Spray gun with throttling device for monkey machine

Abstract

The utility model discloses a spray gun with a throttling device for a monkey machine, which is used for the monkey machine and comprises a spray gun and the throttling device which are sequentially connected from front to back, the spray gun comprises a gun body, a thimble and a nozzle; a horizontal channel penetrating front and back is formed in the gun body. The nozzle is positioned at the front end of the gun body; the ejector pin can be used for moving back and forth in the horizontal channel and can open or close an outlet of the nozzle by moving back and forth; the throttling device comprises a mounting seat, a double-shaft cylinder, a bumping post and a limiting mechanism; the mounting seat is connected to the rear end of the gun body; the double-shaft cylinder is mounted on the mounting seat; the bumping post is mounted on a first output shaft of the double-shaft cylinder in a front-back moving manner and can be used for being matched with the ejector pin; the limiting mechanism is used for being matched with a second output shaft of the double-shaft air cylinder. The limiting mechanism can be used for limiting the terminal point of the ejector pin when the ejector pin retreats, so that the ejector pin can form a small-flow gear before the nozzle is opened, and then the nozzle is completely opened subsequently, so that the nozzle can gradually spray liquid in two gears, and spraying is natural.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of marbling machine, concretely relates to a marbling machine's spray gun with throttling device. BACKGROUND

[0002] The marbling process can make the jeans present natural fading effect and old feeling, give the subtle gradation on color, and increase the overall texture. The jeans treated by marbling will produce natural gradual change from light to dark, like fading after being sunned, and present the retro color tone of dirty and yellow. In the actual production process, an automatic spray gun is generally used to realize the marbling operation of jeans.

[0003] For the spray gun, the authorized announcement No. CN108435451B discloses an automatic spray gun, which specifically discloses a gun body, a horizontal through pipe arranged in the center of the gun body, a nozzle assembly arranged at the front end of the gun body, a spray width air channel and an atomization air channel arranged on the nozzle assembly, a shunt ring cover arranged between the nozzle assembly and the front end of the gun body, a gas outlet hole arranged on the circular surface of the shunt ring cover and communicated with the spray width air channel, a hollow part of the shunt ring cover corresponding to the position of the horizontal through pipe, a paint control assembly arranged at the rear end of the gun body, a thimble assembly arranged on the horizontal through pipe and controlled by the paint control assembly, a piston cavity formed between the thimble assembly and the rear end of the gun body, and the front end of the thimble assembly inserted into the nozzle assembly; a paint inlet pipe, a main air inlet pipe, a spray width air inlet pipe, and an atomization air inlet pipe arranged on the outer wall of the gun body, the paint inlet pipe communicated with the horizontal through pipe, the main air inlet pipe arranged at the rear end of the gun body and communicated with the piston cavity, the spray width air inlet pipe arranged at the rear end of the gun body and communicated with the piston cavity, the spray width air inlet pipe arranged at the front end of the gun body on the back side of the gas outlet hole after passing through the control knob I, the atomization air inlet pipe arranged at the rear end of the gun body and communicated with the piston cavity, the atomization air inlet pipe arranged at the one side of the front end pipe opening of the horizontal through pipe and communicated with the atomization air channel after passing through the control knob II, the thimble assembly including a thimble pressing member inserted into the horizontal through pipe, a thimble inserted into the thimble pressing member, and a thimble pressing seat for fixing the thimble, the thimble pressing seat arranged at the rear end of the gun body and closing the rear end of the gun body, and the thimble moving horizontally in the horizontal through pipe under the driving of the thimble pressing seat.

[0004] However, for the automatic spray gun described above, although it can achieve the spraying of liquid. However, in the actual use process, when the thimble opens the nozzle pipe, that is, when the thimble moves backward, the thimble is moved to the position at one time in a short time, and there is no second flow rate position to control the flow rate of the liquid. Under this structure, since the thimble is completely opened quickly, it will lead to that the liquid is not sprayed gradually in the process of spraying outward, which will lead to that the spraying of the liquid before the workpiece is not uniform enough, and the transition of the sprayed pattern is not natural enough, and the overall effect needs to be improved.

[0005] Therefore, there is a need to improve the prior art. Content of the utility model

[0006] In view of the problems existing in the prior art, the utility model aims at providing a spray gun with a throttling device for a marking machine, which adds a throttling device to limit the end point of the travel of the ejector pin when it is retracted, so that the ejector pin is in a small flow rate position before the nozzle is fully opened, and then enters a large flow rate position, so that the nozzle gradually sprays liquid in multiple positions, ensures the uniformity of the liquid sprayed on the workpiece, and makes the spraying effect transition naturally and the spraying quality better.

[0007] In order to achieve the above-mentioned purpose, the technical scheme of the utility model is:

[0008] A spray gun with a throttling device for a marking machine, which is used in a marking machine and comprises a spray gun and a throttling device connected in sequence from front to back; the spray gun comprises a gun body, an ejector pin and a nozzle; the gun body has a horizontal channel penetrating from front to back inside the gun body; the nozzle is located at the front end of the gun body; the ejector pin is movable in the horizontal channel and can open or close the outlet of the nozzle by moving forward and backward; the throttling device comprises a mounting seat, a double-shaft air cylinder, a blocking column and a limiting mechanism; the mounting seat is connected to the rear end of the gun body; the double-shaft air cylinder is installed on the mounting seat; the blocking column is movably installed on the first output shaft of the double-shaft air cylinder and can cooperate with the ejector pin; the limiting mechanism cooperates with the second output shaft of the double-shaft air cylinder; the limiting mechanism can limit the end point of the travel of the ejector pin when it is retracted, so that the ejector pin forms a small flow rate position before the nozzle is opened, and then fully opens the nozzle, so that the nozzle gradually sprays liquid in two positions, thereby ensuring the uniformity of the liquid sprayed on the workpiece.

[0009] Further, the limiting mechanism comprises a blocking block, a connecting rod, a first limiting block and a second limiting block; the blocking block is located behind the mounting seat and fixed to the mounting seat; the connecting rod is installed on the second output shaft of the double-shaft air cylinder; the first limiting block is installed on the blocking block and the connecting rod passes through the first limiting block; when the second output shaft of the double-shaft air cylinder moves backward, the front end of the first limiting block can limit the end point of the travel of the second output shaft of the double-shaft air cylinder when it moves backward; the second limiting block is located behind the blocking block and connected to the connecting rod, and the front end of the second limiting block can limit the end point of the travel of the second output shaft of the double-shaft air cylinder when it moves forward.

[0010] Further, the first limiting stopper is in the shape of T in cross section, the rear end of the first limiting stopper is installed in the through hole of the stopper, and the front end of the first limiting stopper abuts against the front end surface of the stopper; the width of the second output shaft of the double-shaft air cylinder is greater than the width of the central hole of the first limiting stopper. Through the above arrangement, the first limiting stopper can be conveniently installed on the stopper.

[0011] Further, a first positioning threaded hole is arranged on the outer side surface of the stopper, a first bolt is threadedly connected in the first positioning threaded hole, the inner end of the first bolt abuts against the outer wall surface of the first limiting stopper to position the first limiting stopper, and the first limiting stopper can be fixed or loosened on the stopper by screwing the first bolt inward or outward, so that the position of the first limiting stopper in the through hole can be adjusted forward and backward. Through the above arrangement, the position of the first limiting stopper can be conveniently and quickly adjusted.

[0012] Further, the second limiting stopper is sleeved on the connecting rod, and the width of the second limiting stopper is greater than the width of the through hole of the stopper. Through the above arrangement, the advancing terminal point of the two output shafts of the double-shaft air cylinder can be limited.

[0013] Further, a second positioning threaded hole is arranged on the outer side surface of the second limiting stopper, a second bolt is threadedly connected in the second positioning threaded hole, the inner end of the second bolt abuts against the outer wall surface of the connecting rod to position the second limiting stopper, and the second limiting stopper can be fixed or loosened on the connecting rod by screwing the second bolt inward or outward, so that the position of the second limiting stopper on the connecting rod can be adjusted forward and backward. Through the above arrangement, the position of the second limiting stopper can be conveniently and quickly adjusted.

[0014] Further, the connecting rod is a bolt, and the rod portion of the connecting rod is connected with the second output shaft of the double-shaft air cylinder and passes through the first limiting stopper. Through the above arrangement, the connecting rod can be conveniently disassembled.

[0015] Further, a fixing rod is connected between the mounting seat and the stopper, and the two ends of the fixing rod are respectively connected with the mounting seat and the stopper. The arrangement of the fixing rod can ensure the stability between the mounting seat and the stopper, and also facilitates the installation of the stopper.

[0016] Further, the double-shaft air cylinder is a synchronous double-shaft air cylinder, so that the first output shaft and the second output shaft of the double-shaft air cylinder can realize synchronous forward and backward movement.

[0017] Further, the spray gun and the throttling device are both provided with two in parallel.

[0018] The beneficial effects of the utility model are as follows:

[0019] The utility model discloses a limiting mechanism is set up, thereby can utilize the limiting mechanism to limit the stroke end of the ejector pin when retreating, can utilize the baulk to make the ejector pin be in a small flow gear before the nozzle is opened completely, then drive the baulk again to the back, make liquid spray out again in large flow, that is, at this time, it is in the large flow gear, through the setting of the two gears, make the nozzle can gradually more liquid spray, thereby can guarantee the uniformity when liquid is sprayed on work piece, and the spraying effect is transition natural, also can make the quality of spraying better.

[0020] Therefore, in the process of opening the nozzle, the ejector pin will not retreat in place at one time, but will first retreat to a certain distance according to the restriction of the baulk after moving forward, that is, the ejector pin is in the first gear at this time, and the nozzle outlet will not be completely opened at this time, and the liquid will be sprayed in a small amount; then, the baulk is driven backward again, and the ejector pin can also move backward correspondingly because of the absence of restriction, so that the liquid flow is gradually increased with the backward movement of the ejector pin to change to the second gear. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is the overall structure schematic of the utility model Figure 1 ;

[0022] Figure 2 It is the overall structure schematic of the utility model Figure 2 ;

[0023] Figure 3 It is the explosion drawing of the utility model;

[0024] Figure 4 It is the overall structure schematic of the utility model Figure 3 ;

[0025] Figure 5 It is Figure 4 the sectional view along A-A in

[0026] REFERENCE NUMERALS

[0027] 1, spray gun;11, gun body;12, ejector pin;13, nozzle;14, horizontal channel;

[0028] 2, throttling device;21, mounting seat;22, double-shaft air cylinder;221, first output shaft;222, second output shaft;23, baulk;24, limiting mechanism;241, baffle;2411, through hole;2412, first positioning screw hole;242, connecting rod;243, first limiting stop;244, second limiting stop;2441, second positioning screw hole;245, first bolt;246, second bolt;25, fixed rod. DETAILED DESCRIPTION

[0029] The utility model will be further described below in combination with the drawings and specific embodiments, the following description is only exemplary, and does not limit the protection scope of the utility model.

[0030] As Figures 1-5 The utility model discloses a spray gun with throttling device of marking machine, which is used in marking machine, and it includes spray gun 1 and throttling device 2 connected in sequence.

[0031] Wherein, spray gun 1 includes gun body 11, ejector pin 12 and nozzle 13, there is horizontal passage 14 through front and back in the inside of gun body 11, nozzle 13 is located at the front end of gun body 11, ejector pin 12 can be used to move front and back in horizontal passage 14 and it can open or close the outlet of nozzle 13 by moving front and back. Of course, for this spray gun 1, it also has other structures, for example, it has the passage for entering liquid and the air inlet for entering gas to push ejector pin 12 to move back and the reset spring for the forward reset of ejector pin 12, but since the structure of these parts is prior art, specific reference can be made to the authorized announcement No. CN108435451B discloses an automatic spray gun, in addition, these structures are not the focus of the corresponding technical solutions proposed by the present application to solve the technical problems, therefore, here will not be specifically described again.

[0032] Preferably, throttling device 2 includes mounting seat 21, double-shaft air cylinder 22, blocking column 23 and limiting mechanism 24.

[0033] As Figures 1-5 Indicated, wherein mounting seat 21 is connected at the rear end of gun body 11, double-shaft air cylinder 22 is installed on mounting seat 21, blocking column 23 is movably installed on the first output shaft 221 of double-shaft air cylinder 22 and can be used to cooperate with ejector pin 12, limiting mechanism 24 is used to cooperate with the second output shaft 222 of double-shaft air cylinder 22.

[0034] In use, limiting mechanism 24 can be used to limit the end point of ejector pin 12 when retreating, so that ejector pin 12 can form a small flow rate position before opening nozzle 13, and then completely open nozzle 13 subsequently, so that nozzle 13 can gradually spray liquid in two positions, thereby ensuring the uniformity of liquid spraying on the workpiece.

[0035] In summary, the utility model discloses a limiting mechanism 24 is set up, thereby can utilize the limiting mechanism to limit the stroke end of the ejector pin 12 when retreating, and specifically can utilize the blocking column 23 to make the ejector pin 12 be in a small flow gear before the nozzle 13 is completely opened, then again through the backward drive blocking column 23, make liquid spray out again in large flow, namely at this time in large flow gear, through the setting of the two gears, make the nozzle 13 can gradually more liquid spray, thereby can guarantee the uniformity of liquid spray on workpiece, and the spraying effect is transition natural, also can make the quality of spraying better.

[0036] As Figures 1-5 The utility model discloses a limiting mechanism 24 includes the blocking piece 241, the connecting rod 242, the first limiting stop piece 243 and the second limiting stop piece 244, the blocking piece 241 is located the rear of the mounting seat 21 and is fixed with the mounting seat 21, the connecting rod 242 is installed on the second output shaft 222 of double axle pneumatic cylinder 22, the first limiting stop piece 243 is installed on the blocking piece 241 and the connecting rod 242 is set in the first limiting stop piece 243, when the second output shaft 222 of double axle pneumatic cylinder 22 moves back, the front end of the first limiting stop piece 243 can be used to limit the end point of the second output shaft 222 of double axle pneumatic cylinder 22 when retreating, guarantee the position of blocking column 23, also guarantee that the ejector pin 12 will not exceed the preset retreat end point when retreating, the second limiting stop piece 244 is located the rear of the blocking piece 241 and is connected on the connecting rod 242, and the front end of the second limiting stop piece 244 can be used to limit the end point of the second output shaft 222 of double axle pneumatic cylinder 22 when advancing, specifically can make blocking column 23 advance several distances, like this, make blocking column 23 can limit the ejector pin 12, so that the ejector pin 12 will not directly retreat all distance when retreating. Therefore, utilize the above design, make the first limiting stop piece 243 and the second limiting stop piece 244 in limiting mechanism 24 can realize the limiting of the two output shafts of double axle pneumatic cylinder 22, so as to control the position of blocking column 23, and then can control the retreat end point of the ejector pin 12.

[0037] As Figures 1-5As shown, preferably, the first limiting stop 243 has a "T" shaped cross section; the rear end of the first limiting stop 243 is installed in the through hole 2411 of the block 241, and the front end abuts against the front end face of the block 241; the width of the second output shaft 222 of the double shaft air cylinder 22 is greater than the width of the central hole of the first limiting stop 243. In addition, for the convenience of use, a nut for cooperating with the first limiting stop 243 can also be installed on the second output shaft 222, so as to avoid the direct contact between the second output shaft 222 and the first limiting stop 243 during the movement of the second output shaft 222, thereby reducing the wear of the second output shaft 222. Therefore, the first limiting stop 243 with the above-mentioned "T" shaped cross section structure can be conveniently installed on the block 241. In addition, since the width of the second output shaft 222 is greater than the width of the central hole of the first limiting stop 243, the second output shaft 222 can be blocked during the backward movement of the second output shaft 222, so as to avoid the embedding of the second output shaft 222 into the central hole of the first limiting stop 243.

[0038] As shown in Figures 1-5 In order to conveniently adjust the position of the first limiting stop 243, a first positioning threaded hole 2412 is arranged on the outer side face of the block 241; a first bolt 245 is threadedly connected in the first positioning threaded hole 2412, and the inner end of the first bolt 245 abuts against the outer wall face of the first limiting stop 243, so as to position the first limiting stop 243. During use, by screwing the first bolt 245 inwardly or outwardly, the fixation or loosening of the first limiting stop 243 on the block 241 can be realized, so as to adjust the position of the first limiting stop 243 in the through hole 2411. Therefore, the position of the first limiting stop 243 can be conveniently and quickly adjusted by the above-mentioned arrangement. In addition, by correspondingly adjusting the position of the first limiting stop 243, the second output shaft 222 of the double shaft air cylinder 22 can be blocked at different positions, for example, if the position of the first limiting stop 243 is adjusted forwardly by a certain distance, the second output shaft 222 of the double shaft air cylinder 22 can only move to abut against the front end face of the first limiting stop 243, that is, because of the adjustment of the position of the first limiting stop 243, the backward end point of the second output shaft 222 can be changed, and the backward end point of the block 23 is also changed, so that the position of the ejector pin 12 during the backward movement is changed; similarly, the backward position of the ejector pin 12 can also be changed by adjusting the first limiting stop 243 backwardly by a certain distance, which will not be described in detail here.

[0039] As shown in Figures 1-5As shown, preferably, the second limiting stop 244 is fitted onto the connecting rod 242; the width of the second limiting stop 244 is greater than the width of the through hole 2411 of the stop block 241, so that the second limiting stop 244 will not be embedded in the through hole 2411 during the forward movement, thereby ensuring that the second limiting stop 244 can limit the forward end point of the two output shafts of the dual-shaft cylinder 22.

[0040] like Figures 1-5 As shown, specifically, a second positioning threaded hole 2441 is provided on the outer surface of the second limiting stop 244; a second bolt 246 is threaded into the second positioning threaded hole 2441, and the inner end of the second bolt 246 abuts against the outer wall surface of the connecting rod 242 to position the second limiting stop 244; by turning the second bolt 246 inward or outward, the second limiting stop 244 can be fixed or loosened on the connecting rod 242, so as to adjust the position of the second limiting stop 244 on the connecting rod 242 back and forth. Therefore, the position of the second limiting stop 244 can be adjusted conveniently and quickly through the above arrangement. Furthermore, by adjusting the position of the second limit stop 244 accordingly, the stop column 23 can be limited at different positions. For example, if the position of the second limit stop 243 is adjusted forward by a certain distance, the stop column 23 will reach its end point when the output shaft of the dual-shaft cylinder 22 moves forward until the second limit stop 244 hits the stop block 241. Thus, the forward end point of the stop column 23 can be changed by changing the position of the second limit stop 244. Similarly, adjusting the second limit stop 244 backward by a certain distance has the same effect and can change the forward position of the stop column 23. This will not be elaborated further here.

[0041] In this embodiment, in order to facilitate the disassembly and assembly of the connecting rod 242, the connecting rod 242 is a bolt and its rod part is connected to the second output shaft 222 of the dual-shaft cylinder 22 and passes through the first limiting stop 243.

[0042] like Figures 1-3 As shown, in this embodiment, a fixing rod 25 is connected between the mounting base 21 and the stop block 241; the two ends of the fixing rod 25 are respectively connected to the mounting base 21 and the stop block 241. Therefore, the fixing rod 25 can ensure the stability between the mounting base 21 and the stop block 241, and at the same time, it can also facilitate the installation of the stop block 241.

[0043] In this embodiment, the dual-axis cylinder 22 is a synchronous dual-axis cylinder, so that its first output shaft 221 and second output shaft 222 can move back and forth synchronously, which facilitates its use.

[0044] In this embodiment, there are two spray guns 1 and two throttling devices 2 arranged side by side. In addition, the mounting base 21 and the stop block 241 in the two throttling devices 2 can also be designed as an integral piece to simplify the structure.

[0045] The specific use principle of the utility model is introduced as follows, so as to understand the utility model:

[0046] First, the positions of the first limiting stop piece 243 and the second limiting stop piece 244 are properly adjusted; next, the double-shaft air cylinder 22 drives the two output shafts to move forward until the front end surface of the second limiting stop piece 244 abuts against the stop block 241, at this time, the position of the stop column 23 has been preset forward, that is, the first retreat end point of the ejector pin 12 is determined; next, when the outlet of the nozzle 13 needs to be opened, the ejector pin 12 is pushed backward by gas until the ejector pin 12 leaves the outlet of the nozzle 13, at the same time, the liquid to be sprayed, such as potassium permanganate solution, is input into the spray gun 1; next, when the ejector pin 12 abuts against the front end of the stop column 23, the ejector pin 12 stops, at this time, the outlet of the nozzle 13 has not been completely opened, and if the spray gun sprays the liquid, the flow of the liquid will not be too large, that is, at this time, the small flow position is reached, at this time, the spray gun can be used to gradually spray the workpiece; next, after the ejector pin 12 abuts against the stop column 23 and sprays the liquid at the small flow position for a period of time, the double-shaft air cylinder 22 drives the two output shafts to move backward until the rear end of the first output shaft 221 of the double-shaft air cylinder 22 abuts against the first limiting stop piece 243, in this way, the stop column 23 also moves backward by a certain distance, that is, the second retreat end point of the ejector pin 12 is determined; next, the ejector pin 12 is continuously pushed backward by gas until the ejector pin 12 abuts against the stop column 23 again; next, at this time, the ejector pin 12 is completely opened, so that the nozzle 13 can spray the liquid with a larger flow, that is, at this time, the large flow position is reached. When it is desired to close the nozzle, first, the gas pipe for pushing the ejector pin 12 is closed, in this way, in the process of stopping the gas, the ejector pin 12 can be gradually reset forward by the reset device (for example, a reset spring) in the spray gun 1 until the gas is completely stopped, at this time, the ejector pin 12 completely seals the outlet of the nozzle 13, so that the spraying of the liquid is stopped.

[0047] The utility model is not limited to the above-mentioned embodiments, if various modifications or deformation of the utility model do not deviate from the spirit and scope of the utility model, if these modifications and deformation belong to the claim and equivalent technical scope of the utility model, the utility model also intends to include these modifications and deformation.

Claims

1. A spraying gun with throttling device for a painting machine, characterized in that: the spraying gun with throttling device for a painting machine is used in a painting machine, and it comprises a spraying gun and a throttling device connected in sequence; the spraying gun comprises a gun body, a needle and a nozzle; the gun body has a horizontal channel penetrating from front to back inside; the nozzle is located at the front end of the gun body; the needle can move forward and backward in the horizontal channel and can open or close the outlet of the nozzle by moving forward and backward; the throttling device comprises a mounting seat, a double-shaft air cylinder, a blocking column and a limiting mechanism; the mounting seat is connected to the rear end of the gun body; the double-shaft air cylinder is installed on the mounting seat; the blocking column is movably installed on the first output shaft of the double-shaft air cylinder and can cooperate with the needle; the limiting mechanism cooperates with the second output shaft of the double-shaft air cylinder; the limiting mechanism can limit the end point of the needle when it retreats, so that the needle can form a small flow rate position before opening the nozzle, and then completely open the nozzle subsequently, so that the nozzle can gradually spray liquid in two positions, thereby ensuring the uniformity of the liquid sprayed on the workpiece.

2. The spraying gun with throttling device for a painting machine according to claim 1, characterized in that: the limiting mechanism comprises a stop block, a connecting rod, a first limiting stopper and a second limiting stopper; the stop block is located behind the mounting seat and is fixed with the mounting seat; the connecting rod is installed on the second output shaft of the double-shaft air cylinder; the first limiting stopper is installed on the stop block and the connecting rod passes through the first limiting stopper; when the second output shaft of the double-shaft air cylinder moves backward, the front end of the first limiting stopper can limit the end point of the second output shaft of the double-shaft air cylinder when it retreats; the second limiting stopper is located behind the stop block and is connected to the connecting rod, and the front end of the second limiting stopper can limit the end point of the second output shaft of the double-shaft air cylinder when it advances.

3. The spraying gun with throttling device for a painting machine according to claim 2, characterized in that: the cross section of the first limiting stopper is "T" shaped; the rear end of the first limiting stopper is installed in the through hole of the stop block, and the front end abuts against the front end surface of the stop block; the width of the second output shaft of the double-shaft air cylinder is greater than the width of the center hole of the first limiting stopper.

4. The spraying gun with throttling device for a painting machine according to claim 3, characterized in that: a first positioning threaded hole is provided on the outer side surface of the stop block; a first bolt is threadedly connected in the first positioning threaded hole, and the inner end of the first bolt abuts against the outer wall surface of the first limiting stopper to position the first limiting stopper; by screwing the first bolt inward or outward, the first limiting stopper can be fixed or loosened on the stop block, so as to adjust the position of the first limiting stopper in the through hole forward and backward.

5. The spraying gun with throttling device for a painting machine according to claim 3, characterized in that: ​ The second limiting stopper is sleeved on the connecting rod; and the width of the second limiting stopper is greater than the width of the through hole of the stop block.

6. The lance with throttling device of the marinating machine according to claim 5, characterized in that: A second positioning threaded hole is arranged on the outer side surface of the second limiting stopper; a second bolt is threadedly connected in the second positioning threaded hole, and the inner end of the second bolt abuts against the outer wall surface of the connecting rod to position the second limiting stopper; the second limiting stopper can be fixed or loosened on the connecting rod by screwing the second bolt inward or outward, so as to adjust the position of the second limiting stopper on the connecting rod.

7. The lance with throttling device of the marinating machine according to claim 2, characterized in that: The connecting rod is a bolt, and the rod part of the bolt is connected with the second output shaft of the double-shaft air cylinder and is arranged in the first limiting stopper.

8. The lance with throttling device of the marinating machine according to claim 2, characterized in that: A fixing rod is connected between the mounting seat and the stop block; and the two ends of the fixing rod are connected with the mounting seat and the stop block respectively.

9. The lance with throttling device of the marinating machine according to claim 1, characterized in that: The double-shaft air cylinder is a synchronous double-shaft air cylinder, so that the first output shaft and the second output shaft of the double-shaft air cylinder can realize synchronous forward and backward movement.

10. The lancing device of claim 1-9, wherein: Both the lance and the throttling device have two in parallel arrangement.

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