Formalin transfer device for specimen transfer

Abstract

The invention relates to the field of medical treatment, and discloses a sealed formalin transfer device for specimen preservation, which comprises a bottle opening connecting assembly (1), a bag opening connecting assembly (2) and a connecting pipe (3) connected between the bottle opening connecting assembly (1) and the bag opening connecting assembly (2), the bottle opening connecting assembly (1) comprises a bottle cap (101) used for being connected to a bottle opening of the formalin filling bottle, a liquid suction assembly (102) arranged on the bottle cap (101) and a liquid suction pipe (103) stretching into the formalin filling bottle, and the connecting pipe (3) is communicated with the liquid suction pipe (103) through the liquid suction assembly (102). The bag opening connecting assembly (2) comprises a clamping assembly (201) used for clamping the specimen bag and a liquid outlet pipe (202) capable of extending into the specimen bag from the bag opening of the specimen bag, and the liquid outlet pipe (202) is communicated with the connecting pipe (3). According to the invention, the diffusion of formalin in air can be effectively slowed down, and pungent smell and damage to human health in the transfer process can be effectively reduced.

Description

Technical Field

[0001] The invention relates to the medical field, and in particular to a sealed formalin transfer device for specimen preservation. Background Art

[0002] Generally, after surgery, tissue specimens need to be sent to the laboratory for pathological testing. During the transfer process, the tissue specimens need to be placed in a disposable specimen bag filled with formalin to prevent specimen denaturation.

[0003] However, during the operation, since formalin is usually placed in a large filling bottle, and the disposable specimen bag is usually thin and soft, it is difficult to pour the formalin in the bottle into the specimen bag, which is inconvenient to operate and easy to spill. In addition, formalin is toxic and has a pungent odor. During the process of pouring it into the specimen bag, the odor will continue to spread, which can easily irritate the respiratory mucosa, causing symptoms such as coughing and dizziness, which is not conducive to the health of the operator. Summary of the invention

[0004] Aiming at the problem that it is inconvenient to take formalin when transferring specimens in the prior art, the invention provides a formalin transfer device for transferring specimens.

[0005] In order to solve the above technical problems, the present invention is solved by the following technical solutions: A sealed formalin transfer device for specimen preservation comprises a bottle connection component, a bag connection component and a connection pipe connected between the bottle connection component and the bag connection component; The bottle mouth connecting assembly comprises a bottle cap for connecting to the bottle mouth of the formalin filling bottle, a liquid suction assembly arranged on the bottle cap and a liquid suction tube extending into the formalin filling bottle, and the connecting tube is connected to the liquid suction tube through the liquid suction assembly; The bag opening connection component comprises a clamping component for clamping the specimen bag and a liquid outlet pipe which can extend into the specimen bag from the bag opening of the specimen bag, and the liquid outlet pipe is communicated with the connection pipe.

[0006] Preferably, the bottle cap includes a cover body threadedly connected to the mouth of the formalin filling bottle, a liquid suction cylinder body with an upper end open and capable of extending into the formalin filling bottle from the mouth of the formalin filling bottle is provided in the middle of the cover body, a liquid suction cavity is formed inside the liquid suction cylinder body, a liquid suction tube is connected to the bottom of the liquid suction cavity, and a first one-way valve communicating from the liquid suction tube toward the liquid suction cavity is provided at the connection.

[0007] Preferably, the liquid suction component includes a liquid suction piston whose lower end can move up and down in the liquid suction chamber and whose upper end extends out of the liquid suction chamber, and a piston channel is formed in the middle of the liquid suction piston. The liquid suction component also includes a pressing spring arranged in the liquid suction chamber and whose upper end is against the liquid suction piston; a pressing piece for pressing the liquid suction piston is provided at the upper end of the liquid suction piston, and a pressing piece channel is provided in the pressing piece, whose two ends are respectively connected to the connecting pipe and the piston channel, and a second one-way valve is provided between the pressing piece channel and the piston channel, which communicates from the piston channel toward the pressing piece channel.

[0008] The arrangement of the liquid suction component and the bottle cap can ensure that the filling bottle does not need to be opened during filling, effectively preventing the smell of formalin from escaping. The arrangement of the first one-way valve and the second one-way valve can both ensure liquid reflux when formalin is sucked.

[0009] Preferably, the clamping assembly includes two clamping plates that can move toward or away from each other and a clamping plate driving assembly for driving the clamping plates to move, the clamping plate driving assembly includes a driving assembly housing, a screw is provided in the driving assembly housing, a clamping plate connecting member is threadedly connected to the screw, the clamping plate connecting member is arranged at one end of the clamping plate, and a screw knob is provided on the outside of the driving assembly housing, which is coaxially connected to the screw and is used to drive the screw to rotate.

[0010] Preferably, the clamping plate includes a first plate body, a second plate body and a semicircular ring disposed between the first plate body and the second plate body, the clamping plate connecting piece is disposed at the end of the first plate body away from the semicircular ring, and the semicircular rings on the two clamping plates can together form a circular clearance hole for the liquid outlet tube to pass through. The formation of the circular clearance hole can enable the clamping plate to clamp both sides of the bag opening of the specimen bag, and then can reduce the opening of the specimen bag as much as possible when filling it.

[0011] Preferably, the bag opening connection assembly further comprises a base, on which a liquid collection box and a measuring cylinder arranged on the liquid collection box are arranged, and the liquid outlet pipe is connected to the bottom of the liquid collection box; The upper end plate of the liquid collection box is provided with a collection box liquid inlet, the upper end of the measuring cylinder is connected to the connecting pipe, and the lower end is connected to the collection box liquid inlet, and the liquid collection box is provided with a first blocking mechanism for blocking the collection box liquid inlet. The setting of the first blocking mechanism can effectively ensure that the measuring cylinder weighs formalin and realizes accurate filling of the specimen bag according to the required amount.

[0012] Preferably, the first blocking mechanism comprises a blocking plate disposed in the liquid collection box, one end of the blocking plate can be rotated to the lower end of the liquid inlet of the collection box to block the liquid inlet of the collection box, and the other end is connected to a blocking plate knob located outside the liquid collection box and used to rotate the blocking plate. The operation of the blocking plate is simple and convenient.

[0013] Preferably, the plugging plate knob is connected to the plugging plate through a connecting rod extending from the liquid collection box, the liquid collection box is provided with a connecting rod mounting port, a sealing rubber ring is provided between the connecting rod and the connecting rod mounting port, a plugging spring for driving the plugging plate to move toward the lower end of the liquid inlet of the collection box is sleeved on the connecting rod, and a rubber pad is provided on the upper surface of the plugging plate. The provision of the plugging spring and the rubber pad can effectively ensure the plugging effect of the plugging plate.

[0014] Preferably, the lower end of the liquid collection box is constructed as a conical shell with a gradually decreasing cross-section, and the lower end of the conical shell is provided with a liquid outlet interface pipe, the liquid outlet interface pipe is threadedly connected with a liquid outlet pipe interface, and the liquid outlet pipe is connected to the liquid outlet pipe interface; the liquid outlet pipe interface is provided with a second blocking mechanism for blocking the liquid outlet pipe, and the second blocking mechanism includes a blocking valve core provided on the inner wall of the liquid outlet pipe interface, the blocking valve core includes an annular connecting portion and a hemispherical protrusion provided in the middle of the annular connecting portion, and a plurality of liquid holes are evenly provided on the annular connecting portion, and the hemispherical protrusion can extend from the bottom to the top into the liquid outlet interface pipe under the action of the liquid outlet pipe interface and block the liquid outlet interface pipe. The provision of the second blocking mechanism can effectively prevent the residual liquid in the liquid collection box from flowing out.

[0015] Preferably, the liquid collecting box further comprises a guide rod connected to the bottom of the liquid collecting box, a limit plate is sleeved on the guide rod, and the end of the limit plate away from the guide rod is rotatably connected to the outer wall of the liquid outlet interface. The setting of the limit plate can prevent the liquid outlet interface from excessively moving on the liquid outlet interface tube.

[0016] The present invention has significant technical effects due to the adoption of the above technical solution: The present invention can realize the transfer of formalin from the formalin filling bottle to the specimen bag without opening the formalin filling bottle, can effectively slow down or even prevent the formalin from being emitted into the air, and further reduce the pungent odor and damage to human health during the transfer process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the present invention.

[0018] Figure 2 It is a schematic diagram of the use status of the present invention.

[0019] Figure 3 yes Figure 1 Schematic diagram of the structure of the middle bottle mouth connection assembly.

[0020] Figure 4 yes Figure 1 Schematic diagram of the structure of the middle bag opening connection component.

[0021] Figure 5 yes Figure 4 sectional view of .

[0022] Figure 6 yes Figure 5 Schematic diagram of the structure of the first blocking mechanism.

[0023] Figure 7 yes Figure 5 Schematic diagram of the structure of the second blocking mechanism.

[0024] Figure 8 yes Figure 5 Schematic diagram of the structure of the clamping assembly. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0026] Example 1 Formalin transfer device for sealed specimen storage, such as Figure 1-Figure 8 As shown, it includes a bottle mouth connecting component 1, a bag mouth connecting component 2 and a connecting pipe 3 connected between the bottle mouth connecting component 1 and the bag mouth connecting component 2; The bottle mouth connecting assembly 1 comprises a bottle cap 101 for connecting to the bottle mouth of the formalin filling bottle 4, a liquid suction assembly 102 arranged on the bottle cap 101 and a liquid suction tube 103 extending into the formalin filling bottle 4, and the connecting tube 3 is connected to the liquid suction tube 103 through the liquid suction assembly 102; The bag opening connection assembly 2 comprises a clamping assembly 201 for clamping the specimen bag 5 and a liquid outlet tube 202 capable of extending from the bag opening of the specimen bag 5 into the specimen bag 5 , and the liquid outlet tube 202 is communicated with the connection tube 3 .

[0027] In this embodiment, the cooperation between the bottle mouth connection component 1 and the bag mouth connection component 2 can realize the transfer of formalin from the bottle to the specimen bag 5 without opening the formalin filling bottle 4, which can effectively slow down, or even prevent the formalin from being emitted into the air, and slow down the pungent odor and damage to human health during the transfer process; through the cooperation of the pipette 103, the connecting tube 3 and the liquid outlet tube 202, it can be realized that formalin is directly extracted from the bottle into the bag during transfer, and the accidental spillage caused by the mismatch between the entrances and exits of the two can be effectively avoided. At the same time, the clamping component 201 is set to clamp the specimen bag 5, which can better fix the thin and soft specimen bag 5. During the formalin transfer operation, there is no need for the operator to take the specimen bag 5 by hand, which can not only avoid the spillage of formalin caused by accidental shaking of the human hand, but also prevent the formalin from falling on the human hand and causing harm to the person when it is accidentally spilled.

[0028] In this embodiment, the bottle cap 101 includes a cover body 104 which is threadedly connected to the bottle mouth of the formalin filling bottle 4. A liquid suction cylinder 105 which can extend from the bottle mouth of the formalin filling bottle 4 into the formalin filling bottle 4 and has an open upper end is provided in the middle of the cover body 104. A liquid suction cavity 106 is formed inside the liquid suction cylinder 105. A sealing plug 114 is provided at the upper end of the liquid suction cavity 106. The liquid suction tube 103 is connected to the bottom of the liquid suction cavity 106 and a first one-way valve 107 which communicates from the liquid suction tube 103 toward the liquid suction cavity 106 is provided at the connection.

[0029] The liquid suction component 102 includes a liquid suction piston 108 whose lower end can move up and down in the liquid suction chamber 106 and whose upper end extends out of the liquid suction chamber 106 through a sealing plug 114, and a piston channel 109 is formed in the middle of the liquid suction piston 108. The liquid suction component 102 also includes a pressing spring 110 arranged in the liquid suction chamber 106 and whose upper end is against the liquid suction piston 108; a pressing piece 111 for pressing the liquid suction piston 108 is provided at the upper end of the liquid suction piston 108, and a pressing piece channel 112 is provided in the pressing piece 111, whose two ends are respectively connected to the connecting pipe 3 and the piston channel 109, and a second one-way valve 113 is provided between the pressing piece channel 112 and the piston channel 109, which is connected from the piston channel 109 to the pressing piece channel 112.

[0030] The thread at the bottle cap 101 is a thread matching the thread at the mouth of a conventional formalin canned bottle, and can directly replace the original bottle cap 101 of the canned bottle. Compared with the conventional bottle cap 101, the bottle cap 101 does not need to be opened when taking formalin. Instead, the pressing member 111 needs to be directly pressed, and the liquid aspiration piston 108 needs to be driven downward by the pressing member 111. Then, the pressing member 111 is released, and the piston is reset under the action of the spring. At this time, the formalin in the bottle can be sucked to the pressing member channel 112 through the liquid pipette 103 under the action of negative pressure, and then enters the bag port connection assembly 2 through the connecting pipe 3, and finally enters the specimen bag 5 through the liquid outlet pipe 202.

[0031] When in use, a small opening can be made in the middle of the specimen bag 5 so that it can be put on the liquid outlet tube 202, and then the two sides of the specimen bag 5 can be clamped by the clamping component 201 to ensure that the specimen bag 5 is always put on the liquid outlet tube 202, effectively preventing formalin from leaking when entering the specimen bag 5.

[0032] During the whole filling process, the formalin filling bottle 4 is not in an open state, and the odor will not be emitted in large quantities. The process of entering the specimen bag 5 can also ensure that the position of the specimen bag 5 is fixed, and basically no accidental spillage will occur, and the operation is more convenient.

[0033] In this embodiment, the clamping assembly 201 includes two clamping plates 203 that can move toward or away from each other and a clamping plate driving assembly for driving the clamping plates 203 to move. The clamping plate driving assembly includes a driving assembly housing 204. A screw 205 is provided in the driving assembly housing 204. A clamping plate connecting member 206 is threadedly connected to the screw 205. The clamping plate connecting member 206 is arranged at one end of the clamping plate 203. A screw knob 207 coaxially connected to the screw 205 and used to drive the screw 205 to rotate is arranged on the outside of the driving assembly housing 204.

[0034] Among them, the clamping plate 203 includes a first plate body 208, a second plate body 209 and a semicircular ring 210 arranged between the first plate body 208 and the second plate body 209. The clamping plate 203 connecting piece is arranged at the end of the first plate body 208 away from the semicircular ring 210. The semicircular rings 210 on the two clamping plates 203 can jointly form a circular clearance hole 211 for the liquid outlet pipe 202 to pass through.

[0035] The structural form of the splint in this embodiment can achieve clamping of both sides of the bag opening of the specimen bag 5. Conventional specimen bags 5 are transparent bags with built-in snap-on seals. When filling, only a small opening needs to be opened in the middle of the bag opening, and the liquid outlet tube 202 extends into the specimen bag 5 from the small opening. The first plate body 208 and the second plate body 209 are respectively clamped at the bag opening and located on both sides of the small opening, which can effectively reduce the size of the bag opening during filling, and further reduce the dispersion of formalin when entering the specimen bag 5.

[0036] In order to further enhance the use effect of the device, the bag port connection assembly 2 further includes a base 212, on which a liquid collection box 213 and a measuring cylinder 214 disposed on the liquid collection box 213 are disposed, and the liquid outlet pipe 202 is connected to the bottom of the liquid collection box 213; The upper end plate of the liquid collection box 213 is provided with a collection box liquid inlet 215, the upper end of the measuring cylinder 214 is connected to the connecting pipe 3, and the lower end is communicated with the collection box liquid inlet 215, and the liquid collection box 213 is provided with a first blocking mechanism for blocking the collection box liquid inlet 215. The arrangement of the measuring cylinder 214 and the first blocking mechanism can achieve better control of the amount of formalin filled into the specimen bag 5, so that the amount of formalin entering the specimen bag 5 is as accurate as possible to the required amount.

[0037] Among them, the first sealing mechanism includes a sealing plate 216 arranged in the liquid collection box 213, one end of the sealing plate 216 can be rotated to the lower end of the collection box liquid inlet 215 to block the collection box liquid inlet 215, and the other end is connected to a sealing plate knob 217 located outside the liquid collection box 213 and used to rotate the sealing plate 216.

[0038] The sealing plate knob 217 is connected to the sealing plate 216 through a connecting rod 218 extending out of the liquid collection box 213. The liquid collection box 213 is provided with a connecting rod mounting port 231. A sealing rubber ring 219 is provided between the connecting rod 218 and the connecting rod mounting port 231. The connecting rod 218 is also provided with a sealing spring 220 for driving the sealing plate 216 to move toward the lower end of the liquid inlet 215 of the collection box. A rubber pad 221 is provided on the upper end surface of the sealing plate 216.

[0039] During the blocking process, the blocking plate 216 is pressed against the lower end surface of the collection box liquid inlet 215 under the action of the blocking spring 220, and the provision of the rubber pad 221 can further strengthen the sealing effect of the blocking plate 216 on the collection box liquid inlet 215; when the blockage needs to be released, it is only necessary to rotate the blocking plate knob 217 so that the end of the blocking plate 216 deviates from the collection box liquid inlet 215, and the collection box liquid inlet 215 can be opened. Of course, the blocking plate 216 does not need to completely fall off the collection box during the deviation process. The liquid inlet 215 only needs to be opened by dislocating the collecting box liquid inlet 215 to ensure the smooth progress of the next blocking process. In order to ensure that the blocking plate 216 does not completely separate from the collecting box liquid inlet 215, a blocking plate 216 rotation mark line is provided on the upper end surface of the liquid collecting box 213. At the same time, in order to prevent the blocking plate 216 from rotating excessively, a blocking plate 216 block is also provided on the rear side of the collecting box liquid inlet 215. When the blocking plate 216 rotates to contact with the blocking plate 216 block, it indicates that it is in a blocking state.

[0040] During the operation, the formalin in the canned bottle is repeatedly extracted into the measuring cylinder 214 through the liquid pipetting component 102. The measuring cylinder 214 is made of transparent material and has scale lines on its outer surface. When the formalin in the measuring cylinder 214 reaches the required scale, the sealing plate knob 217 can be rotated to open the sealing plate 216, so that the formalin flows into the liquid collection box 213 and further flows into the specimen bag 5 through the liquid outlet.

[0041] In this embodiment, the lower end of the liquid collection box 213 is constructed as a conical shell 222 with a gradually decreasing cross-section. The lower end of the conical shell 222 is provided with a liquid outlet interface pipe 223, and the liquid outlet interface pipe 223 is threadedly connected with a liquid outlet pipe interface 224, and the liquid outlet pipe 202 is connected to the liquid outlet pipe interface 224; a second blocking mechanism for blocking the liquid outlet pipe 202 is provided at the liquid outlet pipe interface 224, and the second blocking mechanism includes a blocking valve core 225 arranged on the inner wall of the liquid outlet pipe interface 224, and the blocking valve core 225 includes an annular connecting portion 226 and a hemispherical protrusion 227 arranged in the middle of the annular connecting portion 226, and a plurality of liquid holes 228 are evenly arranged on the annular connecting portion 226. The hemispherical protrusion 227 can extend from bottom to top into the liquid outlet interface pipe 223 under the action of the liquid outlet pipe interface 224 and block the liquid outlet interface pipe 223; Since the liquid collection box 213 has a cavity inside, the formalin remaining on the wall inside may drip out from the liquid outlet tube 202 after being left still for a long time. Therefore, a second blocking mechanism is set between the liquid collection box 213 and the liquid outlet tube 202. After the formalin is filled into the specimen bag 5, the liquid outlet tube interface 224 is rotated to move upward relative to the liquid outlet interface tube 223. At this time, the blocking valve core 225 inside it moves toward the inside of the liquid outlet interface tube 223, and the hemispherical protrusion 227 of the blocking valve core 225 is blocked. The maximum outer diameter is larger than the inner diameter of the liquid outlet interface tube 223, so that the liquid outlet interface tube 223 can be sealed, and the residual liquid in the liquid collection box 213 can be prevented from dripping out; when the specimen bag 5 needs to be filled, it is only necessary to move the liquid outlet tube interface 224 downward relative to the liquid outlet interface tube 223 so that the hemispherical protrusion 227 is detached from the inside of the liquid outlet interface tube 223, and the liquid in the liquid outlet interface tube 223 can flow to the liquid outlet tube 202 through the liquid hole 228 on the annular connecting portion 226.

[0042] In order to further and more intuitively observe whether the second blocking mechanism is in a blocking state, it also includes a guide rod 229 connected to the bottom of the liquid collection box 213, and a limit plate 230 is sleeved on the guide rod 229. The end of the limit plate 230 away from the guide rod 229 is rotatably connected to the outer wall of the liquid outlet pipe interface 224. A clamping mounting plate 232 is also installed on the guide rod 229, and the drive component housing 204 is installed on the clamping mounting plate 232. A guide rod 229 mounting seat is arranged at the bottom of the liquid collection box 213, and the guide rod 229 is connected to the guide rod 229 mounting seat. The lower end surface of the guide rod 229 mounting seat constitutes a first limiting surface, and the upper end surface of the clamping mounting plate constitutes a second limiting surface. The cooperation between the first limiting surface and the second limiting surface can prevent the liquid outlet pipe interface 224 from excessively moving on the liquid outlet interface pipe 223, and can be designed that when the limiting plate 230 moves upward to the first limiting surface, the second blocking mechanism is in a blocking state, and when the limiting plate 230 moves downward to the second limiting surface, the second blocking mechanism is in an open state.

[0043] During specific filling, the small opening of the specimen bag 5 is just placed on the opening of the liquid outlet tube 202, and the two clamping plates 203 are used to clamp the bag opening of the specimen bag 5 to maintain the position of the specimen bag 5; after clamping, the liquid outlet tube interface 224 can be rotated downward to open the second blocking mechanism and at the same time the liquid outlet tube 202 can be further extended into the specimen bag 5, and then the first blocking mechanism is opened to allow the formalin in the measuring cylinder 214 to flow into the specimen bag 5; after the formalin is poured into the specimen bag 5, the liquid outlet tube interface 224 is rotated upward by one hand to allow the second blocking mechanism to block the liquid outlet tube 202, and at the same time the liquid outlet tube 202 withdraws from the bag opening of the specimen bag 5, and the other hand is used to pinch the small opening of the specimen bag 5 to complete the sealing of the specimen bag 5, and then the filling is completed.

[0044] It is easy to understand that those skilled in the art can combine, split, reorganize, etc. the embodiments of the present application to obtain other embodiments based on one or several embodiments provided in the present application, and these embodiments do not exceed the protection scope of the present application.

[0045] In conclusion, the above is only a preferred embodiment of the present invention, and all equivalent changes and modifications made according to the scope of the patent application of the present invention should fall within the scope of the patent of the present invention.

Claims

1. A sealed formalin transfer device for specimen preservation, characterized in that: It comprises a bottle mouth connecting component (1), a bag mouth connecting component (2), and a connecting pipe (3) connected between the bottle mouth connecting component (1) and the bag mouth connecting component (2); The bottle mouth connecting assembly (1) comprises a bottle cap (101) for connecting to the bottle mouth of a formalin filling bottle (4), a liquid suction assembly (102) arranged on the bottle cap (101), and a liquid suction tube (103) extending into the formalin filling bottle (4); the connecting tube (3) is connected to the liquid suction tube (103) via the liquid suction assembly (102); The bag opening connection component (2) comprises a clamping component (201) for clamping the specimen bag (5) and a liquid outlet tube (202) capable of extending from the bag opening of the specimen bag (5) into the specimen bag (5); the liquid outlet tube (202) is in communication with the connection tube (3).

2. The sealed formalin transfer device for specimen preservation according to claim 1, characterized in that: The bottle cap (101) comprises a cover body (104) which is threadedly connected to the mouth of a formalin filling bottle (4); a liquid suction cylinder (105) which is capable of extending from the mouth of the formalin filling bottle (4) into the formalin filling bottle (4) and has an upper end open is provided in the middle of the cover body (104); a liquid suction cavity (106) is formed inside the liquid suction cylinder (105); a liquid suction tube (103) is connected to the bottom of the liquid suction cavity (106); and a first one-way valve (107) which communicates from the liquid suction tube (103) toward the liquid suction cavity (106) is provided at the connection.

3. The sealed formalin transfer device for specimen preservation according to claim 2, characterized in that: The liquid suction component (102) comprises a liquid suction piston (108) whose lower end can move up and down in the liquid suction chamber (106) and whose upper end protrudes out of the liquid suction chamber (106); a piston channel (109) is formed in the middle of the liquid suction piston (108); the liquid suction component (102) further comprises a pressing spring (110) which is arranged in the liquid suction chamber (106) and whose upper end abuts against the liquid suction piston (108); a pressing member (111) for pressing the liquid suction piston (108) is provided at the upper end of the liquid suction piston (108); a pressing member channel (112) is provided in the pressing member (111) whose two ends are respectively connected to the connecting pipe (3) and the piston channel (109); and a second one-way valve (113) is provided between the pressing member channel (112) and the piston channel (109) and which communicates from the piston channel (109) toward the pressing member channel (112).

4. The sealed formalin transfer device for specimen preservation according to claim 1, characterized in that: The clamping assembly (201) comprises two clamping plates (203) capable of moving toward or away from each other and a clamping plate driving assembly for driving the clamping plates (203) to move, the clamping plate driving assembly comprising a driving assembly housing (204), a lead screw (205) being arranged inside the driving assembly housing (204), a clamping plate connecting member (206) being threadedly connected to the lead screw (205), the clamping plate connecting member (206) being arranged at one end of the clamping plate (203), and a lead screw knob (207) being coaxially connected to the lead screw (205) and used for driving the lead screw (205) to rotate being arranged outside the driving assembly housing (204).

5. The sealed formalin transfer device for specimen preservation according to claim 1, characterized in that: The clamping plate (203) comprises a first plate body (208), a second plate body (209) and a semicircular ring (210) arranged between the first plate body (208) and the second plate body (209); a connecting piece of the clamping plate (203) is arranged at an end of the first plate body (208) away from the semicircular ring (210); the semicircular rings (210) on the two clamping plates (203) can together form a circular clearance hole (211) for the liquid outlet pipe (202) to pass through.

6. The sealed formalin transfer device for specimen preservation according to claim 1, characterized in that: The bag opening connection assembly (2) further comprises a base (212), on which a liquid collection box (213) and a measuring cylinder (214) arranged on the liquid collection box (213) are provided, and the liquid outlet pipe (202) is connected to the bottom of the liquid collection box (213); A collection box liquid inlet (215) is provided on the upper end plate of the liquid collection box (213); the upper end of the measuring cylinder (214) is connected to the connecting pipe (3), and the lower end is communicated with the collection box liquid inlet (215); and a first blocking mechanism for blocking the collection box liquid inlet (215) is provided at the liquid collection box (213).

7. The sealed formalin transfer device for specimen preservation according to claim 6, characterized in that: The first blocking mechanism comprises a blocking plate (216) disposed in the liquid collection box (213); one end of the blocking plate (216) can be rotated to the lower end of the collection box liquid inlet (215) to block the collection box liquid inlet (215); the other end is connected to a blocking plate knob (217) located outside the liquid collection box (213) and used to rotate the blocking plate (216).

8. The sealed formalin transfer device for specimen preservation according to claim 7, characterized in that: The blocking plate knob (217) is connected to the blocking plate (216) via a connecting rod (218) extending out of the liquid collection box (213); a connecting rod mounting opening (231) is provided on the liquid collection box (213); a sealing rubber ring (219) is provided between the connecting rod (218) and the connecting rod mounting opening (231); a blocking spring (220) is sleeved on the connecting rod (218) for driving the blocking plate (216) to move toward the lower end of the collection box liquid inlet (215); and a rubber pad (221) is provided on the upper end surface of the blocking plate (216).

9. The sealed formalin transfer device for specimen preservation according to claim 6, characterized in that: The lower end of the liquid collection box (213) is configured as a conical shell (222) with a gradually decreasing cross-section; the lower end of the conical shell (222) is provided with a liquid outlet interface pipe (223); a liquid outlet pipe interface (224) is threadedly connected to the liquid outlet interface pipe (223); the liquid outlet pipe (202) is connected to the liquid outlet pipe interface (224); a second blocking mechanism for blocking the liquid outlet pipe (202) is provided at the liquid outlet pipe interface (224); the second blocking mechanism comprises a liquid outlet interface (223) and a liquid outlet interface (224) disposed at the liquid outlet pipe interface (224). A blocking valve core (225) is disposed on the inner wall of the pipe interface (224), wherein the blocking valve core (225) comprises an annular connecting portion (226) and a hemispherical protrusion (227) disposed in the middle of the annular connecting portion (226), wherein a plurality of liquid passage holes (228) are evenly disposed on the annular connecting portion (226), and the hemispherical protrusion (227) can extend from bottom to top into the liquid outlet interface pipe (223) under the action of the liquid outlet pipe interface (224) and block the liquid outlet interface pipe (223).

10. The sealed formalin transfer device for specimen preservation according to claim 9, characterized in that: It also includes a guide rod (229) connected to the bottom of the liquid collection box (213), a limit plate (230) is sleeved on the guide rod (229), and an end of the limit plate (230) away from the guide rod (229) is rotatably connected to the outer wall of the liquid outlet pipe interface (224).

Images