High-pressure lubricant joint

Abstract

The utility model relates to the technical field of joints, and provides a high-pressure lubricant joint. Comprising a connector body, a cone fixed to the inner side of the bottom of the connector body, a ball support arranged in the connector body in a sliding mode, a first spring enabling the ball support to be elastically connected with the cone, a ball used for closing a cavity opening of the connector body under pushing of the ball support, and an oil injector connector capable of being in threaded connection with the connector body. An air channel is formed in the connector body, a locking piece for laterally locking the ball support is arranged at the bottom of the air channel, and an elastic plug piece capable of stretching out and drawing back is arranged at the top of the air channel. When the oil injector connector is in butt joint with the connector body, the outer sealing cover and the connector body can be installed in a threaded fit mode, the outer sealing cover and the connector body are fixedly installed, and the inner sealing cover and the annular plug are combined in a plug pressing mode, so that double-layer sealing is achieved, and the sealing effect is improved; the problem that in the prior art, a lubricant easily permeates into a thread gap under the action of high pressure is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of joints, in particular to a high-pressure lubricant joint. Background Art

[0002] High-pressure lubrication joints are generally installed on various large valve bodies, and play the role of connecting the valve body and the grease injection equipment, injecting lubricant into the valve body to protect the key connecting components of the normal operation of the internal structure of the valve body. The announcement number CN210716896U disclosed after searching disclosed a high-pressure lubricant joint, including a joint body, an injection cavity is opened at the center of the upper surface of the joint body, an inner cavity is opened at the bottom of the injection cavity, a reset structure is provided inside the inner cavity, a floating cone is clamped at the bottom of the inner cavity, the top of the floating cone is fixedly connected to the bottom of the reset structure, and a through hole is opened on the upper surface of the floating cone. The high-pressure lubricant joint is provided with a reset structure, and the lubricant is injected into the valve body through the injection cavity through the reset structure. The lubricant can pass through the gap between the ball and the injection cavity, and then pass through the notch, the inner ring of the spring and the through hole in turn into the valve body connected to the bottom end of the joint body, and can work stably under high pressure environment.

[0003] However, the above-mentioned high-pressure lubricant joint still has the following problems: due to the high pressure in the cavity when the high-pressure lubricant joint is connected, some lubricants are easy to penetrate into the thread gap under the action of high pressure, which not only causes seepage problems, but also affects the connection stability between the joints. Utility Model Content

[0004] The utility model provides a high-pressure lubricant joint, which solves the problem in the prior art that the lubricant is easy to penetrate into the thread gap under the action of high pressure.

[0005] The technical scheme of the utility model is as follows: a high-pressure lubricant joint, comprising a joint body, a cone fixed to the inner side of the bottom of the joint body, a ball bracket slidably arranged in the joint body, a first spring that elastically connects the ball bracket to the cone, a ball that closes the cavity of the joint body under the push of the ball bracket, and an oiler joint that can be threadedly connected to the joint body, an airway is opened in the joint body, a locking piece for laterally locking the ball bracket is arranged at the bottom of the airway, an elastic plug capable of telescopic movement is arranged at the top of the airway, an inner sealing cover is fixed inside the oiler joint, an annular socket matched with the inner sealing cover is opened on the top of the joint body, and after the oiler joint is docked with the joint body, the inner sealing cover squeezes the elastic plug to release the restriction of the locking piece on the ball bracket.

[0006] Preferably, the air passage includes an annular cavity, which is communicated with the annular socket, and a plurality of annularly distributed air guide holes are provided at the bottom of the annular cavity, and a telescopic cavity is connected to the bottom of the air guide holes, and the telescopic cavity is radially arranged relative to the joint body, and a pressure relief hole leading to the outside is provided at one end of the telescopic cavity away from the air guide holes.

[0007] Preferably, the locking member comprises a stop rod, an outer ring plug slidably arranged in the telescopic cavity is fixed to the outer side of the stop rod, one end of the stop rod passes through the telescopic cavity and extends to the inner cavity of the joint body, and a bevel is provided at the extended end of the stop rod.

[0008] Preferably, a stop ring is fixed in the telescopic cavity, and the stop ring is located between the air guide hole and the outer ring plug.

[0009] Preferably, the elastic plug comprises an annular plug and a second spring, the annular plug is slidably disposed in the annular cavity, and two ends of the second spring abut against the annular plug and the inner wall of the annular cavity.

[0010] Preferably, the oiler connector comprises a pressure plate, and an outer sealing cover threadably matched with the connector body is fixed to the bottom of the pressure plate.

[0011] The beneficial effects of the utility model are:

[0012] 1. In the utility model, when the oiler joint is connected to the joint body, the outer cover can be installed by threading the joint body. The utility model realizes double-layer sealing by fixing the outer cover and the joint body and combining the inner cover and the annular plug in a press-plug form, thereby improving the sealing effect and solving the problem in the prior art that the lubricant is easy to penetrate into the thread gap under high pressure;

[0013] 2. In the utility model, the inner cover of the oiler joint is inserted into the annular socket of the joint body, and then inserted into the annular cavity to press the annular plug, so that the annular plug overcomes the elastic force of the second spring and slides downward, and then the air in the annular cavity is squeezed out into the telescopic cavity through the air guide hole, so that the air pressure in the telescopic cavity is increased, and then the outer ring plug is pushed to drive the blocking rod to move toward the end, so that the inclined surface releases the restriction on the ball bracket. When the lubricant is injected, the pressure on the ball can push the ball bracket to move downward, so that the cavity of the joint body is opened to complete the oil injection action;

[0014] 3. In the utility model, when the oiler joint is detached from the joint body, the annular plug is automatically reset by the elastic force of the second spring, and the air in the telescopic cavity is sucked into the annular cavity. The baffle rod is automatically extended to the inner cavity of the joint body by the action of the outer ring plug, and the ball bracket is automatically lifted upward by the elastic force of the first spring, and then the inclined surface is squeezed to make the baffle rod shrink into the telescopic cavity until the ball bracket passes over the baffle rod. The baffle rod is automatically locked by the air pressure to prevent the ball bracket from loosening. Compared with the prior art, the stable sealing of the high-pressure lubricant joint in the disconnected state is guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0016] Figure 1 This is a schematic diagram of the structure of the high-pressure lubricant joint proposed by the utility model;

[0017] Figure 2 This is a schematic diagram of the cross-sectional structure of the high-pressure lubricant joint proposed by the utility model;

[0018] Figure 3 for Figure 2 The enlarged structural diagram at A in the middle;

[0019] Figure 4 for Figure 2 The enlarged structural diagram at B in the middle;

[0020] In the figure: 1. Connector body; 11. Annular socket; 12. Annular cavity; 13. Air guide hole; 14. Telescopic cavity; 141. Stop ring; 15. Pressure relief hole; 2. Oiler connector; 21. Pressure plate; 22. Outer cover; 23. Inner cover; 3. Cone; 4. Ball bracket; 5. First spring; 6. Ball; 7. Elastic plug; 71. Annular plug; 72. Second spring; 8. Locking piece; 81. Stop rod; 82. Outer ring plug; 83. Inclined surface. DETAILED DESCRIPTION

[0021] The following will be combined with the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1 and Figure 2The utility model provides a technical solution: a high-pressure lubricant joint, comprising a joint body 1, a cone 3 fixed to the inner side of the bottom of the joint body 1, a ball bracket 4 slidably arranged in the joint body 1, a first spring 5 that elastically connects the ball bracket 4 with the cone 3, a ball 6 that closes the cavity of the joint body 1 under the push of the ball bracket 4, and an oiler joint 2 that can be threadedly connected to the joint body 1, an airway is opened in the joint body 1, a locking piece 8 for laterally locking the ball bracket 4 is arranged at the bottom of the airway, an elastic plug 7 that can telescopically move is arranged at the top of the airway, an inner sealing cover 23 is fixed inside the oiler joint 2, and an annular socket 11 matched with the inner sealing cover 23 is opened at the top of the joint body 1. After the oiler joint 2 is docked with the joint body 1, the inner sealing cover 23 squeezes the elastic plug 7 to release the restriction of the locking piece 8 on the ball bracket 4.

[0023] See also Figure 2 The air passage includes an annular cavity 12, which is communicated with the annular socket 11. A plurality of annularly distributed air guide holes 13 are provided at the bottom of the annular cavity 12, and a telescopic cavity 14 is connected to the bottom of the air guide holes 13. The telescopic cavity 14 is radially arranged relative to the joint body 1, and a pressure relief hole 15 leading to the outside is provided at one end of the telescopic cavity 14 away from the air guide holes 13.

[0024] See also Figure 2 and Figure 4 The locking member 8 includes a stop rod 81, an outer side of which is fixed with an outer ring plug 82 slidably arranged in the telescopic cavity 14, one end of the stop rod 81 passes through the telescopic cavity 14 and extends to the inner cavity of the joint body 1, and a bevel 83 is provided at the extended end of the stop rod 81, and a stop ring 141 is fixed in the telescopic cavity 14, and the stop ring 141 is located between the air guide hole 13 and the outer ring plug 82. The elastic plug 7 is compressed so that the air in the annular cavity 12 can be squeezed into the telescopic cavity 14 through the air guide hole 13, so that the air pressure in the telescopic cavity 14 increases, and then the outer ring plug 82 is pushed to drive the stop rod 81 to move toward the end where 15 is located, so that the bevel 83 releases the restriction on the ball bracket 4. When the lubricant is injected, the pressure on the ball 6 can push the ball bracket 4 to move downward, so that the cavity mouth of the joint body 1 is opened to complete the oil injection action.

[0025] See also Figure 2 and Figure 3The elastic plug 7 includes an annular plug 71 and a second spring 72. The annular plug 71 is slidably arranged in the annular cavity 12. The two ends of the second spring 72 abut against the inner wall of the annular plug 71 and the annular cavity 12. It should be noted that the elastic strength of the second spring 72 is smaller than the elastic strength of the first spring 5, that is, the second spring 72 is more likely to deform. During the installation process, the inner cover 23 of the oiler connector 2 is inserted into the annular socket 11 of the connector body 1, and then inserted into the annular cavity 12 to press the annular plug 71, and the annular plug 71 overcomes the elastic force of the second spring 72 and slides downward.

[0026] See also Figure 2 The oiler connector 2 includes a pressure plate 21, and an outer sealing cover 22 threadedly matched with the connector body 1 is fixed to the bottom of the pressure plate 21. When the oiler connector 2 is docked with the connector body 1, the outer sealing cover 22 can be installed by threading the connector body 1.

[0027] The working principle and use process of the utility model are as follows: Figure 2 As shown, when the oiler connector 2 is docked with the connector body 1, the outer sealing cover 22 can be installed by threading the connector body 1. During the installation process, the inner sealing cover 23 of the oiler connector 2 is inserted into the annular socket 11 of the connector body 1, and then inserted into the annular cavity 12 to press the annular plug 71. The annular plug 71 overcomes the elastic force of the second spring 72 and slides downward, thereby squeezing the air in the annular cavity 12 into the telescopic cavity 14 through the air guide hole 13, so that the air pressure in the telescopic cavity 14 increases, and then pushes the outer ring plug 82 to drive the stopper 81 to move toward the end where 15 is located, so that the inclined surface 83 releases the restriction on the ball bracket 4. When injecting lubricant, the pressure on the ball 6 can push the ball bracket 4 to move downward, so that the cavity of the connector body 1 is opened to complete the oil injection action;

[0028] When the oiler connector 2 is separated from the connector body 1, the annular plug 71 is automatically reset by the elastic force of the second spring 72, thereby sucking the air in the telescopic cavity 14 into the annular cavity 12, and the baffle rod 81 is automatically extended into the inner cavity of the connector body 1 by the action of the outer ring plug 82, while the ball bracket 4 is automatically lifted upward by the elastic force of the first spring 5, thereby squeezing the inclined surface 83, causing the baffle rod 81 to shrink into the telescopic cavity 14, until the ball bracket 4 passes over the baffle rod 81, and the baffle rod 81 is automatically locked by the air pressure to prevent the ball bracket 4 from loosening.

[0029] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-pressure lubricant joint, comprising a joint body (1), a cone (3) fixed to the inner side of the bottom of the joint body (1), a ball bracket (4) slidably arranged in the joint body (1), a first spring (5) elastically connecting the ball bracket (4) and the cone (3), a ball (6) for sealing the opening of the joint body (1) under the push of the ball bracket (4), and an oiler joint (2) capable of being threadedly connected to the joint body (1), characterized in that: An air passage is provided in the joint body (1), a locking member (8) for laterally locking the ball bracket (4) is provided at the bottom of the air passage, an elastic plug (7) capable of telescopic movement is provided at the top of the air passage, an inner sealing cover (23) is fixed inside the oiler joint (2), an annular socket (11) adapted to the inner sealing cover (23) is provided at the top of the joint body (1), and after the oiler joint (2) is docked with the joint body (1), the inner sealing cover (23) presses the elastic plug (7) to release the restriction of the locking member (8) on the ball bracket (4).

2. The high-pressure lubricant joint according to claim 1, characterized in that The air passage comprises an annular cavity (12), the annular cavity (12) being in communication with the annular socket (11), a plurality of annularly distributed air guide holes (13) being provided at the bottom of the annular cavity (12), and a telescopic cavity (14) being in communication with the bottom of the air guide holes (13), the telescopic cavity (14) being arranged radially relative to the joint body (1), and a pressure relief hole (15) leading to the outside being provided at one end of the telescopic cavity (14) away from the air guide holes (13).

3. The high-pressure lubricant joint according to claim 2, characterized in that The locking member (8) comprises a stop rod (81), an outer ring plug (82) slidably arranged in the telescopic cavity (14) is fixed to the outer side of the stop rod (81), one end of the stop rod (81) passes through the telescopic cavity (14) and extends into the inner cavity of the joint body (1), and a slope (83) is provided at the extended end of the stop rod (81).

4. The high-pressure lubricant joint according to claim 3, characterized in that A stop ring (141) is fixed in the telescopic cavity (14), and the stop ring (141) is located between the air guide hole (13) and the outer ring plug (82).

5. The high pressure lubricant joint according to claim 1, characterized in that: The elastic plug (7) comprises an annular plug (71) and a second spring (72); the annular plug (71) is slidably arranged in the annular cavity (12); and two ends of the second spring (72) abut against the annular plug (71) and the inner wall of the annular cavity (12).

6. The high pressure lubricant joint according to claim 1, characterized in that The oiler connector (2) comprises a pressure plate (21), and an outer sealing cover (22) threadably matched with the connector body (1) is fixed to the bottom of the pressure plate (21).

Images