CN212616322U

CN212616322U - Exhaust opening and closing device of ductile cast iron pipe hydraulic press

Info

Publication number: CN212616322U
Application number: CN202021080334.1U
Authority: CN
Inventors: 张国生; 张永杰; 闫海峰; 梅燕娜; 王志刚
Original assignee: Guangdong Xinxing Ductile Iron Pipes Co ltd
Current assignee: Guangdong Xinxing Ductile Iron Pipes Co ltd
Priority date: 2020-06-12
Filing date: 2020-06-12
Publication date: 2021-02-26
Anticipated expiration: 2030-06-12

Abstract

The utility model discloses a nodular cast-iron pipe hydraulic press exhaust headstock gear relates to nodular cast-iron pipe production technical field. The valve comprises a valve seat, wherein a medium inlet pipe is arranged in the valve seat in a manner of penetrating through the bottom of the valve seat, a base with a hollow inner part is fixedly arranged on the upper part of the valve seat, a hydraulic cylinder is fixedly arranged above the base, a connecting piece is fixedly arranged at the end part of an output shaft of the hydraulic cylinder, the middle of the bottom of the connecting piece is inwards sunken into a spherical arc shape, a valve core rod is arranged in the spherical arc shape in a matched manner, a snap ring is fixedly arranged on the top end face of the valve core rod, the snap ring is fixedly connected with the periphery of the connecting piece, the valve core rod penetrates through a through hole in. The utility model discloses can guarantee the direction requirement of case pole, overcome the eccentric effect of pneumatic cylinder and case pole, can guarantee its machining precision.

Description

Exhaust opening and closing device of ductile cast iron pipe hydraulic press

Technical Field

The utility model relates to a nodular cast-iron pipe production technical field, concretely relates to nodular cast-iron pipe hydraulic press exhaust headstock gear.

Background

In the production line of the nodular cast iron pipe, the hydraulic press is used for detecting the water pressure withstand voltage of the production line of the nodular cast iron pipe, and the condition that products delivered from a factory meet the water pressure test requirement and the pipelines have no leakage is ensured. The hydraulic press testing process comprises the following steps: the pipe is sealed through the bell and spigot plug, low-pressure water is filled in the pipe, the inside of the pipe is exhausted, after the exhaust is finished, the exhaust device is closed, then high-pressure water is filled in the pipe, the pressure is maintained for a certain time, the water leakage phenomenon does not occur, and the pipe is communicated with the next procedure after the pipe is detected to be qualified. In the product testing regulation, the exhaust opening and closing are completed through an exhaust device connected with a socket, and how to ensure that high-pressure water does not leak from the exhaust device in the processes of reliable exhaust and pressure maintaining after the high-pressure water is filled is realized, so that the internal quality detection of the product and the production line efficiency are directly related. The traditional exhaust opening and closing device adopts the contact of a fixed metal valve core seat and a valve rod metal surface line to realize reliable sealing, and the poor guiding of the valve core rod causes poor sealing or short service life; the valve core rod is driven by a single-action or double-action hydraulic cylinder and an air cylinder, the single-action hydraulic cylinder or the air cylinder needs to return by a spring, the driving force is large, the driving cylinder is connected with the valve core rod, the machining precision requirement is high, otherwise, the driving cylinder is easy to generate eccentricity, and the sealing is not tight or the service life is short; meanwhile, the traditional opening and closing device is directly switched, and the noise is high.

SUMMERY OF THE UTILITY MODEL

The utility model provides a pair of nodular cast-iron pipe hydraulic press exhaust headstock gear aims at solving the problem that exists among the above-mentioned background art.

In order to realize the technical purpose, the utility model discloses a following technical scheme:

the exhaust opening and closing device of the ductile cast iron pipe hydraulic press comprises a valve seat, wherein a medium inlet pipe is arranged in the valve seat in a mode of penetrating through the bottom of the valve seat, a medium outlet pipe is arranged on the side wall of the valve seat, a base with a hollow inner part is fixedly arranged on the upper portion of the valve seat, a hydraulic cylinder is fixedly arranged above the base, a connecting piece is fixedly arranged at the end portion of an output shaft of the hydraulic cylinder, the middle of the bottom of the connecting piece is inwards sunken into a spherical arc shape, a valve core rod is arranged in the spherical arc shape in a matched mode, a clamping ring is fixedly arranged on the end face of the top of the valve core rod, the clamping ring is fixedly connected with the periphery of the.

Preferably, an annular guide sleeve is further fixedly installed in the through hole in the upper portion of the valve seat, and the valve core rod penetrates through the annular guide sleeve to be discontinuously connected with the medium inlet pipe.

Furthermore, an annular sealing ring matched with the diameter of the annular guide sleeve is fixedly arranged in the circumferential direction of the middle part of the annular guide sleeve.

Preferably, the plug at the bottom end of the valve core rod is of a conical structure, and the top of the medium inlet pipe is provided with a medium inlet and outlet hole matched with the plug.

Preferably, the valve seat is further fixedly provided with a valve core seat and a gland in a matched manner, the top of the medium inlet pipe penetrates through the inside of the valve core seat, the middle of the medium inlet pipe penetrates through the gland, the bottom of the medium inlet pipe and the bottom of the medium outlet pipe are provided with a flange in a matched manner, and the flange at the bottom of the medium inlet pipe is fixedly connected with the gland through a bolt.

Furthermore, the gland is in a step shape, a downward groove is formed in the end face of the top of the gland, and the bottom of the valve core seat is clamped in the groove.

Furthermore, a first spring is further sleeved outside the valve core rod in the valve core seat, an elastic part is arranged outside the first spring, a second spring is fixedly installed at the bottom of the elastic part, and the other end of the second spring is fixedly installed at the inner wall of the top of the gland.

Compared with the prior art, the utility model discloses following beneficial effect has: the hydraulic cylinder and the valve core rod are connected and driven through the connecting piece, and the bottom end face of the connecting piece is arranged into an inwards concave spherical arc shape, so that the guiding requirement of the valve core rod can be ensured, the eccentric action of the hydraulic cylinder and the valve core rod is overcome, and the processing precision of the hydraulic cylinder and the valve core rod can be ensured; meanwhile, the valve core rod is controlled to move in the guide sleeve, so that the valve core rod can be further prevented from eccentric movement, and the machining precision is further improved.

Drawings

FIG. 1: the structure of embodiment 1 in the utility model is schematically shown;

FIG. 2: the structure of embodiment 2 in the utility model is schematically shown;

fig. 3 is an enlarged schematic view of fig. 2A of the present invention.

Detailed Description

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Example 1

An exhaust opening and closing device of a ductile cast iron pipe hydraulic press as shown in fig. 1 comprises a valve seat 1, a medium inlet pipe 2 is arranged in the valve seat 1 and penetrates through the bottom of the valve seat 1, a medium outlet pipe 17 is arranged on the side wall of the valve seat, a base 3 which is arranged in a hollow mode is fixedly arranged on the upper portion of the valve seat 1, a hydraulic cylinder 4 is fixedly arranged above the base 3, a connecting piece 5 is fixedly arranged at the end portion of an output shaft of the hydraulic cylinder 4, the middle of the bottom of the connecting piece 5 is inwards sunken into a spherical arc shape, a valve core rod 6 is arranged in the spherical arc shape in a matched mode, a clamping ring 7 is fixedly arranged on the top end face of the valve core rod 6, the clamping ring 7 is fixedly connected with the periphery of the connecting.

The utility model discloses in, realize between pneumatic cylinder 4 and the case pole 6 through connecting piece 5 that both are connected the drive, because connecting piece 5 bottom terminal surface sets up to inside sunken sphere arcuation, can guarantee the direction requirement of case pole 6 like this, overcome the eccentric action of pneumatic cylinder 4 and case pole 6, can guarantee its machining precision.

Additionally, the utility model discloses in, still fixed mounting has annular guide pin bushing 9 in the through-hole on disk seat 1 upper portion, and case pole 6 passes annular guide pin bushing 9 and advances to manage 2 with the medium and be connected, and control case pole 6 removes in guide pin bushing 9, can further prevent that it from producing eccentric shift, further improves the machining precision.

In order to ensure the sealing performance of the valve core rod 6 in the up-and-down movement process and prevent the medium from flowing out of the valve seat 1, an annular sealing ring 10 matched with the annular guide sleeve 9 in diameter is fixedly arranged in the middle of the annular guide sleeve 9 in the circumferential direction.

Because when traditional headstock gear directly switches, the noise is great, the utility model discloses in, for the noise reduction, the applicant sets up the end cap 8 of 6 bottoms of case pole into the toper structure, and the medium advances to manage 2 tops and be provided with and advance the hole with this end cap 8 matched with medium. The end cap 8 with the conical structure enables the top of the valve core rod 6 to have a long slope, so that the switching resistance is sequentially increased, and the effect of reducing noise is achieved.

As the utility model discloses a further improvement, still cooperate fixed mounting to have valve core case 11 and gland 12 on the disk seat 1, inside the medium entered 2 tops of pipe to run through valve core case 11, the medium entered 2 middle parts of pipe to run through gland 12, and the medium entered the bottom cooperation of pipe 2 and medium exit tube 17 and installed ring flange 13, and the medium entered ring flange 13 of pipe 2 below and passed through bolt fixed connection with gland 12. Further, the gland 12 is stepped, a downward groove is arranged on the top end face of the gland 12, and the bottom of the valve core seat 11 is clamped in the groove. Through the setting of case seat 11 and gland 12, advance pipe 2 to the medium and play the effect of fastening, when can avoiding the medium to advance inside the pipe 2 and let in a large amount of media, because the slight removal that the vibration arouses leads to end cap 8 can not stop up the medium completely and advance the pipe, influences and opens and close the effect.

Example 2

Basically, the difference is as in example 1: the utility model discloses in, as shown in fig. 2, 3, the outside cover that still is equipped with first spring 14 of case pole 6 in case seat 11, first spring 14 outside fixed mounting has elastic component 15, and elastic component 15 bottom fixed mounting has second spring 16, and the bottom lateral wall fixed mounting that the second spring 16 other end stretches out case seat 11 is in gland 12 top inner wall department. Like this, when the medium entered pipe 2 inside and gushed into a large amount of media, the medium entered pipe 2 can play good cushioning effect through first spring 14, elastic component 15 and second spring 16, and first spring 14 and second spring 16 are vertical respectively and the horizontal direction setting, then can reduce the effect that the vibration entered pipe 2 to the medium from many angles, effectively improve the medium and entered pipe 2's life, prevent that it from producing the leakage phenomenon.

The above-mentioned embodiments are only exemplary, and in order to enable those skilled in the art to better understand the present invention, it should not be understood as a limitation to the scope of the present invention, and any improvement made according to the technical solution of the present invention is included in the scope of the present invention.

Claims

1. The utility model provides a nodular cast-iron pipe hydraulic press exhaust headstock gear which characterized in that: the valve core rod is fixedly arranged on the top end face of the valve core rod in a matched mode, a clamping ring is fixedly arranged on the top end face of the valve core rod and fixedly connected with the periphery of the connecting piece, the valve core rod penetrates through a through hole in the upper portion of the valve seat, and a plug matched with the top of the medium inlet pipe is arranged at the bottom end of the valve core rod.

2. The exhaust opening and closing device of the ductile cast iron pipe hydraulic press as claimed in claim 1, characterized in that: an annular guide sleeve is further fixedly installed in the through hole in the upper portion of the valve seat, and the valve core rod penetrates through the annular guide sleeve to be discontinuously connected with the medium inlet pipe.

3. The exhaust opening and closing device of the ductile cast iron pipe hydraulic press as claimed in claim 2, characterized in that: and an annular sealing ring matched with the diameter of the annular guide sleeve in size is fixedly arranged in the circumferential direction of the middle part of the annular guide sleeve.

4. The exhaust opening and closing device of the ductile cast iron pipe hydraulic press as claimed in claim 1, characterized in that: the plug at the bottom end of the valve core rod is of a conical structure, and the top of the medium inlet pipe is provided with a medium inlet and outlet hole matched with the plug.

5. The exhaust opening and closing device of the ductile cast iron pipe hydraulic press as claimed in claim 1, characterized in that: the valve seat is also matched and fixedly provided with a valve core seat and a gland, the top of the medium inlet pipe penetrates through the inside of the valve core seat, the middle of the medium inlet pipe penetrates through the gland, the bottoms of the medium inlet pipe and the medium outlet pipe are matched and provided with a flange plate, and the flange plate at the bottom of the medium inlet pipe is fixedly connected with the gland through a bolt.

6. The exhaust opening and closing device of the ductile cast iron pipe hydraulic press as claimed in claim 5, characterized in that: the gland is in a step shape, a downward groove is formed in the end face of the top of the gland, and the bottom of the valve core seat is clamped in the groove.

7. The exhaust opening and closing device of the ductile cast iron pipe hydraulic press as claimed in claim 6, characterized in that: the valve core is characterized in that a first spring is further sleeved outside a valve core rod in the valve core seat, an elastic part is arranged on the outer side of the first spring, a second spring is fixedly installed at the bottom of the elastic part, and the other end of the second spring is fixedly installed on the inner wall of the top of the gland.