Needle and medicine combined pestle needle device

Abstract

The utility model discloses a needle and medicine combined pestle needle device which comprises a pestle body and a needle body, the top of the pestle body is detachably connected with the bottom of the needle body, a medicine discharging bin is arranged in the pestle body, medicine liquid is stored in the medicine discharging bin, an upper medicine bin is arranged in the needle body, the upper medicine bin and the lower medicine bin are communicated through a suction pipe, and the top of the suction pipe is connected with the input end of a hand pump. The output end of the hand pump is communicated with the inside of the medicine feeding bin, the top of the medicine feeding bin is communicated with the bottoms of the needles, the needles are hollow, compression springs are fixedly arranged in the needles, balls are arranged between the tops of the compression springs and liquid outlets in the tops of the needles, and the diameter of the balls is larger than that of the liquid outlets. The pestle needle effectively solves the technical problem that the friction force between the pestle needle and the skin surface is large during pestle moving, the pestle moving operation difficulty is reduced, and the pestle moving efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pestle needle improvement, in particular to a pestle needle device combining needle and medicine. Background Art

[0002] Pestle needle therapy uses special tools to stimulate the acupoints on the human body through certain techniques to act on the meridians and internal organs, so as to harmonize yin and yang, strengthen the body's health and eliminate evil, promote qi and blood circulation, so as to achieve the purpose of preventing and curing diseases. Pestle needle therapy combines the advantages of acupuncture and massage, but the needle does not pierce the skin, so there is no pain or injury, and no worry about cross infection.

[0003] Currently, conventional pestle needles, such as the Seven-Star Hunyuan Pestle, have an integrated solid structure. When the pestle is used, the surface of the needle head will directly rub against the skin, which often causes discomfort to the patient and may even cause a risk of bruise when the friction is large. Moreover, when the friction is large, it becomes more difficult for the doctor to operate the pestle, and the pestle operation is less efficient. To address this phenomenon, the conventional method is to apply liquid medicine on the patient's skin surface in advance, so that when the pestle needle is used, there is less friction and the patient feels comfortable. However, this method requires the doctor to prepare the liquid medicine in advance, which makes the operation cumbersome, and sometimes the amount of liquid medicine applied is difficult to control. If the amount is too large, the liquid will spill and pollute the surrounding operating environment.

[0004] In addition, corresponding patents are also disclosed to solve the above problems, such as CN206792651U-a new type of pestle needle, which sets the needle body of the pestle needle as a hollow plug-in torsion switch structure, and the built-in vibration motor is powered by a lithium battery. When in use, only the needle body needs to be rotated to control the switch of the vibration motor, which is simple and convenient to operate; the vibration of the pestle needle is equivalent to pressing on the treatment part to make continuous and rhythmic vibrations, so that the treatment part vibrates with a small amplitude and a fast speed, which improves the treatment effect and reduces the difficulty of operation for the operator; however, the production cost of the pestle needle is relatively high, and a matching vibration motor and lithium battery are required, and the friction problem between the pestle needle and the skin surface is not fundamentally solved. Summary of the invention

[0005] The purpose of the utility model is to overcome the above-mentioned shortcomings and provide a needle-and-medicine combined pestle-needle device, which can solve the technical problem of large friction between the pestle needle and the skin surface during pestle operation, reduce the difficulty of pestle operation, and improve pestle operation efficiency.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is: a needle-and-medicine combined pestle device, comprising a pestle body and a needle body, the top of the pestle body and the bottom of the needle body being detachably connected, a lower medicine bin being provided inside the pestle body, and liquid medicine being stored in the lower medicine bin, an upper medicine bin being provided inside the needle body, a suction tube being provided between the upper medicine bin and the lower medicine bin, the top of the suction tube being connected to the input end of a hand pump, the output end of the hand pump being communicated with the interior of the upper medicine bin, the top of the upper medicine bin being communicated with the bottom of a plurality of needles, the interior of the needles being hollow, and a compression spring being fixedly provided therein, a ball being provided between the top of the compression spring and the liquid outlet at the top of the needle, and the diameter of the ball being larger than the caliber of the liquid outlet.

[0007] Preferably, the top of the pestle body is threadedly connected to the bottom of the needle body.

[0008] Preferably, the lower medicine chamber is an inner cavity structure with an open top, and the upper medicine chamber is a closed inner cavity structure, a through hole for inserting a suction tube is opened at the bottom, and a sealing ring is provided at the position of the through hole.

[0009] Preferably, the side wall surface of the pestle body is provided with a one-way valve or a waterproof breathable valve connected to the lower medicine bin, and the side wall surface of the needle body is provided with a waterproof breathable valve connected to the upper medicine bin.

[0010] Preferably, the hand pump includes a limiting cylinder fixed in the medicine supply bin, an annular piston slidably matched with the limiting cylinder is provided in the limiting cylinder, the bottom of the annular piston is connected to the limiting cylinder through a spring, the top of the annular piston is connected to the bottom of the connecting pipe, the top of the connecting pipe is fixedly connected to the bottom of the pressing rod, a liquid outlet pipe is provided on the side of the connecting pipe, the liquid outlet pipe passes through a long groove opened on the side wall of the limiting cylinder and extends into the interior of the medicine supply bin, and a one-way non-return mechanism that only allows liquid to flow upward is provided at the bottom of the limiting cylinder and the inside of the connecting pipe.

[0011] Preferably, the one-way non-return mechanism at the bottom of the limiting cylinder comprises a first small ball, a limiting mesh cover fixed to the inner wall of the limiting cylinder is provided above the first small ball, and the bottom of the limiting cylinder below the first small ball is a conical structure.

[0012] Preferably, the one-way non-return mechanism inside the connecting tube includes a second small ball, the bottom of the second small ball is in contact with the limiting ring, the interior of the limiting ring is a truncated cone that is wide at the top and narrow at the bottom, and a limiting rod is provided above the second small ball, and the top of the limiting rod is fixedly connected to the bottom center of the pressing rod.

[0013] Preferably, the one-way check mechanism at the bottom of the limiting cylinder includes a first one-way valve arranged at the top of the suction tube.

[0014] Preferably, the one-way check mechanism inside the connecting pipe includes a second one-way valve arranged in the connecting pipe.

[0015] Preferably, a sealing piston is also sleeved and fixed on the surface of the pressing rod, and the sealing piston is slidably matched with the inside of the limiting cylinder.

[0016] Beneficial effects of the utility model:

[0017] 1. The utility model can drive the medicine liquid to flow out while the ball rolls through the cooperation process of the ball and the compression spring, which can greatly reduce the friction between the needle and the skin surface. The medicine liquid itself has a lubricating effect, which can further reduce the friction. It effectively solves the technical problem of large friction between the pestle needle and the skin surface during pestle operation, reduces the difficulty of pestle operation, and improves pestle operation efficiency.

[0018] 2. The utility model adopts the compartment design of the upper medicine compartment and the lower medicine compartment, and is combined with an improved hand pressure pump to perform small and multiple liquid suction operations, which not only avoids the waste of excess liquid medicine and saves the amount of liquid medicine, but also makes the switching process efficient and easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the exploded structure of a needle-and-pharmaceutical combined pestle device;

[0020] Figure 2 for Figure 1 A schematic diagram of the enlarged structure of the middle needle body;

[0021] Figure 3 for Figure 2 An enlarged structural diagram of the area where the hand pressure pump is located;

[0022] Figure 4 It is a schematic diagram of the structure of the entire pestle-needle device after a portion of the liquid in the lower medicine chamber is sucked into the upper medicine chamber by a pressing pump before the pestle is used;

[0023] Figure 5 for Figure 4 Schematic diagram of the structure of the entire pestle-needle device when it is inverted and pestling is performed. DETAILED DESCRIPTION

[0024] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0025] like Figure 1-5As shown, a needle-and-pharmaceutical combined pestle device comprises a pestle body 1 and a needle body 2, wherein the top of the pestle body 1 and the bottom of the needle body 2 are detachably connected, a lower medicine chamber 3 is provided inside the pestle body 1, and liquid medicine is stored in the lower medicine chamber 3, an upper medicine chamber 4 is provided inside the needle body 2, a suction tube 5 is provided between the upper medicine chamber 4 and the lower medicine chamber 3, the top of the suction tube 5 is connected to the input end of a hand pump 6, and the output end of the hand pump 6 is communicated with the interior of the upper medicine chamber 4, the top of the upper medicine chamber 4 is communicated with the bottom of a plurality of needles 7, the interior of the needle 7 is hollow, and a compression spring 8 is fixedly provided therein, a ball 9 is provided between the top of the compression spring 8 and the liquid outlet 7.1 at the top of the needle 7, and the diameter of the ball 9 is larger than the caliber of the liquid outlet 7.1.

[0026] As one of the preferred embodiments, the top of the pestle body 1 is threadedly connected to the bottom of the needle body 2. Through this threaded connection, the pestle body 1 can be detachably connected to the needle body 2. For example, when it is necessary to replenish the liquid medicine in the lower medicine chamber 3, the needle body 2 can be unscrewed, and then the liquid medicine in the lower medicine chamber 3 can be replenished, and then the needle body 2 can be reinstalled, which is simple and convenient to operate.

[0027] As one preferred embodiment, the lower medicine bin 3 is an inner cavity structure with an open top, and the upper medicine bin 4 is a closed inner cavity structure, with a through hole for inserting the suction tube 5 at the bottom, and a sealing ring is provided at the position of the through hole. By providing the sealing ring, the drug liquid can be prevented from flowing along the gap between the suction tube 5 and the bottom of the upper medicine bin 4.

[0028] As one of the preferred embodiments, the side wall surface of the pestle body 1 is provided with a one-way valve or a waterproof breathable valve connected to the lower medicine bin 3, and the side wall surface of the needle body 2 is provided with a waterproof breathable valve connected to the upper medicine bin 4. Since when the hand pressure pump 6 is operated, the suction tube 5 generates a negative pressure to absorb the liquid medicine in the lower medicine bin 3 into the upper medicine bin 4, in order to smoothly and sustainably carry out this process, it is necessary to keep the air pressure inside the lower medicine bin 3 balanced with that of the outside world, so a one-way valve or a waterproof breathable valve is installed to solve this problem; when the one-way valve is used, the outside air can only enter the lower medicine bin 3 in one direction, and the liquid inside the lower medicine bin 3 cannot flow out to the outside world; the waterproof breathable valve currently on the market has air pressure balance and waterproof performance. When the waterproof breathable valve is used, the waterproof breathable valve allows gas to enter and exit freely, but liquid cannot pass through, thereby playing a waterproof and breathable role, ensuring that the air pressure inside the lower medicine bin 3 is balanced with that of the outside world, and preventing the liquid medicine from flowing out of the valve.

[0029] Similarly, when negative pressure is generated in the suction tube 5 and the medicine liquid in the lower medicine chamber 3 is sucked into the upper medicine chamber 4, the pressure in the upper medicine chamber 4 may increase, and the medicine liquid in the upper medicine chamber 4 also needs to flow out smoothly from the needle head 7 when pestling. Therefore, a waterproof and breathable valve connected to the upper medicine chamber 4 can also be provided on the side wall surface of the needle body 2 to ensure air pressure balance and prevent the medicine liquid from flowing out of the valve.

[0030] As one of the preferred implementation modes, Figure 3 As shown, the hand pump 6 includes a limiting cylinder 6.1 fixedly arranged in the upper medicine bin 4, an annular piston 6.2 slidably matched therewith is arranged in the limiting cylinder 6.1, the bottom of the annular piston 6.2 is connected to the limiting cylinder 6.1 through a spring 6.3, the top of the annular piston 6.2 is communicated with the bottom of a connecting pipe 6.5, the top of the connecting pipe 6.5 is fixedly connected to the bottom of a pressing rod 6.6, a liquid outlet pipe 6.7 is arranged on the side of the connecting pipe 6.5, the liquid outlet pipe 6.7 passes through a long groove 6.8 provided on the side wall of the limiting cylinder 6.1 and extends into the upper medicine bin 4, and a one-way non-return mechanism that only allows liquid to flow upward is arranged at the bottom of the limiting cylinder 6.1 and inside the connecting pipe 6.5. In this embodiment, the structure of the hand pump 6 is substantially the same as the hand pump (e.g., hand pump for hand sanitizer) or the pressing pump structure principle on the market, such as the pressing liquid suction mechanism involved in CN110179379A-a hand sanitizer storage device with liquid outflow from the top. This embodiment is improved on the basis of the existing hand pump, and its working principle is as follows:

[0031] Step 1: When pressing the pressing rod 6.6 by hand, the pressing rod 6.6 drives the connecting tube 6.5 and the annular piston 6.2 to move downward together, so that the annular piston 6.2 squeezes the spring 6.3 and reduces the volume of the cavity below the annular piston 6.2; Step 2: When releasing the hand, under the action of the elastic force of the spring 6.3, the annular piston 6.2 moves upward, so that the volume of the cavity below the annular piston 6.2 increases, generating negative pressure, so that the liquid medicine in the lower medicine chamber 3 is sucked into the cavity below the annular piston 6.2 through the suction tube 5; Step 3: When pressing the pressing rod 6.6 again, the pressing rod 6.6 The connecting pipe 6.5 and the annular piston 6.2 are driven to move downward together, so that the annular piston 6.2 squeezes the spring 6.3 and reduces the volume of the cavity below the annular piston 6.2. At this time, the liquid medicine in the cavity below the annular piston 6.2 is squeezed and enters the upper connecting pipe 6.5 along the inside of the annular piston 6.2, and then is discharged through the liquid outlet pipe 6.7 and enters the upper medicine chamber 4; then the above steps 2 and 3 are repeated in sequence to realize the continuous liquid discharge process; in the above process, the one-way check mechanism can ensure that the liquid can flow in a directional manner, and the one-way check mechanism can adopt the following two implementations:

[0032] Example 1: Figure 3As shown, the one-way non-return mechanism at the bottom of the limiting cylinder 6.1 comprises a first small ball 6.1.1, a limiting mesh cover 6.1.2 fixed to the inner wall of the limiting cylinder 6.1 is arranged above the first small ball 6.1.1, and the bottom of the limiting cylinder 6.1 below the first small ball 6.1.1 is a conical structure.

[0033] The one-way check mechanism inside the connecting tube 6.5 includes a second small ball 6.5.1, the bottom of which is in contact with a limiting ring 6.5.2, the inside of which is a truncated cone that is wide at the top and narrow at the bottom, and a limiting rod 6.5.3 is provided above the second small ball 6.5.1, the top of which is fixedly connected to the bottom center of the pressing rod 6.6.

[0034] This embodiment adopts a spherical structure. When the annular piston 6.2 moves downward, positive pressure is generated, and the first small ball 6.1.1 blocks the bottom of the limiting cylinder 6.1, thereby ensuring that the liquid can be smoothly squeezed and enter the upper connecting pipe 6.5 along the inside of the annular piston 6.2. The second small ball 6.5.1 leaves the limiting ring 6.5.2, and the liquid passes through this position smoothly, and then is discharged through the liquid outlet pipe 6.7 and enters the upper medicine chamber 4; when the annular piston 6.2 moves upward, negative pressure is generated, and the first small ball 6.1.1 leaves the bottom of the limiting cylinder 6.1, so that the liquid in the lower medicine chamber 3 can be sucked into the cavity below the annular piston 6.2 through the suction tube 5.

[0035] Embodiment 2: The one-way non-return mechanism at the bottom of the limiting cylinder 6.1 includes a first one-way valve arranged at the top of the suction pipe 5.

[0036] The one-way check mechanism inside the connecting pipe 6.5 includes a second one-way valve arranged inside the connecting pipe 6.5.

[0037] The one-way valve structure adopted in this embodiment is more convenient and can be directly installed on the corresponding pipeline to ensure that the liquid can only flow in one direction upward.

[0038] As one of the preferred embodiments, a sealing piston 6.4 is also fixedly mounted on the surface of the pressing rod 6.6, and the sealing piston 6.4 is slidably matched with the inside of the limiting cylinder 6.1. During use, when the entire pestle needle device is turned upside down, in order to prevent the liquid medicine inside the upper medicine bin 4 from flowing out from the gap between the pressing rod 6.6 and the limiting cylinder 6.1, a corresponding sealing piston 6.4 is provided, so that the liquid will be blocked by the sealing piston 6.4 and will not leak out.

[0039] In addition, the medicinal liquid in this embodiment can be selected from medicinal liquid for treating neck, shoulder, waist and leg pain, or medicinal liquid or essential oil for promoting blood circulation and removing blood stasis.

[0040] In this embodiment, the diameter of the ball 9 is larger than the liquid outlet 7.1 at the top of the needle 7, which can prevent the ball 9 from directly passing through the liquid outlet 7.1 and falling off.

[0041] Preferably, the number of the multiple needles 7 on the top of the upper medicine chamber 4 can be set as needed, for example, set to a number of seven similar to the Seven-Star Hunyuan Pestle, or set to the number of other types of pestle needles.

[0042] Preferably, if Figure 4 and 5 As shown, the bottom of the suction tube 5 is close to the bottom of the lower medicine bin 3, so when the entire device is turned upside down, the liquid level in the lower medicine bin 3 will be lower than the end of the suction tube 5, so the liquid will not enter the upper medicine bin 4 from the lower medicine bin 3.

[0043] The working principle of the utility model is as follows:

[0044] In the pestle preparation stage, after the pestle body 1 and the needle body 2 are disinfected, the lower medicine chamber 3 inside the pestle body 1 is first filled with liquid medicine, and then the needle body 2 is installed on the pestle body 1. At this time, the doctor only needs to carry the entire pestle-needle device to the ward, which is convenient to carry. When the patient is being pestled, the entire pestle-needle device is first placed upright on the table, and the hand pump 6 is pressed downward several times at this time, so that part of the liquid medicine in the lower medicine chamber 3 enters the upper medicine chamber 4 (such as Figure 4 ), and then invert the entire pestle-needle assembly (as Figure 5 As shown in the figure, the pestle process begins. When the head of the needle body 2 contacts the patient's skin, the ball 9 is compressed and exerts pressure on the compression spring 8. The ball 9 retracts into the needle head 7, thereby exposing a certain gap, so that the liquid medicine in the upper medicine chamber 4 passes through the needle head 7 under the action of gravity and slowly flows out from its liquid outlet 7.1 to the surface of the patient's skin. When the entire pestle needle device is pushed, due to the rolling characteristics of the ball 9, the friction between the needle head 7 and the skin surface can be reduced. At the same time, the liquid medicine can be driven to flow out while rolling. This is similar to the principle of ink flowing out of a ballpoint pen. In addition, the liquid medicine itself has a lubricating effect, which can further reduce the friction.

[0045] Each time of pestling is about half an hour. The volume of the lower medicine chamber 3 of the pestle needle device is larger than that of the upper medicine chamber 4. After the liquid medicine in the upper medicine chamber 4 is used up, the pestle needle device can be placed upright, and a small amount of liquid medicine can be sucked into the upper medicine chamber 4 by pressing the hand pressure pump 6, and then the pestle needle device can be turned upside down to continue pestling. The above-mentioned liquid medicine absorption (or use) process can be carried out in small quantities and multiple times, so as not to waste liquid medicine. After the pestle is completed for a patient, since the liquid medicine in the upper medicine chamber 4 will not flow back into the lower medicine chamber 3, there is no situation of contaminating the liquid medicine in the lower medicine chamber 3, so it can be used for the next patient. At this time, it is only necessary to replace the new sterilized needle body 2, or since the pestle process is mainly performed on the patient's skin surface, the disinfection requirement is not as high as that of other surgical instruments (for example, the probe used for conventional B-ultrasound also directly contacts the patient's skin and is directly disinfected with alcohol and reused), the needle body 2 can also be disinfected with alcohol before being put into use on the next patient; in this way, the above process not only saves the amount of liquid medicine, but also has efficient switching process and convenient operation. In addition, the reason why the utility model is designed with the above-mentioned compartment and the structure of the additional hand pump 6 is as follows: if the above-mentioned pounding process is carried out in one compartment directly and the hand pump 6 is not provided, the liquid medicine will often not be used up. In this way, if contaminants enter from the liquid outlet 7.1, the liquid in the entire compartment will be contaminated and have to be poured out, thus causing waste. The design of the utility model can solve this problem well.

[0046] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limitations of the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A needle-and-pharmaceutical combination pestle device, comprising a pestle body (1) and a needle body (2), characterized in that: The top of the pestle body (1) and the bottom of the needle body (2) are detachably connected. A lower medicine chamber (3) is provided inside the pestle body (1), and liquid medicine is stored in the lower medicine chamber (3). An upper medicine chamber (4) is provided inside the needle body (2). A suction tube (5) is provided between the upper medicine chamber (4) and the lower medicine chamber (3). The top of the suction tube (5) is connected to the input end of a hand pump (6), and the output end of the hand pump (6) is connected to the interior of the upper medicine chamber (4). The top of the upper medicine chamber (4) is connected to the bottom of a plurality of needles (7). The interior of the needle (7) is hollow, and a compression spring (8) is fixedly provided therein. A ball (9) is provided between the top of the compression spring (8) and the liquid outlet (7.1) at the top of the needle (7), and the diameter of the ball (9) is larger than the caliber of the liquid outlet (7.1).

2. The needle-and-drug combination pestle device according to claim 1, characterized in that: The top of the pestle body (1) is threadably connected to the bottom of the needle body (2).

3. The needle-and-drug combination pestle device according to claim 1, characterized in that: The lower medicine bin (3) is an inner cavity structure with an open top, and the upper medicine bin (4) is a closed inner cavity structure, with a through hole for inserting a suction tube (5) at the bottom, and a sealing ring is provided at the position of the through hole.

4. The needle-and-drug combination pestle device according to claim 1, characterized in that: A one-way valve or a waterproof breathable valve communicating with the lower medicine bin (3) is provided on the side wall surface of the pestle body (1), and a waterproof breathable valve communicating with the upper medicine bin (4) is provided on the side wall surface of the needle body (2).

5. The needle-and-drug combination pestle device according to claim 1, characterized in that: The hand pump (6) comprises a limiting cylinder (6.1) fixedly arranged in the medicine upper bin (4), an annular piston (6.2) slidably matched therewith is arranged in the limiting cylinder (6.1), the bottom of the annular piston (6.2) is connected to the limiting cylinder (6.1) via a spring (6.3), the top of the annular piston (6.2) is connected to the bottom of a connecting pipe (6.5), the top of the connecting pipe (6.5) is fixedly connected to the bottom of a pressing rod (6.6), a liquid outlet pipe (6.7) is arranged on the side of the connecting pipe (6.5), the liquid outlet pipe (6.7) passes through a long groove (6.8) provided on the side wall of the limiting cylinder (6.1) and extends into the interior of the medicine upper bin (4), and a one-way non-return mechanism that only allows liquid to flow upwards is arranged at the bottom of the limiting cylinder (6.1) and inside the connecting pipe (6.5).

6. The needle-and-drug combination pestle device according to claim 5, characterized in that: The one-way non-return mechanism at the bottom of the limiting cylinder (6.1) comprises a first small ball (6.1.1), a limiting mesh cover (6.1.2) fixed to the inner wall of the limiting cylinder (6.1) is provided above the first small ball (6.1.1), and the first small ball (6.1.2) The bottom of the limiting cylinder (6.1) below is a conical structure.

7. The needle-and-drug combination pestle device according to claim 6, characterized in that: The one-way non-return mechanism inside the connecting tube (6.5) comprises a second small ball (6.5.1), the bottom of the second small ball (6.5.1) contacts the limiting ring (6.5.2), the inside of the limiting ring (6.5.2) is a truncated cone shape that is wide at the top and narrow at the bottom, a limiting rod (6.5.3) is provided above the second small ball (6.5.1), and the top of the limiting rod (6.5.3) is fixedly connected to the bottom center of the pressing rod (6.6).

8. The needle-and-drug combination pestle device according to claim 5, characterized in that: The one-way check mechanism at the bottom of the limiting cylinder (6.1) comprises a first one-way valve arranged at the top of the suction pipe (5).

9. The needle-and-drug combination pestle device according to claim 8, characterized in that: The one-way check mechanism inside the connecting pipe (6.5) comprises a second one-way valve arranged inside the connecting pipe (6.5).

10. The needle-and-drug combination pestle device according to claim 5, characterized in that: A sealing piston (6.4) is also sleeved and fixed on the surface of the pressing rod (6.6), and the sealing piston (6.4) is slidably matched with the interior of the limiting cylinder (6.1).

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