CN217814865U - Normally open type pressure relief structure - Google Patents

Abstract

The utility model discloses a normally open type pressure relief structure which is arranged on mechanical equipment and comprises a conduction chamber, wherein a normally open type pressure relief hole is arranged on the conduction chamber; normally open the pressure release hole and make and be equipped with the utility model discloses an equipment just can carry out the pressure release work when producing pressure and temperature, just begins the pressure release when avoiding the inside pressure of equipment and temperature to be in higher state, makes and is equipped with the utility model discloses an equipment is more safe.

Description

Normally open type pressure relief structure

Technical Field

The utility model relates to a mechanical equipment's manufacturing research and development field, more specifically say, relate to a pressure release structure open in usual.

Background

With the development of science and technology, mechanical equipment is widely appeared in daily life of people, and brings convenience to work and life of people; some devices such as motors, engines and the like convert other forms of energy into mechanical energy, and transmit the mechanical energy through transmission devices such as gears, bearings, connecting shafts and the like, so as to assist people in working and living; in general, in order to protect transmission devices such as gears and the like to complete mechanical energy transmission, a conduction chamber is arranged in mechanical equipment, and the transmission devices are arranged in the conduction chamber; however, according to the law of conservation of energy, other forms of energy are converted into mechanical energy and heat energy is also generated, so that high temperature and high pressure often occur in a conduction chamber and other spaces of equipment; the generation of high temperature and high pressure can damage equipment to a great extent and possibly cause harm to people using the equipment; therefore, the pressure relief problem of the high-pressure and high-temperature space in the equipment is very important; under the general condition, pressure relief structure just begins the pressure release only when internal pressure reaches certain intensity, and then makes the inside pressure and the temperature of equipment be in dangerous state, consequently needs a pressure relief structure that can real-time pressure release to possess certain pressure release efficiency.

Disclosure of Invention

The utility model overcomes prior art's is not enough, provides simple structure, reasonable in design, possess higher pressure release efficiency, a more safe normally open pressure release structure.

In order to solve the technical problem, the technical scheme of the utility model as follows:

a normally open type pressure relief structure is arranged on mechanical equipment and comprises a conduction chamber, wherein a normally open type pressure relief hole is formed in the conduction chamber.

Further, the normally open pressure relief hole is arranged at the upper half part of the conduction chamber.

Further, still include and filter the piece, filter the piece and set up in normally opening the pressure release downthehole, perhaps set up in the position that the conduction room corresponds normally opening the pressure release hole.

Furthermore, a filtering space is arranged in the conduction chamber, and the filtering piece is arranged in the filtering space; the filtering space is communicated with the normally open pressure relief hole and the conduction chamber.

Further, the filtering space comprises a filtering inlet and a filtering outlet, the filtering outlet is communicated with the normally-open pressure relief hole, and the filtering inlet is arranged at one end of the filtering space corresponding to the lower half part of the conduction chamber.

Furthermore, the filtering piece is arranged in the normally open pressure relief hole, and the filtering limiting block is arranged in the normally open pressure relief hole.

Furthermore, filter the stopper and set up in the one end that the conduction room was kept away from in the pressure release hole of normally opening, filter and filter the stopper contact.

Further, filter the stopper and include interior stopper and outer stopper, outer stopper sets up in the one end that the conduction room was kept away from in normally opening the pressure release hole, and interior stopper sets up in the one end that normally opens the pressure release hole and be close to the conduction room, filters and sets up between interior stopper and outer stopper.

The utility model has the advantages that:

the utility model discloses a normally open the pressure release hole and make and be equipped with the utility model discloses an equipment just can carry out pressure release work when producing pressure and temperature, just begins the pressure release when avoiding the inside pressure of equipment and temperature to be in higher state, makes and is equipped with the utility model discloses an equipment is more safe.

Generally speaking, the gas with higher temperature is usually located above the gas with lower temperature, so the normally open pressure relief hole is arranged at the upper half part of the conduction chamber, and the pressure relief efficiency of the equipment can be accelerated by the phenomenon.

Normally open the pressure release hole and still be provided with and filter and play grease-proof gas filtering effect, avoid the greasy dirt to plug up normally open the pressure release hole and lead to the pressure release difficulty.

The filtering piece of the normally open pressure relief hole is more firm and stable in assembly due to the arrangement of the filtering space.

When the temperature rises gradually and the pressure becomes larger gradually, the gas in the gear meshing area rises, the filtering inlet is arranged at one end of the filtering space corresponding to the lower half part of the gear meshing area, and the high-pressure gas in the gear meshing area can enter the filtering space conveniently.

Drawings

Fig. 1 is a sectional structure view of a hammer pick product.

Fig. 2 is a sectional view of a gear meshing area.

Fig. 3 is a structural view of a controllable pressure relief hole.

Fig. 4 is a structure view of a relief valve side of the crankcase.

Fig. 5 is a view showing a structure of a normally open relief hole side of the crankcase.

Fig. 6 is a structure view of the inside of the crankcase.

Fig. 7 is a structural view of the oil cover.

Fig. 8 is a cross-sectional view of the oil seal cover.

Fig. 9 is a view showing an internal structure of the oil cover.

Fig. 10 is a side view of the cover.

Fig. 11 is a view showing a space structure inside the lock cover of the cover body.

Fig. 12 is a structural view of an end face where an assembly stopper portion of the inner gland is located.

Fig. 13 is a structural view of an end face where a screw stopper of the inner gland is located.

Fig. 14 is a front exploded view of the oil seal cover.

Fig. 15 is a reverse exploded view of the oil cap.

Fig. 16 is a view showing the filter element assembled in the oil cover body.

Fig. 17 is a sectional view of the present invention in example 1.

FIG. 18 is a sectional view of the filtration space in example 1.

Figure 19 is a cross-sectional view of a normally open pressure relief vent in accordance with example 2.

FIG. 20 is a cross-sectional view of a normally open pressure relief vent according to example 3.

Reference numbers in the figures:

1. an oil seal cover body; 2. a filter member; 3. a cover body; 4. a pressure relief column; 5. an inner gland; 6. a screw; 7. a rubber ring; 21. a filter member through hole; 31. closing the inner space; 32. an exhaust hole; 33. a top plate; 34. a side plate; 35. a reinforcing block; 36. assembling the groove; 37. sealing the groove with oil; 38. screwing down the groove; 41. a pressure relief space; 42. an air inlet; 43. an opening; 44. assembling the column; 45. an assembly space; 46. assembling threads; 47. an inlet; 51. an inner gland gap; 52. an inner gland limiting block; 53. an inner gland through hole; 54. assembling a limiting part; 55. a screw limiting part; 56. assembling a limiting space; 57. a screw limiting space; 100. a crankcase; 101. a conduction chamber; 102. a gear engagement zone; 103. a crankshaft active region; 104. an oil filler; 105. sealing the oil cover; 106. filtering the space; 110. a pressure relief vent; 111. a normally open pressure relief vent; 114. a filtering limiting block; 115. an inner limiting block; 116. an outer stop block; 121. a controllable pressure relief vent; 122. a pressure relief valve; 123. a controllable pressure relief air inlet; 124. a controllable pressure relief vent; 125. a transition space; 126. a first region; 127. a second region; 131. a filtration inlet; 132. and (6) filtering the outlet.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments are only specific illustrations of the present invention, and the purpose thereof is to make the technical solution of the present invention better understood by those skilled in the art, and should not be considered as limitations of the present invention.

In the description of the present invention, it should be noted that the directions or positional relationships indicated as the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., appear based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention.

Example 1:

as shown in fig. 17, a normally open pressure relief structure is disposed on a mechanical device, and includes a conduction chamber 101, wherein a normally open pressure relief hole 111 is disposed on the conduction chamber 101; normally open pressure release hole 111 makes and be equipped with the utility model discloses an equipment just can carry out the pressure release work when producing pressure and temperature, just begins the pressure release when avoiding the inside pressure of equipment and temperature to be in higher state, makes and is equipped with the utility model discloses an equipment is more safe.

Generally speaking, the gas with higher temperature is usually above the gas with lower temperature, and the normally open pressure relief hole 111 is disposed in the upper half of the conduction chamber 101, which can accelerate the pressure relief efficiency of the device.

The filter element 2 is arranged in the normally open pressure relief hole or in the position of the conduction chamber corresponding to the normally open pressure relief hole; the filter piece 2 plays a role in oil-proof air filtration, and avoids oil contamination from blocking the normally-opened pressure relief hole 111 to cause pressure relief difficulty.

As shown in fig. 18, in the present embodiment, a filtering space 106 is provided in the conduction chamber 101, and the filter member 2 is provided in the filtering space 106; the filtering space 106 is communicated with the normally open pressure relief hole 111 and the conduction chamber 101; the filter space 106 is provided so that the filter member 2 of the normally open pressure relief hole 111 is assembled more firmly and stably.

The filtering space 106 comprises a filtering inlet 131 and a filtering outlet 132, the filtering outlet 132 is communicated with the normally open pressure relief hole, and the filtering inlet 131 is arranged at one end of the filtering space 106 corresponding to the lower half part of the conduction chamber 101; when the temperature of the gas in the conduction chamber 101 gradually rises and the pressure of the gas gradually increases, the gas will rise, and the filtering inlet 131 is disposed at one end of the filtering space 106 corresponding to the lower half part of the conduction chamber 101, so that the high-pressure gas in the conduction chamber 101 can enter the filtering space 106 conveniently.

In this embodiment, the end of the normally open pressure release hole away from the conduction chamber is in the shape of a circular truncated cone, and the end with the larger inner diameter is communicated with the outside, so as to ensure that the high-pressure gas in the normally open pressure release hole 111 can be smoothly discharged.

Example 2:

as shown in fig. 19, in the present embodiment, the filter element 2 is disposed in the normally open pressure relief hole 111, and a filter stopper 114 is disposed in the normally open pressure relief hole 111; the filtering limiting block 114 is arranged at one end of the normally open pressure relief hole 111 far away from the conduction chamber, and the filtering piece 2 is in contact with the filtering limiting block 114; the position of the filter element 2 is defined by the filter stop 114.

Other technical solutions of the present embodiment are the same as those of embodiment 1.

Example 3:

as shown in fig. 20, in the present embodiment, the filter element 2 is disposed in the normally open pressure relief hole 111, and a filter stopper 114 is disposed in the normally open pressure relief hole 111; the filtering limiting block 114 comprises an inner limiting block 115 and an outer limiting block 116, the outer limiting block 116 is arranged at one end of the normally-open pressure relief hole 111 far away from the conduction chamber, the inner limiting block 115 is arranged at one end of the normally-open pressure relief hole 111 close to the conduction chamber, and the filtering piece 2 is arranged between the inner limiting block 115 and the outer limiting block 116; so that the assembly of the filter element 2 is more stable.

Other technical solutions of the present embodiment are the same as those of embodiment 1.

Example 4:

in this embodiment, the normally open pressure relief holes 111 are distributed in the upper half of the conduction chamber 101; the inner diameter of the normally open pressure relief hole 111 is smaller than the diameter of oil molecules in the conduction chamber 101; the function of the filter element 2 is achieved by reducing the inner diameter of the normally open pressure relief hole 111; it is worth to be noted that, when the pressure relief effect is not good, the number of the normally open pressure relief holes 111 can be increased or decreased according to the requirement, and the inner diameter of the normally open pressure relief holes 111 can also be increased or decreased.

Other technical solutions of the present embodiment are the same as those of embodiment 1.

Example 5:

as shown in fig. 1 to 16, a pressure relief structure is provided for a hammer pick type product, and includes a crankcase 100, a conduction chamber 101 is provided in the crankcase 100, the conduction chamber 101 includes a gear engagement area 102 and a crankshaft active area 103, and the gear engagement area 102 is communicated with the crankshaft active area 103; the crankshaft active area 103 is provided with an oil filling port 104 and a corresponding oil sealing cover 105; the oil seal cover 105 comprises an oil seal cover body 1, and the oil seal cover body 1 is provided with an exhaust hole 32; a pressure relief hole 110 is also formed in the gear meshing area 102; the pressure relief hole 110 comprises a normally open pressure relief hole 111 and a controllable pressure relief hole 121 provided with a valve body; the oil sealing cover 105 of the hammer-pick product is provided with the exhaust hole 32, and the gear meshing area 102 is provided with the pressure relief hole 110, so that the hammer-pick product has a plurality of pressure relief points, and the pressure relief efficiency can be improved; the pressure relief holes 110 comprise normally open pressure relief holes 111 and controllable pressure relief holes 121, wherein the normally open pressure relief holes 111 enable the hammer pick product to perform pressure relief work when pressure and temperature are generated, and the situation that the pressure and the temperature in the equipment begin to relieve pressure when the pressure and the temperature are in a high state is avoided, so that the hammer pick product is safer; the setting of controllable pressure release hole 121 simultaneously, the further assurance is equipped with the security of hammer pick product, and pressure and the high temperature in equipment can't be when steady through normally opening pressure release hole 111, can carry out the pressure release through controllable pressure release hole 121, and then guarantees that the pressure and the temperature in the equipment are in invariable numerical value for the hammer pick product can be more stable and safe.

The normally open pressure relief hole 111 and the controllable pressure relief hole 121 are arranged on different surfaces of the gear meshing area 102, so that when the pressure relief work is carried out on the normally open pressure relief hole 111 and the controllable pressure relief hole 121 simultaneously, not only can the pressure relief be carried out more uniformly, but also the mutual influence between the normally open pressure relief hole and the controllable pressure relief hole can be avoided; normally open pressure release hole 111 and controllable pressure release hole 121 and all set up in the first half of gear engagement area 102, generally speaking, the higher gas of temperature is in the top of the lower gas of temperature usually, therefore normally open pressure release hole 111 and controllable pressure release hole 121 and all set up in the first half of gear engagement area 102, can accelerate the pressure release efficiency of equipment through this phenomenon.

In this embodiment, the normally open pressure relief hole 111 and the controllable pressure relief hole 121 are disposed on two sides of the gear engagement area 102, and the number of the normally open pressure relief hole 111 and the controllable pressure relief hole 121 is one; the number of the normally open pressure relief holes 111 and the controllable pressure relief holes 121 can be increased under the condition that the pressure relief efficiency of the product needs to be improved, so that the pressure relief efficiency of the hammer pick product is ensured.

In the present embodiment, the valve body is a pressure relief valve 122, and the opening and closing of the controllable pressure relief hole 121 is controlled by the pressure relief valve 122; the pressure release valve 122 can be automatically opened and closed according to the pressure, once the pressure is excessive, the pressure release valve 122 can be fully opened to release the pressure in time, otherwise, the pressure release valve is in a closed state; relief valve 122 allows controllable relief vent 121 to be opened and closed as needed, and allows the opening and closing steps to be more precise.

In some other schemes, a pressure sensor can be arranged in the corresponding high-pressure space, and the opening and closing of the controllable pressure relief hole 121 are controlled by a valve which is manually pushed according to the value of the sensor.

In this embodiment, the inner diameter of the controllable pressure relief hole 121 is larger than the inner diameter of the normally open pressure relief hole 111, so that when the controllable pressure relief hole 121 is opened, high-temperature and high-pressure gas can be rapidly discharged to complete the pressure relief process; the pressure and the temperature in the hammer pick product are kept at normal values.

The normally open pressure relief hole 111 is also provided with a filter element 2, the normally open pressure relief hole 111 plays a role in oil-proof air filtration through the filter element 2, and pressure relief difficulty caused by oil stain blocking the normally open pressure relief hole 111 is avoided; the filter member 2 is disposed in the normally open pressure relief hole, or disposed in the gear meshing area 102 corresponding to the normally open pressure relief hole.

In the embodiment, the filtering space 106 is arranged in the gear meshing area 102, the filtering element 2 is arranged in the filtering space 106, and the arrangement of the filtering space 106 enables the filtering element 2 with the normally open pressure relief hole 111 to be assembled more firmly and stably; the filtering space 106 is communicated with the normally open pressure relief hole 111 and the gear meshing area 102; filter space 106 includes filters import 131 and filters export 132, filters export 132 and communicates with each other with normally opening the pressure release hole, filters import 131 and sets up in the one end that filter space 106 corresponds gear engagement area 102 lower half to filter import 131 towards gear engagement area 102 lower half, when gear engagement area 102 gas when the temperature rises gradually, pressure grow gradually, this gas will rise, and then be convenient for gear engagement area 102 high-pressure gas gets into in the filter space 106.

In this embodiment, the height of the filtering inlet 131 is lower than the heights of the normally open pressure relief hole 111 and the controllable pressure relief hole 121; the filtering space 106 is columnar, the filtering outlet 132 is arranged on the side surface of the filtering space 106, and the filtering inlet 131 is arranged on the bottom surface of the filtering space 106; so that the gas in the gear meshing area 102 enters the filtering space 106 when the temperature gradually rises and the pressure gradually increases.

In the present embodiment, the controllable pressure relief hole 121 includes a controllable pressure relief air inlet 123, a controllable pressure relief air outlet 124 and an excess space 125; the transition space 125 is arranged between the controllable pressure relief air inlet 123 and the controllable pressure relief air outlet 124, the controllable pressure relief air inlet 123 is communicated with the gear meshing area 102, the controllable pressure relief air outlet 124 is communicated with the external space, and the pressure relief valve 122 is arranged on the controllable pressure relief air outlet 124; wherein the provision of excess space 125 enables more precise triggering of pressure relief valve 122; when the pressure and temperature in the gear meshing area 102 gradually increase, high-pressure gas enters the transition space 125, the relief valve 122 starts to operate when the gas pressure in the transition space 125 increases to a certain degree, and the relief valve 122 stops operating when the gas pressure in the transition space 125 falls to a certain degree.

In this embodiment, the transition space 125 is in a circular truncated cone shape, and includes a first area 126 and a second area 127, the first area 126 is communicated with the second area 127, one end of the first area 126 away from the second area 127 is communicated with the controllable pressure relief air inlet 123, and one end of the second area 127 away from the first area 126 is communicated with the controllable pressure relief air outlet 124; the inner diameter of the first area 126 is smaller than that of the second area 127, the inner diameter of the first area 126 is gradually increased, and the end with the larger inner diameter of the first area 126 is communicated with the second area 127; the high-pressure gas can be completely discharged, and the working judgment that the gas residue in the excessive space 125 affects the pressure release valve 122 is avoided.

In this embodiment, the end of the normally open pressure release hole away from the conduction chamber is in the shape of a circular truncated cone, and the end with the larger inner diameter is communicated with the outside, so as to ensure that the high-pressure gas in the normally open pressure release hole 111 can be smoothly discharged.

The oil seal cover 105 comprises an oil seal cover body 1, and the exhaust hole 32 is arranged on the oil seal cover body 1; a pressure relief space 41 is arranged in the oil seal cover body 1; the decompression space 41 enables high-pressure and high-temperature gas in the crankcase 100 to enter the decompression space 41 before being exhausted, so that the gas pressure and the gas temperature are relieved; the danger coefficient of the hammer pick product in the exhaust process is further reduced; the oil seal cover body 1 is also provided with an air inlet 42, and the air inlet 42 and the air outlet 32 are arranged on different sides of the pressure relief space 41; the air inlet hole 42 is communicated with the crankshaft active area 103; the oil seal cover 105 further comprises a filter element 2, the filter element 2 is arranged in the pressure relief space 41, the filter element 2 of the oil seal cover 105 plays a role in oil-proof air filtration, oil dirt is prevented from blocking the exhaust hole 32 in the oil seal cover 105, the air exhaust and pressure relief effect of the hammer pick product is better, and high temperature and high pressure in the crankcase 100 are further effectively relieved; filter element 2 is located between air outlet opening 32 and air inlet opening 42; the air inlet hole 42 is arranged to facilitate the high-pressure air in the crankcase 100 to enter the decompression space 41 and be exhausted through the exhaust hole 32; the filter element 2 is positioned between the air exhaust hole 32 and the air inlet hole 42, so that the filter element 2 plays a role of oil-proof air filtration, and oil stains are prevented from blocking the air exhaust hole 32 on the oil seal cover 105.

The oil cover 105 further includes an inner gland 5; an opening 43 is provided in the relief space 41, and the inner gland 5 is fitted at the opening 43; the position of the filter element 2 can be further limited by the arrangement of the inner gland 5, so that the overall structure of the hammer pick product is more stable; meanwhile, an inner gland notch 51 is formed in the inner gland 5, and the inner gland notch 51 is arranged corresponding to the air inlet hole 42, so that high-pressure air is prevented from entering the pressure relief space 41 through the air inlet hole 42 by the inner gland 5; the opening 43 and the intake hole 42 are provided on the same side of the relief space 41; an inner gland notch 51 corresponding to the air inlet is arranged on the inner gland 5; the size of the inner gland notch 51 is larger than that of the air inlet hole 42, so that the inner gland 5 is prevented from influencing the high-pressure air to enter the pressure relief space 41 through the air inlet hole 42; of course, the size of the inner gland slit 51 can also be equal to the size of the air inlet hole 42; at least one inner gland limiting block 52 is arranged on the inner gland 5, one end of the air inlet hole 42 far away from the exhaust hole 32 is provided with an inlet 47, and the inner gland limiting block 52 enters the air inlet hole 42 through the inlet 47; in this embodiment, two inner gland limiting blocks 52 are disposed on the outer surface of the inner gland 5, and the two inner gland limiting blocks 52 are symmetrically disposed, so that the inner gland 5 is assembled more firmly and stably; in addition, in this embodiment, the size of the inner gland limiting block 52 is smaller than that of the air inlet hole 42, so as to avoid affecting the high-pressure air entering the pressure relief space 41 through the air inlet hole 42; the position of the inner gland 5 is further limited by the arrangement of the inner gland limiting block 52, and the overall stability of the structure is improved; meanwhile, the inner gland 5 is limited in a mode that the inner gland limiting block 52 enters the air inlet 42, and other limiting structures are avoided being additionally arranged, so that the structure of the hammer pick product is simpler and clearer, and the hammer pick is convenient to install.

The inner gland 5 is connected with the oil seal cover body 1 through the screw 6, so that when the oil-proof air filtering effect of the filter piece 2 is poor, the inner gland 5 can be disassembled to replace the filter piece 2, the maintenance cost and the use cost of a hammer pick product are lower, and the replacement of the filter piece 2 is more convenient, time-saving and labor-saving; a fitting post 44 is provided in the relief space 41, a fitting space 45 is provided in the fitting post 44, and a fitting thread 46 is provided on an inner surface of the fitting space 45; the filter member 2 is provided with a filter member through hole 21 through which the mounting post 44 passes; an inner gland through hole 53 for the screw 6 to pass through is arranged on the inner gland 5; an assembly limiting part 54 is arranged on the end face, close to the oil seal cover body 1, of the inner gland through hole 53, and a screw limiting part 55 is arranged on the end face, far away from the oil seal cover body 1, of the inner gland through hole 53; the inner diameters of the assembly limiting part 54 and the screw limiting part 55 are both larger than the inner diameter of the inner gland through hole 53 and are arranged around the inner gland through hole 53; the assembly limiting part 54 surrounds to form an assembly limiting space 56, the inner diameter of the assembly limiting space 56 corresponds to the outer diameter of the assembly column 44, and one end of the assembly column 44 enters the assembly limiting space 56; the screw limiting part 55 surrounds to form a screw limiting space 57, and when the rod part of the screw 6 passes through the inner gland through hole 53 to enter the assembling space 45, the head part of the screw 6 enters the screw limiting space 57; the arrangement of the assembling limiting part 54 and the screw limiting part 55 enables the assembling of the inner gland 5 to be firmer and more stable, so that the overall strength of the hammer pick product is improved, the hammer pick product is more durable, and looseness is not easy to occur in the using process.

The oil seal cover body 1 comprises a cover body 3 and a pressure relief column 4; the lid body 3 includes a top plate 33 and a side plate 34, the side plate 34 is disposed on the lower surface of the top plate 33 and disposed around the top plate 33, and the top plate 33 and the side plate 34 surround to form a lid inner space 31; the pressure relief column 4 is arranged in the cap inner space 31, and the pressure relief space 41 is arranged in the pressure relief column 4; one end of the pressure relief column 4 is connected with the lower surface of the top plate 33; the exhaust hole 32 is arranged at the position of the top plate 33 corresponding to the pressure relief space 41 and is communicated with the pressure relief space 41 and the external space of the pressure relief oil seal cover 105; the air intake hole 42 is provided on the side surface of the pressure release column 4, communicating with the pressure release space 41 and the cap inner space 31; in the embodiment, the cover body 3 and the pressure relief column 4 are both cylindrical, so that the assembly of the hammer pick product and the assembly of the filter piece 2 are facilitated; the central point of the cover body 3 is overlapped with the central point of the pressure relief column 4, so that the pressure relief column 4 and the pressure relief space 41 can be positioned at the center of the cover sealing inner space 31, and high-pressure gas in the crankcase 100 can uniformly enter the pressure relief space 41; a reinforcing block 35 is further provided in the cap inner space 31, one end of the reinforcing block 35 is connected to the inner surface of the side plate 34, the other end of the reinforcing block 35 is connected to the side surface of the pressure release column 4, and one side surface of the reinforcing block 35 is connected to the lower surface of the top plate 33; the reinforcing block 35 is provided to further enhance the overall strength of the hammer pick product; a fitting groove 36 is provided on the outer surface of the side plate 34, and an oil seal cover groove 37 is provided at one end of the fitting groove 36 close to the top plate 33; still be provided with rubber circle 7, rubber circle 7 cover is in oil seal lid recess 37, and rubber circle 7 plays the shock attenuation, and is locking, sealed effect, avoids oil seal lid 105 to fly to split, causes the injury to people or thing.

In this embodiment, the filtering members 2 are made of wool, and have good elasticity and strong hygroscopicity, so that the oil contamination filtering effect is better.

It should be noted that other technical solutions of the hammer pick product are the prior art, and therefore are not described in detail.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the concept of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (6)

1. A normally open type pressure relief structure is arranged on mechanical equipment and is characterized by comprising a conduction chamber, wherein a normally open type pressure relief hole is arranged on the conduction chamber; the normally open pressure relief hole is formed in the upper half part of the conduction chamber; the normally open pressure relief hole comprises a pressure relief inlet and a pressure relief outlet; the filtering piece is arranged between the pressure relief inlet and the pressure relief outlet or arranged at the position of the conduction chamber corresponding to the pressure relief inlet.

2. The normally-open pressure relief structure according to claim 1, wherein a filtering space is provided in the conduction chamber, and the filtering member is provided in the filtering space; the filtering space is communicated with the normally open pressure relief hole and the conduction chamber.

3. The normally open pressure relief structure according to claim 2, wherein the filtering space includes a filtering inlet and a filtering outlet, the filtering outlet is communicated with the pressure relief inlet, and the filtering inlet is disposed at an end of the filtering space corresponding to the lower half portion of the conducting chamber.

4. The normally open pressure relief structure according to claim 1, wherein the filtering element is disposed in the normally open pressure relief hole, and a filtering limiting block is disposed in the normally open pressure relief hole.

5. The normally open pressure relief structure according to claim 4, wherein said filtering stopper is disposed at one end of the normally open pressure relief hole close to the pressure relief outlet, and the filtering element contacts with the filtering stopper.

6. The normally open pressure relief structure according to claim 4, wherein the filtering limiting block comprises an inner limiting block and an outer limiting block, the outer limiting block is disposed at one end of the normally open pressure relief hole close to the pressure relief outlet, the inner limiting block is disposed at one end of the normally open pressure relief hole close to the pressure relief inlet, and the filtering piece is disposed between the inner limiting block and the outer limiting block.

Images