An adjustable self-closing pressure gauge valve

Abstract

The present invention discloses an adjustable self-closing pressure gauge valve, which relates to a pressure gauge and aims to solve the technical problem that the pressure gauge in the prior art is inconvenient to disassemble. The key points of the technical solution include a cylinder connected to an oil tank, a pin is provided at one end of the cylinder close to the oil tank, a through groove connected to the oil tank is provided in the pin, a flow channel connected to the through groove is provided in the cylinder, a self-closing component for closing the flow channel is sleeved on the pin, and a pressure gauge for driving the self-closing component to open the flow channel is connected to the side of the cylinder away from the pin; the pressure gauge is first removed, the flow channel is closed by the self-closing component to block the flow of hydraulic oil, a new pressure gauge is installed on the cylinder, the pressure gauge drives the self-closing component to open the flow channel, the hydraulic oil flows again, and the use of the pressure gauge can be reduced, thereby making it convenient and quick to disassemble and assemble the pressure gauge.

Description

Technical Field

[0001] The invention relates to a pressure gauge, and more particularly to an adjustable self-closing pressure gauge valve. Background Art

[0002] A pressure gauge is an instrument that uses elastic elements as sensitive elements to measure and indicate pressure higher than the ambient pressure. The pressure gauge uses the elastic deformation of the sensitive elements (Bourdon tube, diaphragm box, bellows) inside the gauge, and then the conversion mechanism of the gauge movement transmits the pressure deformation to the pointer, causing the pointer to rotate to display the pressure. This gauge can be seen everywhere in the fields of thermal pipe networks, oil and gas transmission, water and gas supply systems, and vehicle repair and maintenance shops.

[0003] The Chinese patent with authorization announcement number CN201849659U discloses a marine hydraulic steering gear, including a power pump group composed of a hydraulic pump, an oil tank, a low liquid level alarm installed on the oil tank, an air filter and an oil return filter, a pressure gauge, a steering mechanism, a travel switch, a relief valve, a two-position four-way solenoid reversing valve, a three-position four-way solenoid reversing valve, a steering gear special valve, a double stop valve, a flow amplification valve, a steering gear, a limit solenoid valve, a one-way valve and a pressure reducing valve, and a flow amplification valve.

[0004] When the hydraulic steering gear in the prior art is used for a long time, when the pressure gauge is damaged, it is necessary to replace the pressure gauge. At this time, it is necessary to turn off the pressure gauge switch and block the oil circuit before removing the pressure gauge. The disassembly and assembly is inconvenient and needs to be improved. Summary of the invention

[0005] In view of the deficiencies in the prior art, an object of the present invention is to provide an adjustable self-closing pressure gauge valve, which has the advantage of convenient disassembly and assembly of the pressure gauge.

[0006] The above object of the present invention is achieved through the following technical solutions:

[0007] An adjustable self-closing pressure gauge valve comprises a cylinder connected to an oil tank, a pin is provided at one end of the cylinder close to the oil tank, a through groove connected to the oil tank is provided in the pin, a flow channel connected to the through groove is provided in the cylinder, a self-closing component for closing the flow channel is sleeved on the pin, and a pressure gauge for driving the self-closing component to open the flow channel is connected to the side of the cylinder away from the pin.

[0008] By adopting the above technical solution, the pressure gauge is first removed, the flow channel is closed using the self-closing component to block the flow of hydraulic oil, and a new pressure gauge is installed on the cylinder. The pressure gauge drives the self-closing component to open the flow channel, and the hydraulic oil flows again, reducing the use of the pressure gauge, so that the pressure gauge can be disassembled and assembled conveniently and quickly.

[0009] Further, the self-closing component includes a push rod slidably arranged in the flow channel, the outer side wall of the push rod is in contact with the flow channel, the end wall of the push rod is provided with a mounting groove for inserting the nozzle of the pressure gauge, the side wall of the push rod is provided with a liquid outlet notch for the flow of hydraulic oil, the liquid outlet notch is connected to the mounting groove, and an end of the push rod away from the mounting groove is provided with a resisting rod;

[0010] An annular groove for screwing a pin into is provided at one end of the flow channel away from the pressure gauge, an opening and closing ball is rotatably provided in the annular groove, the junction corner between the annular groove and the flow channel is configured to abut against the opening and closing ball, a resistance spring is provided between the opening and closing ball and the pin, and the side of the opening and closing ball away from the resistance spring abuts against the resistance rod.

[0011] By adopting the above technical scheme, when replacing the pressure gauge, the pressure gauge is rotated, the push rod and the resistance rod move upward, the resistance spring pushes up the opening and closing ball, and the opening and closing ball resists the intersection corner between the annular groove and the flow channel, so that the flow channel can be closed; the new pressure gauge is screwed onto the cylinder, the pressure gauge nozzle is inserted into the installation groove, the push rod and the resistance rod are pressed down, the resistance rod can move the opening and closing ball downward, the resistance spring is compressed and accumulates force, the oil in the oil tank enters the annular groove along the through groove on the push pin, and then enters the flow channel, the hydraulic oil passes through the liquid outlet gap, and finally enters the installation groove, so that the pressure gauge can detect the oil pressure; the opening and closing ball is driven by the pressure gauge and the resistance spring to block and restore the flow of hydraulic oil, which is conducive to improving the convenience of replacing the pressure gauge; it can also reduce the possibility of leakage in the cylinder when replacing the pressure gauge.

[0012] Furthermore, a sealing ring groove is provided on one side of the opening and closing ball close to the abutment rod, and the junction corner between the annular groove and the flow channel is arranged to abut against the sealing ring groove.

[0013] By adopting the above technical solution, the intersection corner between the annular groove and the flow channel is used to interfere with the sealing ring groove, so as to increase the contact area of ​​the opening and closing ball, improve the effect of blocking the hydraulic oil, and reduce the possibility of hydraulic oil leakage.

[0014] Furthermore, a threaded ring groove for screwing the pressure gauge is provided on the top wall of the cylinder, a positioning groove connected to the flow channel is provided on the bottom wall of the threaded ring groove, a rubber ring is provided in the positioning groove, and the rubber ring abuts against the peripheral wall of the ejector rod.

[0015] By adopting the above technical solution, when the pressure gauge is screwed in, the nozzle of the pressure gauge moves the push rod downward, and the rubber ring can seal the liquid outlet gap, thereby reducing the possibility of oil leakage at the liquid outlet gap.

[0016] Furthermore, a limiting block is provided on the side wall of the flow channel and on a side close to the opening and closing ball, and the limiting block is in contact with a side of the push rod close to the abutment rod.

[0017] By adopting the above technical solution, the limit block is used to limit the movement of the push rod, thereby reducing the possibility that the resistance rod excessively squeezes the opening and closing ball and causes the resistance spring to fail.

[0018] Furthermore, an external thread connected to the oil tank thread is provided on the side wall of the cylinder, a nut connected to the external thread thread is provided on the outer side wall of the cylinder, and a tightening gasket is provided on the side of the nut close to the ejector pin.

[0019] By adopting the above technical solution, when the pressure gauge is screwed into the cylinder, the pressure gauge dial may not be able to face the human body, so at this time, the cylinder is rotated, and then the nut is rotated to press the gasket against the oil tank, so as to change the direction of the pressure gauge dial and facilitate observation of the pressure gauge data; at the same time, using the gasket to press the oil tank is beneficial to reduce the possibility of oil leakage.

[0020] Furthermore, an annular notch is provided on the outer wall of the cylinder, and a sealing notch connected to the annular notch is provided on the inner wall of the nut. A sealing cavity is formed within the annular notch and the sealing notch. A sealing ring is provided within the sealing cavity.

[0021] By adopting the above technical solution, the cylinder and the nut are sealed with a sealing ring, thereby reducing the possibility of oil leakage between the cylinder and the nut.

[0022] Furthermore, a resistance block is provided on the outer wall of the cylinder body and on one side close to the pressure gauge, and the resistance block is in resistance with the end wall of the nut.

[0023] By adopting the above technical solution, the abutment block is used to abut against the end wall of the nut, which is helpful to further reduce the possibility of oil leakage between the cylinder and the nut.

[0024] Further, the cylinder body comprises a fixed cylinder connected to the pressure gauge and a connecting cylinder threadedly connected to the oil tank, a connecting ring groove is provided on one side of the fixed cylinder close to the connecting cylinder, and a ring sheet screwed into the connecting ring groove is provided on one side of the connecting cylinder close to the fixed cylinder;

[0025] A positioning notch is provided on the inner side wall of the fixing cylinder near the connecting cylinder, a connecting ring block is provided in the positioning notch, a plurality of mounting grooves are provided on the inner side wall of the connecting ring block, a mounting spring is provided in the mounting groove, a positioning block is provided at one end of the mounting spring away from the bottom wall of the mounting groove, and a positioning groove for inserting the positioning block is provided on the side wall of the opening and closing ball;

[0026] A plurality of supporting springs are arranged on a side of the connecting ring block close to the ejector pin, and a side of the supporting spring away from the connecting ring block contacts the top wall of the connecting cylinder.

[0027] By adopting the above technical solution, first during installation, squeeze the installation spring, insert the positioning block into the positioning groove, then insert the connecting ring block and the supporting spring into the positioning notch, and then screw the ring piece into the connecting ring groove;

[0028] When the opening and closing ball is squeezed, the opening and closing ball is easy to rotate, and the intersection corner between the annular groove and the flow channel is separated from the sealing ring groove, resulting in a decrease in the effect of the opening and closing ball in sealing the flow channel. Therefore, a positioning block is inserted into the positioning groove. When the resistance rod squeezes the opening and closing ball, the supporting spring is compressed and accumulates force at the same time, thereby driving the connecting ring block, the positioning block and the opening and closing ball to move downward at the same time, thereby reducing the possibility of the opening and closing ball rotating and reducing the possibility of the opening and closing ball sealing the flow channel The possibility of decline; and after long-term use of the resistance spring, when the resistance spring fails, the resistance spring cannot close the flow channel with the opening and closing ball. At this time, the connecting ring block is pushed to move by the support spring, thereby driving the opening and closing ball to move, and the support spring and the resistance spring support the opening and closing ball at the same time, reducing the possibility of the opening and closing ball failing to seal the flow channel.

[0029] Furthermore, by adopting the above-mentioned technical solution, the threaded ring groove is prone to oil leakage between the connecting cylinder and the fixed cylinder because the ring sheet is threadedly connected to the connecting ring groove. Therefore, the annular spring is compressed by the plug plate, and the annular spring can compress the rubber pad and be inserted into the connecting ring groove through the rubber pad, thereby reducing the possibility of hydraulic oil leakage from between the connecting cylinder and the fixed cylinder.

[0030] In summary, the present invention has the following beneficial effects:

[0031] 1. Remove the pressure gauge first, close the flow channel with the self-closing component, and then install a new pressure gauge. The pressure gauge will drive the self-closing component to open the flow channel at the same time, so that the pressure gauge can be replaced quickly and conveniently;

[0032] 2. Use the intersection corner between the sealing ring groove, the annular groove and the flow channel to increase the sealing effect of the opening and closing ball;

[0033] 3. Turn the cylinder, adjust the direction of the pressure gauge dial, and then tighten the nut to change the direction of the pressure gauge and increase the convenience of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a structural schematic diagram of embodiment 1.

[0035] Figure 2 To reflect Figure 1 Schematic diagram of the local structure shown in the AA section.

[0036] Figure 3 To reflect Figure 2 Enlarged view of part A in the middle.

[0037] Figure 4 This is a schematic diagram of the structure of Example 2.

[0038] Figure 5 To reflect Figure 4 Schematic diagram of the local structure shown in section along BB.

[0039] Figure 6 To reflect Figure 5 Enlarged view of part B in the middle.

[0040] In the figure: 1, cylinder; 10, external thread; 11, nut; 12, tight gasket; 13, annular notch; 14, sealing notch; 15, sealing chamber; 16, sealing ring; 17, abutment block; 18, fixing cylinder; 19, connecting cylinder; 100, connecting ring groove; 101, ring piece; 102, positioning notch; 103, connecting ring block; 104, mounting groove; 105, mounting spring; 106, positioning block; 107, positioning groove; 108, supporting spring; 109, positioning ring groove; 110 , plug plate; 111, sliding space; 112, rubber pad; 113, annular spring; 114, installation notch; 2, ejector pin; 3, oil inlet; 4, through groove; 5, tip; 6, flow channel; 60, limit block; 7, self-closing component; 70, ejector rod; 71, installation groove; 72, liquid outlet notch; 73, resistance rod; 74, annular groove; 75, opening and closing ball; 76, resistance spring; 77, sealing ring groove; 78, threaded ring groove; 79, positioning groove; 700, rubber ring; 8, pressure gauge. DETAILED DESCRIPTION

[0041] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0042] Embodiment 1:

[0043] Reference Figure 1 and Figure 2 A self-closing adjustable pressure gauge valve comprises a cylinder 1, an outer wall of the cylinder 1 is provided with an external thread 10 which is screwed into an oil tank, an end of the cylinder 1 close to the oil tank is threadedly connected with a thimble 2, an end of the cylinder 1 close to the oil tank is threadedly connected with a thimble 2, an end of the thimble 2 away from an oil inlet 3 is provided with a tip 5, an end of the thimble 2 away from the tip 5 extends out of the cylinder 1, an end of the thimble 2 extending out of the cylinder 1 is provided with an oil inlet 3 connected with the oil tank, a through groove 4 connected with the oil inlet 3 is provided in the thimble 2, and a flow channel 6 connected with the through groove 4 is provided in the cylinder 1.

[0044] Reference Figure 2A self-closing component 7 for closing the flow channel 6 is sleeved on the tip 5, and the self-closing component 7 slides in the cylinder 1. A pressure gauge 8 for driving the self-closing component 7 to open the flow channel 6 is provided on the side of the cylinder 1 away from the ejector pin 2, and a threaded ring groove 78 for screwing the pressure gauge 8 into is provided on the top wall of the cylinder 1; first, the cylinder 1 is screwed into the oil tank, and the hydraulic oil in the oil tank enters the flow channel 6 along the oil inlet 3 and the through groove 4. When replacing the pressure gauge 8, the pressure gauge 8 is screwed out of the cylinder 1, and the flow channel 6 is closed by the self-closing component 7 to block the flow of hydraulic oil, and then a new pressure gauge 8 is screwed into the cylinder 1. The pressure gauge 8 drives the self-closing component 7 to open the flow channel 6, reducing the steps of opening and closing the pressure gauge 8 switch, so that the pressure gauge 8 can be disassembled and assembled conveniently and quickly.

[0045] Reference Figure 1 The self-closing assembly 7 includes a push rod 70, a resistance rod 73, an opening and closing ball 75 and a resistance spring 76 which are sequentially arranged in the flow channel 6 from the pressure gauge 8 to the push pin 2. The outer wall of the push rod 70 contacts the inner wall of the flow channel 6. The end wall of the push rod 70 is provided with a mounting groove 71 for inserting the nozzle of the pressure gauge 8. The side wall of the push rod 70 is provided with a liquid outlet notch 72 for the flow of hydraulic oil. The liquid outlet notch 72 is arranged along the axial direction of the push rod 70. The liquid outlet notch 72 is connected to the mounting groove 71. The bottom wall of the threaded annular groove 78 is provided with a positioning groove 79 which is connected to the flow channel 6. The positioning groove 79 is provided with a positioning groove 79 which is connected to the flow channel 6. A rubber ring 700 is provided in the groove 79, and the rubber ring 700 contacts the peripheral wall of the push rod 70 close to the pressure gauge 8; when the pressure gauge 8 is installed in the threaded ring groove 78, the bottom wall of the pressure gauge 8 contacts the bottom wall of the threaded ring groove 78, the mouth of the pressure gauge 8 squeezes the push rod 70, the installation groove 71 completely enters the flow channel 6, and the liquid outlet gap 72 is also completely in the flow channel 6. At this time, the liquid outlet gap 72 is sealed by the rubber ring 700, and the hydraulic oil can enter the installation groove 71 along the liquid outlet gap 72, thereby reducing the possibility of hydraulic oil leakage.

[0046] Reference Figure 2 The push rod 70 and the resistance rod 73 are integrally formed, the diameter of the resistance rod 73 is smaller than the diameter of the push rod 70, one side of the opening and closing ball 75 is in contact with the resistance rod 73, and the other side is in contact with the resistance spring 76, and the side of the resistance spring 76 away from the opening and closing ball 75 is sleeved on the tip 5.

[0047] Reference Figure 2, an annular groove 74 for the ejector pin 2 to be screwed into is provided on the side of the flow channel 6 away from the pressure gauge 8, the inner diameter of the annular groove 74 is larger than the inner diameter of the flow channel 6, and the intersection corner between the annular groove 74 and the flow channel 6 is set to abut against the opening and closing ball 75; when replacing the pressure gauge 8, the pressure gauge 8 is screwed out of the threaded annular groove 78, and the mouth of the pressure gauge 8 moves out of the installation groove 71, and the abutment spring 76 pushes the opening and closing ball 75 to move toward the side of the pressure gauge 8, and then pushes the abutment rod 73 and the ejector rod 70 to move toward the side of the pressure gauge 8 until the opening and closing ball 75 abuts against the intersection corner between the annular groove 74 and the flow channel 6, so that the flow channel 6 can be sealed, so that the pressure gauge 8 can be unscrewed and the flow channel 6 can be closed at the same time, which is convenient for disassembling the pressure gauge 8.

[0048] Reference Figure 2 , and then replace the new pressure gauge 8. When the pressure gauge 8 is screwed into the threaded annular groove 78, the mouth of the pressure gauge 8 is inserted into the installation groove 71, and the push rod 70 and the resistance rod 73 are squeezed toward the side of the opening and closing ball 75. The resistance spring 76 is compressed and accumulates force, and the opening and closing ball 75 leaves the intersection corner between the annular groove 74 and the flow channel 6. The hydraulic oil can thus enter the flow channel 6 from the annular groove 74, and then enter the installation groove 71 along the liquid outlet notch 72. The pressure gauge 8 can thus detect the oil pressure, so that the flow channel 6 can be opened while the pressure gauge 8 is installed, reducing the steps required to turn off the pressure gauge 8 switch, which is conducive to convenient and quick replacement and installation of the pressure gauge 8.

[0049] Reference Figure 2 and Figure 3 A sealing ring groove 77 is provided on the side of the opening and closing ball 75 close to the abutment rod 73, and the intersection corner between the annular groove 74 and the flow channel 6 is abutted against the sealing ring groove 77, and the length of the push rod 70 extending into the threaded ring groove 78 is greater than the depth of the sealing ring groove 77; the sealing ring groove 77 is abutted against the intersection corner between the annular groove 74 and the flow channel 6, thereby increasing the contact area between the sealing ring groove 77 and the flow channel 6, which is beneficial to improving the effect of the opening and closing ball 75 in sealing the flow channel 6 and reducing the possibility of oil leakage when the pressure gauge 8 is replaced.

[0050] Reference Figure 2 A limit block 60 is provided on the side wall of the flow channel 6 and on one side close to the opening and closing ball 75. The inner diameter of the limit block 60 is smaller than the diameter of the flow channel 6. The limit block 60 contacts the side of the push rod 70 close to the resistance rod 73. When the push rod 70 pushes the resistance rod 73 to move, the limit block 60 limits the position of the push rod 70, which helps to reduce the possibility of excessive squeezing of the resistance rod 73 on the resistance spring 76, thereby protecting the resistance spring 76 and reducing the possibility of failure of the resistance spring 76.

[0051] Reference Figure 2Since the dial of the pressure gauge 8 may be deflected from the human body when the pressure gauge 8 is screwed onto the oil tank, making it inconvenient for people to observe the dial of the pressure gauge 8, an abutment block 17 is provided on the outer wall of the cylinder 1 and close to the side of the pressure gauge 8, and a nut 11 threadedly connected to the external thread 10 is provided on the outer wall of the cylinder 1, the end wall of the nut 11 abuts against the abutment block 17, and a tightening gasket 12 is provided on the side of the nut 11 away from the abutment block 17.

[0052] Reference Figure 2 An annular notch 13 is provided on the outer wall of the cylinder 1 and between the abutment block 17 and the ejector pin 2, and a sealing notch 14 is provided on the inner wall of the nut 11 to communicate with the annular notch 13. A sealing cavity 15 is formed in the annular notch 13 and the sealing notch 14. A sealing ring 16 is provided in the sealing cavity 15. The height of the sealing ring 16 is less than the height of the sealing cavity 15, which is convenient for the rotation of the nut 11; when it is necessary to adjust the direction of the pressure gauge 8, the cylinder 1 is rotated to adjust the direction of the dial of the pressure gauge 8, and then the nut 11 is rotated, and the tightening gasket 12 is pressed against the oil tank through the nut 11, so that the direction of the dial of the pressure gauge 8 can be adjusted conveniently and quickly, and it is convenient for people to observe the pressure gauge 8; when tightening the nut 11, the tightening gasket 12 is used to tighten the oil tank, and the nut 11 and the cylinder 1 are sealed through the sealing ring 16, so that the possibility of oil leakage can be reduced.

[0053] The implementation principle of the above embodiment is: first remove the pressure gauge 8, close the flow channel 6 through the self-closing component 7, and then install a new pressure gauge 8. The pressure gauge 8 drives the self-closing component 7 to open the flow channel 6, thereby improving the convenience of removing and replacing the pressure gauge 8.

[0054] Embodiment 2:

[0055] An adjustable self-closing pressure gauge 8 valve, refer to Figure 4 and Figure 5 Based on Example 1, the difference between this embodiment and Example 1 is that: the cylinder body 1 includes a fixed cylinder 18 connected to the pressure gauge 8 and a connecting cylinder 19 threadedly connected to the oil tank, a connecting ring groove 100 is provided on the side of the fixed cylinder 18 close to the connecting cylinder 19, and a ring piece 101 screwed into the connecting ring groove 100 is provided on the side of the connecting cylinder 19 close to the fixed cylinder 18; it is convenient to connect the connecting cylinder 19 and the fixed cylinder 18.

[0056] Reference Figure 5 and Figure 6, when the opening and closing ball 75 is used for a long time, when the resistance rod 73 squeezes the opening and closing ball 75, the opening and closing ball 75 is easy to rotate, and the intersection corner between the annular groove 74 and the flow channel 6 is easy to disengage from the sealing ring groove 77, resulting in a decrease in the effect of the opening and closing ball 75 in sealing the flow channel 6, and oil leakage is easy to occur when the pressure gauge 8 is disassembled; therefore, a positioning notch 102 is provided on the inner side wall of the fixed cylinder 18 close to the connecting cylinder 19, and a connecting ring block 103 is provided in the positioning notch 102. A plurality of mounting grooves 104, preferably three, are provided on the inner side wall of the connecting ring block 103 and along its circumference. A mounting spring 105 is provided in the mounting groove 104, and a positioning block 106 is provided at one end of the mounting spring 105 away from the bottom wall of the mounting groove 104. A positioning groove 107 for inserting the positioning block 106 is provided on the side wall of the opening and closing ball 75.

[0057] Reference Figure 5 and Figure 6 , a plurality of supporting springs 108 are provided on the side of the connecting ring block 103 close to the ejector pin 2, and the side of the supporting spring 108 away from the connecting ring block 103 contacts the top wall of the connecting tube 19; during installation, first squeeze the positioning block 106, the installation spring 105 is compressed and stored, the positioning block 106 is inserted into the positioning groove 107, and then the connecting ring block 103 is inserted into the positioning notch 102, and at the same time, the opening and closing ball 75 contacts the intersection corner between the annular groove 74 and the flow channel 6, and then the ring piece 101 is screwed into the connecting ring groove 100, and the connecting tube 19 is connected to the fixed tube 18, and the supporting spring 108 contacts the end wall of the connecting tube 19, so that the connecting tube 19, the fixed tube 18 and the opening and closing ball 75 can be installed conveniently and quickly.

[0058] Reference Figure 5 and Figure 6 When in use, the positioning block 106 is inserted into the positioning groove 107. When the resistance rod 73 squeezes the opening and closing ball 75, the support spring 108 is compressed and stores force at the same time, thereby driving the connecting ring block 103, the positioning block 106 and the opening and closing ball 75 to move downward at the same time, thereby reducing the possibility of the opening and closing ball 75 rotating and reducing the possibility of the opening and closing ball 75 sealing the flow channel 6 The possibility of reduction.

[0059] Reference Figure 5 and Figure 6 After long-term use, the resistance spring 76 fails and the resistance spring 76 cannot close the flow channel 6 with the opening and closing ball 75. At this time, the connecting ring block 103 is pushed to move by the support spring 108, thereby driving the opening and closing ball 75 to move. The support spring 108 and the resistance spring 76 support the opening and closing ball 75 at the same time, reducing the possibility that the opening and closing ball 75 cannot seal the flow channel 6.

[0060] Reference Figure 5 and Figure 6Since the ring piece 101 is threadedly connected to the connecting ring groove 100, oil leakage is likely to occur between the connecting cylinder 19 and the fixed cylinder 18. A positioning ring groove 109 is provided on the top wall of the connecting cylinder 19, and the positioning ring groove 109 is connected to the positioning notch 102. An installation notch 114 is provided on one side of the fixed cylinder 18 close to the connecting cylinder 19, and the installation notch 114 is connected to the positioning notch 102 and the connecting ring groove 100.

[0061] Reference Figure 5 and Figure 6 A plug plate 110 inserted into the positioning ring groove 109 is provided on the side of the connecting ring block 103 close to the ejector pin 2, and a sliding space 111 for the plug plate 110 to move is reserved between the plug plate 110 and the bottom wall of the positioning ring groove 109, a rubber pad 112 is provided on the bottom wall of the positioning ring groove 109, and an annular spring 113 is reserved between the rubber pad 112 and the plug plate 110; the connecting ring block 103 is supported by the annular spring 113, and the opening and closing ball 75 can be supported, thereby reducing the possibility that the opening and closing ball 75 cannot seal the flow channel 6 due to the failure of the interference spring 76.

[0062] Reference Figure 5 and Figure 6 , the side of the rubber pad 112 away from the annular spring 113 extends out of the positioning ring groove 109 and extends into the installation notch 114, and the side of the rubber pad 112 extending into the installation notch 114 extends into the connecting ring groove 100 and conflicts with the ring sheet 101; when the opening and closing ball 75 is compressed, the flow channel 6 will be filled with hydraulic oil. At this time, the hydraulic oil is easy to leak from the gap between the connecting cylinder 19 and the fixed cylinder 18. The opening and closing ball 75 drives the connecting ring block 103 to move downward, and then can push the plug plate 110 to move downward and squeeze the annular spring 113. The annular spring 113 supports the opening and closing ball 75 and can squeeze the rubber pad 112 at the same time, thereby reducing the possibility of hydraulic oil escaping from the gap between the connecting cylinder 19 and the fixed cylinder 18; and by inserting one side of the rubber pad 112 into the positioning ring groove 109 and the other side into the connecting ring groove 100, the gap between the connecting cylinder 19 and the fixed cylinder 18 can be sealed, further reducing the possibility of leakage between the connecting cylinder 19 and the fixed cylinder 18.

[0063] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. An adjustable self-closing pressure gauge valve, characterized in that: The invention comprises a cylinder (1) connected to an oil tank, wherein an ejector pin (2) is provided at one end of the cylinder (1) close to the oil tank, a through groove (4) connected to the oil tank is provided in the ejector pin (2), a flow channel (6) connected to the through groove (4) is provided in the cylinder (1), a self-closing component (7) for closing the flow channel (6) is sleeved on the ejector pin (2), and a pressure gauge (8) for driving the self-closing component (7) to open the flow channel (6) is connected to the side of the cylinder (1) away from the ejector pin (2), and the self-closing component (7) comprises a push rod (70) slidably arranged in the flow channel (6), the outer side wall of the push rod (70) contacts the flow channel (6), the end wall of the push rod (70) is provided with a mounting groove (71) for inserting the nozzle of the pressure gauge (8), the side wall of the push rod (70) is provided with a liquid outlet notch (72) for the flow of hydraulic oil, the liquid outlet notch (72) is connected to the mounting groove (71), and the end of the push rod (70) away from the mounting groove (71) is provided with a resistance rod (73); An annular groove (74) for the ejector pin (2) to be screwed into is provided at one end of the flow channel (6) away from the pressure gauge (8), a start / stop ball (75) is rotatably provided in the annular groove (74), a junction corner between the annular groove (74) and the flow channel (6) is arranged to abut against the start / stop ball (75), a resistance spring (76) is provided between the start / stop ball (75) and the ejector pin (2), and a side of the start / stop ball (75) away from the resistance spring (76) abuts against the resistance rod (73); The cylinder body (1) comprises a fixed cylinder (18) connected to the pressure gauge (8) and a connecting cylinder (19) threadedly connected to the oil tank, a connecting ring groove (100) being provided on a side of the fixed cylinder (18) close to the connecting cylinder (19), and a ring sheet (101) being screwed into the connecting ring groove (100) being provided on a side of the connecting cylinder (19) close to the fixed cylinder (18); A positioning notch (102) is provided on the inner side wall of the fixing cylinder (18) on the side close to the connecting cylinder (19), a connecting ring block (103) is provided in the positioning notch (102), a plurality of mounting grooves (104) are provided on the inner side wall of the connecting ring block (103), a mounting spring (105) is provided in the mounting groove (104), a positioning block (106) is provided at one end of the mounting spring (105) away from the bottom wall of the mounting groove (104), and a positioning groove (107) for inserting the positioning block (106) is provided on the side wall of the opening and closing ball (75); A plurality of support springs (108) are provided on a side of the connecting ring block (103) close to the ejector pin (2), and a side of the support spring (108) away from the connecting ring block (103) contacts the top wall of the connecting cylinder (19); A tip (5) is provided at one end of the ejector pin (2), an end of the ejector pin (2) away from the tip (5) extends out of the cylinder (1), and a side of the resisting spring (76) away from the opening and closing ball (75) is sleeved on the tip (5).

2. The adjustable self-closing pressure gauge valve according to claim 1, characterized in that: A sealing ring groove (77) is provided on one side of the opening and closing ball (75) close to the abutment rod (73), and a junction corner between the annular groove (74) and the flow channel (6) is arranged to abut against the sealing ring groove (77).

3. The adjustable self-closing pressure gauge valve according to claim 2, characterized in that: The top wall of the cylinder (1) is provided with a threaded ring groove (78) for screwing the pressure gauge (8) thereinto, and the bottom wall of the threaded ring groove (78) is provided with a positioning groove (79) connected to the flow channel (6), and a rubber ring (700) is provided in the positioning groove (79), and the rubber ring (700) abuts against the peripheral wall of the ejector rod (70).

4. The adjustable self-closing pressure gauge valve according to claim 1, characterized in that: A limiting block (60) is provided on the side wall of the flow channel (6) close to the opening and closing ball (75), and the limiting block (60) is in contact with a side of the push rod (70) close to the abutment rod (73).

5. The adjustable self-closing pressure gauge valve according to claim 1, characterized in that: An external thread (10) threadably connected to the oil tank is provided on the side wall of the cylinder (1), a nut (11) threadably connected to the external thread (10) is provided on the outer side wall of the cylinder (1), and a tightening gasket (12) is provided on the side of the nut (11) close to the ejector pin (2).

6. The adjustable self-closing pressure gauge valve according to claim 2, characterized in that: An annular notch (13) is provided on the outer wall of the cylinder (1), and a sealing notch (14) is provided on the inner wall of the nut (11) and is communicated with the annular notch (13). The sealing notch (14) and the sealing ring groove (77) form a sealing cavity (15), and a sealing ring (16) is provided in the sealing cavity (15).

7. The adjustable self-closing pressure gauge valve according to claim 5, characterized in that: A resistance block (17) is provided on the outer wall of the cylinder (1) and on a side close to the pressure gauge (8), and the resistance block (17) is in contact with the end wall of the nut (11).

8. The adjustable self-closing pressure gauge valve according to claim 1, characterized in that: A positioning ring groove (109) is provided on the top wall of the connecting tube (19); A plug plate (110) inserted into the positioning ring groove (109) is provided on one side of the connecting ring block (103) close to the ejector pin (2); a sliding space (111) for the plug plate (110) to move is reserved between the plug plate (110) and the bottom wall of the positioning ring groove (109); a rubber pad (112) is provided on the bottom wall of the positioning ring groove (109); and an annular spring (113) is reserved between the rubber pad (112) and the plug plate (110); A mounting notch (114) is provided on a side of the fixing tube (18) close to the connecting tube (19); the mounting notch (114) is connected to the positioning notch (102) and the connecting annular groove (100); a side of the rubber pad (112) away from the annular spring (113) extends out of the positioning annular groove (109) and into the mounting notch (114); a side of the rubber pad (112) extending into the mounting notch (114) extends into the connecting annular groove (100) and contacts the annular sheet (101).

Images