CN214936028U

CN214936028U - Negative pressure pipe for oil gun and oil gun

Info

Publication number: CN214936028U
Application number: CN202023043404.9U
Authority: CN
Inventors: 郑潘澄
Original assignee: Zhejiang Bolai Fluid Equipment Manufacturing Co ltd
Current assignee: Zhejiang Bolai Fluid Equipment Manufacturing Co ltd
Priority date: 2020-12-16
Filing date: 2020-12-16
Publication date: 2021-11-30
Anticipated expiration: 2030-12-16

Abstract

The utility model provides a negative pressure pipe and nozzle for nozzle belongs to refueling equipment technical field, body including the bar, be equipped with the axial through-hole in the body, the aperture of axial through-hole is 0.8~3 mm. The utility model discloses a strict limitation realizes the through-hole aperture of the negative pressure pipe of proclaiming oneself the function with proclaiming oneself the mechanism cooperation to this reliability and sensitivity of proclaiming oneself the function of effectively improving the nozzle, its simple structure, processing and use of being convenient for.

Description

Negative pressure pipe for oil gun and oil gun

Technical Field

The utility model relates to a nozzle technical field especially relates to a negative pressure pipe for nozzle and applied nozzle that has this negative pressure pipe.

Background

The self-sealing oiling device comprises a handle assembly, a gun body and an oil outlet pipe fitting, wherein the gun body is communicated with the oil outlet pipe fitting through a transfer sleeve, a main valve and a self-sealing mechanism are arranged in the gun body and used for controlling oil to pass through, and an auxiliary valve is arranged at the communicating position of the gun body and the oil outlet pipe fitting and used for controlling an outlet of the oil. The oil outlet pipe is also internally provided with a negative pressure pipe for communicating the self-sealing mechanism with an oil tank to be filled with oil.

After the oil gun is started, the handle assembly of the oil gun is opened, and oil passes through the main valve hole, the auxiliary valve and the oil outlet pipe fitting and is output. When oil is added, oil liquid flows through the venturi tube quickly, a low-pressure area is formed in a sealing cavity between the venturi tube and the auxiliary valve seat, one path of the low-pressure area passes through the negative pressure tube to reach an air tap at the front end of the gun barrel, and the other path of the low-pressure area directly reaches the self-sealing mechanism. Once the oil (or the foam generated by the oil) submerges the negative pressure pipe, the self-sealing mechanism closes the oil gun and stops supplying oil.

It can be seen that the importance of the negative pressure tube in the fuel gun is evident. However, in actual production and use, the oil gun partially provided with the negative pressure pipe has the problems that the self-sealing response is not timely and even self-sealing cannot be realized due to the structural defect of the negative pressure pipe or the defect that the negative pressure pipe is communicated with the channel of the self-sealing mechanism.

Based on this, the present application is proposed.

Disclosure of Invention

The utility model provides a to prior art not enough, the utility model provides a novel negative pressure pipe of nozzle and adaptation through improvement structural design, can solve among the prior art because the negative pressure pipe set up the defect and lead to the nozzle to proclaim oneself the slow problem of response speed, improve the sensitivity of proclaiming oneself the function.

In order to achieve the above object, the utility model discloses negative pressure tube structure for nozzle is as follows: the pipe body including the bar, be equipped with axial through-hole in the body, axial through-hole's aperture is 0.8~3 mm. The utility model discloses "negative pressure pipe" can't use independently and realize refueling, jump the rifle and proclaim oneself the scheduling function, so when it need install in the nozzle described below, with the cooperation of the relevant mechanism on the nozzle: in the following, one end of the tube of the negative pressure tube in the above structure is connected to the through hole of the adapter sleeve, and indirectly communicates with the self-sealing mechanism through the adapter sleeve. The smooth and easy of passageway is guaranteed through this transfer station of adapter sleeve to this self-sealing problem that leads to when overcoming the passageway that negative pressure pipe intercommunication self-sealing mechanism among the prior art and having the defect. Meanwhile, the specific aperture of the negative pressure tube not only keeps the air circulation between the air pressure chamber of the self-sealing mechanism and the oil tank to be refueled, but also limits the volume of the axial through hole, so that the air quantity among the air pressure chamber of the self-sealing mechanism, the negative pressure tube and the oil tank to be refueled can be controlled in a proper small range, and the self-sealing sensitivity can be improved to a certain extent.

The utility model discloses further set up as follows: the pipe body comprises a straight pipe section I, a connecting section and a straight pipe section II, the connecting section is arc-shaped, arc-shaped transition is adopted between the connecting section and the straight pipe section I as well as between the connecting section and the straight pipe section II, the shape characteristics of the oil gun pipe fitting are adapted, meanwhile, the situation that the bent part of the negative pressure pipe is not smooth in ventilation due to bending is avoided, the smooth performance of gas circulation inside the negative pressure pipe is ensured, the circulation of air between the air pressure chamber of the self-sealing mechanism and an oil tank to be oiled is ensured, and the situation that the oil tank cannot be self-sealed due to air blockage of the negative pressure pipe after being filled with the oil tank is avoided.

For the patency of ensureing the circulation of air, the utility model discloses further set up as follows: the included angle of arc transition between the connecting section and the straight pipe section I and between the connecting section and the straight pipe section II is 20-30 degrees.

The utility model discloses further set up as follows: the included angle that the connecting section all adopts the arc transition between with straight tube section one, straight tube section two is 25.

The utility model discloses further set up as follows: the diameter of the axial through hole is 1-2 mm.

The utility model discloses further set up as follows: the diameter of the axial through hole is 1.2-1.8 mm.

Another object of the utility model is to provide a nozzle, including the rifle body, oil pipe spare, handle components, be equipped with any kind of negative pressure pipe of above-mentioned among the negative pressure pipe.

By applying the negative pressure pipe for the oil gun, the normal realization of the self-sealing function of the oil gun can be effectively ensured, the reliability of the self-sealing function is improved, and the sensitivity of the self-sealing function is also improved.

The fuel nozzle is further arranged as follows: the oil outlet pipe fitting is arranged at the front end of the gun body, a transfer sleeve is connected between the oil outlet pipe fitting and the gun body, and a through hole which can be communicated with an air pressure chamber of the self-sealing mechanism is formed in the transfer sleeve. One end of the negative pressure pipe is arranged at the front end part of the oil outlet pipe fitting, and the other end of the negative pressure pipe is fixedly connected with the through hole of the adapter sleeve. The negative pressure pipe and the self-sealing mechanism are communicated through the adapter sleeve, on one hand, the original structure of the adapter sleeve is utilized, and the problem that the structure of the oil gun is complicated due to the addition of parts or other structures is avoided while the communication destination is realized; on the other hand, the structure is simple and convenient to connect and assemble.

The fuel nozzle is further arranged as follows: the opening of one end of the negative pressure pipe is positioned on the side wall of the front end part of the oil outlet pipe fitting, and the distance between the negative pressure pipe and the end part of the oil outlet pipe fitting is prolonged, so that the situation that foam generated by oil in a mailbox blocks the opening of one side of the negative pressure pipe in an oil tank in the oiling process to cause the self-sealing gun jump of the oiling gun can be reduced.

To further ensure the technical effect, the fuel nozzle is further provided with the following components: the distance between the opening and the front end face of the oil outlet pipe fitting is 10-30 mm.

The utility model has the advantages as follows:

one, the utility model discloses a strict limitation is with proclaiming oneself the mechanism and realize proclaiming oneself the through-hole aperture of the negative pressure pipe for the nozzle of function through the switching cover intercommunication, effectively improves reliability and the sensitivity of proclaiming oneself the function of nozzle to adapt to actual use needs.

Two, the utility model discloses structural change is little, does not relate to simultaneously yet, does not influence the structure or the assembly relation of all the other parts of nozzle, is convenient for process and assembly.

Drawings

Fig. 1 is a schematic view of a using state of a negative pressure tube for an oil gun according to an embodiment of the present invention.

Fig. 2 is the utility model discloses embodiment negative pressure pipe structure schematic diagram for nozzle.

Reference numerals: 1-oil outlet pipe fitting, 2-negative pressure pipe, 3-switching cover, 201-axial through hole, 201 a-outer opening, 201 b-inner opening.

Detailed Description

Embodiment 1 this embodiment provides a negative pressure pipe 2 for nozzle, including the body of bar, is equipped with axial through hole 201 in the body, and the body of bar comprises straight tube section L1, arc linkage segment L2 and straight tube section two L3, all adopts the arc transition between arc linkage segment L2 and straight tube section one L1, straight tube section two L3 to the air flow of being more convenient for. In order to effectively maintain the quick realization of the self-sealing function of the self-sealing mechanism of the oil gun, the aperture R of the axial through hole 201 needs to be 0.8-3 mm.

Preferably, the aperture R of the axial through hole 201 can adopt any value between 0.8mm and 2mm, for example: 0.8mm, 0.9mm, 1mm, 1.1mm, 1.2mm, 1.3, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2.0mm, which is particularly suitable for the oil gun with the flow rate range of 15-40L/min and 25-60L/min. Or the aperture R of the axial through hole 201 is any value between 2.1 mm and 3mm, for example: when the flow rate is 2.2mm, 2.4mm, 2.6mm, 2.8mm or 3.0mm, the flow rate is more suitable for the oil gun with the flow rate range of 32-120L/min.

In the effective range of the restrictive aperture provided by this embodiment, the axial through hole 201 can keep its own unobstructed property, and at the same time, the volume of the negative pressure tube 2 formed by the self-sealing mechanism and the negative pressure tube 2 can be limited to a proper size, so that the change of the air pressure in the negative pressure tube 2 can be quickly sensed by the self-sealing mechanism, thereby ensuring the response speed of the self-sealing mechanism and improving the sensitivity of the self-sealing mechanism.

Example 2 this example differs from example 1 in that: in this embodiment, the included angle β of the arc-shaped connecting section L2 is 20 ° -30 °, and any value in the range can be adopted for the specific angle, which is simply listed as follows: 21.5 °, 22.5 °, 23.5 °, 24.5 °, 25 °, 25.5 °, 26 °, 27.5 °, 28 °, etc.

Under the angle range, on one hand, the negative pressure pipe 2 can be attached to the oil outlet pipe fitting 1 of the oil gun in shape, and the obstruction of the negative pressure pipe 2 to the flowing of oil liquid is reduced; on the other hand, the sensitivity of the self-sealing mechanism can be enhanced by maintaining a high degree of smoothness of the flow of the gas in the negative pressure tube 2.

Embodiment 3 this embodiment provides a fuel nozzle, which includes a nozzle body, a fuel outlet pipe fitting 1, a handle assembly, and a negative pressure pipe 2 as described in embodiment 1 or embodiment 2, wherein the specific structures of the nozzle body, the fuel outlet pipe fitting 1, the handle assembly, and other components are the same as those in the prior art, and for clarity, the structure of the fuel outlet pipe fitting 1 will be described in detail below with reference to fig. 1 in this embodiment: the oil outlet pipe fitting 1 is arranged at the front end of the gun body, the oil outlet pipe fitting 1 is in sealing connection with the gun body through a transfer sleeve 3, and a through hole which can be communicated with an air pressure chamber of the self-sealing mechanism is formed in the transfer sleeve 3. Therefore, the front end of the gun body is provided with a mounting cavity special for being mounted in a matched mode with the adapter sleeve 3, an auxiliary valve used for controlling the on-off of the mounting cavity is further arranged in the mounting cavity, and after the adapter sleeve 3 is assembled, the auxiliary valve is arranged adjacent to the adapter sleeve 3. In this embodiment, the negative pressure pipe 2 is disposed inside the oil outlet pipe fitting 1, the axial through hole 201 in the negative pressure pipe 2 has an inner opening 201b and an outer opening 201a, one end of the outer opening 201a is disposed at the front end of the oil outlet pipe fitting 1, and the other end of the inner opening 201b is fixedly connected to the through hole of the adapter sleeve 3. A gap is reserved between the outer wall of the adapter sleeve 3 and the inner wall of the mounting cavity of the gun body, the through hole in the adapter sleeve 3 is communicated with the gap, and the gap is communicated with the air pressure chamber in the self-sealing mechanism through a channel arranged on the gun body, so that the communication between the negative pressure tube 2 and the self-sealing mechanism is finally realized.

In some prior arts, the outer opening 201a of the negative pressure tube 2 is located above the end face of the front end of the oil outlet tube 1, but this structure is easily blocked by oil foam generated in the oil tank to be filled, which results in the self-sealing mechanism starting and improper gun jump, which affects normal oil filling.

Therefore, in addition to the above-described embodiments, another embodiment is provided in which the outer opening 201a of the negative pressure tube 2 is provided on the side wall of the distal end portion of the oil outlet tube 1, and the outer opening 201a is spaced apart from the end surface of the distal end portion of the oil outlet tube 1 by a predetermined distance, so that when the oil mist is generated, the outer opening 201a is spaced apart from the position of the oil in the tank to be supplied, and the oil mist hardly blocks the inner and outer openings 201a, thereby reducing the self-bouncing gun.

Preferably, the distance between the inner opening 201b and the front end face of the oil outlet pipe fitting 1 is 10-30 mm.

To sum up, the utility model provides a negative pressure pipe 2 for nozzle and applied nozzle that has this negative pressure pipe 2 can effectively ensure the normal realization of nozzle self-sealing function, have improved the reliability of self-sealing function, have also improved the sensitivity of self-sealing function simultaneously.

Claims

1. The utility model provides a negative pressure pipe for nozzle which characterized in that: including the body of bar, be equipped with axial through-hole in the body, axial through-hole's aperture is 0.8~3 mm.

2. The negative pressure pipe for a fuel filler gun as claimed in claim 1, wherein: the strip-shaped pipe body is composed of a first straight pipe section, a connecting section and a second straight pipe section, wherein the connecting section is arc-shaped, and the connecting section and the first straight pipe section and the second straight pipe section are in arc-shaped transition.

3. The negative pressure pipe for a fuel filler gun as claimed in claim 2, wherein: the included angle of arc transition between the connecting section and the straight pipe section I and between the connecting section and the straight pipe section II is 20-30 degrees.

4. The negative pressure pipe for a fuel filler gun as set forth in claim 3, characterized in that: the included angle that the connecting section all adopts the arc transition between with straight tube section one, straight tube section two is 25.

5. The negative pressure pipe for a fuel filler gun as claimed in any one of claims 1 to 4, wherein: the diameter of the axial through hole is 1-2.5 mm.

6. The negative pressure pipe for a fuel filler gun as set forth in claim 5, wherein: the diameter of the axial through hole is 1.2-2 mm.

7. The utility model provides a nozzle, includes the rifle body, goes out oil pipe spare, handle assembly, its characterized in that: the oil outlet pipe is internally provided with a negative pressure pipe for the oil filling gun according to any one of claims 1 to 6.

8. The fuel nozzle as set forth in claim 7, wherein: the oil outlet pipe fitting is arranged at the front end of the gun body, a transfer sleeve is connected between the oil outlet pipe fitting and the gun body, and a through hole which can be communicated with an air pressure chamber of the self-sealing mechanism is formed in the transfer sleeve; one end of the negative pressure pipe is arranged at the front end part of the oil outlet pipe fitting, and the other end of the negative pressure pipe is fixedly connected with the through hole of the adapter sleeve.

9. The fuel nozzle as set forth in claim 8, wherein: the opening of one end of the negative pressure pipe is positioned on the side wall of the front end part of the oil outlet pipe fitting.

10. The fuel nozzle as set forth in claim 9, wherein: the distance between the opening and the front end face of the oil outlet pipe fitting is 10-30 mm.