CN212066468U - Pressure cooking appliance - Google Patents

Abstract

The utility model provides a pressure cooking utensil, include: a pot body having a cooking cavity; the pot cover, the lid is located on the pot body, and the pot cover includes face lid, inside lining and the steel lid that sets gradually by outer to interior, is provided with on the inside lining and rotates the piece, rotates the piece and is connected with the steel lid and rotate in order to drive the steel lid, and wherein, the pivot of rotating the piece and the center pin dislocation arrangement of inside lining. Use the technical scheme of the utility model the problem that pressure cooking utensil's pot cover among the prior art is thick can be solved effectively.

Description

Pressure cooking appliance

Technical Field

The utility model relates to a small household electrical appliances field particularly, relates to a pressure cooking utensil.

Background

At present, the korean type electric pressure cooker in the market generally comprises a cooker body and a cooker cover covered on the cooker body, wherein the cooker cover comprises a surface cover, an inner liner, a steel cover and an inner cover which are sequentially arranged from outside to inside. Wherein, the steel cover is rotationally arranged on the inner liner, the steel cover is provided with cover teeth, and the pot body is provided with pot teeth matched with the cover teeth. The middle part of inside lining is provided with other parts such as temperature-sensing piece and sets up the break-open rotating rod in the temperature-sensing piece top, and the break-open rotating rod is connected with the steel lid through hanging the post, and when rotating the break-open rotating rod, the steel lid can rotate thereupon.

Although the structure can realize the locking and unlocking of the pot cover, the thickness of the pot cover is thicker, and the structure is not beneficial to the miniaturization design.

SUMMERY OF THE UTILITY MODEL

A primary object of the present invention is to provide a pressure cooking device to solve the problem of thick cover of the pressure cooking device in the prior art.

In order to achieve the above object, the present invention provides a pressure cooking appliance, comprising: a pot body having a cooking cavity; the pot cover, the lid is located on the pot body, and the pot cover includes face lid, inside lining and the steel lid that sets gradually by outer to interior, is provided with on the inside lining and rotates the piece, rotates the piece and is connected with the steel lid and rotate in order to drive the steel lid, and wherein, the pivot of rotating the piece and the center pin dislocation arrangement of inside lining.

Use the technical scheme of the utility model, the pivot of rotating the piece and the center pin staggered arrangement of inside lining, above-mentioned structure make rotate the piece can with among the background art other parts such as the temperature sensing piece at the middle part of the inside lining of mentioning misplace on the horizontal plane to can reduce required space in the upper and lower direction between face lid and the inside lining, thereby attenuate the thickness of pot cover, do benefit to miniaturized design.

Further, the pot cover still includes the inner cup that is located the inside lining, and inner cup and the sealed cooperation of pot body are provided with the structure of stopping opening on the inner cup, be provided with on the inside lining with the structure of stopping opening correspond first dodge the mouth, rotate and be provided with on the piece and block complex cooperation structure with the structure of stopping opening. Under the condition that the cooker is pressed upwards, the cooker cover cannot be opened from the cooker body, and the structure can ensure the use safety of users.

Furthermore, the rotation angle of the rotating part is alpha, the matching structure is a matching rod, a connecting line of the axis of the opening stopping structure and the axis of the rotating part on the horizontal plane is a connecting line L, the maximum angle between the axis of the matching rod and the connecting line L is beta, and the ratio of alpha to beta is 10:3 to 10: 7. The structure ensures that when the matching structure is abutted with the opening preventing structure, the cover teeth on the pot cover are partially buckled with the pot teeth on the pot body, so that the pot cover is prevented from being opened from the pot body under the condition of upward pressing in the pot, and the structure can ensure the use safety of a user.

Furthermore, the opening stopping structure comprises a base arranged on the inner cover and a rod body movably arranged on the base, a through hole is formed in the base, an elastic sealing element is arranged in the through hole, the elastic sealing element separates the through hole into a first hole section communicated with the cooking cavity and a second hole section separated from the cooking cavity, and at least part of the rod body is positioned in the second hole section. The structure not only enables the opening stopping process to be simple, namely the matching rod can be abutted against the rod body after rotating to a preset angle so as to realize opening stopping, but also can ensure the sealing property, namely, the gas in the pot body can not flow to the position between the inner cover and the lining from the gap between the rod body and the seat body.

Further, the pot cover still includes the inner cup that is located the inside of inside lining, and inner cup and the sealed cooperation of pot body, wherein, be provided with on the inner cup and end the structure of opening, the center department of inside lining is provided with and ends the first mouth of dodging that the structure corresponds, and/or, is provided with first exhaust structure in the inner cup, and the center department of inside lining is provided with and seals the complex second exhaust structure with first exhaust structure. The structure enables the temperature sensing assembly and the second exhaust structure to be integrated in the middle of the lining, so that the layout is optimized, and meanwhile, the assembly efficiency is improved.

Further, the inside lining includes inside lining body and welt, and the center department of inside lining body is provided with the opening, and the welt lid is established at the opening part, and the center pin of inside lining passes the welt, rotates the piece and sets up on the inside lining body. The structure is simple and easy to process.

Further, the pot cover further comprises a baking assembly located below the lining, a third exhaust structure is arranged on the baking assembly, and a fourth exhaust structure in sealing fit with the third exhaust structure is arranged on the lining plate. The structure enables gas generated by baking to be smoothly discharged by the fourth exhaust structure, and prevents the gas generated by baking from entering between the lining and the inner cover and polluting the inner structure of the pot cover.

Further, the baking component is arranged in a lifting mode, a triggering structure is arranged on the baking component, a third avoiding opening corresponding to the triggering structure is arranged on the lining plate, and a switch is arranged on one side, far away from the baking component, of the lining plate. Above-mentioned structure can guarantee to toast the subassembly and can toast the operation when toasting the position, and when the position was toasted to the non-, can not toast the operation, guarantees cooking utensil's safety in utilization.

Furthermore, a guide cylinder is arranged on the lining plate, and a floatable temperature sensing assembly is arranged in the guide cylinder. The temperature sensing assembly is matched with the guide cylinder so that the temperature sensing assembly can be installed and float in a preset direction.

Further, be provided with first exhaust structure on the inner cup, first exhaust structure is including wearing to locate the blast pipe on the inner cup, be located the pressure limiting valve seat in the blast pipe circumference outside and set up in the inside pressure limiting valve of pressure limiting valve seat, the aiutage of second exhaust structure for upwards extending is provided with the sealing washer on the aiutage, the bottom cover of sealing washer is located on the lateral wall of pressure limiting valve seat, above-mentioned structure makes in can all get into the second exhaust structure by blast pipe combustion gas, prevent that gas from getting into between inside lining and the inner cup, guarantee the leakproofness. The lining plate is provided with a movable driving structure, a second avoiding opening is formed in the sealing ring, and part of the driving structure extends into the sealing ring through the second avoiding opening to be matched with the pressure limiting valve. The driving structure can lift or push the pressure limiting valve to achieve the purpose of exhausting.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 shows an exploded structural schematic view of an embodiment of a pressure cooking appliance according to the present invention;

fig. 2 shows a schematic top view of the inner liner of the lid of the pressure cooking appliance of fig. 1;

FIG. 3 is a schematic cross-sectional view of the grilling component of the pressure cooking appliance of FIG. 1 in a non-grilling position, wherein the cross-sectional view is taken along line A-A of FIG. 2;

fig. 4 shows an enlarged schematic structural view at X of the pressure cooking appliance of fig. 3;

FIG. 5 is a schematic cross-sectional view of the grilling component of the pressure cooking appliance of FIG. 1 in a grilling position, wherein the cross-sectional view is in the direction A-A of FIG. 2;

fig. 6 shows an enlarged schematic view of the pressure cooking appliance of fig. 5 at W;

fig. 7 is a cross-sectional view illustrating a lid of the pressure cooking appliance of fig. 1 with a driving structure in an initial position, wherein the cross-sectional direction is the direction C-C in fig. 2;

fig. 8 shows an enlarged schematic structural view at M of the pressure cooking appliance of fig. 7;

fig. 9 shows a schematic sectional view of a lid when the driving structure of the pressure cooking appliance of fig. 1 is capable of cooperating with a pressure limiting valve, wherein the sectional direction is in the direction of C-C in fig. 2;

fig. 10 shows an enlarged schematic structural view at O of the pressure cooking appliance of fig. 9;

FIG. 11 shows a cross-sectional schematic view of the lid of the pressure cooking appliance of FIG. 1, wherein the cross-sectional direction is in the direction D-D of FIG. 2;

fig. 12 shows an enlarged schematic structural view at P of the pressure cooking appliance of fig. 11;

FIG. 13 shows a perspective view of a liner body of a liner of the pressure cooking appliance of FIG. 1;

FIG. 14 shows a perspective view of a liner panel of the liner of the pressure cooking appliance of FIG. 1;

FIG. 15 illustrates a cross-sectional view of the inner lid of the pot lid of the pressure cooking appliance of FIG. 1 in cooperation with the first venting structure, the pressure limiting valve, and the open stop structure;

FIG. 16 shows an exploded view of the open stop structure of FIG. 15; and

fig. 17 shows a schematic top view of the inner lining of the lid of the pressure cooking appliance of fig. 1, wherein the rotation angle α and the maximum angle β are shown.

Wherein the figures include the following reference numerals:

1. a pan body; 2. a pot cover; 3. a baking assembly; 4. an inner cover; 5. a liner; 12. a cooking cavity; 26. a third exhaust structure; 49. a pressure limiting valve; 50. an open-stop structure; 134. a first avoidance port; 66. a fourth exhaust structure; 73. a pressure limiting valve seat; 74. a seal ring; 75. a second avoidance port; 76. a drive structure; 77. a face cover; 78. a second exhaust structure; 93. an operation section; 102. a switch; 103. a trigger structure; 104. a steel cover; 105. a temperature sensing assembly; 106. a rotating member; 107. a mating structure; 108. a base body; 109. a rod body; 110. a through hole; 111. an elastomeric seal; 112. a first bore section; 113. a second bore section; 114. a liner body; 115. a liner plate; 116. an opening; 117. a first exhaust structure; 118. an exhaust pipe; 56. a third dodging port; 120. and a guide cylinder.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

As shown in fig. 1 to 3, 5, and 17, the pressure cooking appliance of the present embodiment includes: a pot body 1 and a pot cover 2. Wherein the pot 1 has a cooking cavity 12. The pot cover 2 covers the pot body 1, the pot cover 2 comprises a face cover 77, an inner lining 5 and a steel cover 104 which are sequentially arranged from outside to inside, a rotating part 106 is arranged on the inner lining 5, the rotating part 106 is connected with the steel cover 104 to drive the steel cover 104 to rotate, and a rotating shaft of the rotating part 106 and a central shaft of the inner lining 5 are arranged in a staggered mode.

Use the technical scheme of the utility model, the pivot of rotating piece 106 and the center pin staggered arrangement of inside lining 5, above-mentioned structure makes other parts such as the temperature sensing piece at the middle part of rotating piece 106 can with the inside lining that mentions in the background art misplace on the horizontal plane to can reduce required space in the upper and lower direction between face lid 77 and the inside lining 5, thereby attenuate the thickness of pot cover 2, do benefit to miniaturized design.

As shown in fig. 1 to 4 and 15, in this embodiment, the pot cover 2 further includes an inner cover 4 located inside the inner liner 5, the inner cover 4 is in sealing fit with the pot body 1, the inner cover 4 is provided with an open stopping structure 50, the inner liner 5 is provided with a first avoiding opening 134 corresponding to the open stopping structure 50, and the rotating member 106 is provided with a fitting structure 107 in blocking fit with the open stopping structure 50. Specifically, in the present embodiment, when there is pressure in the pot body 1, the opening stopping structure 50 will float upward under the pressure of the gas in the pot and protrude from the first avoiding opening 134. At this time, if the user rotates the rotating member 106, the engaging structure 107 of the rotating member 106 rotates with the rotating member 106. When the engagement structure 107 is rotated to abut the open-stop structure 50, the engagement structure 107 cannot rotate any further, and therefore the rotating member 106 cannot rotate. Namely, under the condition that the cooker is pressed upwards, the cooker cover 2 can not be opened from the cooker body 1, and the structure can ensure the use safety of users.

As shown in fig. 17, in the present embodiment, the rotation angle of the rotation member 106 is α, the engagement structure 107 is an engagement rod, a line connecting the axis of the open-stop structure 50 and the axis of the rotation member 106 on the horizontal plane is a line L, and the maximum angle between the axis of the engagement rod and the line L is β, wherein the ratio of α to β is 10:3 to 10: 7. It should be noted that the above-mentioned rotation angle α refers to the lid opening angle of the lid 2, that is, the rotation angle required by the rotation member 106 when the lid 2 is switched from the locking position (the lid teeth on the lid 2 are completely engaged with the pot teeth on the pot body 1) to the unlocking position (the lid teeth on the lid 2 are completely disengaged from the pot teeth on the pot body 1). The structure ensures that when the matching structure 107 is abutted with the opening stopping structure 50, part of the cover teeth on the pot cover 2 is still buckled with the pot teeth on the pot body 1, so that the pot cover 2 is opened from the pot body 1 under the condition of preventing the pot from being pressed upwards, and the structure can ensure the use safety of users. Preferably, in the present embodiment, the rotation angle α is 140 °, and the maximum angle β between the axis of the engagement rod and the connecting line L is 70 °, i.e., the ratio of α to β is 2: 1.

As shown in fig. 4, 15 and 16, in the present embodiment, the opening stop structure 50 includes a seat 108 disposed on the inner lid 4 and a rod 109 movably disposed on the seat 108, the seat 108 has a through hole 110 therein, an elastic sealing member 111 is disposed in the through hole 110, the elastic sealing member 111 divides the through hole 110 into a first hole section 112 communicating with the cooking cavity 12 and a second hole section 113 separated from the cooking cavity 12, and at least a portion of the rod 109 is disposed in the second hole section 113. In particular, since the first hole section 112 is in communication with the cooking chamber 12, after the pressure on the pan body 1, the gas can enter the first hole section 112 and push the elastic sealing element 111. The resilient seal 111 deforms under gas pressure to urge the rod 109 thereon. The rod 109 can move upward under the urging of the elastic sealing member 111 and cooperate with the cooperating structure 107 to achieve the opening stopping function. In addition, the rod 109 is located in the second hole section 113 which is not communicated with the first hole section 112. Therefore, the gas in the pot body 1 does not enter the second hole section 113 and flows from the gap between the rod 109 and the base 108 to the gap between the inner lid 4 and the inner liner 5. It should be noted that, the above structure not only makes the opening stopping process simple, i.e. the matching rod can abut against the rod 109 after rotating to a predetermined angle to realize opening stopping, but also can ensure the sealing property, i.e. the gas in the pot body 1 can not flow from the gap between the rod 109 and the seat body 108 to the gap between the inner lid 4 and the lining 5.

As shown in fig. 2, 13, 14 and 17, in the present embodiment, the liner 5 includes a liner body 114 and a lining plate 115, an opening 116 is disposed at a center of the liner body 114, the lining plate 115 covers the opening 116, a central axis of the liner 5 passes through the lining plate 115, and the rotating member 106 is disposed on the liner body 114. The structure is simple and easy to realize. Of course, in other embodiments not shown in the figures, the liner body and the liner plate may be of a unitary construction.

As shown in fig. 3 and 4, in this embodiment, the pot cover 2 further includes an inner cover 4 located inside the liner 5, the inner cover 4 is in sealing fit with the pot body 1, the inner cover 4 is provided with an open stopping structure 50, the lining plate 115 is provided with a first avoiding opening 134 corresponding to the open stopping structure 50, the inner cover 4 is provided with a first exhaust structure 117, and the lining plate 115 is provided with a second exhaust structure 78 in sealing fit with the first exhaust structure 117. Preferably, in the present embodiment, the inner liner 5 is provided with a temperature sensing assembly 105, and the temperature sensing assembly 105 can measure the temperature in the cooking cavity 12. The above structure enables the temperature sensing assembly 105 and the second exhaust structure 78 to be integrated on the same liner plate 115, thereby improving assembly efficiency. Of course, in other embodiments, the first escape opening 134 or the second venting structure 78 may be provided in the liner 115.

As shown in fig. 3, 4, 8 and 9, in the present embodiment, the first exhaust structure 117 includes an exhaust pipe 118 penetrating through the inner lid 4, a pressure limiting valve seat 73 located at a circumferential outer side of the exhaust pipe 118, and a pressure limiting valve 49 disposed inside the pressure limiting valve seat 73, the second exhaust structure 78 is an exhaust cylinder extending upward, a sealing ring 74 is disposed on the exhaust cylinder, and a bottom of the sealing ring 74 is sleeved on an outer side wall of the pressure limiting valve seat 73. The above structure allows the gas exhausted from the exhaust pipe 118 to completely enter the second exhaust structure 78, preventing the gas from entering between the liner and the inner lid, and ensuring the sealing property.

As shown in fig. 3, 4, and 7 to 10, in the present embodiment, the liner plate 115 is provided with a movable driving structure 76, the sealing ring 74 is provided with a second avoiding opening 75, and a part of the driving structure 76 extends into the sealing ring 74 through the second avoiding opening 75 to cooperate with the pressure limiting valve 49. The drive structure 76 is capable of lifting or pushing the pressure limiting valve 49 for venting purposes. It should be noted that, in the present embodiment, the operation portion 93 is provided on the face cover 77, the pressure-limiting valve 49 has a fitting head at the top, and the driving structure can be fitted with the fitting head structure to lift the pressure-limiting valve 49. When the driving structure 76 is located at the initial position, the driving structure 76 and the fitting head of the pressure limiting valve 49 are arranged in a staggered manner in the horizontal plane, a user can push the driving structure 76 to move by pressing the operating part 93, so that part of the driving structure 76 moves to the lower side of the fitting head, and the continuous pressing operating part 93 can be matched with the fitting head to lift the pressure limiting valve 49, so that manual exhaust is realized.

In the present embodiment, the temperature sensing element 105, the packing 74, and the driving structure 76 are attached to the lining plate 115, and then the attached elements are attached to the lining main body 114. The above structure makes the liner 5 modular, thereby further improving the assembly efficiency.

As shown in fig. 1, fig. 2, fig. 5 to fig. 8, in the present embodiment, the pot lid 2 further includes a baking assembly 3 located below the liner 5. The structure enables the pressure cooking appliance to have a baking mode besides a pressure cooking mode, and the working mode is diversified to improve the use experience of users.

As shown in fig. 11, 12, 14, in the present embodiment, the toasting assembly 3 is provided with a third venting structure 26, and the lining 115 is provided with a fourth venting structure 66 which is in sealing engagement with the third venting structure 26. The structure enables the gas generated by baking to be smoothly exhausted by the fourth exhaust structure 66, and prevents the gas generated by baking from entering between the liner and the inner cover and polluting the inner structure of the pot cover 2.

As shown in fig. 5, 6 and 14, in the present embodiment, the toasting assembly 3 is arranged in a lifting manner, the toasting assembly 3 is provided with a triggering structure 103, the lining plate 115 is provided with a third avoiding opening 56 corresponding to the triggering structure 103, and the lining plate 115 is further provided with a switch 102. In the embodiment, the switch 102 is a normally closed switch, and when the toasting assembly 3 is lifted to the non-toasting position, the trigger structure 103 can touch the switch 102 to turn off the switch 102, so that the toasting assembly 3 cannot work. Above-mentioned structure can guarantee to toast subassembly 3 and can toast the operation when toasting the position, and when the position was toasted to the non-, can not toast the operation, guarantees cooking utensil's safety in utilization. In addition, the trigger structure 103 is integrated with other components on the backing plate 115, which can further improve assembly efficiency.

When the pressure cooking utensil works in a pressure cooking mode, the inner cover 4 floats upwards under the upward abutting force of gas, the temperature sensing assembly 105 floats upwards along with the inner cover 4, and if the temperature sensing assembly 105 is fixed on the inner liner, the inner liner 5 can be abutted and deformed by the temperature sensing assembly 105. In order to solve the above problem, as shown in fig. 3 to 6, in the present embodiment, a guide tube 120 is disposed on a lining plate 115, a temperature sensing element 105 is floatably disposed on the lining plate 115, and the temperature sensing element 105 is engaged with the guide tube 120. The structure ensures that the lining plate 115 cannot be propped against and deform even if the temperature sensing assembly 105 floats upwards, and the service life of the lining is ensured. In addition, the temperature sensing assembly 105 is matched with the guide cylinder 120 so that the temperature sensing assembly 105 can be installed to float in a preset direction.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A pressure cooking appliance, comprising:

a pan (1) having a cooking cavity (12);

pot lid (2), the lid is located on the pot body (1), pot lid (2) include by outer face lid (77), inside lining (5) and steel lid (104) that set gradually to interior, be provided with on inside lining (5) and rotate piece (106), rotate piece (106) with steel lid (104) are connected in order to drive steel lid (104) are rotatory, wherein, the pivot of rotating piece (106) with the center pin dislocation arrangement of inside lining (5).

2. The pressure cooking appliance of claim 1, wherein the pot cover (2) further comprises an inner cover (4) located inside the inner liner (5), the inner cover (4) is in sealing fit with the pot body (1), an open stopping structure (50) is arranged on the inner cover (4), a first open avoiding opening (134) corresponding to the open stopping structure (50) is arranged on the inner liner (5), and a matching structure (107) blocking the open stopping structure (50) is arranged on the rotating member (106).

3. Pressure cooking appliance according to claim 2, characterised in that the rotation element (106) has a rotation angle α, the engagement structure (107) is an engagement rod, the line between the axis of the retaining structure (50) and the axis of the rotation element (106) in the horizontal plane is a line L, and the maximum angle between the axis of the engagement rod and the line L is β, wherein the ratio α to β is between 10:3 and 10: 7.

4. Pressure cooking appliance according to claim 2, wherein said opening stop structure (50) comprises a seat (108) arranged on said inner lid (4) and a rod (109) movably arranged on said seat (108), said seat (108) having a through hole (110) therein, said through hole (110) being provided with an elastic sealing member (111) therein, said elastic sealing member (111) dividing said through hole (110) into a first bore section (112) communicating with said cooking chamber (12) and a second bore section (113) spaced from said cooking chamber (12), at least part of said rod (109) being located in said second bore section (113).

5. Pressure cooking appliance according to claim 1, wherein the pot lid (2) further comprises an inner lid (4) inside the inner liner (5), the inner lid (4) being in sealing engagement with the pot (1), wherein,

an opening stopping structure (50) is arranged on the inner cover (4), a first avoiding opening (134) corresponding to the opening stopping structure (50) is arranged at the center of the liner (5), and/or,

the inner cover (4) is provided with a first exhaust structure (117), and the center of the lining (5) is provided with a second exhaust structure (78) in sealing fit with the first exhaust structure (117).

6. Pressure cooking appliance according to claim 5, characterized in that the inner liner (5) comprises an inner liner body (114) and a lining plate (115), an opening (116) is provided at the center of the inner liner body (114), the lining plate (115) is covered at the opening (116), the central axis of the inner liner (5) passes through the lining plate (115), and the rotating member (106) is provided on the inner liner body (114).

7. Pressure cooking appliance according to claim 6, wherein the lid (2) further comprises a baking assembly (3) located below the liner (5), wherein a third venting structure (26) is provided on the baking assembly (3), and wherein a fourth venting structure (66) sealingly cooperating with the third venting structure (26) is provided on the lining plate (115).

8. The pressure cooking appliance according to claim 7, wherein the baking assembly (3) is arranged in a liftable manner, a trigger structure (103) is arranged on the baking assembly (3), a third avoiding opening (56) corresponding to the trigger structure (103) is arranged on the lining plate (115), and a switch (102) is arranged on one side of the lining plate (115) far away from the baking assembly (3).

9. Pressure cooking appliance according to claim 6, characterised in that a guide cylinder (120) is arranged on the lining plate (115), and a floatable temperature sensing assembly (105) is arranged in the guide cylinder (120).

10. Pressure cooking appliance according to claim 6, wherein the first venting structure (117) comprises a venting tube (118) passing through the inner lid (4), a pressure limiting valve seat (73) located circumferentially outside the venting tube (118), and a pressure limiting valve (49) arranged inside the pressure limiting valve seat (73), the second exhaust structure (78) is an exhaust cylinder extending upwards, a sealing ring (74) is arranged on the exhaust cylinder, the bottom of the sealing ring (74) is sleeved on the outer side wall of the pressure limiting valve seat (73), be provided with movably drive structure (76) on welt (115), be provided with the second on sealing washer (74) and dodge mouth (75), part drive structure (76) pass through the second dodges mouth (75) stretch into in sealing washer (74) with pressure limiting valve (49) cooperation.

Images