CN111828294A - A piston intermediate - Google Patents

Abstract

A piston type intermediate body is used for a pneumatic diaphragm pump and comprises a main body, a central shaft, a first piston, a second piston, a thimble and an air valve, wherein a cylindrical first cavity and a cylindrical second cavity are symmetrically arranged on two sides of the main body, a central through hole is formed in the center of the main body along the axis to communicate the first cavity with the second cavity, a first sealing ring mounting groove is further formed in the side wall of the central through hole, and a first sealing ring is mounted in the first sealing ring mounting groove; the central shaft is arranged in the central through hole and seals the central shaft and the main body through a first sealing ring; the two ends of the central shaft are also symmetrically provided with a first piston and a second piston, and the first piston, the second piston and the central shaft can slide left and right relative to the main body simultaneously; a thimble mounting hole is arranged on the main body, is parallel to the central through hole and deviates from a set distance; an air valve is further mounted outside the main body.

Description

A piston intermediate

technical field

The present invention relates to an intermediate, more precisely a piston-type intermediate for pneumatic diaphragm pumps.

Background technique

The intermediate body used in the current pneumatic diaphragm pump has a complex internal structure and a large air storage space, and the driving gas directly acts on the diaphragm side of the pneumatic diaphragm pump after passing through the intermediate body. When the diaphragm is fatigued and damaged, the conveyed material passes through the intermediate body. Direct leakage to the outside of the pneumatic diaphragm pump will cause environmental pollution, and because of the large air storage space inside the intermediate body, the air consumption during operation is large and the use cost is high.

SUMMARY OF THE INVENTION

Due to the above problems of the prior art, the present invention provides a piston-type intermediate, which can effectively solve the above problems.

The technical solution adopted by the present invention to solve the above-mentioned technical problems is to provide a piston-type intermediate, which is used in a pneumatic diaphragm pump, including a main body, a central shaft, a piston 1, a piston 2, a thimble, and a gas valve, and the main body is symmetrical on both sides. There are cylindrical cavity 1 and cavity 2, and the center of the main body is provided with a central through hole along the axis to connect cavity 1 and cavity 2. The side wall of the central through hole is also provided with a sealing ring installation groove 1. A sealing ring 1 is installed in the ring mounting groove 1; the central shaft is installed in the central through hole and the central shaft and the main body are sealed by the sealing ring 1; the two ends of the central shaft are also symmetrically installed with a piston 1 and a piston 2 and the piston The first and second pistons and the central shaft can slide left and right relative to the main body at the same time; the first and second pistons are placed in the first and second chambers respectively, and the first and second chambers are divided into a detection chamber 1 and an air chamber 1, detection chamber 2 and air chamber 2; the main body is provided with a thimble mounting hole parallel to the central through hole and deviated from the set distance; an air valve is also installed outside the main body.

Further, the thimble installation hole communicates the cavity 1 and cavity 2 on both sides of the main body; the thimble installation hole is installed with a thimble; the outer wall of the thimble is provided with a sealing ring installation groove 2; the sealing ring installation groove A sealing ring is installed in the second to seal the thimble and the thimble installation hole, and the thimble can slide left and right in the thimble installation hole.

Further, both ends of the thimble mounting hole are further provided with a counterbore 1 and a counterbore 2 with a diameter larger than the diameter of the thimble mounting hole.

Further, the two ends of the cylindrical surface of the central shaft are provided with stepped surfaces with a set length and a diameter smaller than the diameter of the middle part of the central shaft; the first piston and the second piston are also provided with inner holes along the axis, and the inner holes are respectively It is installed on the stepped surfaces at both ends of the central shaft, and a sealing ring is installed between the inner hole and the stepped surface to seal the inner hole and the stepped surface; the end faces of the two ends of the central shaft are also provided with threaded holes.

Further, the outer walls of the first piston and the second piston are provided with a third sealing ring installation groove, and a third sealing ring is installed in the third sealing ring installation groove to seal the first piston and the second piston with the inner walls of the first cavity and the second cavity respectively. .

Further, the main body is also provided with a detection hole 1 and a detection hole 2, the detection hole 1 communicates the detection chamber 1 with the detection chamber 2, and the detection hole 2 communicates the detection hole 1 with the outside of the main body side wall.

Further, a feedback hole 1 and a feedback hole 2, an exhaust hole, a driving hole 1, a driving hole 2, and a mounting hole are provided outside the main body; the feedback hole 1, the feedback hole 2, and the exhaust hole are connected to the thimble mounting hole. The inner wall is communicated with the thimble mounting hole and the exhaust hole is located in the middle of the feedback hole 1 and the feedback hole 2; the driving hole 1 and the driving hole 2 are respectively connected to the air chamber 1 and the air chamber 2 on both sides of the main body.

The beneficial effects of the present invention are as follows: the piston-type intermediate body provided by the present invention is symmetrically provided with cylindrical cavity 1 and cavity 2 on both sides of the main body, and a piston 1 and a piston are also symmetrically installed on both ends of the central axis Second, the chamber 1 and chamber 2 are divided into detection chamber 1, air chamber 1, detection chamber 2, and air chamber 2, which greatly reduces the air storage space of the intermediate body, significantly reduces air consumption during operation, saves energy and reduces operating costs.

Description of drawings

The present invention will be further described below with reference to the accompanying drawings and embodiments.

Fig. 1 is the outline schematic diagram of the main body and air valve of the present invention;

Fig. 2 is the sectional schematic diagram of the present invention;

Fig. 3 is the main body of the present invention and the sectional schematic diagram of sealing ring one;

Fig. 4 is the sectional schematic diagram of the central axis of the present invention;

5 is a schematic cross-sectional view of a piston one, a seal ring three, and a seal ring four of the present invention;

Fig. 6 is the sectional schematic diagram of thimble of the present invention and sealing ring two;

Fig. 7 is the sectional schematic diagram of the thimble mounting hole of the present invention;

FIG. 8 is a front view of the main body of the present invention.

Detailed ways

The specific embodiments of the present invention are further described below in conjunction with the accompanying drawings:

As shown in Figure 1, Figure 2, Figure 3, the present invention provides a piston-type intermediate, which is used in a pneumatic diaphragm pump, including a main body 1, a central shaft 12, a piston one 10, a piston two 11, a thimble 13, a gas The valve 20, the main body 1 is provided with cylindrical cavity 1 2 and cavity 2 3 symmetrically on both sides, and the center of the main body 1 is provided with a central through hole 4 along the axis to communicate the cavity 1 2 and cavity 2 3, the center The side wall of the through hole 4 is also provided with a sealing ring installation groove 1 5, and a sealing ring 1 6 is installed in the sealing ring installation groove 1 5; The central shaft 12 and the main body 1 are sealed; the two ends of the central shaft 12 are also symmetrically installed with a piston one 10 and a piston two 11, and the piston one 10 and the piston two 11 and the central shaft 12 can slide left and right relative to the main body 1 at the same time; the piston The first 10 and the second piston 11 are respectively placed in the first cavity 2 and the second cavity 3, and the first cavity 2 and the second cavity 3 are divided into the detection chamber 1 2B, the air chamber 1 2A, the detection chamber 2 3B, and the air chamber 2. 3A; the main body 1 is provided with a thimble mounting hole 7 parallel to the central through hole 4 and deviated from the set distance; an air valve 20 is also installed outside the main body 1 .

As shown in FIGS. 2 , 3 and 6 , the thimble mounting hole 7 connects the cavity 1 2 and the cavity 2 3 on both sides of the main body 1 ; the thimble 13 is installed in the thimble mounting hole 7 ; the thimble The outer wall of 13 is provided with a second sealing ring installation groove 131; a second sealing ring 132 is installed in the second sealing ring installation groove 131 to seal the thimble 13 and the thimble installation hole 7, and the thimble 13 can slide left and right in the thimble installation hole 7.

As shown in FIG. 7 , both ends of the thimble mounting hole 7 are further provided with a counterbore 1 71 and a counterbore 72 with a diameter larger than the diameter of the thimble mounting hole 7 .

As shown in FIGS. 2 , 4 and 5 , both ends of the cylindrical surface of the central shaft 12 are provided with stepped surfaces 122 with a set length and a diameter smaller than the diameter of the middle part of the central shaft 12 ; the piston one 10 and the piston two 11. There are also inner holes 104 along the axis. The inner holes 104 are respectively installed on the stepped surfaces 122 at both ends of the central shaft 12. A sealing ring 103 is also installed between the inner hole 104 and the stepped surfaces 122 to seal the inner holes 104. It is sealed with the step surface 122; the end surfaces of the two ends of the central shaft 12 are also provided with threaded holes 121.

As shown in Figure 2, Figure 3, Figure 5, the outer walls of the piston one 10 and the piston two 11 are provided with a sealing ring installation groove three 101, and a sealing ring three 102 is installed in the sealing ring installation groove three 101 to install the piston one 10. The second piston 11 is sealed with the inner walls of the first cavity 2 and the second cavity 3 respectively.

As shown in FIG. 2 and FIG. 3 , the main body 1 is further provided with a detection hole 1 8 and a detection hole 2 9. The detection hole 1 8 communicates the detection chamber 1 2B with the detection chamber 2 3B, and the detection hole 2 9. Connect the detection hole one 8 to the outside of the side wall of the main body 1.

As shown in FIG. 2, FIG. 3, and FIG. 8, the main body 1 is provided with a feedback hole 1 201 and a feedback hole 2 202, an exhaust hole 203, a driving hole 1 204, a driving hole 2 205, and a mounting hole 206. The first feedback hole 201, the second feedback hole 202, and the exhaust hole 203 are connected to the inner wall of the thimble mounting hole 7 and communicate with the thimble mounting hole 7, and the exhaust hole 203 is located in the middle position of the feedback hole one 201 and the second feedback hole 202; the drive The first hole 204 and the second driving hole 205 are respectively connected to the air chamber 1 2A and the air chamber 2 3A on both sides of the main body 1 .

The working process of the present invention includes: the compressed air enters the air chamber 1 2A on one side of the main body 1 from the air valve 20 to push the piston 1 10 and drive the central axis 12 to move in a direction deviating from the main body 1. At this time, the second piston 11 is on the central axis 12. It moves towards the direction close to the main body 1 under the driving force of the piston 2. When the movement reaches the set distance, the ejector pin 13 slides in the ejector pin mounting hole 7 under the impact of the piston 2 11 and switches the direction of the gas entering the air valve 20 so that the air valve 20 is reversed. , so that the compressed air enters the second air chamber 3A and the compressed air in the first air chamber 2A is discharged through the air valve 20. When the compressed air enters the second air chamber 3A, the above actions are performed in the opposite direction, and the cycle is repeated.

A piston-type intermediate body provided by the present invention is symmetrically provided with a cylindrical cavity 1 2 and a cylindrical cavity 2 3 on both sides of the main body 1 , and a piston 1 10 and a piston 2 11 are symmetrically installed on both ends of the central axis 12 The cavity 1 2 and cavity 2 3 are divided into detection chamber 1 2B, air chamber 1 2A, detection chamber 2 3B, and air chamber 2 3A, which greatly reduces the air storage space of the intermediate body, and the gas consumption during operation is significantly reduced. Energy saving reduces operating costs.

The above descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention. within.

Claims (7)

1. a piston type intermediate, it is used for pneumatic diaphragm pump, comprises main body, central axis, piston one, piston two, thimble, air valve, it is characterized in that, described main body is symmetrically provided with cylindrical cavity on both sides 1 and cavity 2 and the center of the main body is provided with a central through hole along the axis to connect cavity 1 and cavity 2, the side wall of the central through hole is also provided with a sealing ring installation groove 1, and the sealing ring installation groove 1 is installed in Sealing ring 1; the central shaft is installed in the central through hole and seals the central shaft and the main body through the sealing ring 1; the two ends of the central shaft are also symmetrically installed with piston 1 and piston 2, and piston 1, piston 2 and central shaft Can slide left and right relative to the main body at the same time; the piston 1 and the piston 2 are respectively placed in the cavity 1 and the cavity 2, and the cavity 1 and the cavity 2 are divided into a detection chamber 1, an air chamber 1 and a detection chamber 2, an air chamber Chamber 2; the main body is provided with a thimble mounting hole parallel to the central through hole and deviated from the set distance; an air valve is also installed outside the main body. 2 . The piston-type intermediate body according to claim 1 , wherein the thimble mounting hole connects the cavity 1 and cavity 2 on both sides of the main body; the thimble mounting hole is installed with a thimble; the thimble The outer wall is provided with a second sealing ring installation groove; the second sealing ring installation groove is installed with a second sealing ring to seal the thimble and the thimble installation hole, and the thimble can slide left and right in the thimble installation hole. 3 . The piston-type intermediate according to claim 1 or 2 , wherein the two ends of the thimble mounting hole are further provided with a counterbore 1 and a counterbore 2 with a diameter larger than the diameter of the thimble mounting hole. 4 . 4. The piston-type intermediate body according to claim 1, wherein the two ends of the cylindrical surface of the central axis are provided with stepped surfaces with a set length and a diameter smaller than the diameter of the middle part of the central axis; The second piston is also provided with an inner hole along the axis, and the inner hole is respectively installed on the stepped surfaces at both ends of the central shaft, and a sealing ring is also installed between the inner hole and the stepped surface to seal the inner hole and the stepped surface; The end faces of both ends of the central shaft are also provided with threaded holes. 5. The piston-type intermediate according to claim 1, wherein the outer walls of the first piston and the second piston are provided with a third sealing ring installation groove, and the third sealing ring installation groove 1. Piston 2 is sealed with the inner walls of cavity 1 and cavity 2 respectively. 6. The piston-type intermediate according to claim 1, wherein the main body is further provided with a detection hole 1 and a detection hole 2, and the detection hole 1 communicates the detection chamber 1 with the detection chamber 2, and the detection hole 1 communicates with the detection chamber 2. The second detection hole communicates the first detection hole with the outside of the side wall of the main body. 7 . The piston-type intermediate according to claim 1 , wherein the main body is provided with a feedback hole 1 and a feedback hole 2, an exhaust hole, a driving hole 1 and a driving hole 2, and a mounting hole; The first hole, the second feedback hole, and the exhaust hole communicate with the inner wall of the thimble mounting hole and communicate with the thimble mounting hole, and the exhaust hole is located in the middle position of the first feedback hole and the second feedback hole; the driving hole 1 and the driving hole 2 are respectively connected to Air chamber 1 and air chamber 2 on both sides of the main body.

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