阅读说明：本技术 一种活塞式缓冲器 (Piston type buffer ) 是由 代永生 于 2019-09-17 设计创作，主要内容包括：本发明公开了一种活塞式缓冲器,包括阀体和下盖体,所述阀体内部依次连通设置有用于连接压力表的连接螺孔、导流腔和滑动腔,所述滑动腔内部滑动设置有活塞,所述阀体远离所述连接螺孔的外侧设置有连接外螺纹；所述下盖体内部设置有安装螺孔,用于配合所述连接外螺纹实现所述下盖体和所述阀体的连接,所述下盖体远离所述安装螺孔的侧面一体设置有安装部,用于实现所述下盖体与油路的螺纹连接,所述安装部内部设置有引流腔,所述引流腔与所述安装螺孔相连通。有益效果在于：通过活塞受力并推动介质传递压力,保证压力测量的同时,能够防止液压油内部的杂质进入压力表内部,确保压力表测量精准,有助于延长压力表使用寿命。(The invention discloses a piston type buffer, which comprises a valve body and a lower cover body, wherein a connecting screw hole, a flow guide cavity and a sliding cavity which are used for connecting a pressure gauge are sequentially communicated and arranged in the valve body; the novel oil way drainage valve is characterized in that an installation screw hole is formed in the lower cover body and used for being matched with the external connection thread to achieve connection of the lower cover body and the valve body, an installation portion is integrally arranged on the side face of the installation screw hole and used for achieving threaded connection of the lower cover body and an oil way, a drainage cavity is formed in the installation portion and communicated with the installation screw hole. Has the advantages that: through piston atress and promotion medium transmission pressure, when guaranteeing pressure measurement, can prevent that the inside impurity of hydraulic oil from getting into the manometer inside, ensure that the manometer measures accurately, help extension manometer life.)

1. A piston damper, characterized in that: the valve comprises a valve body (2), a lower cover body (4) and a plug (1), wherein a connecting screw hole (201) for connecting a pressure gauge, a flow guide cavity (202) and a sliding cavity (204) are sequentially communicated with the inside of the valve body (2), a piston (3) is arranged in the sliding cavity (204) in a sliding manner, and a connecting external thread (206) is arranged on the outer side of the valve body (2) far away from the connecting screw hole (201);

An installation screw hole (401) is formed in the lower cover body (4) and is used for being matched with the connecting external thread (206) to achieve connection of the lower cover body (4) and the valve body (2), an installation portion (403) is integrally arranged on the side face, far away from the installation screw hole (401), of the lower cover body (4) and is used for achieving threaded connection of the lower cover body (4) and an oil way, a drainage cavity (404) is formed in the installation portion (403), and the drainage cavity (404) is communicated with the installation screw hole (401);

The plug (1) is used for being matched with the connecting screw hole (201) to plug and seal the flow guide cavity (202) when not in use.

2. A piston-type shock absorber according to claim 1, wherein: and an outer side sealing ring (301) is embedded into the outer side of the piston (3).

3. A piston-type shock absorber according to claim 1, wherein: the end part of the sliding cavity (204) far away from the flow guide cavity (202) is provided with an end sealing groove (205), and an end sealing ring (5) is arranged in the end sealing groove (205) and used for realizing the connection sealing between the valve body (2) and the lower cover body (4).

4. A piston bumper as defined in claim 3, wherein: a flow guide conical hole (203) is formed in the communication position of the sliding cavity (204) and the flow guide cavity (202), and the large-diameter end of the flow guide conical hole (203) is connected with the sliding cavity (204).

5. A piston-type shock absorber according to claim 1, wherein: the joint of the drainage cavity (404) and the installation screw hole (401) is provided with a transition cavity (402) for increasing the contact area between the hydraulic oil in the drainage cavity (404) and the piston (3).

6. A piston-type shock absorber according to claim 1, wherein: the plug (1) comprises a screwing part (101), a connecting part (102) with an external thread is arranged on the side surface of the screwing part (101), and the connecting part (102) is matched with the connecting screw hole (201).

7. A piston bumper as defined in claim 6, wherein: the connecting screw hole (201) and the connecting position of the flow guide cavity (202) are provided with a sealing taper hole (207), the large-diameter end of the sealing taper hole (207) is connected with the connecting screw hole (201), the side face, far away from the screwing part (101), of the connecting part (102) is provided with a conical column (103), and the conical column (103) and the sealing taper hole (207) have the same taper.

Technical Field

The invention relates to the technical field of buffers, in particular to a piston type buffer.

Background

In order to guarantee normal and safe operation of the oil circuit of the equipment, the oil pressure of the oil circuit needs to be detected by using the pressure gauge, and in order to guarantee normal operation of the pressure gauge and prolong the service life of the pressure gauge, the pressure gauge needs to be protected by buffering by using a buffer. However, the current buffer can cause impurities in hydraulic oil to enter the pressure gauge in use, pressure data can be inaccurate due to long-term use, and the service life of the pressure gauge is shortened.

Disclosure of Invention

The present invention is directed to provide a piston type buffer to solve the above problems, so as to solve the technical problems in the prior art that impurities in hydraulic oil may enter a pressure gauge during use of the existing buffer, pressure data may be inaccurate after long-term use, and the service life of the pressure gauge may be reduced. According to the preferable technical scheme of the technical schemes provided by the invention, the piston is stressed and pushes the medium to transfer pressure, so that the pressure measurement is ensured, impurities in hydraulic oil can be prevented from entering the pressure gauge, the pressure gauge is ensured to be accurately measured, the technical effects of prolonging the service life of the pressure gauge and the like are facilitated, and the technical effects are explained in the following.

In order to achieve the purpose, the invention provides the following technical scheme:

the invention provides a piston type buffer, which comprises a valve body, a lower cover body and a plug, wherein a connecting screw hole, a flow guide cavity and a sliding cavity which are used for connecting a pressure gauge are sequentially communicated and arranged in the valve body;

The lower cover body is internally provided with an installation screw hole for matching with the external connecting thread to realize the connection of the lower cover body and the valve body, the side surface of the lower cover body, which is far away from the installation screw hole, is integrally provided with an installation part for realizing the threaded connection of the lower cover body and an oil way, and the inside of the installation part is provided with a drainage cavity which is communicated with the installation screw hole;

The plug is used for being matched with the connecting screw hole to plug and seal the flow guide cavity when not in use.

When the piston type buffer is used, the piston is arranged in the sliding cavity, the connection between the lower cover body and the valve body is realized through the mounting screw hole and the connecting external thread, the connection between the lower cover body and the oil way is realized through the mounting part, clean oil is injected into the sliding cavity through the flow guide cavity to serve as a medium, the connection between the valve body and the pressure gauge is realized through the connecting screw hole, when pressure measurement is carried out, hydraulic oil in the oil way enters the sliding cavity through the drainage cavity, the hydraulic oil pushes the piston, the piston is stressed and pushes the medium to transmit pressure, the pressure gauge is convenient to carry out pressure measurement, the piston is stressed and pushes the medium to transmit pressure, and the impurities in the hydraulic oil can be prevented from entering the pressure gauge while pressure measurement is ensured, ensure that the manometer measures accurately, help prolonging manometer life.

preferably, an outer seal ring is fitted to the outside of the piston.

preferably, the end part of the sliding cavity, which is far away from the diversion cavity, is provided with an end part sealing groove, and an end part sealing ring is installed inside the end part sealing groove and used for realizing the connection and sealing between the valve body and the lower cover body.

Preferably, a flow guide taper hole is formed in the communication position of the sliding cavity and the flow guide cavity, and the large-diameter end of the flow guide taper hole is connected with the sliding cavity.

Preferably, a transition cavity is arranged at the joint of the drainage cavity and the mounting screw hole and used for increasing the contact area of hydraulic oil in the drainage cavity and the piston.

Preferably, the plug comprises a screwing part, a side surface of the screwing part is provided with a connecting part with an external thread, and the connecting part is matched with the connecting screw hole.

Preferably, a sealing taper hole is formed in the joint of the connecting screw hole and the flow guide cavity, the large-diameter end of the sealing taper hole is connected with the connecting screw hole, a tapered column is arranged on the side face, far away from the screwing portion, of the connecting portion, and the taper of the tapered column is the same as that of the sealing taper hole.

Has the advantages that: through piston atress and promotion medium transmission pressure, when guaranteeing pressure measurement, can prevent that the inside impurity of hydraulic oil from getting into the manometer inside, ensure that the manometer measures accurately, help extension manometer life.

Drawings

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

FIG. 1 is a schematic view of the internal structure of the present invention;

FIG. 2 is a schematic view of the valve body structure of the present invention;

FIG. 3 is a schematic view of the structure of the lower cover of the present invention;

Fig. 4 is a schematic view of the plug structure of the present invention.

The reference numerals are explained below:

1. A plug; 101. a screwing part; 102. a connecting portion; 103. a tapered post; 2. a valve body; 201. a connecting screw hole; 202. a flow guide cavity; 203. a flow guiding taper hole; 204. a sliding cavity; 205. an end seal groove; 206. connecting external threads; 207. sealing the taper hole; 3. a piston; 301. an outer seal ring; 4. a lower cover body; 401. mounting a screw hole; 402. a transition chamber; 403. an installation part; 404. a drainage lumen; 5. and an end sealing ring.

Detailed Description

in order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.

Referring to fig. 1-4, the invention provides a piston type buffer, which comprises a valve body 2, a lower cover body 4 and a plug 1, wherein the inside of the valve body 2 is sequentially communicated with a connecting screw hole 201 for connecting a pressure gauge, a flow guide cavity 202 and a sliding cavity 204, a piston 3 is arranged in the sliding cavity 204 in a sliding manner, and the outer side of the valve body 2, which is far away from the connecting screw hole 201, is provided with a connecting external thread 206;

an installation screw hole 401 is formed in the lower cover body 4 and is used for being matched with the external thread 206 to realize the connection between the lower cover body 4 and the valve body 2, an installation part 403 is integrally arranged on the side surface, away from the installation screw hole 401, of the lower cover body 4 and is used for realizing the threaded connection between the lower cover body 4 and an oil way, a drainage cavity 404 is formed in the installation part 403, and the drainage cavity 404 is communicated with the installation screw hole 401;

The plug 1 is used for being matched with the connecting screw hole 201 to plug and seal the diversion cavity 202 when not in use.

As an alternative embodiment, an outer sealing ring 301 is embedded outside the piston 3, so as to ensure the sealing between the piston 3 and the sliding cavity 204 and prevent the hydraulic oil from leaking.

The end part of the sliding cavity 204 far away from the diversion cavity 202 is provided with an end sealing groove 205, and an end sealing ring 5 is arranged inside the end sealing groove 205 and used for realizing the connection sealing between the valve body 2 and the lower cover body 4, so that the connection sealing performance of the valve body 2 and the lower cover body 4 can be ensured, and the leakage of hydraulic oil can be prevented.

The communication position of the sliding cavity 204 and the flow guide cavity 202 is provided with the flow guide taper hole 203, the large-diameter end of the flow guide taper hole 203 is connected with the sliding cavity 204, and the flow guide taper hole 203 is arranged so that a medium in the sliding cavity 204 can conveniently and quickly enter the flow guide cavity 202, and the pressure detection efficiency is improved.

Drainage chamber 404 and the junction of installation screw 401 are provided with adapter 402 for improve the area of contact of the inside hydraulic oil of drainage chamber 404 and piston 3, set up like this that the inside hydraulic oil of drainage chamber 404 gets into inside adapter 402, increase the area of contact of hydraulic oil and piston 3, help accelerating hydraulic oil and promote the piston 3 and remove.

The plug 1 comprises a screwing part 101, a connecting part 102 with an external thread is arranged on the side face of the screwing part 101, the connecting part 102 is matched with a connecting screw hole 201, and therefore when a pressure gauge is not used for pressure measurement, the connecting part 102 is screwed into the connecting screw hole 201 through the screwing part 101 to seal a flow guide cavity 202 and prevent dust from entering the flow guide cavity 202.

The connecting screw hole 201 and the diversion cavity 202 are connected through a sealing taper hole 207, the large-diameter end of the sealing taper hole 207 is connected with the connecting screw hole 201, the side face, away from the screwing portion 101, of the connecting portion 102 is provided with the tapered column 103, the tapered column 103 is the same as the taper of the sealing taper hole 207, and the tapered column 103 is matched with the sealing taper hole 207 in the arrangement mode, so that the sealing effect on the diversion cavity 202 is improved.

with the structure, when in use, the piston 3 is arranged in the sliding cavity 204, the lower cover body 4 is connected with the valve body 2 through the installation screw hole 401 and the connecting external thread 206, the connection between the lower cover 4 and the oil path is realized by the mounting part 403, clean oil is injected into the sliding chamber 204 through the diversion chamber 202 as a medium, the valve body 2 is connected with the pressure gauge through the connecting screw hole 201, when pressure measurement is carried out, hydraulic oil in the oil path enters the sliding cavity 204 through the drainage cavity 404, the hydraulic oil pushes the piston 3, the piston 3 is stressed and pushes a medium, the medium transmits pressure, the pressure gauge is convenient to carry out pressure measurement, through 3 atress of piston and promotion medium transmission pressure, when guaranteeing pressure measurement, can prevent inside impurity entering manometer of hydraulic oil inside, ensure that the manometer measures accurately, help prolonging manometer life.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.