes that stepless tolerance regulates, compare with the import inverse proportion valve that adopts in the market, energy-saving inverse proportion valve is not leak under air compressor normal load operating mode, it is only in little without gas or gas consumption, and a spot of pressurized air is just arranged to airborne release when suction valve regulated, and to account for total working time be a part seldom the time that air compressor needs tolerance to regulate, comparing import inverse proportion valve deflation time is exactly the total run time of air compressor, energy-saving inverse proportion valve is more energy-conservation, reduce expenses environmental protection.

Claims (2)

1. energy-saving inverse proportion valve, comprise valve body (1), it is characterized in that: valve seat (2) is equipped with in described valve body (1) bottom, be provided with a relief opening (3) in the described valve seat (2), the upper end of described valve seat (2) is provided with spool (4), there is a cavity (16) between the upper surface of described valve seat (2) and the described valve body (1), valve gap (5) is housed in the top of described valve body (1), the top of described valve gap (5) places the outside of described valve body (1), and described valve gap (5) is a hollow-core construction, be provided with upper spring seat (6) and lower spring cup (7) in the described valve gap (5), described upper spring seat (6) is connected with described valve gap (5) by adjusting screw (8), described lower spring cup (7) is fixedlyed connected with described spool (4) by screw (9), lower surface at described lower spring cup (7) is provided with diaphragm (10), between described upper spring seat (6) and described lower spring cup (7), be provided with spring (11), be provided with a diaphragm chamber (12) between the lower surface of described diaphragm (10) and the described valve body (1), the top of described spool (4) places described diaphragm chamber (12), the bottom of described spool (4) places described cavity (16), on the outer wall of described valve body (1), be provided with pressure signal mouth (13), pressure output (14) and pressure introduction port (15), described pressure introduction port (15) communicates with described cavity (16) by throttling pore (17), described pressure signal mouth (13) is connected with described diaphragm chamber (12), and described relief opening (3) and described pressure output (14) also all communicate with described cavity (16).

2. according to the described a kind of energy-saving inverse proportion valve of claim 1, it is characterized in that: the aperture of described throttling pore (17) is 0.5-1.5mm.

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