Pilot-operated type bottleneck valve

Abstract

The pilot-operated type bottleneck valve comprises a valve block, a high-pressure air inlet, a low-pressure air outlet, a valve body, a valve cavity, a valve element and a valve seat, the valve element divides the valve cavity into an upper cavity and a lower cavity, a valve port is formed in the valve seat, a pilot-operated air channel is formed in the valve element, a communicating hole is formed in the side wall, where the lower cavity is located, of the valve body, and a pilot-operated sealing gasket and an armature are further arranged in the valve body; the pilot sealing gasket is installed at the bottom of the armature, a coil seat is arranged on the valve block, a coil and an iron core are arranged in the coil seat, a spring is arranged between the iron core and the armature, a lifting structure is arranged between the bottom of the armature and the valve core, a combination hole is formed in the bottom end face of the armature, and the pilot sealing gasket is clamped in the combination hole from bottom to top. According to the lifting structure, an inverted-T-shaped groove is formed in the top of the valve element, an annular convex edge is arranged on the side wall of the bottom of the armature, one side of the inverted-T-shaped groove is open, and the bottom of the armature is clamped into the inverted-T-shaped groove from the side face. The pilot-operated type bottleneck valve is high in reliability and easy to assemble.

Description

Technical Field

[0001] The invention relates to the field of valves, in particular to a pilot-operated bottle mouth valve. Background Art

[0002] Usually, the structure of a pilot-operated bottle-mouth valve includes: a valve block, on which a high-pressure air inlet and a low-pressure air outlet are arranged, the high-pressure air inlet is connected to a high-pressure air source, and the low-pressure air outlet is connected to an air-using end, a valve body is inserted in the valve block, a valve cavity is arranged in the valve body, a valve core is arranged in the valve cavity, the valve core divides the valve cavity into an upper chamber and a lower chamber, the upper chamber and the lower chamber can be connected through a gap between the valve core and the valve body, a valve seat is arranged at the bottom of the valve body, a valve port that can connect the low-pressure air outlet with the lower chamber is arranged on the valve seat, the valve port can be closed after the valve core moves downward, so that the low-pressure air outlet is not connected with the lower chamber, a pilot air channel that can connect the low-pressure air outlet with the upper chamber is arranged in the valve core, a connecting hole that can connect the high-pressure air inlet with the lower chamber is arranged on the side wall of the valve body where the lower chamber is located, and a valve located at The pilot sealing gasket above the valve core and the armature that can move up and down, the pilot sealing gasket is installed at the bottom of the armature, and the pilot sealing gasket can be sealed on the pilot airway when the armature moves downward. A coil seat is also provided on the valve block, and a coil and an iron core are provided in the coil seat. The coil ring is sleeved on the outside of the iron core, and the iron core is used to increase the electromagnetic force. The iron core is inserted at the top of the valve body and is located above the armature. A spring is provided between the iron core and the armature, and the two ends of the spring are respectively against the iron core and the armature. The spring can press the armature so that the pilot sealing gasket can be tightly sealed on the pilot airway. After the coil is energized, it can generate magnetic force to attract the armature, so that the armature can overcome the spring force and move upward. A lifting structure is provided between the bottom of the armature and the valve core, and the armature moves upward to make the pilot sealing gasket leave the pilot airway, and then the valve core can be lifted by the lifting structure. When the pilot bottle mouth valve needs to be opened, the coil is energized to generate magnetic force to attract the armature, so that the armature overcomes the spring force and moves upward, so that the pilot sealing gasket does not seal the pilot airway. At this time, the low-pressure air outlet can be connected to the upper chamber, so that the air pressure in the upper chamber can drop rapidly, thereby generating a pressure difference between the lower chamber and the upper chamber. In this way, under the pressure difference and the lifting effect of the armature, the valve core can be driven to move upward, so that the low-pressure air outlet and the high-pressure air inlet can be connected through the lower chamber.

[0003] The disadvantages of conventional pilot-operated bottle-mouth valves are as follows: (1) In order to install the pilot seal, the armature is composed of two parts. The structure of the armature is relatively complex and has poor consistency. During the assembly of the pilot seal, impurities that cannot be removed may fall into it. In addition, there is a risk of falling off in extreme cases. (2) The matching method of the armature and the valve core is relatively complex. Usually, the armature and the valve core are matched through pins in the design, that is, when the armature moves, the pin embedded in the armature will drive the valve core to move together. However, this method is difficult to process. It is necessary to drill small holes on the armature and the valve core respectively, and the accuracy is difficult to ensure. It is also difficult to control the pin when pressing it into the armature during assembly. It is difficult to ensure the depth and verticality of the pressing, and there is a risk of deformation or even breaking. In addition, once the installation is completed, the armature and the valve core cannot be disassembled and separated, which is not conducive to product verification and optimization. As the number of uses increases, the pin is also at risk of deformation or breakage. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a pilot-operated bottle mouth valve which is highly reliable and easy to assemble.

[0005] In order to solve the above problems, the technical solution adopted by the present invention is: a pilot bottle mouth valve, comprising: a valve block, a high-pressure air inlet and a low-pressure air outlet are arranged on the valve block, a valve body is inserted in the valve block, a valve cavity is arranged in the valve body, a valve core is arranged in the valve cavity, the valve core divides the valve cavity into an upper chamber and a lower chamber, a valve seat is arranged at the bottom of the valve body, a valve port that enables the low-pressure air outlet to communicate with the lower chamber is arranged on the valve seat, the valve port can be closed after the valve core moves downward, so that the low-pressure air outlet is not connected to the lower chamber, a pilot air channel that enables the low-pressure air outlet to communicate with the upper chamber is arranged in the valve core, and a valve port that enables the high-pressure air outlet to communicate with the lower chamber is arranged on the side wall of the valve body where the lower chamber is located. The connecting hole connected with the air inlet and the lower chamber, a pilot sealing gasket located above the valve core and an armature that can move up and down are also provided in the valve body, the pilot sealing gasket is installed at the bottom of the armature, and the pilot sealing gasket can be sealed on the pilot airway when the armature moves downward, a coil seat is also provided on the valve block, a coil and an iron core are provided in the coil seat, the coil ring is sleeved on the outside of the iron core, the iron core is inserted on the top of the valve body and is located above the armature, a spring is provided between the iron core and the armature, two ends of the spring are respectively against the iron core and the armature, the spring can press the armature so that the pilot sealing gasket can be tightly sealed on the pilot airway, and the coil can generate magnetic force to press the armature when it is energized The valve core is lifted by the lifting structure, and the valve core is lifted by the lifting structure after the pilot seal gasket leaves the pilot airway. The valve core is characterized in that: a combination hole is provided on the bottom end surface of the armature, and the combination hole is composed of a large hole and a small hole coaxially connected, the large hole is located above the small hole, and the lower end of the small hole is inverted with an oblique angle, the pilot seal gasket is composed of a large cylinder that can cooperate with the large hole and a small cylinder that can cooperate with the small hole coaxially connected, the large cylinder is located above the small cylinder, and the top of the large cylinder is inverted with an oblique angle, the pilot seal gasket is clamped in the combination hole from bottom to top, and the large cylinder is located above the small cylinder. When the cylinder passes through the small hole, it will undergo elastic deformation. After passing through the small hole, the large cylinder can recover and expand to be installed in the large hole. The bottom of the small cylinder is used to seal the pilot airway. The lifting structure is as follows: an inverted T-shaped groove is provided on the top of the valve core, and a circle of annular convex edges is provided on the bottom side wall of the armature. One side of the inverted T-shaped groove is open, so that the bottom of the armature can be inserted into the inverted T-shaped groove from the side, so that the annular convex edge can be inserted into the side groove of the inverted T-shaped groove. There is a gap between the annular convex edge and the top of the side groove, so that after the armature moves upward so that the pilot sealing gasket does not seal the pilot airway, the annular convex edge can lift the valve core by abutting against the top of the side groove.

[0006] Furthermore, in the aforementioned pilot-operated bottle-mouth valve, an exhaust hole for exhausting air when installing the pilot sealing gasket is provided on the armature on one side of the large hole.

[0007] Furthermore, in the aforementioned pilot-operated bottle-mouth valve, a top portion of the valve core is cut off in half to leave one side of the inverted T-shaped groove open.

[0008] The advantages of the present invention are as follows: the pilot-operated bottle-mouth valve optimizes the assembly method and structure of the armature and the pilot sealing gasket, so that the armature is composed of one part, so that the pilot sealing gasket can be easily installed and removed without disassembling the armature; in addition, the assembly method and structure of the armature and the valve core are optimized, so that the structure of the armature and the valve core becomes simple and reliable, so that the two are easy to assemble and the reliability is greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic structural diagram of the pilot-operated bottle mouth valve of the present invention.

[0010] Figure 2 This is a schematic diagram of the assembly of the armature and the valve core.

[0011] Figure 3 for Figure 1 Schematic diagram of the enlarged structure at point A in the middle. DETAILED DESCRIPTION

[0012] The present invention is further described in detail below in conjunction with specific embodiments and drawings.

[0013] like Figure 1 , Figure 2 , Figure 3As shown, the pilot-operated bottle-mouth valve comprises: a valve block 1, on which a high-pressure air inlet 2 and a low-pressure air outlet 3 are arranged, a valve body 4 is inserted in the valve block 1, a valve cavity is arranged in the valve body 4, a valve core 5 is arranged in the valve cavity, the valve core 5 divides the valve cavity into an upper chamber 6 and a lower chamber 7, a valve seat 8 is arranged at the bottom of the valve body 4, a valve port 9 that enables the low-pressure air outlet 3 to communicate with the lower chamber 7 is arranged on the valve seat 8, the valve port 9 can be closed after the valve core 5 moves downward, so that the low-pressure air outlet 3 is not connected with the lower chamber 7, a pilot airway 10 that enables the low-pressure air outlet 3 to communicate with the upper chamber 6 is arranged in the valve core 5, and a pilot airway 10 that enables the low-pressure air outlet 3 to communicate with the lower chamber 7 is arranged in the valve core 5, and a pilot airway 10 that enables the low-pressure air outlet 3 to communicate with the upper chamber 6 is arranged in the valve core 5. A connecting hole 11 is provided on the side wall of the valve body 4 where the chamber 7 is located, which enables the high-pressure air inlet 2 to communicate with the lower chamber 7. A pilot seal 12 located above the valve core 5 and an armature 13 that can move up and down are also provided in the valve body 4. The pilot seal 12 is installed at the bottom of the armature 13. After the armature 13 moves downward, the pilot seal 12 can be sealed on the pilot airway 10. A coil seat 14 is also provided on the valve block 1. A coil 15 and an iron core 16 are provided in the coil seat 14. The coil 15 is sleeved on the outside of the iron core 16. The iron core 16 is inserted at the top of the valve body 4 and is located above the armature 13. Between the iron core 16 and the armature 13 A spring 17 is arranged between the two ends of the spring 17, which respectively abut against the iron core 16 and the armature 13. The spring 17 can press the armature 13 so that the pilot seal 12 can be tightly sealed on the pilot airway 10. After the coil 15 is energized, it can generate a magnetic force to attract the armature 13, so that the armature 13 can overcome the elastic force of the spring 17 and move upward. A lifting structure is arranged between the bottom of the armature 13 and the valve core 5. After the armature 13 moves upward and the pilot seal 12 leaves the pilot airway 10, the valve core 5 can be lifted by the lifting structure. A combination hole is arranged on the bottom end surface of the armature 13, and the combination hole is composed of a large hole 18 and a The small hole 19 is coaxially connected, the large hole 18 is located above the small hole 19, and the lower end of the small hole 19 has an inverted bevel. The pilot sealing gasket 12 is coaxially connected by a large cylinder 20 that can cooperate with the large hole 18 and a small cylinder 21 that can cooperate with the small hole 19. The large cylinder 20 is located above the small cylinder 21, and the top of the large cylinder 20 has an inverted bevel. The pilot sealing gasket 12 is clamped in the combination hole from bottom to top. When the large cylinder 20 passes through the small hole 19, it will undergo elastic deformation. After passing through the small hole 19, the large cylinder 20 can recover and expand and be clamped in the large hole 18. The bottom of the small cylinder 21 is used to cover the pilot airway 10.

[0014] In this embodiment, the lifting structure is as follows: an inverted T-shaped groove 22 is provided on the top of the valve core 5, and a circle of annular convex edges 23 are provided on the bottom side wall of the armature 13. One side of the inverted T-shaped groove 22 is open, so that the bottom of the armature 13 can be inserted into the inverted T-shaped groove 22 from the side, so that the annular convex edge 23 can be inserted into the side groove of the inverted T-shaped groove 22. In this embodiment, half of the top of the valve core 5 is cut off to make one side of the inverted T-shaped groove 22 open; there is a gap between the annular convex edge 23 and the top of the side groove, so that after the armature 13 moves upward so that the pilot sealing gasket 12 does not seal the pilot airway 10, the annular convex edge 23 can lift the valve core 5 by abutting against the top of the side groove.

[0015] An exhaust hole 24 for exhausting air when the pilot seal 12 is installed is provided on the armature 13 on one side of the large hole 18. This arrangement makes it convenient for the pilot seal 12 to be inserted into the combination hole.

Claims

1. Pilot operated bottle mouth valve, including: A valve block is provided with a high-pressure air inlet and a low-pressure air outlet on the valve block, a valve body is inserted in the valve block, a valve cavity is provided in the valve body, a valve core is provided in the valve cavity, the valve core divides the valve cavity into an upper chamber and a lower chamber, a valve seat is provided at the bottom of the valve body, a valve port that enables the low-pressure air outlet to communicate with the lower chamber is provided on the valve seat, the valve port can be closed after the valve core moves downward, so that the low-pressure air outlet is not connected with the lower chamber, a pilot air channel that enables the low-pressure air outlet to communicate with the upper chamber is provided in the valve core, a connecting hole that enables the high-pressure air inlet to communicate with the lower chamber is provided on the side wall of the valve body where the lower chamber is located, and a position The pilot sealing gasket above the valve core and the armature that can move up and down, the pilot sealing gasket is installed at the bottom of the armature, and the armature can make the pilot sealing gasket seal on the pilot airway when it moves downward. A coil seat is also provided on the valve block, and a coil and an iron core are provided in the coil seat. The coil ring is sleeved on the outside of the iron core, and the iron core is inserted on the top of the valve body and is located above the armature. A spring is provided between the iron core and the armature, and the two ends of the spring are respectively against the iron core and the armature. The spring can press the armature so that the pilot sealing gasket can be tightly sealed on the pilot airway. When the coil is energized, it can generate magnetic force to attract the armature, so that the armature can overcome the elastic force of the spring. The valve core is lifted by the lifting structure after the pilot seal leaves the pilot airway, and the feature is that a combination hole is provided on the bottom end face of the armature, the combination hole is composed of a large hole and a small hole connected coaxially, the large hole is located above the small hole, and the lower end of the small hole has an inverted bevel, the pilot seal is composed of a large cylinder that can cooperate with the large hole and a small cylinder that can cooperate with the small hole, which are coaxially connected, the large cylinder is located above the small cylinder, and the top of the large cylinder has an inverted bevel, the pilot seal is clamped in the combination hole from bottom to top, and when the large cylinder passes through the small hole Elastic deformation will occur, and the large cylinder can recover and expand and be installed in the large hole after passing through the small hole, and the bottom of the small cylinder is used to seal the pilot airway; the lifting structure is: an inverted T-shaped groove is arranged on the top of the valve core, and a circle of annular convex edge is arranged on the bottom side wall of the armature, and one side of the inverted T-shaped groove is opened, so that the bottom of the armature can be inserted into the inverted T-shaped groove from the side, so that the annular convex edge can be inserted into the side groove of the inverted T-shaped groove, and there is a gap between the annular convex edge and the top of the side groove, so that after the armature moves upward so that the pilot sealing gasket does not seal the pilot airway, the annular convex edge can lift the valve core by abutting against the top of the side groove.

2. The pilot operated bottle mouth valve according to claim 1, characterized in that: An exhaust hole for exhausting air when installing a pilot seal is provided on the armature on the large hole side.

3. The pilot operated bottle mouth valve according to claim 1, characterized in that: The top of the valve core is cut in half to leave one side of the inverted T-shaped groove open.

Images