Wall-mounted anti-freezing solar water meter box

Abstract

The invention discloses a wall-mounted anti-freezing solar water meter box, and relates to the field of solar water meter boxes, the wall-mounted anti-freezing solar water meter box comprises a main box body and a main box cover mounted on the outer side of the main box body in a clamping manner, a belt spring hasp is fixedly mounted on the outer side of the main box body, and the end, away from the main box body, of the belt spring hasp is connected with the main box cover in a clamping manner; a solar concentrator and solar intelligent water meters are fixedly installed in the main box body, and the solar intelligent water meters are arranged in the main box body at equal intervals. The wall-mounted anti-freezing solar water meter box is composed of a box body and a box cover, one side of the box body and one side of the box cover are connected through three cross hinges, the other side of the box body and one side of the box cover are buckled through three hasps with springs, the hasps with the springs can be locked through a padlock to prevent man-made damage, a foaming layer is arranged between an outer shell and an inner container, the foaming layer is made of polyurethane foam, and the foaming layer is made of polyurethane foam. Foaming is completed through the two-component liquid foaming machine, it can be ensured that the water meter in the water meter cannot be frozen in severe cold weather, and the good heat preservation effect is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of solar water meter boxes, in particular to a wall-mounted antifreeze solar water meter box. Background Art

[0002] Traditional water meters are usually installed in each household or in the stairwell. They can display the user's water consumption in real time. The water meter is usually powered by a battery and displays the user's degree. When the meter reader is reading the meter, he can open the meter cover to read it directly. However, the existing water meter box still has certain use defects during use. When the meter reader is reading the meter, he needs to read the meter number of the user. During the meter reading process, the meter reader needs to climb up the stairs one floor at a time to read the meter, which increases the difficulty of meter reading and prolongs the time of meter reading. Patent application publication number CN216012380U discloses a water meter box that is convenient for checking water meter readings. A group of isolation plates made of waterproof material are arranged under each group of water meter devices, and a water collection tank is opened on the upper surface of the isolation plate. A water immersion alarm device is arranged in the water collection tank. Once a water meter device leaks, the leaked water source falls into the water collection tank and is detected by the water immersion alarm device. The water immersion alarm device will send an alarm signal to the user corresponding to the group of water meter devices through wireless transmission at the first time, thereby timely avoiding the waste of water source. At the same time, the drainage holes and drainage pipes arranged can discharge the leaked water source out of the box, thereby avoiding the leaked water source from damaging other water meter devices, thereby forming a protective effect on the box body and the water meter device. This design effectively solves the problem of the traditional water meter box that no water leakage alarm device is arranged in the device. Patent application publication number CN221425740U discloses a water meter box structure, which is placed outside the water meter for protection. The reinforcing net is located on the inner wall of the water meter box. The reinforcing net can be used to effectively enhance the structural strength of the water meter box. The embedded plate provided by the water meter box is buried in the soil, which increases the contact area with the soil. When the water meter box is hit, the embedded plate effectively plays a stabilizing role. The reinforcing assembly is used to fix the water pipe, which further enhances the installation strength. The water pipe is wrapped with a binding band, and the end away from the connecting block passes through the embedded plate and extends between the connecting block and the movable block. The clamping block on the movable block fixes the binding band through the resetting property of the spring, thereby further improving the stability of the water meter box. The above-mentioned public patent solves the above-mentioned problems. The emergence of the iron water meter box solves the problem of centralized installation of water meters. However, the water meter box still has the following problems during use. In the cold winter outdoors, due to the poor thermal insulation performance of the traditional iron water meter box, it is easy to cause the water flow inside the water pipe to freeze and freeze, and it is easy to cause the water pipe to crack and the water meter to be damaged, resulting in waste of water resources and inconvenience in water use.

[0003] In view of the above problems, it is urgent to carry out innovative design based on the original water meter box structure. Summary of the invention

[0004] The purpose of the present invention is to provide a wall-mounted antifreeze solar water meter box to solve the problem raised in the above-mentioned background technology that in the cold winter outdoors, due to the poor thermal insulation performance of the traditional iron water meter box, the water flow inside the water pipe is easily frozen, the water pipe is easily cracked, and the water meter is frozen, resulting in a waste of water resources and inconvenience in water use.

[0005] To achieve the above object, the present invention provides the following technical solution: a wall-mounted antifreeze solar water meter box, comprising a main box body and a main box cover snap-fitted and installed on the outside of the main box body; A spring buckle is fixedly installed on the outer side of the main box body, and one end of the spring buckle away from the main box body is snap-connected with the main box cover, a tempered glass window is fixedly installed inside the main box cover, and a cross hinge is fixedly installed between the main box body and the main box cover; A solar energy concentrator and a solar energy smart water meter are fixedly installed inside the main box, and the solar energy smart water meter is equidistantly arranged inside the main box. A water inlet pipe and a water outlet pipe are fixedly installed at the lower end of the main box, and the diameter of the water inlet pipe is smaller than the diameter of the water outlet pipe. A water inlet pipe opening is arranged at the upper end of the water inlet pipe, and a water outlet pipe opening is arranged at the upper end of the water outlet pipe. The tempered glass window is located at the front end of the main box cover, and the solar energy concentrator and the solar energy smart water meter are located at the rear end of the tempered glass window.

[0006] Preferably, the interior of the main box body is provided with an outer box shell and an inner box liner, and the inner box liner is located inside the outer box shell, and reinforcing ribs are fixedly installed between the outer box shell and the inner box liner, and a first foaming layer is filled between the outer box shell and the inner box liner.

[0007] Preferably, a sealing groove is provided at the outer edge of the box body, and a hanging ear is fixedly installed on the outer side of the box body shell, and the hanging ear is located at the upper and lower ends of the box body shell.

[0008] Preferably, a box cover outer shell and a box cover inner shell are provided inside the main box cover, and the box cover inner shell is located inside the box cover outer shell, and an external reinforcing rib is fixedly installed between the box cover outer shell and the box cover inner shell.

[0009] Preferably, a second foaming layer is filled between the box cover outer shell and the box cover inner shell, and a box cover sealing groove is provided at one end of the box cover inner shell close to the box cover inner shell, and a side foam sealing strip is nested inside the box cover sealing groove.

[0010] Preferably, the main box body and the main box cover are both made of fiberglass or plastic, and the thickness of the main box body and the main box cover are both three millimeters. The first foam layer and the second foam layer are both made of polyurethane foam, and the thickness of the first foam layer and the second foam layer are both fifty millimeters.

[0011] Preferably, two sets of sliding grooves are opened on the outer side of the main box cover, and sliding blocks are slidably installed inside the sliding grooves, and a limiting ball is nested and installed on one side of the sliding block close to the sliding groove.

[0012] Preferably, a push plate is fixedly mounted on one end of the sliding block away from the main box cover, and a limit plate is fixedly mounted on one side of the pushing plate close to the main box cover, and the limit plate and the pushing plate are located at the front end of the tempered glass window.

[0013] Preferably, a cleaning plate is slidably installed inside the limiting plate, and the end of the cleaning plate away from the limiting plate is in contact with the tempered glass window, and a telescopic rod is fixedly installed on the end of the cleaning plate close to the limiting plate, the end of the telescopic rod away from the cleaning plate is fixedly connected to the pushing plate, and a supporting spring is sleeved on the outer side of the telescopic rod, and four groups of supporting springs and telescopic rods are equidistantly arranged.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The main body of the water meter box is composed of a box body and a box cover. The box body and the box cover are connected by three cross hinges on one side and buckled with three spring buckles on the other side. The spring buckles can be locked with a padlock to prevent human damage; 2. The box body and the box cover are made of 3mm thick fiberglass or plastic. In order to ensure the consistency and reliability of foaming, they are divided into two parts: the outer shell and the inner liner. The outer shell is provided with reinforcing ribs in a grid distribution to separate the outer shell and the inner liner and play a supporting and reinforcing role. The outer shell and the inner liner are separated by a foaming layer. The foaming layer is made of polyurethane foam with a thickness of 50mm. The foaming is completed by a two-component liquid foaming machine, which can ensure that the internal water meter will not freeze in severe cold weather, so as to achieve a good thermal insulation effect; 3. The tempered glass window uses laminated tempered glass with high strength and good light transmittance, which is convenient for observing the water meter readings. At the same time, it can transmit light so that the solar cells on the solar concentrator can obtain the light source for power generation; 4. A solar concentrator is arranged on the upper part of the box body. The solar concentrator can convert the collected solar energy into chemical energy through the solar panels thereon and store it in the solar cells, and supply power to the solar smart water meter. The battery does not need to be replaced during the effective service period; 5. A flat sealing groove is designed at the lid of the box body, which is sealed with a side bubble sealing strip. The side bubble sealing strip is made of EPDM rubber, which has a large compression volume and a good sealing effect. The EPDM rubber has outstanding aging resistance and ozone resistance, which can better ensure the sealing and heat preservation of the water meter box in an open air environment, so as to ensure that the water meter does not freeze in a low temperature environment; 6. A sealing groove is provided at the lid of the inner liner of the box, and its groove shape corresponds to the side bubble sealing strip of the box body and fits well, which can ensure the tightness of the side bubble sealing strip and achieve a refrigerator-level sealing effect; 7. The water inlet and outlet ports are located on the left and right sides of the lower part of the box, and the middle is connected with the water inlet and outlet pipes respectively. The water inlet and outlet pipes can wrap the insulation shell to better protect the water pipes, improve the effectiveness of the box insulation, and avoid freezing and damage to the water pipes; 8. Two hanging ears and one hanging nose are respectively arranged on the upper and lower parts of the box body, and the hanging nose can be fastened to the wall with M10 expansion bolts. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a front view structural schematic diagram of the present invention; Figure 3 This is a schematic diagram of the three-dimensional structure of the main box of the present invention; Figure 4 This is a schematic diagram of the cutaway structure of the main box of the present invention; Figure 5 It is a schematic diagram of the partial cutaway structure of the main box of the present invention; Figure 6 This is a schematic diagram of the top cross-sectional structure of the push plate of the present invention; Figure 7 This is a schematic diagram of the three-dimensional structure of the push plate of the present invention; Figure 8 This is a schematic diagram of a cutaway three-dimensional structure of a push plate of the present invention; Fig. 9 It is a schematic diagram of the side cross-sectional structure of the outer shell of the box body of the present invention; Fig.10 For the present invention Fig. 9 A is an enlarged structural diagram; Fig.11 For the present invention Figure 5 The enlarged structural diagram at B in FIG.

[0016] In the figure: 1. main box body; 2. main box cover; 3. tempered glass window; 4. spring buckle; 5. cross hinge; 6. solar concentrator; 7. solar smart water meter; 8. water inlet pipe; 9. water outlet pipe; 10. sliding groove; 11. sliding block; 12. limit ball; 13. push plate; 14. limit plate; 15. cleaning plate; 16. telescopic rod; 17. support spring; 111. outer shell of the box body; 112. inner liner of the box body; 113. reinforcing rib; 114. first foaming layer; 115. sealing groove; 116. hanging ear; 117. water inlet pipe port; 118. water outlet pipe port; 211. outer shell of the box cover; 212. inner liner of the box cover; 213. external reinforcing rib; 214. second foaming layer; 215. side bubble sealing strip; 216. sealing groove of the box cover. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] Embodiment 1: This embodiment Figure 1-Figure 4 As shown, in order to solve the problem that the existing solar water meter box can only supply power to a single water meter, a process in which the water meter box can supply power to multiple water meters is disclosed, and the specific contents are as follows: A main box body 1 and a main box cover 2 mounted on the outer side of the main box body 1; A spring buckle 4 is fixedly installed on the outer side of the main box body 1, and the end of the spring buckle 4 away from the main box body 1 is snap-connected with the main box cover 2, a tempered glass window 3 is fixedly installed inside the main box cover 2, and a cross hinge 5 is fixedly installed between the main box body 1 and the main box cover 2; A solar concentrator 6 and a solar smart water meter 7 are fixedly installed inside the main box body 1, and the solar smart water meter 7 is equidistantly arranged inside the main box body 1. An inlet pipe 8 and an outlet pipe 9 are fixedly installed at the lower end of the main box body 1, and the diameter of the inlet pipe 8 is smaller than the diameter of the outlet pipe 9, and an inlet pipe opening 117 is arranged at the upper end of the inlet pipe 8, and a water outlet pipe opening 118 is arranged at the upper end of the outlet pipe 9. The tempered glass window 3 is located at the front end of the main box cover 2, and the solar concentrator 6 and the solar smart water meter 7 are located at the rear end of the tempered glass window 3.

[0019] A cleaning plate 15 is slidably mounted inside the limiting plate 14, and one end of the cleaning plate 15 away from the limiting plate 14 contacts the tempered glass window 3, and a telescopic rod 16 is fixedly mounted on one end of the cleaning plate 15 close to the limiting plate 14, and one end of the telescopic rod 16 away from the cleaning plate 15 is fixedly connected to the push plate 13, and a support spring 17 is sleeved on the outer side of the telescopic rod 16, and four groups of support springs 17 and telescopic rods 16 are equidistantly arranged. When using the wall-mounted antifreeze solar water meter box, first install the water meter box at the location where it needs to work. After the water meter box is installed, the solar concentrator 6 and the solar smart water meter 7 inside the water meter box can be operated, thereby realizing the function of automatic power supply; The main box body 1 and the main box cover 2 are connected by three cross hinges 5 on the left side and buckled by three spring buckles 4 on the right side. The main box body 1 and the main box cover 2 buckled with spring buckles 4 can be locked with a padlock to prevent human damage; The main box cover 2 is inlaid with a tempered glass window 3, which can effectively transmit sunlight so that the solar energy concentrator 6 located at the upper part of the box body can collect solar energy through the solar panel on it and convert it into chemical energy and store it in the solar cell, and power the solar smart water meter 7. The battery does not need to be replaced during the effective service period. The water inlet pipe 8 and the water outlet pipe 9 are located on the left and right sides of the lower part of the box body, and can be wrapped with a heat-insulating shell to better protect the water pipes and prevent the water pipes from freezing and damage; There are multiple groups of solar smart water meters 7 arranged inside the main box 1, which can realize direct display of water consumption of multiple users. At the same time, the solar concentrator 6 can supply power to multiple solar smart water meters 7, realizing multiple uses of one box.

[0020] Embodiment 2: This embodiment is as follows Figure 1-Figure 5 As shown, in order to solve the problem of poor thermal insulation effect of the existing solar water meter box, the thermal insulation process of the thermal insulation structure of the water meter box is disclosed, and the specific contents are as follows: The main box body 1 is provided with an outer shell 111 and an inner liner 112, and the inner liner 112 is located inside the outer shell 111, and a reinforcing rib 113 is fixedly installed between the outer shell 111 and the inner liner 112, and a first foaming layer 114 is filled between the outer shell 111 and the inner liner 112; A sealing groove 115 is provided at the outer edge of the box body 112 , and a hanging ear 116 is fixedly installed on the outer side of the box body shell 111 , and the hanging ear 116 is located at the upper and lower ends of the box body shell 111 .

[0021] The main box cover 2 is provided with a box cover outer shell 211 and a box cover inner shell 212, and the box cover inner shell 212 is located inside the box cover outer shell 211, and an external reinforcing rib 213 is fixedly installed between the box cover outer shell 211 and the box cover inner shell 212; A second foaming layer 214 is filled between the box cover outer shell 211 and the box cover inner shell 212 , and a box cover sealing groove 216 is provided at one end of the box cover inner shell 212 close to the box body 112 , and a side foam sealing strip 215 is nested inside the box cover sealing groove 216 .

[0022] The main box body 1 and the main box cover 2 are made of 3mm thick fiberglass or plastic. In order to ensure the consistency and reliability of foaming and the insulation effect in severe cold weather, the inner lining is made of polyurethane foam with a thickness of 50mm, which is completed by a two-component liquid foaming machine; The tempered glass window 3 is made of laminated tempered glass, which has high strength and good light transmittance, so as to facilitate observation of water meter readings. At the same time, it can transmit light so that the solar cells on the solar concentrator 6 can obtain a power generation light source. A plane sealing groove 115 is designed at the closing position of the box body 112, and is sealed with an EPDM rubber side bubble sealing strip 215, which has a large compression amount and a good sealing effect. The EPDM rubber has outstanding aging resistance and ozone resistance, which can better ensure the sealing and heat preservation of the water meter box in an open air environment, so as to ensure that the water meter does not freeze in a low temperature environment; A corresponding box cover sealing groove 216 is designed at the closing position of the box cover inner liner 212 corresponding to the box body side bubble sealing strip 215, which can ensure the tightness of the sealing of the side bubble sealing strip 215; A water inlet pipe 117 with an inner diameter of Φ50 is arranged on the left side of the lower part of the main box body 1, and a water outlet pipe 118 with an inner diameter of Φ70 is arranged on the right side, and a water inlet pipe 8 and a water outlet pipe 9 are respectively connected in the middle, and the PPR water inlet and outlet pipes 9 can be wrapped with thermal insulation materials to improve the effectiveness of thermal insulation; The upper part and the lower part of the main box body 1 are respectively provided with two and one hanging ears 116, which can be fastened to the wall with M10 expansion bolts.

[0023] Embodiment 3: This embodiment is as follows Figure 1 and Figure 6-Figure 11 As shown, in order to solve the problem that the existing solar water meter box is inconvenient to clean, the process of cleaning the tempered glass window 3 of the solar water meter box is disclosed, and the specific content is as follows: The main box body 1 and the main box cover 2 are both made of fiberglass or plastic, and the thickness of the main box body 1 and the main box cover 2 are both three millimeters. The first foam layer 114 and the second foam layer 214 are both made of polyurethane foam material, and the thickness of the first foam layer 114 and the second foam layer 214 are both fifty millimeters.

[0024] Two sets of sliding grooves 10 are formed on the outer side of the main box cover 2 , and sliding blocks 11 are slidably installed inside the sliding grooves 10 , and a limiting ball 12 is nested and installed on one side of the sliding block 11 close to the sliding groove 10 .

[0025] A push plate 13 is fixedly installed on one end of the sliding block 11 away from the main box cover 2, and a limit plate 14 is fixedly installed on one side of the pushing plate 13 close to the main box cover 2, and the limit plate 14 and the pushing plate 13 are located at the front end of the tempered glass window 3; During the use of the water meter box, when the staff reads the meter through the tempered glass window 3, they can directly observe the reading of the solar smart water meter 7 through the tempered glass window 3. During the use of the water meter box, dust may adhere to the surface of the tempered glass window 3. At this time, the dust adhered to the surface of the tempered glass window 3 needs to be cleaned to avoid affecting the light intensity received by the solar concentrator 6. At this time, the staff needs to push the pushing plate 13 to move upward, and the pushing plate 13 will drive the sliding block 11 to slide upward inside the sliding groove 10, and the sliding process of the sliding block 11 will make the limiting ball 12 slide inside the sliding groove 10, thereby reducing the friction force of the sliding block 11 during the sliding process, and the movement of the pushing plate 13 will drive the limiting plate 14 and the cleaning plate 15 to move upward synchronously, and the cleaning plate 15 will clean the dust adhered to the outer side of the tempered glass window 3 during the upward movement, and the pushing plate 13 will be released after the pushing plate 13 moves to the upper end of the sliding groove 10, and the pushing plate 13 will automatically slide downward due to the action of gravity, and the cleaning plate 15 will move downward, and the tempered glass window 3 will be cleaned again during the downward movement of the cleaning plate 15; While the cleaning plate 15 is working, it will be worn out by the tempered glass window 3. At this time, the telescopic rod 16 and the supporting spring 17 will expand and push the cleaning plate 15 to slide inside the limiting plate 14, so that the cleaning plate 15 is always in contact with the tempered glass window 3, thereby ensuring the cleaning effect of the tempered glass window 3 and increasing the overall practicality.

[0026] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A wall-mounted antifreeze solar water meter box, comprising a main box body (1) and a main box cover (2) snap-fitted and mounted on the outer side of the main box body (1); A spring buckle (4) is fixedly mounted on the outer side of the main box body (1), and one end of the spring buckle (4) away from the main box body (1) is snap-fitted and connected to the main box cover (2), a tempered glass window (3) is fixedly mounted inside the main box cover (2), and a cross hinge (5) is fixedly mounted between the main box body (1) and the main box cover (2); Features: A solar energy concentrator (6) and a solar energy intelligent water meter (7) are fixedly installed inside the main box (1), and the solar energy intelligent water meter (7) is arranged at equal intervals inside the main box (1). A water inlet pipe (8) and a water outlet pipe (9) are fixedly installed at the lower end of the main box (1), and the diameter of the water inlet pipe (8) is smaller than the diameter of the water outlet pipe (9), and a water inlet pipe opening (117) is arranged at the upper end of the water inlet pipe (8), and a water outlet pipe opening (118) is arranged at the upper end of the water outlet pipe (9). The tempered glass window (3) is located at the front end of the main box cover (2), and the solar energy concentrator (6) and the solar energy intelligent water meter (7) are located at the rear end of the tempered glass window (3).

2. A wall-mounted antifreeze solar water meter box according to claim 1, characterized in that: An outer casing (111) and an inner casing (112) are provided inside the main casing (1), and the inner casing (112) is located inside the outer casing (111), and reinforcing ribs (113) are fixedly installed between the outer casing (111) and the inner casing (112), and a first foaming layer (114) is filled between the outer casing (111) and the inner casing (112).

3. A wall-mounted antifreeze solar water meter box according to claim 2, characterized in that: A sealing groove (115) is provided at the outer edge of the box inner shell (112), and a hanging ear (116) is fixedly installed on the outer side of the box outer shell (111), and the hanging ear (116) is located at the upper and lower ends of the box outer shell (111).

4. A wall-mounted antifreeze solar water meter box according to claim 3, characterized in that: The main box cover (2) is provided with a box cover outer shell (211) and a box cover inner shell (212), the box cover inner shell (212) is located inside the box cover outer shell (211), and an external reinforcing rib (213) is fixedly installed between the box cover outer shell (211) and the box cover inner shell (212).

5. A wall-mounted antifreeze solar water meter box according to claim 4, characterized in that: A second foaming layer (214) is filled between the box cover outer shell (211) and the box cover inner shell (212), and a box cover sealing groove (216) is provided at one end of the box cover inner shell (212) close to the box cover inner shell (112), and a side foam sealing strip (215) is nested and installed inside the box cover sealing groove (216).

6. A wall-mounted antifreeze solar water meter box according to claim 5, characterized in that: The main box body (1) and the main box cover (2) are both made of glass fiber reinforced plastic or plastic, and the thickness of the main box body (1) and the main box cover (2) are both three millimeters. The first foam layer (114) and the second foam layer (214) are both made of polyurethane foam material, and the thickness of the first foam layer (114) and the second foam layer (214) are both fifty millimeters.

7. The wall-mounted antifreeze solar water meter box according to claim 1, characterized in that: Two sets of sliding grooves (10) are provided on the outer side of the main box cover (2), and sliding blocks (11) are slidably installed inside the sliding grooves (10), and a limiting ball (12) is nested and installed on one side of the sliding block (11) close to the sliding groove (10).

8. A wall-mounted antifreeze solar water meter box according to claim 7, characterized in that: A push plate (13) is fixedly mounted on one end of the sliding block (11) away from the main box cover (2), and a limit plate (14) is fixedly mounted on one side of the pushing plate (13) close to the main box cover (2), and the limit plate (14) and the pushing plate (13) are located at the front end of the tempered glass window (3).

9. A wall-mounted antifreeze solar water meter box according to claim 8, characterized in that: A cleaning plate (15) is slidably mounted inside the limiting plate (14), and one end of the cleaning plate (15) away from the limiting plate (14) contacts the tempered glass window (3), and a telescopic rod (16) is fixedly mounted on one end of the cleaning plate (15) close to the limiting plate (14), and one end of the telescopic rod (16) away from the cleaning plate (15) is fixedly connected to the pushing plate (13), and a support spring (17) is sleeved on the outer side of the telescopic rod (16), and four groups of the support spring (17) and the telescopic rod (16) are equidistantly arranged.

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