CN209483978U - Pneumatic pinch valve - Google Patents

Abstract

The utility model discloses pneumatic pinch valves, including shell, rubber pinch pipe is equipped in shell, rubber pinch pipe and shell are coaxially disposed, rubber pinch pipe and housing central section are formed with gas chamber, housing sidewall offers venthole, rubber pinch pipe is connected with inner sleeve, rubber pinch pipe is arranged between inner sleeve and shell, and the both ends of shell are connected with end cap, and inner sleeve is butted on end cap, the both ends of shell are equipped with internal screw thread, end cap outer wall is equipped with the first thread segment and the second thread segment side by side, and axial gap is formed between the first thread segment and the second thread segment, is arranged between the two lead-in angle in difference.The utility model has the following advantages that and effect: being installed on shell by the way of the first thread segment and the second thread segment are arranged on end cap, lock knob square is produced under the cooperation of the first thread segment and the second thread segment, to effectively improve the stability of end cap position, end cap is avoided to loosen；It can make the fast quick-recovery of rubber pinch pipe using wire rings, realize circulation.

Description

Pneumatic pinch valve

Technical field

The utility model relates to valve technology field, in particular to pneumatic pinch valve.

Background technique

Pneumatic pinch valve is in metallurgy, chemical industry, cement, ceramics, glass, plastics, wastewater treatment, pharmacy, food and drink, wine Relatively broad, resistance to particle erosion is used in the industries such as wine, railway, aviation, machinery, it is mixed mainly for delivery of the solid-liquid containing fiber Close object.High-speed rail, aircraft vacuum closet in it is especially common.

The Chinese patent of existing Patent No. CN104712787A discloses self-sealing pneumatic pinch valve, including electromagnetic switch Valve, fastener, flange, rubber pinch pipe, valve casing, gas chamber clapboard, gas chamber；Solenoid directional control valve is mounted on valve casing；Flange and valve casing It is connected by fasteners such as bolts；The both ends of rubber pinch pipe are stuck between gas chamber clapboard and flange；Gas chamber is by rubber pinch pipe, valve casing It surrounds and forms with gas chamber clapboard.

But above-mentioned self-sealing pneumatic pinch valve has the disadvantage in that due to the impacting with high pressure effect by fluid media (medium), adds High-speed rail, aircraft inevitably generate some shakes in the process of moving, after long-term work be easy so that being anchored on flange On screw there is loose phenomenon, the effect that is stuck in rubber pinch pipe between gas chamber clapboard and flange is deteriorated, or even presss from both sides in rubber Its both ends can be detached between gas chamber clapboard and flange in pipe telescopic process.

Utility model content

The purpose of the utility model is to provide pneumatic pinch valves, are in first that difference is arranged using lead-in angle is arranged on end cap The mode of thread segment and the second thread segment is installed on shell, there is end cap to firmly install, steady effect.

The above-mentioned technical purpose of the utility model has the technical scheme that pneumatic pinch valve, including Shell equipped with channel is provided with rubber pinch pipe in shell, and rubber pinch pipe and shell are coaxially disposed, rubber pinch pipe both ends and shell It is close to, and is formed with gas chamber between rubber pinch pipe and shell, housing sidewall offers the venthole for being connected to gas chamber, rubber pinch pipe Both ends inner thread is connected with inner sleeve, and rubber pinch pipe is arranged between inner sleeve and shell, and the both ends of shell are threaded with end cap, Inner sleeve is butted on the end face of end cap, and the both ends of shell offer internal screw thread, the outer wall of end cap be set side by side with respectively with internal screw thread pair The first thread segment and the second thread segment that should cooperate, are formed with axial gap between the first thread segment and the second thread segment, and It is arranged between the lead-in angle of first thread segment and the lead-in angle of the second thread segment in difference.

By using above-mentioned technical proposal, when assembling pneumatic pinch valve, first rubber pinch pipe is installed in the channel of shell, Then two inner sleeves are connected through a screw thread the both ends for being connected to rubber pinch pipe, rigid inner sleeve can play support to rubber pinch pipe The both ends of rubber pinch pipe are clamped between shell and inner sleeve by squeezing action, then end cap is connected to shell both ends, work as end cap It can stop turning when pushing against positioned at the intracorporal one end of shell with inner sleeve；During installing end cap, the first thread segment screws in shell After interior, when the second thread segment will screw in shell, since the lead-in angle of two thread segments is different, and two thread segments it Between be formed with axial gap so that along the first thread segment direction slight deformation can occur for the second thread segment, in this way, when the first screw thread After section screws in shell with the second thread segment, it can be generated under the first thread segment and the mating reaction of the second thread segment a certain amount of Self-locking torque avoid end cap because of shake effect and loose phenomenon occur, improve so that the position of end cap be effectively ensured The stability of working performance.

The utility model is further arranged to: several wire rings are coaxially arranged in rubber pinch pipe.

By using above-mentioned technical proposal, when pneumatic pinch valve is in working condition, venthole is passed through gas into gas chamber, Increase the indoor pressure of gas, pressurization is generated to rubber pinch pipe, draws close it to center, blocking effect is realized, works as gas chamber When interior pressure restores to normal pressure, since wire rings have memory sexual function, under the action of wire rings, rubber pinch pipe can be fast To as former state, circulation medium can circulate out of rubber pinch pipe quick-recovery again again.

The utility model is further arranged to: rubber pinch pipe is located at the indoor outer wall of gas and is set as to rubber pinch pipe center The cambered surface of line indent.

By using above-mentioned technical proposal, the cambered surface of indent is set as in the middle part of rubber pinch pipe, when being passed through gas in gas chamber When carrying out squeezing force to rubber pinch pipe, cambered surface has certain guiding performance, can radially collapse to center convenient for rubber pinch pipe.

The utility model is further arranged to: the outer wall of rubber pinch pipe circumferentially offers annular groove, inner walls week To the bulge loop being provided in annular groove.

By using above-mentioned technical proposal, after rubber pinch pipe is penetrated in shell, annular groove can be embedded in by bulge loop To rubber pinch pipe Primary Location, and to when the stretching of middle part after rubber pinch pipe compressive deformation, bulge loop can press from both sides rubber interior mode Certain barrier effect is played at the both ends of pipe, improves the stability at rubber pinch pipe both ends, it is made to be not easy to take off between inner sleeve and shell From.

The utility model is further arranged to: end cap includes first step and second step, first step and inner sleeve It offsets, second step offsets with shell end face.

By using above-mentioned technical proposal, end cap carries out axial restriction relative to the position of shell to rubber pinch pipe, when the One step be butted in when putting on, second step is butted on shell just, can avoid end cap to a certain extent and be screwed into excessively to cause Inner sleeve is squeezed and deformed.

In conclusion the utility model has the following beneficial effects:

1. being installed on shell in such a way that lead-in angle on end cap is in the first thread segment and the second thread segment of difference setting On, a certain amount of self-locking torque is generated under the mating reaction of the first thread segment and the second thread segment, to effectively increase end The stability of lid position avoids end cap because of shake effect and loose phenomenon occurs；

2. rubber pinch pipe fast quick-recovery when using wire rings that can make recovery to normal pressure in gas chamber in rubber pinch pipe is realized Circulation.

Detailed description of the invention

Fig. 1 is the external overall structure diagram of embodiment.

Fig. 2 is the schematic diagram of internal structure of Section A-A in Fig. 1.

In figure: 1, shell；11, venthole；12, bulge loop；13, internal screw thread；2, rubber pinch pipe；21, annular groove；3, gas Room；4, inner sleeve；5, end cap；51, first step；52, second step；53, the first thread segment；54, the second thread segment；6, between axial direction Gap；7, cambered surface；8, wire rings.

Specific embodiment

The utility model will be further described below with reference to the accompanying drawings.

Pneumatic pinch valve includes the internal axial shell 1 for opening up channel, is provided in shell 1 as depicted in figs. 1 and 2 Rubber pinch pipe 2, rubber pinch pipe 2 and shell 1 are coaxially disposed, and 2 both ends of rubber pinch pipe are close to shell 1,2 outer wall of rubber pinch pipe and shell It is formed with gas chamber 3 between 1 inner wall of body, offers the venthole 11 for being connected to gas chamber 3 in the middle part of 1 side wall of shell；The both ends of rubber pinch pipe 2 The mode that inner wall is connected through a screw thread is connected with inner sleeve 4, and the both ends of rubber pinch pipe 2 are arranged between inner sleeve 4 and shell 1, shell 1 Both ends be threaded with end cap 5, end cap 5 includes first step 51 and second step 52, first step 51 and 4 phase of inner sleeve It supporting, second step 52 and the end face of shell 1 offset, and rubber pinch pipe 2 circumferentially offers annular groove 21 on the outer wall of close end, 1 inner wall of shell is circumferentially provided with the bulge loop 12 in annular groove 21.

As shown in Fig. 2, the both ends of shell 1 offer internal screw thread 13, the outer wall of end cap 5 be set side by side with respectively with internal screw thread The first thread segment 53 and the second thread segment 54 of 13 corresponding matchings, are formed with axis between the first thread segment 53 and the second thread segment 54 It is arranged to gap 6, and between the lead-in angle of the first thread segment 53 and the lead-in angle of the second thread segment 54 in difference, the present embodiment In, the axial gap 6 that is formed between the first thread segment 53 and the second thread segment 54 is 5mm, the lead-in angle of the first thread segment 53 with Difference between the lead-in angle of second thread segment 54 is 5 degree.

When assembling pneumatic pinch valve, first rubber pinch pipe 2 is installed in the channel of shell 1, is penetrated when rubber pinch pipe 2 It, can be by mode of the bulge loop 12 in annular groove 21 to 2 Primary Location of rubber pinch pipe, then in two after in shell 1 Set 4 is threadingly attached to the both ends of rubber pinch pipe 2, and rigid inner sleeve 4 can play support squeezing action to rubber pinch pipe 2, will The both ends of rubber pinch pipe 2 are clamped between shell 1 and inner sleeve 4, then end cap 5 is connected to 1 both ends of shell, and end cap 5 is to rubber Clamp 2 carries out axial restriction relative to the position of shell 1, and when first step 51 is butted in inner sleeve 4, second step 52 supports just In on shell 1, can stopping turning end cap 5 at this time, it can avoid end cap 5 to a certain extent and be screwed into excessively inner sleeve 4 to be caused to squeeze Deformation.

During installing end cap 5, after the first thread segment 53 screws in shell 1, when the second thread segment 54 will screw in When in shell 1, since the lead-in angle of two thread segments is different, and it is formed with axial gap 6 between two thread segments, so that the Along 53 direction of the first thread segment slight deformation can occur for two thread segments 54, in this way, when the first thread segment 53 and the second thread segment 54 After screwing in shell 1, it can be generated under the mating reaction of the first thread segment 53 and the second thread segment 54 a certain amount of from lock knob Square avoids end cap 5 because of shake effect and loose phenomenon occurs, improve workability so that the position of end cap 5 be effectively ensured The stability of energy.

As shown in Fig. 2, the cambered surface 7 to 2 center line indent of rubber pinch pipe is set as in the middle part of rubber pinch pipe 2, in rubber pinch pipe 2 Several wire rings 8 are coaxially arranged with, when pneumatic pinch valve is in working condition, through-hole is passed through gas into gas chamber 3, makes gas Pressure in room 3 increases, and generates squeezing action to rubber pinch pipe 2, the middle part of rubber pinch pipe 2 is set as the cambered surface 7 of indent, cambered surface 7 have certain guiding performance, can radially collapse to center convenient for rubber pinch pipe 2, realize fluid blocking effect, rubber presss from both sides at this time It is stretched after 2 compressive deformation of pipe to middle part, 2 both ends of rubber pinch pipe are not easy due to the barrier effect by bulge loop 12 from inner sleeve 4 and shell It is detached between 1, has the effect of high stability；When pressure restores to normal pressure in gas chamber 3, since wire rings 8 have memory Sexual function, under the action of wire rings 8, rubber pinch pipe 2 can to as former state, circulation medium can be pressed from both sides from rubber quick-recovery again again fastly Circulation in pipe 2.

The above description is only a preferred embodiment of the present invention, therefore all according to described in the utility model patent application range The equivalent change or modification done of structure, feature and principle, be included in the scope of the utility model patent application.

Claims (5)

1. pneumatic pinch valve, the shell (1) including being equipped with channel, the shell (1) is interior to be provided with rubber pinch pipe (2), the rubber Plastic clip pipe (2) and the shell (1) are coaxially disposed, and rubber pinch pipe (2) both ends are close to the shell (1), and the rubber It is formed between plastic clip pipe (2) and the shell (1) gas chamber (3), shell (1) side wall, which offers, is connected to the gas chamber (3) Venthole (11), it is characterised in that: the both ends inner thread of the rubber pinch pipe (2) is connected with inner sleeve (4), rubber folder Pipe (2) is arranged between the inner sleeve (4) and the shell (1), and the both ends of the shell (1) are threaded with end cap (5), institute The end face that inner sleeve (4) is butted on the end cap (5) is stated, the both ends of the shell (1) offer internal screw thread (13), the end cap (5) Outer wall be set side by side with the first thread segment (53) and the second thread segment (54) with the internal screw thread (13) corresponding matching respectively, It is formed with axial gap (6) between first thread segment (53) and second thread segment (54), and first screw thread It is arranged between the lead-in angle of section (53) and the lead-in angle of second thread segment (54) in difference.

2. pneumatic pinch valve according to claim 1, it is characterised in that: the rubber pinch pipe (2) is if interior be coaxially arranged with Dry wire rings (8).

3. pneumatic pinch valve according to claim 1, it is characterised in that: the rubber pinch pipe (2) is located at the gas chamber (3) Interior outer wall is set as the cambered surface (7) to the rubber pinch pipe (2) center line indent.

4. pneumatic pinch valve according to claim 1, it is characterised in that: the outer wall of the rubber pinch pipe (2) circumferentially opens up Have annular groove (21), shell (1) inner wall is circumferentially provided with the bulge loop (12) in the annular groove (21).

5. pneumatic pinch valve according to claim 1, it is characterised in that: the end cap (5) includes first step (51) With second step (52), the first step (51) offsets with the inner sleeve (4), the second step (52) and the shell (1) end face offsets.