Integrated pressure display device and dredger

Abstract

The utility model belongs to the technical field of dredgers, and particularly relates to an integrated pressure display device and a dredger. The dredger comprises a pressure display device, and the pressure display device comprises a pressure mounting seat which is integrally formed on the main mounting seat and is provided with a pressure cavity communicated with the air storage cavity; the pressure valve element is movably arranged in the pressure cavity and seals the pressure cavity; the pressure valve cover is installed at the outer end of the pressure cavity, and the pressure reset piece is installed between the pressure valve element and the pressure valve cover and used for resetting the pressure valve element. The pressure valve element can move according to the pressure of the air storage cavity, and therefore the pressure value of the air storage cavity is displayed through the position of the pressure valve element. The pressure mounting seat is integrally formed on the main mounting seat, so that the pressure valve core is directly and movably arranged in the pressure cavity, compared with a pressure display meter with a split design, a mounting sealing structure between the pressure mounting seat and the main mounting seat is reduced, and the reliability of the dredger is further ensured.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of dredger, and particularly relates to an integrated pressure display device and dredger. BACKGROUND

[0002] People often have the phenomenon of blockage of sewer pipes, toilets and the like in daily life, and a dredger can help people solve this problem. The existing dredger is usually a gas pressure type toilet dredger as proposed in the prior art patent CN218881073U. The inflator forms high-pressure gas by inflating the gas storage device through the one-way valve. The air release control device is used to control the release of high-pressure gas from the plug device of the gas outlet end of the gas storage device. Under the impact of powerful high-pressure gas, the sewer pipe or toilet is dredged.

[0003] The shell of the toilet dredger is further provided with a detection branch. One end of the detection branch is in communication with the piston cavity or the gas storage cavity, and the other end is in communication with the pressure display device. The pressure display device includes a partially transparent shell, a piston member, an elastic component, and an indicator. The lower end of the shell is inserted into the shell and is in communication with the detection branch. The piston member is in sealing cooperation with the inner wall of the shell. The piston member divides the inner cavity of the shell into a first partition cavity and a second partition cavity. The first partition cavity is in communication with the detection branch. When the air pressure in the first partition cavity increases, the piston member moves upward. The elastic component is arranged in the second partition cavity and cooperates with the air pressure received by the piston member. The indicator is a rubber ring that is sleeved on the piston member and is used to indicate the air pressure in the first partition cavity.

[0004] In this scheme, the shell of the pressure display device is connected to the detection branch through interference fit insertion. When the high pressure of the gas storage cavity acts, the interference fit shell body is prone to loosening or even falling off, thereby causing the gas storage cavity to leak, and the high-pressure gas cannot be formed in the gas storage device, which seriously affects the service life of the product and increases the cost of after-sales maintenance.

[0005] In addition, in this scheme, the pressure is determined according to the position of the internal indicator. Therefore, the shell of the pressure display device must be partially transparent, and a display window must be provided at the corresponding position of the shell, which increases the production cost and difficulty. SUMMARY

[0006] The utility model aims at providing a kind of integrated pressure display device and dredger with simple structure, stable installation and reliable performance.

[0007] The utility model is realized as follows:

[0008] The utility model provides a kind of integrated pressure display device, for being set on the main mounting seat of dredger, and display the gas storage cavity pressure of dredger, with such characteristics, comprising: pressure mounting seat, integrally formed on main mounting seat, and with the pressure cavity being communicated with gas storage cavity;Pressure valve core, movably arranged in pressure cavity, and seal pressure cavity;Pressure valve cover, installed at the outer end of pressure cavity, and pressure reset piece, installed between pressure valve core and pressure valve cover, for resetting pressure valve core;Wherein, pressure valve core can be moved according to the pressure of gas storage cavity, so as to display the pressure value of gas storage cavity by the position of pressure valve core.

[0009] In the integrated pressure display device provided by the utility model, the pressure valve core can also have the following characteristics: the pressure valve core has a pressure sealing part for sealing the pressure cavity and a pressure valve rod part, the pressure valve rod part extends out of the pressure cavity after sequentially passing through the pressure reset piece and the pressure valve cover, and the pressure value of the gas storage cavity is displayed by the extension distance of the pressure valve rod part.

[0010] In the integrated pressure display device provided by the utility model, the pressure sealing part can also have the following characteristics: a pressure sealing ring is arranged on the pressure sealing part.

[0011] In the integrated pressure display device provided by the utility model, the pressure valve cover can also have the following characteristics: the pressure valve cover has an annular pressure cover body matched with the pressure cavity and an outward turned edge arranged at the outer end of the annular pressure cover body, and the annular pressure cover body is in transition fit or interference fit with the pressure mounting seat.

[0012] A dredger comprises a main mounting seat, an inflator arranged at one side of the main mounting seat and having an inflator cavity, a gas storage device arranged at the other side of the main mounting seat and having a gas storage cavity communicated with the inflator cavity, and a pressure display device arranged on the main mounting seat and communicated with the gas storage cavity, wherein the pressure display device is the integrated pressure display device described above.

[0013] In the dredger provided by the utility model, the dredger can also have the following characteristics: the dredger further comprises a shell, and an abutting part is arranged on the inner wall of the shell, so that when the shell is fixed on the main mounting seat, the abutting part is used for fixing the pressure valve cover on the pressure mounting seat and preventing the pressure valve cover from being separated from the pressure cavity.

[0014] In the dredger provided by the utility model, the dredger can also have the following characteristics: a receiving groove is arranged on the shell, a receiving hole is arranged on the side wall of the receiving groove and used for allowing the pressure valve rod part of the pressure valve core to pass through, and a pressure scale line is arranged on the extension end of the receiving groove or the pressure valve rod part.

[0015] In the drain pipe of the utility model, the inflator device comprises: an inflator integrally formed on the main mounting base; an inflator rod movably arranged in the inflator cavity; and an end cover installed on the end of the inflator away from the main mounting base, wherein the shell is sleeved on the outer periphery of the inflator and fixed between the main mounting base and the end cover.

[0016] In the drain pipe of the utility model, the end cover has an inner ring part and an outer ring part, the inner side of the inner ring part is formed with a through hole for the inflator rod to pass through, the inner wall of the outer ring part is formed with an inner threaded part connected with the inflator, and the outer end of the inflator is provided with an outer threaded part, when the end cover is threadedly connected on the inflator, one end of the shell abuts against the main mounting base, and the other end abuts against the outer ring part.

[0017] In the drain pipe of the utility model, the main mounting base is provided with at least one positioning protrusion on the end surface close to the inflator, and the inner wall of the shell is provided with at least one positioning groove matched with the positioning protrusion.

[0018] The utility model has the following prominent and beneficial technical effects compared with the prior art:

[0019] 1、The pressure mounting base of the utility model is integrally formed on the main mounting base, so that the pressure valve core is movably arranged in the pressure cavity, compared with the split design of the pressure display table, the installation sealing structure between the pressure mounting base and the main mounting base is reduced, which is equivalent to reducing one air leakage hidden danger, and the reliability of the drain pipe is further ensured.

[0020] 2、The pressure valve core of the utility model can move according to the pressure of the gas storage cavity, when the pressure of the gas storage cavity is relatively low, the pressure sealing part of the pressure valve core is pressed close to the pressure gas port position under the action of the pressure reset part, and the pressure valve rod part extends out of the containing groove with a relatively short distance;When the pressure of the gas storage cavity increases, the pressure of the pressure cavity also increases, which can overcome the force of the pressure reset part and push the pressure sealing part of the pressure valve core to move towards the position of the pressure valve cover, so that the distance of the pressure valve rod part extending out of the containing groove is increased, so that the pressure value of the gas storage cavity is displayed through the extension distance of the pressure valve rod part, so that the user can view and know the air pressure in the gas storage cavity in real time. The structure does not need to be designed to be transparent, which reduces the material cost, and facilitates assembly.

[0021] 3、The inner wall of the shell of the utility model is provided with an abutting part, the abutting part is two tabs extending in the inner wall of the containing groove and the inner wall of the shell, when the shell is fixed on the main mounting base, the abutting part is used for fixing the pressure valve cover on the pressure mounting base, so as to prevent the pressure valve cover from loosening or falling off under the high pressure of the pressure reset part or the pressure cavity. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is structural schematic diagram of the dredger of the utility model.

[0023] Figure 2 It is sectional view of the dredger of the utility model.

[0024] Figure 3 It is sectional view of the inflator of the utility model.

[0025] Figure 4 It is structural exploded view of the inflator of the utility model.

[0026] Figure 5 It is structural schematic diagram of the air inlet check valve and the deflation control device of the utility model.

[0027] Figure 6 It is sectional view of the air inlet check valve and the deflation control device of the utility model.

[0028] Figure 7 It is internal structure schematic diagram of the shell of the utility model.

[0029] Meaning represented by the reference numeral in the drawing:

[0030] Inflator 1, gas storage device 2, pressure display device 3, deflation control device 4, air inlet check valve 5,

[0031] Main piston 10, inflator cylinder 11, inflating cavity 111, inflating rod 12, rod body 121, inflating piston 122, limit block 123, inflating sealing ring 124, hand holding part 13, fixed seat 131, handle 132, limit hole 133, insertion hole 134, main mounting seat 14, air inlet cavity 141, inner ring wall 142, outer ring wall 143, connecting cavity 144, one-way valve mounting hole 145, positioning protrusion 146, deflation mounting seat 15, deflation cavity 151, deflation port 152, end cover 17, inner ring part 171, outer ring part 172, through hole 173, shell 18, fixed part 180, abutting part 181, containing groove 182, containing hole 1821, pressure scale line 183, positioning groove 184,

[0032] Gas storage cylinder 21, gas storage mounting end 211, gas outlet 212, gas outlet pipe 22, gas outlet mounting seat 221, gas outlet cavity 23, gas storage cavity 24, gas outlet nozzle 25, rubber ring 26, gas outlet pipe support frame 27, gas storage sealing ring 28,

[0033] Pressure mounting seat 31, pressure cavity 311, pressure gas port 312, pressure valve core 32, pressure sealing part 321, pressure valve rod part 322, pressure sealing ring 323, pressure valve cover 33, annular pressure cover body 331, outward flange 332, pressure reset member 34, deflation button 41, deflation valve 42, deflation connecting rod 43, guide groove 431, guide protrusion 432, insertion end 433, air groove 434, deflation valve body 44, deflation sealing ring 441, deflation valve cavity 442, inner stop 444, outer stop 445, deflation valve core 45, deflation guide rod part 451, deflation sealing part 452, air passage groove 453, deflation sealing member 46, deflation elastic member 47. DETAILED DESCRIPTION

[0034] The utility model will be further described below in combination with specific embodiments:

[0035] It should be understood that the structure, proportion, size, etc. drawn in the drawings of the embodiments of the present application are only used to cooperate with the content disclosed in the specification, so that those skilled in the art can understand and read, and are not used to limit the conditions that can be implemented by the present application, so they do not have substantial technical significance. Any modification of structure, change of proportional relationship or adjustment of size, without affecting the effects and purposes that can be achieved by the present application, should still fall within the scope of the technical content disclosed by the present application. At the same time, the terms such as "inner" and "outer" used in the embodiments of the present application are only used for clear description, and not used to limit the scope of the present application. The change or adjustment of the relative relationship, without substantial change of technical content, is also considered as the scope of the present application that can be implemented.

[0036] When an element is referred to as being "connected", "disposed", "mounted" to another element, it can be directly connected to the other element or indirectly connected or disposed or mounted to the other element through a middle element.

[0037] In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that a person skilled in the art can implement it. When the combination of technical solutions appears contradictory or unimplementable, it should be considered that the combination of technical solutions does not exist and is not within the protection scope claimed by the present application.

[0038] The dredger of the present embodiment is used for dredging toilets or sewer pipes.

[0039] As shown in Figure 1 and Figure 2 , the dredger at least comprises a main mounting seat 14, an inflating device 1, a gas storage device 2, an air inlet one-way valve 5, a pressure display device 3 and a deflation control device 4.

[0040] The main mounting base 14 has a one-way valve mounting hole 145, in which an inlet one-way valve 5 is installed. The air pumping device 1 has an air pumping chamber 111, which is connected to the air inlet end of the inlet one-way valve 5. The air storage device 2 has an air storage chamber 24, which is connected to the air outlet end of the inlet one-way valve 5. The air pumping device 1 pumps the high-pressure gas from the air pumping chamber 111 into the air storage chamber 24 of the air storage device 2 through the inlet one-way valve 5. The main mounting base 14 is also provided with a venting mounting base 15 and a pressure mounting base 31, and is respectively equipped with a pressure display device 3 for detecting the pressure of the air storage chamber 24 and a venting control device 4 for controlling the release of high-pressure gas from the air storage cylinder 21.

[0041] like Figure 3 , 4 As shown, the air pump 1 includes an air pump 11, an air pump rod 12, an end cap 17, a housing 18, and a main piston 10, all made of plastic.

[0042] The air pump 11 and the main mounting base 14 can be installed separately or as a single unit. In this embodiment, the air pump 11, the main mounting base 14, the venting mounting base 15, and the pressure mounting base 31 are all integrally formed. Compared to the method of separately inserting the sealing rings onto the base 14, this reduces the corresponding sealing structure, improves the sealing performance of the product, and reduces the risk of air leakage from the air pumping device, the pressure display device 3, and the venting control device 4.

[0043] The air pump 11 is hollow and contains an air pumping chamber 111. One end of the air pump rod 12 is movably disposed within the air pumping chamber 111, and the other end extends out of the air pump 11 and is provided with a handle 13. The main mounting base 14 is located at the bottom of the air pump 11 and is used to mount the air storage cylinder 21. It is also hollow and contains an air intake chamber 141, within which the main piston 10 is movably disposed. In this embodiment, the axis of the air pumping chamber 111 is coaxial with the axis of the air intake chamber 141.

[0044] The main mounting base 14 is provided with an inner ring wall 142 and an outer ring wall 143. The inner side of the inner ring wall 142 is surrounded to form an air inlet cavity 141. A one-way valve mounting hole 145 is arranged between the air inlet cavity 141 and the inflating cavity 111. The air inlet one-way valve 5 is mounted in the one-way valve mounting hole 145. The gas in the inflating cavity 141 will push open the air inlet one-way valve 5 and then enter the air inlet cavity 141 and the gas storage cavity 24. The inner side of the outer ring wall 143 is provided with a mounting portion for mounting the gas storage cylinder 21. In this embodiment, the mounting portion is an internal thread. The gas storage cylinder 21 is provided with an external thread matched with the internal thread. The gas storage cylinder 21 is connected with the main mounting base 14 through the threads. The inner ring wall 142 and the outer ring wall 143 form a connecting cavity 144 connected with the inside of the gas storage cylinder 21. The air inlet cavity 141 is communicated with the connecting cavity 144. In the working process, the gas from the inflating cavity 111 enters the air inlet cavity 141 through the air inlet one-way valve 5 when the air inlet one-way valve 5 is opened. Then the gas enters the connecting cavity 144 (i.e. enters the gas storage cavity of the gas storage cylinder 21) through the gap between the air inlet cavity 141 and the main piston 10. In this process, the main piston 10 will move under the action of the high-pressure gas until it blocks the gas outlet pipe 22 in the gas storage cylinder 21.

[0045] In this embodiment, the air inlet cavity 141 and the gas storage cavity 24 are always connected through the gap between the air inlet cavity 141 and the main piston 10. Therefore, the gas entering the air inlet cavity 141 through the air inlet one-way valve 5 will enter the air inlet cavity 141 and the gas storage cavity 24 at the same time, and the high-pressure gas is stored. In other words, the air inlet cavity 141 can also be regarded as a "gas storage cavity" for the gas storage function.

[0046] The side wall of the inflator 11 near the end of the air inlet cavity is recessed inward and surrounded to form a cylindrical gas discharge mounting base 15. The gas discharge mounting base 15 is formed with a gas discharge cavity 151 connected with the air inlet cavity 141. The gas discharge valve is arranged on the gas discharge mounting base 15. The gas discharge cavity 151 and the air inlet cavity 141 are connected to form a gas discharge port 152. When the gas discharge valve is opened, the air inlet cavity 141 is communicated with the outside atmosphere. The gas in the air inlet cavity 141 can enter the gas discharge cavity 151 through the gas discharge port 152 and be discharged to the outside through the gas discharge control device 4 to form a low-pressure environment. Then the main piston 10 is pushed open by the high-pressure gas in the gas storage cavity, the gas outlet pipe 22 is opened, and the high-pressure gas in the gas storage cavity 24 is instantaneously discharged from the gas outlet pipe 22 to realize high-pressure clearing.

[0047] In this embodiment, the axis of the inflating cavity 111 is coaxially arranged with the axis of the air inlet cavity 141. The pressure mounting base 31 and the gas discharge mounting base 15 are respectively formed on the two sides of the inflator 11. Therefore, the gas discharge control device 4 and the pressure display device 3 can be respectively arranged on the two sides of the inflator 11.

[0048] The end cover 17 is installed at the end of the inflator 11 away from the main mounting base 14, and has an inner ring part 171 and an outer ring part 172. The inner ring part 171 has a through hole 173 for the inflator rod 12 to pass through, and the inner wall of the through hole 173 has a gap for gas to enter, so that when inflating, the external gas enters the inflation cavity 111 through the gap. The inner wall of the outer ring part 172 is formed with a connecting part connected to the inflator 11. In this embodiment, the connecting part is an internal thread part, and the top of the inflator 11 is formed with an external thread part corresponding to the internal thread part. The inflator 11 and the end cover 17 are connected by screwing. In actual cases, the mounting part can also be connected by buckling.

[0049] The shell 18 is sleeved on the outer periphery of the inflator 11, and one end of the shell 18 abuts against the outer ring wall 143 of the main mounting base 14, and the other end abuts against the outer ring part 172 of the end cover 17. That is, the main mounting base 14 and the end cover 17 clamp the shell 18 therebetween. Compared with the screw fixing method of the left and right shells in the prior art, the installation structure is greatly simplified, and the installation efficiency is improved.

[0050] The inflator rod 12 has a rod body 121 and an inflator piston 122. One end of the rod body 121 extends into the inflation cavity 111 and forms the inflator piston 122. The diameter of the inflator piston 122 is greater than the diameter of the rod body 121 and also greater than the inner diameter of the through hole 173 on the end cover 17, so that the end cover 17 can limit the inflator piston 122 in the inflator 11 to prevent it from falling out. A sealing ring 124 is arranged between the outer circle of the inflator piston 122 and the inner wall of the inflation cavity 111. The rod body 121 is hollow, and a gas passage 125 is formed in the end close to the inflator piston 122 to communicate the inside of the rod body 121 with the inflation cavity 111. The other end of the rod body 121 communicates with the outside, that is, the inside of the rod body 121 communicates with the inflation cavity 111, so that the user can pull the inflator rod 12 back and forth more easily.

[0051] The other end of the rod body 121 extends out of the inflator 11 and is provided with a hand holding part 13. Figure 4 As shown in the figure, the hand holding part 13 includes a handle 132 for the user to hold and a fixing seat 131 for fixing the rod body 121. The handle 132 is arranged perpendicularly to the rod body 121 in a cylindrical shape. The fixing seat 131 has a insertion hole 134 in the middle for the end of the rod body 121 away from the inflator piston 122 to insert into. The fixing seat 131 is provided with a limiting hole 133 on the side. The rod body 121 is provided with a limiting block 123 matched with the limiting hole 133, and the limiting block 123 is clamped into the limiting hole 133.

[0052] As shown in the figure, Figure 2As shown, the gas storage device 2 is installed below the main mounting seat 14, has a gas storage cylinder 21 in a hollow cylindrical structure, one end of which is formed into a gas storage mounting end 211 mounted to the main mounting seat 14, the other end is provided with a gas outlet 212, and the middle of the inside of the gas storage cylinder 21 is provided with a gas outlet pipe 22, in which a gas outlet cavity 23 is formed to communicate with the outside, and the gas outlet pipe 22 and the inner wall of the gas storage cylinder 21 form a gas storage cavity 24. In this embodiment, the gas storage cylinder 21 is a steel structure, and the gas storage cylinder 21 and the gas outlet pipe 22 are separately arranged, the bottom of the gas outlet pipe 22 is mounted at the gas outlet 212 through a gas outlet mounting seat 221 and a sealing gasket, and the middle is positioned in the gas storage cylinder 21 through a gas outlet pipe support 27, and a gas outlet nozzle 25 is fixedly installed at the gas outlet 212, and the outer end of the gas outlet nozzle is provided with a threaded structure or a quick mounting structure for connecting with a plug device.

[0053] The outer periphery of the gas storage mounting end 211 is provided with external threads matched with the internal threads in the inner side of the outer ring wall 143 of the main mounting seat 14, the gas storage mounting end 211 is connected on the outer ring wall 143 through threads, and the top of the connecting cavity 144 formed between the outer ring wall 143 and the inner ring wall 142 is provided with a gas storage sealing ring 28, and the top of the gas storage mounting end 211 is arranged on the gas storage sealing ring 28, so that the main mounting seat 14 and the gas storage mounting end 211 are sealingly connected. The gas outlet pipe 22 is a through pipe with both ends open, and a rubber ring 26 is sleeved on the end of the gas outlet pipe 22 away from the gas outlet 212 (i.e. the gas inlet end of the gas outlet pipe 22), which is used to cooperate with the main piston 10. When inflating, the main piston 10 is pushed downward (i.e. moves toward the rubber ring 26) by the gas from the inflation cavity 111 and directly moves to a position where the bottom surface of the main piston 10 is in contact with the top of the rubber ring 26. Under the action of high-pressure gas, the main piston 10 is tightly arranged on the rubber ring 26, thereby closing the gas inlet end of the gas outlet pipe 22 and isolating the communication between the gas outlet cavity 23 and the gas storage cavity 24, so that the gas from the inflation cavity 111 can only enter the connecting cavity 144 and the gas storage cavity 24 through the gas inlet cavity 141, thereby realizing the gas storage in the gas storage cavity 24.

[0054] In addition, the diameter of the side of the main piston 10 facing the rubber ring 26 (i.e. the acting surface in contact with the rubber ring 26) is greater than the outer diameter of the rubber ring 26, so that in the deflation process, the main piston 10 can be pushed back into the gas inlet cavity 141 by the gas accumulated in the gas storage cavity 24, and once the main piston 10 leaves the rubber ring 26, the gas accumulated in the gas storage cavity 24 can be quickly released from the gas outlet nozzle 25 along the gas outlet pipe 22, thereby realizing high-pressure dredging.

[0055] As shown in Figure 5 , 6 The pressure display device includes a pressure mounting seat 31, a pressure valve core 32, a pressure reset member 34, and a pressure valve cover 33.

[0056] The pressure mounting base 31 is integrally formed on the main mounting base 14 and is provided with a pressure cavity 311 and a pressure gas port 312 connecting the pressure cavity 311 and the gas storage cavity 24 (the connecting cavity 144), and the gas in the gas storage cavity 24 can enter the pressure cavity 311 through the pressure gas port 312.

[0057] The pressure valve core 32 has a pressure sealing part 321 for sealing the pressure cavity 311 and a pressure valve rod part 322, which are integrally formed, and the pressure sealing part 321 is provided with a pressure sealing ring 323 movably arranged in the pressure cavity 311 and sealing the pressure cavity 311;

[0058] The outer end of the pressure cavity 311 is provided with a pressure valve cover 33 having an annular pressure cover body 331 matched with the pressure cavity 311 and an outward flange 332 arranged at the outer end of the annular pressure cover body 331, and the annular pressure cover body 331 is transitionally matched or interference fitted with the pressure mounting base 31. A pressure return member 34 is arranged between the pressure valve core 32 and the pressure valve cover 33, and the pressure return member 34 is preferably a spring, and the pressure valve rod part 322 extends out of the pressure cavity 311 after sequentially passing through the pressure return member 34 and the pressure valve cover 33.

[0059] In the embodiment, the housing 18 is provided with a containing groove 182, the side wall of the containing groove 182 is provided with a containing hole 1821 for the pressure valve rod part 322 of the pressure valve core 32 to pass through, and the containing groove 182 or the extending end of the pressure valve rod part 322 is provided with a pressure scale line 183, and the pressure scale line 183 is marked with the numbers 2, 4, 6 and the like corresponding to the pressure.

[0060] Since the pressure cavity 311 and the gas storage cavity 24 (the connecting cavity 144) are connected with each other, the pressure valve core 32 can move according to the pressure of the gas storage cavity 24, when the pressure of the gas storage cavity 24 is relatively low, the pressure sealing part 321 of the pressure valve core 32 is pressed at the position close to the pressure gas port 312 under the action of the pressure return member 34, and the pressure valve rod part 322 extends out of the containing groove 182 with a relatively short distance; when the pressure of the gas storage cavity 24 increases, the pressure of the pressure cavity 311 also increases, which can overcome the force of the pressure return member 34 and push the pressure sealing part 321 of the pressure valve core 32 to move towards the position of the pressure valve cover 33, so that the distance of the pressure valve rod part 322 extending out of the containing groove 182 increases, thereby displaying the pressure value of the gas storage cavity 24 through the extending distance of the pressure valve rod part 322, so that the user can view and know the gas pressure in the gas storage cavity 24 in real time, and when the preset gas pressure is reached, the gas control device can be started to work.

[0061] In addition, the integral design of the pressure mounting base 31 allows the pressure valve core 32 to be directly movably arranged in the pressure cavity 311, which, compared with the split design of the pressure display table, reduces the mounting sealing structure between the pressure mounting base and the main mounting base, which is equivalent to reducing one air leakage risk, and further ensures the reliability of the dredger.

[0062] In order to prevent the pressure valve cover 33 from loosening or falling off under the high pressure of the pressure reset member 34 or the pressure cavity 311, the inner wall of the shell 18 is provided with an abutting portion 181, as shown in the drawings. Figure 7 The abutting portion 181 of the embodiment is two tabs extending on the inner wall of the accommodating groove 182 and the inner wall of the shell, and is located on both sides of the accommodating hole 1821. When the shell 18 is fixed on the main mounting base 14, the abutting portion 181 is used to fix the pressure valve cover 33 on the pressure mounting base 31 and prevent it from separating from the pressure cavity 311.

[0063] In order to facilitate the circumferential positioning of the shell on the main mounting base 14, the end surface of the main mounting base 14 close to the inflator is provided with at least one positioning protrusion 146, and the inner wall of the shell 18 is provided with at least one positioning groove 184 matched with the positioning protrusion 146. In the embodiment, the positioning protrusion 146 is provided with two and symmetrically arranged on the main mounting base 14 on one side of the inflator 11, and the inner wall of the shell 18 is correspondingly provided with two positioning protrusions. The positioning groove 184 is formed between the two positioning protrusions. When the shell 18 is installed on the main mounting base 14, the positioning protrusion 146 is clamped into the corresponding positioning groove 184, thereby achieving the circumferential fixation of the two.

[0064] As shown in the drawings, Figure 3 The deflation control device 4 is installed on the main mounting base 14 and has a deflation button 41, a deflation valve 42 and a deflation connecting rod 43. The deflation button 41 is exposed and movably arranged on the shell 18, used to control the opening of the deflation valve 42. The deflation valve 42 is installed on the deflation mounting base 15, which is integrally formed on the main mounting base 14. The deflation connecting rod 43 is installed between the deflation button 41 and the deflation valve 42, used to link the deflation button 41 and the deflation valve 42, that is, by sliding the deflation button 41, the deflation connecting rod 43 opens the deflation valve 42 for deflation.

[0065] As shown in the drawings, Figure 5 , 7 The deflation valve 42 comprises a deflation valve body 44, a deflation valve core 45, a deflation sealing member 46 and a deflation elastic member 47.

[0066] The air release valve body 44 is provided with an air release sealing ring 441 between the air release valve body 44 and the air release cavity 151. The outer end of the air release valve body 44 is provided with an outer blocking edge 445 which can be blocked on the outer end edge of the air release mounting seat 15. The inner end of the air release valve body 44 is inwardly extended with an inner blocking edge 444 and is shaped for installing the valve core mounting port of the air release valve core. The rotating outer blocking edge 445 can realize the clamping installation of the air release valve body 44. The air release valve core 45 is movably arranged on the air release valve body 44. One end of the air release connecting rod 43 is connected with the air release valve core 45. The air release connecting rod 43 can drive the air release valve core 45 to move along the air release valve body 44.

[0067] The shell 18 is provided with a fixed part 180 for limiting the position of the air release valve. The fixed part 180 is at least one fixed protrusion which is extended on the inner wall of the shell. When the shell 18 is fixed on the main mounting seat, the fixed part 180 is used for fixing the air release valve and preventing it from being separated from the air release cavity. In the embodiment, the fixed part 180 is two fixed protrusions which are respectively abutted on the left and right sides of the air release valve body 44. The fixed protrusions are provided with an avoiding gap between the air release valve core or the air release connecting rod.

[0068] The air release valve body 44 is provided with an air release valve cavity 442. The end of the air release connecting rod 43 is bent and formed with an extending end 433 which can extend into the air release valve cavity 442. The outer periphery of the extending end 433 is outwardly protruded and formed with a plurality of protrusions. The adjacent protrusions are formed with air grooves 434. The plurality of protrusions can not only play a guiding role, but also the air grooves 434 formed between the adjacent protrusions are beneficial to air release.

[0069] The air release valve core 45 is provided with an air release guide rod part 451 and an air release sealing part 452. One end of the air release guide rod part 451 extends into the air release valve cavity 442 and is embedded into the extending end 433 (i.e. the extending end 433 of the air release connecting rod 43 is sleeved on the air release guide rod part 451). The other end of the air release guide rod part 451 extends out of the air release valve cavity 442 and is formed with the valve core air release sealing part 452. The valve core air release sealing part 452 is provided with an air release sealing element 46 on the side facing the air release guide rod part 451, which is used for forming an end face sealing with the end face of the air release valve body 44. The air release elastic element 47 is a spring which is installed between the air release connecting rod 43 and the inner wall of the air release valve body 44 and is used for acting on the air release connecting rod 43. When the air release valve 42 is closed, the air release valve core 45 is pushed into the air release valve cavity 442 under the action of the gas. At the same time, the air release elastic element 47 can assist in pushing the air release connecting rod 43 and the air release button 41 to reset. The outer diameter of the air release guide rod part 451 is smaller than the inner diameter of the valve core mounting port. The outer periphery of the air release guide rod part 451 is outwardly protruded and formed with a plurality of protrusions. The adjacent protrusions are formed with air passing grooves 453 for the gas to pass through. The air release valve core 45 can form a sealing with the end face of the air release valve body 44 to close the air passing grooves 453 in the process of moving. In actual situation, the air release elastic element 47 can also be cancelled. The air release button 41 can be reset by manual sliding.

[0070] In the embodiment, the outer diameter of the convex strip is substantially the same as the inner diameter of the valve core mounting port, and the convex strip can not only guide the movement of the deflation valve core 45, but also facilitate the deflation through the air passage 453 formed between the convex strip and the valve core mounting port. In another embodiment, the outer diameter of the convex strip can be smaller than the inner diameter of the valve core mounting port.

[0071] When the deflation chamber 151 connected to the air inlet chamber is under high pressure, the valve core deflation sealing part 452 forms a surface seal with the end surface of the deflation valve body 44 through the deflation sealing member 46, thereby closing the air passage 453; when deflation is needed, the deflation valve core 45 is pushed inward under the action of an external force, the surface seal between the valve core deflation sealing part 452 and the end surface of the deflation valve body 44 is released, and the gas in the deflation chamber 151 can be discharged through the air passage 453. Alternatively, the deflation sealing member 46 is directly mounted on the end surface of the valve body, and the air passage is formed in the inner wall of the deflation valve chamber 442, which can also achieve the above-mentioned sealing and deflation functions. In order to enable the gas to enter the air passage 453 from the end where the deflation sealing part 452 is located, the outer diameter of the sealing member 26 and the valve core deflation sealing part 452 is smaller than the inner diameter of the deflation chamber 151, that is, a gap is formed between the outer periphery of the sealing member 26 and the valve core deflation sealing part 452 and the inner wall of the deflation chamber 151; at the same time, the outer diameter of the sealing member 26 and the valve core deflation sealing part 452 is larger than the inner diameter of the valve core mounting port of the deflation valve core, which is used to seal the end surface of the deflation valve body 44.

[0072] In the embodiment, the axis of the deflation chamber 151 is inclined to the axis of the air inlet chamber 141 (the gas storage chamber 24) or the inflation chamber 111 (i.e., the deflation mounting seat 15 is inclined to be arranged on one side of the inflator 11), and the deflation connecting rod 43 is vertically arranged (parallel to the axis of the inflation chamber 111), so that the deflation connecting rod 43 not only moves downward, but also moves horizontally during the movement of the deflation connecting rod 43. Therefore, the outer wall of the inflator is provided with a guide protrusion 432; the inner side of the deflation connecting rod 43 is provided with a guide groove 431 matched with the guide protrusion, and the deflation connecting rod 43 can not only move along the length direction of the guide protrusion 432, but also offset in the height direction of the guide protrusion 432.

[0073] When the gas pressure in the gas storage cavity 24 reaches a predetermined value, the deflation button 41 can be slid downward, the deflation connecting rod 43 slides downward and pushes the deflation valve core 45 to move, at this time, the deflation sealing element 46 leaves the end face of the deflation valve body 44 to form a gap, the gas in the gas inlet cavity 141 can enter the deflation cavity 151 through the deflation port 152, then enter the space between the inflator 11 and the outer shell 18 along the gap between the deflation sealing element 46 and the deflation valve body 44, the gap between the deflation valve core 45 and the deflation valve body 44 (the air passage 453), and the gap between the deflation connecting rod 43 and the deflation valve body 44 (the air passage 434), then is discharged to the outside along the gap between the deflation button 41 and the outer shell 18, finally, the main piston 10 moves upward to leave the rubber ring 26, the high-pressure gas in the gas storage cavity 24 is released from the gas outlet pipe instantaneously, and the high-pressure clearing blockage is realized.

[0074] The above embodiments are only preferred embodiments of the utility model, and do not limit the protection scope of the utility model, so that: equivalent changes made according to the structure, shape and principle of the utility model should be covered in the protection scope of the utility model.

Claims

1. An integrated pressure display device for being arranged on a main mounting seat (14) of a drain cleaner and displaying the pressure of a gas storage chamber of the drain cleaner, characterized in that, The pressure installation base (31) is integrally formed on the main installation base (14) and has a pressure cavity (311) communicating with the gas storage cavity (24). The pressure valve core (32) is movably arranged in the pressure cavity (311) and seals the pressure cavity (311). The pressure valve cover (33) is arranged at the outer end of the pressure cavity (311), and The pressure reset member (34) is arranged between the pressure valve core (32) and the pressure valve cover (33) and is used to reset the pressure valve core (32). The pressure valve core (32) can move according to the pressure of the gas storage cavity (24), so that the pressure value of the gas storage cavity (24) is displayed by the position of the pressure valve core (32). The pressure valve core (32) has a pressure sealing part (321) for sealing the pressure cavity (311) and a pressure valve rod part (322) which extends out of the pressure cavity (311) after passing through the pressure reset member (34) and the pressure valve cover (33) in sequence, and the pressure value of the gas storage cavity (24) is displayed by the extension distance of the pressure valve rod part (322).

2. The integrated pressure display device according to claim 1, wherein: The pressure sealing part (321) is provided with a pressure sealing ring (323).

3. The integrated pressure display device of claim 2, wherein:

4. The integrated pressure display device according to claim 2, characterized in that: The pressure valve cover (33) has an annular pressure cover body (331) matched with the pressure cavity (311) and an outer flange (332) arranged at the outer end of the annular pressure cover body (331). The annular pressure cover body (331) is transitionally matched or interference-fitted with the pressure installation base (31). The main installation base (14), 5. A drain opener comprising: The inflator (1) is arranged on one side of the main installation base (14) and has an inflator cavity (111); The gas storage device (2) is arranged on the other side of the main installation base (14) and has a gas storage cavity (24) communicating with the inflator cavity (111), and The pressure display device (3) is arranged on the main installation base (14) and communicates with the gas storage cavity (24). The pressure display device (3) is the integrated pressure display device according to any one of claims 1-4. The housing (18) is further provided with an abutting part (181) on the inner wall, which is used to fix the pressure valve cover (33) on the pressure installation base (31) and prevent it from being separated from the pressure cavity (311) when the housing (18) is fixed on the main installation base (14). The housing (18) is provided with a containing groove (182), the side wall of the containing groove (182) is provided with a containing hole (1821) through which the pressure valve rod part (322) of the pressure valve core (32) passes, and the containing groove (182) or the extension end of the pressure valve rod part (322) is provided with a pressure scale line (183).

6. A drain unblocker according to claim 5, wherein: The inflator (1) comprises:

7. A drain unblocker according to claim 6, wherein: The inflator cylinder (11) is integrally formed on the main installation base (14); 8. A drain cleaner as defined in claim 6 wherein: The inflator rod (12) is movably arranged in the inflator cavity (111); and ​ ​ an end cover (17) mounted at an end of the inflator (11) away from the main mounting base (14), wherein an outer shell (18) is sleeved on the outer periphery of the inflator (11) and is fixed between the main mounting base (14) and the end cover (17).

9. The drainpipe according to claim 8, characterized in that: the end cover (17) has an inner ring portion (171) and an outer ring portion (172), the inner ring portion (171) has a through hole (173) formed around the inner side thereof for the inflator rod (12) to pass through, and the inner wall of the outer ring portion (172) has an inner threaded portion connected with the inflator (11), the outer end of the inflator (11) is provided with an outer threaded portion, when the end cover (17) is threadedly connected to the inflator (11), one end of the outer shell (18) abuts against the main mounting base (14) and the other end abuts against the outer ring portion (172).

10. A drain cleaner as defined in claim 7 wherein: the main mounting base (14) is provided with at least one positioning protrusion (146) on the end face close to the inflator, the inner wall of the outer shell (18) is provided with at least one positioning groove (184) matched with the positioning protrusion (146).

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